Texas Instruments TUSB8044RGC User manual

1
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TUSB8044RGC Evaluation Module
User's Guide
SLLU261A–April 2017–Revised February 2019
TUSB8044RGC Evaluation Module
TI's TUSB8044RGC evaluation module (EVM) is a functional board design that implements both a USB
3.0 hub and a USB 2.0 hub. The EVM can support both USB SuperSpeed (SS) and USB 2.0 high-speed
(HS), full-speed (FS), or low-speed (LS) operation on its USB ports. The EVM enumerates a Billboard
device on a virtual downstream port for USB Type-C™ applications with alternate mode support. It has an
I2C Master controllable through an HID-compliant device enumerated on a virtual downstream port. This
EVM is intended for use in evaluating system compatibility, developing optional EEPROM firmware, and
validating interoperability. This EVM also acts as a hardware reference design for any implementation of
the TUSB8044.
Contents
1 Introduction ................................................................................................................... 2
2 Hardware Overview.......................................................................................................... 3
3 Hardware Setup.............................................................................................................. 5
Appendix A TUSB8044RGC REVD EVM Bill of Materials................................................................... 7
Appendix B TUSB8044RGC REVD EVM Schematics ....................................................................... 9
List of Figures
1 TUSB8044RGC EVM Top Layer Layout ................................................................................. 2
2 TUSB8044RGC REVD EVM Top Layer Layout ......................................................................... 9
3 USB Port Connections..................................................................................................... 10
4 Power ........................................................................................................................ 11
List of Tables
1 Switch Definitions............................................................................................................ 5
2 TUSB8044 QFN Lab EVM Bill Of Materials: Texas Instruments, CCI and ICP ..................................... 7
Trademarks
Microsoft, Windows are registered trademarks of Microsoft Corporation.
USB Type-C is a trademark of USB Implementer's Forum.
All other trademarks are the property of their respective owners.

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1 Introduction
Upon request, layout files for the EVM can be provided to illustrate techniques used to route the
differential pairs, use of split power planes, placement of filters and other critical components, and
methods used to achieve length matching of critical signals.
NOTE: The EVM accommodates various lab test components; actual production implementations
can be much smaller.
Figure 1 illustrates the TUSB8044RGC EVM top layer layout.
Figure 1. TUSB8044RGC EVM Top Layer Layout

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2 Hardware Overview
The TUSB8044RGCEVM board hardware can be divided into the following functional areas:
2.1 TUSB8044RGC
The TUSB8044 on the TUSB8044 EVM (U1 on the schematic) operates as a functional interconnect
between an upstream connection to a USB host or hub and up to four directly connected downstream
devices or hubs. More devices and hubs can be supported if arranged in tiers. The TUSB8044 is capable
of supporting operation at USB SuperSpeed (SS), high speed (HS), full speed (FS), or low speed (LS). In
general, the speed of the upstream connection of the TUSB8044RGCEVM limits the downstream
connections to that speed (SS, HS, and FS), or lower.
The TUSB8044 enumerates a Billboard device on a virtual downstream port for USB Type-C applications
with alternate mode support. It also has an I2C Master controllable through an HID compliant device
enumerated on a virtual downstream port.
The TUSB8044 requires a 24-MHz low-ESR crystal, Y1, with a 1-MΩfeedback resistor. The crystal should
be in fundamental mode with a load capacitance of 12 to 24 pF and a frequency stability rating of ±100
PPM or better. To ensure a proper startup oscillation condition, TI recommends a maximum crystal
equivalent series resistance (ESR) of 50 Ω.
The TUSB8044 can also use an oscillator or other clock source. When using an external clock source
such as an oscillator, the reference clock should have ±100 PPM (or better) frequency stability and have
less than 50-ps absolute peak-to-peak jitter (or less) than 25-ps peak-to-peak jitter after applying the USB
3.0 jitter transfer function.
2.2 USB Port Connectors
The TUSB8044 EVM is equipped with five standard 9-pin USB 3.0 port connectors. One of these five
connectors, J1, is a Type B connector designed to interface with an upstream USB host or hub. The
remaining connectors, J2, J3, J4, and J5, are Type A connectors for connection to downstream devices or
hubs. Standard size connectors were used on the EVM design, but USB micro connectors can be used, if
desired.
The USB ports can be attached through a standard USB cable to any USB 3.0 or legacy USB host, hub,
or device. The TUSB8044 will automatically connect to any upstream USB 3.0 host or hub at both SS and
HS. Using a legacy USB cable between the TUSB8044 EVM and a USB 3.0 host or hub forces it to HS
operation. The same is true if a legacy USB cable is used between the TUSB8044 EVM and a
downstream SS-capable device; operation will be limited to USB 2.0 HS.
2.3 USB Port Connector – Power
VBUS is received from the upstream host or hub on J1. The TUSB8044 is configured as a self-powered
hub, so there is not any significant current draw by the EVM from VBUS. The TUSB8044 does monitor the
VBUS input after filtering through a resistor divider network of a 90.9-kΩ, 1% resistor, R2, and a 10-kΩ,
1% resistor, R3. VBUS cannot be directly connected to the TUSB8044 device. A bulk capacitor of at least
1μF is required on the upstream port VBUS input to comply with the USB specification. The
TUSB8044EVM uses a 10-μF capacitor, C35.
VBUS, sourced by the 5-V wall power input, J6, is provided to the downstream port connectors. The USB
3.0 specification limits the current consumption of a USB 3.0 device to 900 mA at 5 V. The current limiting
parameter of the TPS2001C devices, U7, U8, U9, and U10, is 2 A to avoid any spurious overcurrent
events due to bus-powered HDD spin-up power fluctuations or unnecessary limiting during USB charging.
A production implementation could place stricter limits on this power consumption. An overcurrent event
on any of the downstream port connectors will be reported to the TUSB8044 through the OVERCURxZ
inputs.

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2.4 USB Port Connector – Noise Filtering
Each downstream VBUS output has a 150-μF bulk capacitor (C70, C71, C76, C79) as recommended by
the TPS2001C data manual (SLVSAU6) to prevent in-rush current events on the downstream devices. In
addition, there are ferrite beads and small capacitors on the VBUS lines to reduce noise and address ESD
and EMI concerns.
The TUSB8044EVM also implements optional isolation using two small noise-filtering capacitors and a 1-
MΩresistor between the earth ground of each connector and the digital ground of the EVM; this is not a
requirement, but should be used if ground isolation is desired.
NOTE: Note that the series capacitors implemented on the SS TX pairs are incorporated to satisfy
the USB 3.0 requirement that differential links be AC coupled on the transmit pair.
2.5 Optional Serial EEPROM
Each TUSB8044EVM is equipped with an onboard EEPROM or socket placeholder, U2. A small I2C
EEPROM can be installed to set the configuration registers as defined in the TUSB8044 data manual
(SLLSEW5). In its default setting, the EVM does not have an EEPROM installed and instead uses the
configuration inputs to determine any optional settings of the TUSB8044.
The EEPROM interface defaults to programmable (not write-protected) so that any installed contents on
the EEPROM may be modified to test various settings. If an EEPROM data change is required, the values
may be changed using the register access methods outlined in the TUSB8044 data sheet. In addition, a
Microsoft®Windows®based EEPROM utility is available upon request.
2.6 Power
The TUSB8044 EVM operates from the power provided by a 5-V wall power adapter, J6, not bus power
supplied by a USB host. TI recommends to use a wall power adapter that is capable of sourcing 2 to 3 A
because the hub must be able to source significant power on its downstream ports (900 mA per port).
The TUSB8044 EVM uses a single-channel LDO voltage regulator to drop 5 V to 3.3 V. The TPS7A4533,
U4, is a 1.5-A output linear regulator (SLVS720). The 1.1-V core voltage required by the TUSB8044 is
sourced by the 3.3-V rail to reduce unnecessary heat dissipation. The TPS74801, U6, is a 1.5-A output
single channel LDO linear regulator (SBVS074). Both regulators require few external passive components
and are appropriately rated for heat dissipation.
2.7 Hub Configuration
The TUSB8044EVM can be configured by setting several inputs to the TUSB8044 that are sampled at
power-on reset or using an optional serial EEPROM or SMBUS host. A production implementation without
EEPROM or SMBUS could either rely on the default internal pullup or pulldown resistor for each
configuration input or override it with an external pullup or pulldown resistor. The settings can be modified
using SW1 and SW2 on the EVM. Descriptions of the possible configuration changes are included in
Section 3.1.
2.8 Optional Circuitry
The TUSB8044 EVM design implements a variety of LEDs, none of which are required by the USB
specification. They are provided to make testing and debugging easier.
• D1 – indicates that the upstream USB port power is on
• D4 – indicates that 3.3 V is being applied to the TUSB8044 EVM
• D5 – indicates downstream USB port 1 power is on
• D6 – indicates downstream USB port 2 power is on
• D7 – indicates downstream USB port 3 power is on
• D8 – indicates downstream USB port 4 power is on
The switches (SW1, SW2, and SW3) and headers (J7, J8, J9) present on the TUSB8044 EVM are
intended only for lab evaluation and are not required for production designs.

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3 Hardware Setup
3.1 Configuration Switch
The TI TUSB8044EVM has a set of switches to facilitate configuration changes. TI does not recommend
changing these switch settings without a complete understanding of the result. Configuration inputs are
only read by the TUSB8044 during power-on reset, changing the switch settings while the EVM is
powered on will have no effect. For additional information, refer to the EVM schematic in Appendix B.
The switch definitions are shown in Table 1.
Table 1. Switch Definitions
Switch Standard Definition
SW1_1 Off TEST_TRSTz Switch
The TUSB8044 has an internal pulldown on this terminal. If the switch is set to the ON position, the terminal is pulled high
and test mode is enabled. This is a production test mode only.
SW1_2 Off SMBUSz Switch
The TUSB8044 has an internal pullup on this terminal, so I2C interface mode is enabled by default. If the switch is set to the
ON position, the terminal is pulled low and SMBUS mode is enabled.
SW1_3 Off SCL_SMBCLK Switch
The TUSB8044 has an internal pulldown on this terminal, so the serial EEPROM or SMBUS interface is disabled. If the
switch is set to the ON position, a pullup resistor is connected to the serial clock terminal to indicate that an I2C EEPROM
may be attached (along with a pullup resistor on SDA).
SW1_4 Off SDA_SMBDAT Switch
The TUSB8044 has an internal pulldown on this terminal, so the serial EEPROM or SMBUS interface is disabled. If the
switch is set to the ON position, a pullup resistor is connected to the serial clock terminal to indicate that an I2C EEPROM
may be attached (along with a pullup resistor on SCL).
SW1_5 Off PWRON1_BATEN1 Switch
The TUSB8044 has an internal pulldown on this terminal, so USB battery charging mode on Port 1 is disabled by default. If
the switch is set to the ON position, the terminal is pulled high and battery charging is enabled on downstream port 1.
SW1_6 Off PWRON2_BATEN2 Switch
The TUSB8044 has an internal pulldown on this terminal, so USB battery charging mode on Port 2 is disabled by default. If
the switch is set to the ON position, the terminal is pulled high and battery charging is enabled on downstream port 2.
SW1_7 Off PWRON3_BATEN3 Switch
The TUSB8044 has an internal pulldown on this terminal, so USB battery charging mode on Port 3 is disabled by default. If
the switch is set to the ON position, the terminal is pulled high and battery charging is enabled on downstream port 3.
SW1_8 Off PWRON4_BATEN4 Switch
The TUSB8044 has an internal pulldown on this terminal, so USB battery charging mode on Port 4 is disabled by default. If
the switch is set to the ON position, the terminal is pulled high and battery charging is enabled on downstream port 4.
SW2_1,
SW2_7 Off AUTOENZ_PD/BB_bmConfig1_PD Switch
When configured for I2C mode, this pin along with BBbmConfigured0 directly controls the bmConfigurated field in the
Billboard Capability descriptor. If SMBus is selected, then bmConfigured[1] field is determined by a register. If SMBus is
selected, the sampled value of this pin will set or clear the autoEnz bit in the Battery Charging Support Register. SMBus
master can at a later time override the register. If SMBus is selected and stsOutputEn bit is set, this pin will function as a
HS_SUSPEND (upstream HS suspend indicator). When enabled, a value of 1 indicates the connection is suspended.
SW2_2 Off GANGED_HS_UP/BB_CONNECT Switch
When configured for I2C mode, this pin functions as Billboard Enable. When high, the billboard device is enabled and
presented to system. When low, the billboard device is disabled. If SMBus is selected, then Billboard Enable is controlled by
a register.
If SMBus is selected and stsOutputEn bit is set, this pin will function as a HS_UP (upstream HS connection indicator). When
enabled, a value of 1 indicates the upstream port is connected to a HS USB-capable port.
If SMBus is selected, the value of the pin is sampled at the de-assertion of reset to set the power switch and overcurrent
detection mode as follows: 0 = Individual port power control supported. 1 = Ganged port power control supported. SMBus
master can at a later time override the register.
SW2_3 Off PWRCTL_POL Switch
The TUSB8044 has an internal pullup on this terminal, so port power control polarity defaults to active high. If the switch is
set to the ON position, the terminal is pulled low and the port power control polarity changes to active low.
SW2_4 Off FULLPWRMGMTZ_SS_UP/BB_bmConfig0 Switch
When configured for I2C mode, this pin along with BBbmConfigured1 directly controls the bmConfigurated field in the
Billboard Capability descriptor. If SMBus is selected, then bmConfigured[0] field is determined by a register.
If SMBus is selected and battery charging is enabled on any port, the sampled state of this pin will set or clear the
FullAutoEn bit in the Device Configuration Register 3. SMBus master can at a later time override the register.
If SMBus is selected and battery charging is disabled, then the value of the pin is sampled at the de-assertion of reset to set
the power switch control: SMBus master can override this function at a later time.
0 = Power Switching and over current inputs supported.
1= Power Switch and over current inputs not supported.
If SMBus is selected and stsOutputEn bit is set, ths pin will function as an SS_UP (upstream SS connection indicator).
When enabled, a value of '1' indicates the upstream port is connected to a SuperSpeed USB capable port.

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Table 1. Switch Definitions (continued)
Switch Standard Definition
SW2_5 Off SCL_SMBCLK PD Switch
The TUSB8044 has an internal pulldown on this terminal, so the serial EEPROM or SMBUS interface is disabled. If the
switch is set to the ON position, an external pulldown resistor is connected to the serial clock terminal for test purposes.
SW2_6 Off SDA_SMBDAT PD Switch
The TUSB8044 has an internal pulldown on this terminal, so the serial EEPROM or SMBUS interface is disabled. If the
switch is set to the ON position, an external pulldown resistor is connected to the serial clock terminal for test purposes.
3.2 EVM Installation
To install the EVM, perform the following steps:
1. Attach a 5-V, 3-A wall power source to J6.
2. Turn on switch SW3, LED D4 should be lit.
3. Attach a USB cable between J3 and a USB host. LEDs D1, D5, D6, D7 and D8 should be lit.
3.3 Troubleshooting
Case 1: Device function or functions are “banged out” in Device Manager.
• Make sure that the latest updates are installed for the operating system.
• Make sure that the latest drivers are installed for the host controller.
Case 2: The EVM does not work at all.
• Verify that all switches are in their default state and the EVM is powered on with a 5-V source with
adequate current to support any bus-powered devices (3 A+).
• If installed, remove the serial EEPROM from the EEPROM socket. The EVM does not require an
EEPROM to operate.
• Make sure shunts are installed on J7, J8, and J9.
• In the case where a 12-V power supply has been attached to the EVM, the fault is non-recoverable.

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TUSB8044RGC REVD EVM Bill of Materials
Appendix A
SLLU261A–April 2017–Revised February 2019
TUSB8044RGC REVD EVM Bill of Materials
This appendix contains the TUSB8044RGC REVD EVM BOM.
Table 2. TUSB8044 QFN Lab EVM Bill Of Materials: Texas Instruments, CCI and ICP
Item Qty Reference Part Manufacturer Part Number Pkg Description
1 1 C5 1uF Murata GRM219R61A105KA01D 805 1µF ±10% 10V Ceramic Capacitor X5R 0805
(2012 Metric)
2 1 C3 1uF Samsung CL05B105KQ5NQNC 402 CAP CER 1UF 6.3V 10% X7R 0402
3 5 C39,C47,C49,C57
,C59 0.001uF TDK C1005X7R1H102K 402 CAP CER 1000PF 50V X7R 10% 0402
4 9 C6,C9,C12,C15,C
19,C22,C25,C28,
C32,
0.001uF TDK C0603X7R1E102K030BA 201 CAP CER 1000PF 25V 10% X7R 0201
5 9 C7,C10,C13,C16,
C20,C23,C26,C29
,C33
0.01uF Yageo CC0201KRX7R7BB103 201 CAP CER 10000PF 16V 10% X7R 0201
6 18 C4,C38,C40,C41,
C46,C48,C50,C51
,C56,C58,C66,C6
9,C72,C75,C77,C
78,C80,C81
0.1uF Yageo CC0402KRX5R6BB104 402 CAP CERAMIC .1UF 10V X5R 0402
7 19 C8,C11,C14,C17,
C21,C24,C27,C30
,C34,C36,C37,C4
2,C43,C44,C45,C
52,C53,C54,C55
0.1uF TDK C0603X5R0J104M 201 CAP CER .10UF 6.3V X5R 0201
8 2 C1,C2 18pF AVX 04025A180JAT2A 402 CAP CERM 18PF 5% 50V NP0 0402
9 9 C18,C31,C35,C61
,C67,C68,C73,C7
4,C82
10uF Murata Electronics GRM31CR61C106KA88L 1206 CAPACITOR CERM 10UF 16V 10% SMD
10 4 C70,C71,C76,C79 150uF Kemet T495D157K010ATE100
(Tantalum) 7343 CAP TANT 150UF 10V 10% LOESR SMD
11 0 R10,R32,R42,R43
,R44,R45 NOPOP 402
12 6 D1,D4,D5,D6,D7,
D8 LED Green 0805 Lite On LTST-C171GKT 805 LED GREEN CLEAR THIN 0805 SMD
13 0 D2,D3 LED Green 0805 -
NOPOP Lite On LTST-C171GKT 805 LED GREEN CLEAR THIN 0805 SMD
14 5 FB1,FB3,FB4,FB5
,FB6 220 @ 100MHZ Ferrite Bead Murata BLM18PG221SN1D 603 FERRITE CHIP 220 OHM 1400MA 0603
15 2 SW1,SW2 8-POS 50-MIL
SMT C&K Components SD08H0SBR SWITCH DIP SPST SEALED 8POS SMD
16 1 J1 USB3_TYPEB_C
ONNECTOR Amphenol GSB321131HR 9_RA_TH_B CONN RCPT USB 3.0 TYPE B R/A 9PS
17 4 J2,J3,J4,J5 USB3_TYPEA_C
ONNECTOR Amphenol GSB311131HR 9_RA_TH_A CONN RCPT USB 3.0 TYPE A R/A 9PS
18 1 J6 2.1mm x 5.5mm
DC Power Jack CUI Inc. PJ-202AH 2.1mm x 5.5mm CONN PWR JACK 2.1X5.5MM HIGH CUR
19 6 R1,R15,R17,R18,
R19,R20 1M Rohm Semiconductor MCR01MZPJ105 402 RES 1.0M OHM 1/16W 5% 0402 SMD
20 1 R2 90.9K 1% Rohm
Semiconductor MCR01MZPF9092 402 RES 90.9K OHM 1/16W 1% 0402 SMD
21 4 R26,R27,R29,R36 10K Rohm
Semiconductor MCR01MZPJ103 402 RES 10K OHM 1/16W 5% 0402 SMD
22 1 R3 10K 1% Rohm
Semiconductor MCR01MZPF1002 402 RES 10K OHM 1/16W 1% 0402 SMD
23 4 R6,R7,R8,R9 4.7K Rohm
Semiconductor MCR01MZPJ472 402 RES 4.7K OHM 1/16W 5% 0402 SMD

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TUSB8044RGC REVD EVM Bill of Materials
Table 2. TUSB8044 QFN Lab EVM Bill Of Materials: Texas Instruments, CCI and ICP (continued)
Item Qty Reference Part Manufacturer Part Number Pkg Description
24 15 R4,R5,R11,R12,R
13,R14,R22,R23,
R24,R25,R38,R39
,R46, R47, R48
1K Rohm
Semiconductor MCR01MZPJ102 402 RES 1.0K OHM 1/16W 5% 0402 SMD
25 8 R16,R28,R30,R31
,R35,R37, 330 Rohm Semiconductor MCR01MZPJ331 402 RES 330 OHM 1/16W 5% 0402 SMD
R40,R41
26 1 R33 1.87K Vishay / Dale CRCW04021K87FKED 402 RES 1.87K OHM 1/16W 1% 0402 SMD
27 1 R34 4.99K Vishay / Dale CRCW04024K99FKED 402 RES 4.99K OHM 1/16W 1% 0402 SMD
28 1 R21 9.53K 1% Rohm
Semiconductor MCR01MRTF9531 402 RES 9.53K OHM 1/16W 1% 0402 SMD
29 1 U1 TUSB8044 - USB
3.0 Hub Texas Instruments TUSB8044RGC 64QFN
30 1 U2 AT24C04 I2C
EEPROM Assmann WSW
Components A 08-LC-TR 8DIP CONN IC DIP SOCKET 8POS TIN
31 4 U7,U8,U9,U10 TPS2001C Texas Instruments TPS2001CDGN 8DGN IC PWR SW USB 2.87A 1CH 8MSOP
32 1 U4 TPS7A4533 - 3.3V
Voltage Regulator Texas Instruments TPS7A4533KTT DDPAK-5 IC REG LDO 3.3V 1.5A 5-DDPAK
33 1 U6 TPS74801RGW -
1.1V Voltage
Regulator
Texas Instruments TPS74801RGW 20VQFN IC REG LDO ADJ 1.5A 20VQFN
34 1 Y1 ECS-24MHZ
Crystal ECS ECS-240-20-30B-TR 5.0mm x 3.2mm CRYSTAL 24.000 MHZ 20PF SMD
35 4 PCB Standoff Keystone
Electronics 2203 HEX STANDOFF 4-40 ALUMINUM 1/2"
36 4 Screw Keystone
Electronics 9900 MACHINE SCREW PAN PHILLIPS 4-40
37 1 FB2 0 ohm Yageo RC0603JR-070RL 603 RES 0.0 OHM 1/10W 0603 SMD
38 0 JP6 Conn 2x5 shroud -
NO POP 3M 2510-6003UB HDR5X2 M 0.1" TH
39 6 J7,J8,J9,J10,J11,J
12 Header 1x2 3M 961102-6404-AR HDR2X1 M 0.1" TH CONN HEADER VERT SGL 2POS GOLD
40 1 J13 Header 3PIN 3M 961102-6404-AR HDR2X1 M
0.1" TH CONN HEADER VERT SGL 2POS GOLD
41 1 SW3 Power Switch -
L101011MS02Q C&K Components L101011MS02Q SPST
42 0 GND1, GND2 NOPOP
43 1 LB1 sticker 3M 695-WHITE-2"X36YD add text: TUSB8044RGCEVM INT077-001 REV
A
44 6 Shunt Shunt 3M 969102-0000-DA Place shunts on: J7,J8,J9,J10,J11,J12
45 1 PCB BOARDS TUSB8044RGCE
VM INT077-001 TUSB8044RGCEVM PCBBOARD

Optional EEPROM Circuitry
US SSUS HS
JTAG is for lab evaluation only on TUSB8044.
This header and NOPOP pullups are not recommended
for customers.
Plac e shunts on: J7,J8,J9,J10,J11,J12
SDA_SMBDAT
PWRON1_BATEN1
SCL_PUP
SDA_PUP
SCL_SMBCLK
SDA_SMBDAT
PWRON2_BATEN2
PWRON4_BATEN4 BATEN3
BATEN0
BATEN1
OVERCUR1Z_TDI
OVERCUR2Z_TMS
PWRON3_BATEN3 BATEN2
SDA_SMBDAT
SCL_SMBCLK
GRSTZ
TEST_TRSTZ
AUTOENZ/BB_bmConfig1
SMBUSZ
TEST_TRSTZ TEST_PUP
SMBUSZ_PD
GANGED_HS_UP/BB_CONNECT
SMBUSZ
FULLPWRMGMTZ_SS_UP/BB_bmConfig0
PWRCTL_POL_TDO
AUTOENZ_PD/BB_bmConfig1_PD
GANGED_PU/BB_CONNECT_PU
PWRCTL_POL_PD
PWRCTL_POL_TDO
GANGED_HS_UP/BB_CONNECT_2
AUTOENZ/BB_bmConfig1
FULLPWRMGMTZ_PUP/BB_bmC onfig0_PU
GANGED_HS_UP/BB_CONNECT
FULLPWRMGMTZ_SS_UP/BB_bmConfig0
OVERCUR3z_TCK
OVERCUR2Z_TMS
OVERCUR1Z_TDI
PWRCTL_POL_TDO
TEST_TRSTZ
SCL_PD
SDA_PD
FULLPWRMGMTZ_SS_UP/BB_bmConfig0_2
AUTOENZ/BB_bmConfig1_2
AUTOENZ_PU/BB_bmConfig1_PU
SCL_SMBCLK
VDD11
BOARD_1P1V
BOARD_3P3V
VDD11
VDD33
BOARD_3P3V
BOARD_3P3V
VDD33
BOARD_3P3V
BOARD_3P3V
USB_DP_DN42
USB_DM_DN42
USB_SSRXP_DN42
USB_SSRXM_DN42
USB_SSTXP_DN42
USB_SSTXM_DN42
USB_DP_DN22
USB_DM_DN22
USB_SSRXP_DN22
USB_SSRXM_DN22
USB_SSTXP_DN22
USB_SSTXM_DN22
USB_DP_UP 2
USB_DM_UP 2
USB_SSRXP_UP 2
USB_SSRXN_UP 2
USB_SSTXP_UP 2
USB_SSTXM_UP 2
USB_VBUS_UP 2
USB_SSTXM_DN32
USB_SSTXP_DN32
USB_SSRXM_DN32
USB_SSRXP_DN32
USB_DP_DN32
USB_DM_DN32
PWRON4_BATEN4 3
PWRON1_BATEN1 3
PWRON2_BATEN2 3
PWRON3_BATEN3 3
USB_DP_DN12
USB_DM_DN12
USB_SSTXM_DN12
USB_SSTXP_DN12
USB_SSRXM_DN12
USB_SSRXP_DN12
OVERCUR1Z_TDI 3
OVERCUR2Z_TMS 3
OVERCUR3Z_TCK 3
R39
1K
C18
10uF
C2
18pF
R23
1K
C21
0.1uF
C17
0.1uF
R5
1K
0402
R48
1K
C10
0.01uF
C27
0.1uF
C15
0.001uF
R22
1K
0402
Y1
ECS-24MHZ
R45
NOPOP
C11
0.1uF
R44
NOPOP
C24
0.1uF
C9
0.001uF
R14
1K
0402
R8
4.7K
0402
J12
Header 1x2
1 2
R43
NOPOP
J9
Header 1x2
1 2
R12
1K
0402
C30
0.1uF
R42
NOPOP
R41
330 - DNI
R9
4.7K
0402
J13
1
2 3
FB1
220 @ 100MHZ
C8
0.1uF
R3
10K
0402
C14
0.1uF
C4
0.1uF
C31
10uF
R47
1K
C20
0.01uF
C16
0.01uF
D2
LED-DNI
R21
9.53K
C22
0.001uF
FB2
220 @ 100MHZ
C1
18pF
R2
90.9K
0402
C26
0.01uF
C19
0.001uF
C13
0.01uF
J8
Header 1x2
1 2
C34
0.1uF
R11
1K
0402
C6
0.001uF
C25
0.001uF
R38
1K
R7
4.7K
0402
SW2
8-POS 50-MIL SMT
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
C12
0.001uF
SW1
8-POS 50-MIL SMT
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
C5
1uF
R4
1K
0402
C33
0.01uF
U2
AT24C04
A0
1
A1
2
A2
3
GND
4
VCC 8
WP 7
SCLK 6
SDATA 5
C3
1uF
J7
Header 1x2
1 2
R10
NOPOP
R6
4.7K
0402
C28
0.001uF
R46
1K
R1 1M
C29
0.01uF
R24
1K
0402
GND2
1
J11
Header 1x2
1 2
C7
0.01uF
C32
0.001uF
R13
1K
0402 R40
330 - DNI
J10
Header 1x2
1 2
JP6
Conn 2x5 shroud
1 2
3 4
5 6
7 8
9 10
C23
0.01uF
GND1
1
R25
1K
D3
LED-DNI
U1
TUSB8044
USB_DP_DN4
24
USB_DM_DN4
25
VDD11
5
USB_SSRXP_DN4
29
USB_SSRXM_DN4
30
USB_SSTX P_DN4
26
USB_SSTX M_DN4
27
VDD11
8
VDD11
13
USB_SSRXP_DN2
14
USB_SSRXM_DN2
15
USB_SSTXP_DN2
11
USB_SSTXM_DN2
12
VDD11
21
USB_DP_DN2
9
USB_DM_DN2
10
VDD11
28
VDD33 52
OVRCUR4Z 43
OVRCUR3Z_TCK 44
OVRCUR1Z_TDI 46
OVRCUR2Z_TMS 47
AUTOENZ_HS_SUSPEND 45
VDD33
16
GRSTN 50
SCL_SMBCLK 38
SDA_SMBDAT 37
VDD11
31
PWRON4Z_BATEN4
32
SMBUSZ_SS_SUSPEND 39
VDD33 63 VDD11 51 VDD11 57
USB_DM_DN3
18 USB_DP_DN3 17
VDD33 34
USB_SSRXP_DN3
22
USB_SSRXM_DN3
23
USB_SSTX P_DN3
19
USB_SSTX M_DN3
20
USB_SSRXP_DN1
6
USB_SSRXM_DN1
7
USB_SSTXP_DN1
3
USB_SSTXM_DN1
4
USB_DM_DN1
2USB_DP_DN1
1
USB_SSTX M_UP 56
USB_SSTX P_UP 55
USB_SSRXM_UP 59
USB_SSRXP_UP 58
USB_DM_UP 54
USB_DP_UP 53
USB_VBUS 48
XO 61
XI 62
USB_R1 64
NC 60
FULLPWRMGMTZ_SMBA1_SS_UP 40
PWRCTL_POL_TDO 41
GANGED_SMBA2_HS_UP 42
PWRON1Z_BATEN1 36
PWRON2Z_BATEN2 35
PWRON3Z_BATEN3 33
TEST_TRSTz 49
PPAD 65
Copyright © 2017, Texas Instruments Incorporated
9
SLLU261A–April 2017–Revised February 2019
Submit Documentation Feedback Copyright © 2017–2019, Texas Instruments Incorporated
TUSB8044RGC REVD EVM Schematics
Appendix B
SLLU261A–April 2017–Revised February 2019
TUSB8044RGC REVD EVM Schematics
Figure 2 through Figure 4 the TUSB8044RGC REVD EVM schematics.
Figure 2. TUSB8044RGC REVD EVM Top Layer Layout

CAP_DN_TXM1
CAP_DN_TXP1
CAP_DN_TXM2
CAP_DN_TXP2
CAP_UP_TXM
CAP_DN_TXM4
CAP_DN_TXP4
CAP_UP_TXP
CAP_DN_TXM3
CAP_DN_TXP3
DN4_VBUS
VBUS_DS4
DN3_VBUSDN1_VBUS
VBUS_DS3VBUS_DS1
VBUS_DS2
DN2_VBUS
USB_DM_DN4 1
USB_SSRXP_DN2 1
USB_DP_DN4 1
USB_SSRXM_DN2 1
USB_SSRXP_UP 1
USB_SSRXN_UP 1
USB_SSTXP_UP 1
USB_SSTXM_UP 1
USB_DM_DN1 1
USB_DP_DN1 1
USB_SSTXP_DN1 1
USB_SSTXM_DN1 1
USB_SSRXP_DN1 1
USB_DM_UP 1
USB_SSRXM_DN1 1
USB_DM_DN2 1
USB_DP_DN2 1
USB_DP_UP 1
USB_SSTXP_DN2 1
USB_SSTXM_DN2 1
USB_SSRXP_DN4 1
USB_SSRXM_DN4 1
USB_SSTXP_DN4 1
USB_SSTXM_DN4 1
DN4_VBUS 3
DN1_VBUS 3
DN2_VBUS 3
USB_SSRXP_DN3 1
USB_SSRXM_DN3 1
USB_DM_DN3 1
USB_DP_DN3 1
USB_SSTXP_DN3 1
USB_SSTXM_DN3 1
DN3_VBUS 3
USB_VBUS_UP 1
R19
1M
0402
C54 0.1uF 0201
C57
0.001uF
J4
USB3_TYPEA_CONNECTOR
VBUS 1
DM 2
DP 3
GND 4
SSRXN 5
SSRXP 6
GND 7
SSTXN 8
SSTXP 9
SHIELD0 10
SHIELD1 11
FB5
220 @ 100MHZ J5
USB3_TYPEA_CONNECTOR
VBUS 1
DM 2
DP 3
GND 4
SSRXN 5
SSRXP 6
GND 7
SSTXN 8
SSTXP 9
SHIELD0 10
SHIELD1 11
C42 0.1uF 0201 C43 0.1uF 0201
C50
0.1uF
C46
0.1uF
FB6
220 @ 100MHZ
C40
0.1uF
C47
0.001uF
R15
1M
0402
C58
0.1uF
R17
1M
0402
C39
0.001uF
R20
1M
0402
C48
0.1uF
C44 0.1uF 0201
C37 0.1uF 0201
J3
USB3_TYPEA_CONNECTOR
VBUS 1
DM 2
DP 3
GND 4
SSRXN 5
SSRXP 6
GND 7
SSTXN 8
SSTXP 9
SHIELD0 10
SHIELD1 11
J2
USB3_TYPEA_CONNECTOR
VBUS 1
DM 2
DP 3
GND 4
SSRXN 5
SSRXP 6
GND 7
SSTXN 8
SSTXP 9
SHIELD0 10
SHIELD1 11
R18
1M
0402
C59
0.001uF
C38
0.1uF
C51
0.1uF
R16
330
0402
C41
0.1uF
FB4
220 @ 100MHZ
C52 0.1uF 0201
C49
0.001uF
C53 0.1uF 0201
C45 0.1uF 0201
D1
LED Green 0805
C55 0.1uF 0201
FB3
220 @ 100MHZ
C56
0.1uF
C35
10uF
C36 0.1uF 0201
J1
USB3_TYPEB_CONNECTOR
VBUS 1
DM 2
DP 3
GND 4
SSTXN 5
SSTXP 6
GND 7
SSRXN 8
SSRXP 9
SHIELD0 10
SHIELD1 11
Copyright © 2017, Texas Instruments Incorporated
Appendix B www.ti.com
10 SLLU261A–April 2017–Revised February 2019
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Copyright © 2017–2019, Texas Instruments Incorporated
TUSB8044RGC REVD EVM Schematics
Figure 3. USB Port Connections