Linear Technology DC2541A Quick setup guide

1
dc2541af
DEMO MANUAL DC2541A
Description
LTC4279
Single Port PoE/PoE+/LTPoE++
PSE Controller
Demonstration circuit 2541A features the LT C
®
4279,
an autonomous single port Power Sourcing Equipment
(PSE) controller for use in IEEE 802.3at Type 1, Type
2 and LTPoE++
®
compliant Power over Ethernet (PoE)
systems. The LTC4279 simplifies IEEE and LTPoE++ PSE
implementation, requiring only a 45-57V supply and a
small number of passive support components.
The DC2541A provides jumper selections for setting the
LTC4279 power mode, LEGACY pin, DUALPD pin, and
L, LT, LTC, LTM, Linear Technology, LTPoE++ and the Linear logo are registered trademarks of
Linear Technology Corporation. All other trademarks are the property of their respective owners.
MID pin, as well as the PSE output 2-pair or 4-pair mode.
A pushbutton switch resets the LTC4279. LEDs indicate
main supply power and output power are up. The Data-In
RJ45 connects to a PHY data source and the Data-and-
Power-Out RJ45 connects to a PD.
Design files for this circuit board are available at
http://www.linear.com/demo/DC2541A
Figure 1. DC2541A Connection Diagram
DC2541 F01
DATA AND POWER
OUT TO PD
MAIN
PS
DATA IN
FROM PHY
+
–
RJ45
RJ45

2
dc2541af
DEMO MANUAL DC2541A
Quick start proceDure
Demonstration circuit 2541A is easy to set up for evaluat-
ing the performance of the LTC4279. Refer to Figure 1 for
proper measurement equipment setup, Table 1 for jumper
and supply settings, and follow the procedure below.
1) Select the evaluation PSE Type as shown in Table 1 and
set the jumpers accordingly.
2) Connect a power supply with the positive to AGND (J3)
and negative to VEE (J4).
3) Ramp up the supply to the recommended values speci-
fied in Table 1 for the configured mode. VEE LED1 will
turn on when the board is powered.
4) Connect test measurement probes across VPORT+
and VPORT– for 2-pair measurements, and optionally
additional test measurement probes across DATA2+
and DATA2– for 4-pair measurements.
5) Connect a PD with a Cat5e Ethernet cable to RJ45
connector J1. PORT PWR LED2 will turn on if the port
power is on.
6) Connect a 10BASE-T, 100BASE-T or 1000BASE-T PHY
data source with an Ethernet cable to J2 for data testing
(optional).
Table 1. Example Jumper Settings and VEE Supply Range for the Various PSE Types (Note 1)
PSE TYPE
POWER MODE
(JP6)
PORT+ (JP1)/
PORT– (JP2)
MID
(JP3)
DUALPD
(JP4)
LEGACY
(JP5) MAIN PS
IEEE 802.3at Type 1
(13W)
TYPE 1 (13W) 2-PAIR LO/HI LO LO 45V to 57V
Legacy TYPE 1 (13W) 2-PAIR LO/HI LO HI 48V (Typical)
IEEE 802.3at Type 2
(25.5W)
TYPE 2 (25.5W) 2-PAIR LO/HI LO LO 51V to 57V
LTPoE++ (38.7W) LTPoE++ (38.7W) 4-PAIR LO/HI LO LO 51V to 57V
LTPoE++ (52.7W) LTPoE++ (52.7W) 4-PAIR LO/HI LO LO 51V to 57V
Dual PD LTPoE++ (52.7W) 4-PAIR LO/HI HI LO 51V to 57V
LTPoE++ (70W) LTPoE++ (70W) 4-PAIR LO/HI LO LO 54.75V to 57V
LTPoE++ (90W) LTPoE++ (90W) 4-PAIR LO/HI LO LO 54.75V to 57V
Note 1: The application is not limited to these settings. See the LTC4279 data sheet pin descriptions.

3
dc2541af
DEMO MANUAL DC2541A
operation
Power Control
The primary function of the LTC4279 is to control the de-
livery of power to the PSE port. It does this by controlling
the gate drive voltage of an external power MOSFET (Q1)
while monitoring the current via an external sense resistor
(RS1) and the output voltage at the OUT pin. This circuitry
serves to couple the raw VEE input supply to the port in
a controlled manner that satisfies the PD’s power needs
while minimizing both power dissipation in the MOSFET
and disturbances on the VEE backplane.
Power Mode
The LTC4279 is a fully autonomous PSE controller and
provides a complete PSE solution for detection, classifi-
cation and powering of PD devices in an IEEE 802.3 or
L
TPoE++ compliant system. The LTC4279 will power all
valid PDs with ICUT and ILIM values based on the PWR-
MODE pin and the PD classification result. The LTC4279
will remove power automatically if the port generates a
current cutoff or limit fault. The LTC4279 senses removal
of a PD and turns off power when the PD is disconnected.
Internal control circuits comply with IEEE timing and
electrical parameters.
The resistance value at the LTC4279 PWRMODE pin to
VEE sets the LTC4279 maximum delivered power. On the
DC2541A, the PWRMODE pin is connected with a 10k
resistor (RM6) to VEE. The POWER MODE jumper (JP6)
selects various resistances in parallel with RM6 to match
therecommendedRPM valuespecifiedintheLTC4279data
sheet. The DC2541A can be set to 13W (IEEE 802.3af),
25.5W (IEEE 802.3at), LTPoE++ 38.7W, 52.7W, 70W, or
90W maximum power levels and defaults to the LTPoE++
90W power level if the shunt at JP6 is removed.
The PWRMODE pin configures the PSE’s maximum avail-
able power. Based on thePD Class result, thePD is allocated
power if sufficient power is available. The DC2541A does
not support the LTC4279 UltraPWR mode. Refer to the
DC2579A for LTC4279 UltraPWR evaluation.
Power Supply Range
The power supply voltage to the DC2541A must be set to
meet the requirements of the PSE Type as listed in Table1.
The IEEE standard and LTPoE++ specification have defined
voltage ranges for the PSE output. The power supply
voltage to a legacy-configured PSE is dependent on the
legacy PD and system requirements.
Data In/Data and Power Out
The DC2541A can be set up ina midspan PSE configuration
for data and power evaluation. A PD is connected with a
Cat5e cable to DATA AND POWER OUT RJ45 connector
(J1). Power is injected on to the Ethernet lines through
the center taps of the 1000BASE-T Ethernet transformer
(T1). A 10BASE-T, 100BASE-T or 1000BASE-T PHY data
source is connected with an Ethernet cable to DATA IN
RJ45 connector J2 for optional data testing. Data is passed
from J2 through to J1 with power.
LED Indicators
The VEE LED1 across the main power supply input indi-
cates the DC2541A is powered. The PORT PWR LED2 is
connected from the AGND_P node to the LTC4279 LED
open-drain output pin. The LED pin pulls low and turns on
LED2 when the port is powered. Each LED has a current
limiting resistor in series.
2-Pair vs. 4-Pair
The DC2541A jumpers PORT+ (JP1) and PORT–(JP2)
select whether power is applied on only 2, or all 4, of the
Ethernetcable pairs.Theshunt settingsatJP1 andJP2must
match. Table 1 lists the JP1 and JP2 settings as a function
of PSE Type. If JP1 and JP2 are configured for 2-PAIR,
power is applied with the voltage high side connected to
Ethernet pair 1/2 and low side connected to Ethernet pair
3/6. If JP1 and JP2 are configured for 4-PAIR, power is
applied in parallel with the 2-PAIR configuration, and with
the voltage high side connected to Ethernet pair 4/5 and
the low side connected to Ethernet pair 7/8.

4
dc2541af
DEMO MANUAL DC2541A
operation
Test Turrets
Test turrets on the DC2541A are provided to connect test
measurement equipment across the main supply (AGND
andVEE), 2-pair configured output(VPORT+andVPORT–),
and 4-pair configured output (VPORT+, VPORT–, DATA2+
and DATA2–). If using an oscilloscope, connect the scope
probe ground leads to a common point or use isolated
differential probes for multiple channels with different
ground references.
RESET
The DC2541Apushbuttonswitch(SW1)momentarilycon-
nects the LTC4279 RESET pin to VEE when pushed and
released. When the RESET pin is logic low, the LTC4279
is held inactive with the port off. When the RESET pin is
released logic high, the LTC4279 restarts normal opera-
tion. An external RC network at the LTC4279 RESET pin
on the DC2541A provides a power turn-on delay.
MID
The DC2541A MID jumper (JP3) ties the LTC4279 MID
pin high to the AGND_P node or low to VEE. When MID
is high, the LTC4279 acts as a midspan device with the
Midspan Mode Detection Backoff timer enabled. When
MID is low, the LTC4279 acts as an endpoint device with
the Midspan Mode Detection Backoff timer disabled. The
LTC4279 MID pin is internally pulled down to VEE if the
shunt at JP3 is removed.
DUALPD
The DC2541A DUALPD jumper (JP4) ties the LTC4279
DUALPD pin high to the AGND_P node or low to VEE.
When DUALPD is high, the LTC4279 detects, classifies
and powers dual-signature PDs. Valid dual-signature PDs
are present when two Type 2 PD signatures are detected
and classified in parallel. PWRMODE must be set to 52.7W
or greater. When the LTC4279 DUALPD pin is low, dual-
signature PD support is disabled. The LTC4279 DUALPD
pin is internally pulled down to VEE if the shunt at JP4 is
removed.Warning:Dual-signature detect, class and power
on is not IEEE 802.3at compliant.
LEGACY
The DC2541A LEGACY jumper (JP5) ties the LTC4279
LEGACYpin high to the AGND_Pnode for enabling LEGACY
mode, or low to VEE for disabling LEGACY mode. See the
LTC4279 data sheet for further details on LEGACY mode.
The LTC4279 LEGACY pin is internally pulled down to VEE
if the shunt at JP5 is removed. Warning:Legacy detect is,
by definition, not IEEE compliant.
Logic Pin Protection
The DC2541A has a 100Ω resistor (R6, R7 and R8) in
series from each of the LTC4279 logic pins (MID, DUALPD
and LEGACY) and to their respective jumpers (JP3, JP4
and JP5). These resistors provide current limit protection
against high voltage transients when moving the shunt
position at the jumper. In the end application, if the logic
pin is hard tied high to the LTC4279 AGND pin or hard
tied low to VEE, this resistor is not required.
Fuse
A fuse is not a requirement of the LTC4279, however, some
end applications may require one to meet safety require-
ments. The DC2541A fuse (F1) provides a suggested fuse
location and component value.
Surge Protection
Ethernet ports can be subject to significant cable surge
events. To keep PoE voltages below a safe level and protect
the application againstdamage, protection componentsare
required at the main supply, at the LTC4279 supply pins,
and at the output port. On the DC2541A, a bulk transient
voltage suppression diode (D2) and a bulk capacitance
(C5) are across the main PoE supply and absorb a majority
of the surge energy coming in to the LTC4279. In the end

5
dc2541af
DEMO MANUAL DC2541A
operation
application, these should be sized to accommodatesystem
surge level requirements. Across the LTC4279 AGND pin
and VEE pin are a local SMAJ58A, 58V TVS (D1) and a
1μF, 100V bypass capacitor (C4) component, both placed
close to the LTC4279 pins. An S1B standard rectifier diode
(100V, 1A) provides reverse polarity protection at the port
output as shown at D3 on the DC2541A.
Kelvin Sense
Proper connection of the port current sense lines is impor-
tant for current threshold accuracy and IEEE compliance.
On the DC2541A, the LTC4279 VSSK pin is connected to
a Kelvin sense trace that leads to the sense resistor pad
as shown in Figure 2 and is not connected directly to
VEE copper areas. Similarly, the LTC4279 SENSE pin is
connected to a Kelvin sense trace that leads to the sense
resistor pad and is not connected in the power path be-
tween the sense resistor and the MOSFET. The LTC4279
VEE pins and the sense resistor VEE pad connect to the
VEE copper areas.
Figure 2. DC2541A Kelvin Sense
Recommended Component Selection
The DC2541A power path components (RS1, Q1, and
T1) are chosen to accommodate all power levels up to
LTPoE++ 90W. In the end application, these components
can be optimized for the respective power level as listed
in Table 2.
Table 2. Recommended Power Path and Setting Components for the Various Power Levels
Power Level
Type 1
(13W)
Type 2
(25.5W)
LTPoE++
(38.7W)
LTPoE++
(52.7W)
LTPoE++
(70W)
LTPoE++
(90W)
Power Mode
Resistor (RPM)
2.37k, 1% 3.32k, 1% 4.64k, 1% 5.90k, 1% 7.87k, 1% 10.0k, 1%
Sense Resistor
(RS1)
0.1Ω, 1%, 1/10W,
±200ppm/°C
0.1Ω, 1%, 1/10W,
±200ppm/°C
0.1Ω, 1%, 1/4W,
±200ppm/°C
0.1Ω, 1%, 1/2W,
±200ppm/°C
0.1Ω, 1%, 1/2W,
±200ppm/°C
0.1Ω, 1%, 1W,
±200ppm/°C
Ethernet
Transformer (T1)
Würth 749023015 Würth 749022017 Würth 749022016,
Coilcraft ETH1-460L
Würth 749022016,
Coilcraft ETH1-460L
Würth 749022016,
Coilcraft ETH1-460L
Würth 749022016,
Coilcraft ETH1-460L
MOSFET (Q1) NXP
PSMN075-100MSE
NXP
PSMN075-100MSE
NXP
PSMN040-100MSE
NXP
PSMN040-100MSE
NXP
PSMN040-100MSE
NXP
PSMN040-100MSE

6
dc2541af
DEMO MANUAL DC2541A
pcB Layout
Top Assembly
Top Layer

7
dc2541af
DEMO MANUAL DC2541A
Inner Layer 2
Inner Layer 3

8
dc2541af
DEMO MANUAL DC2541A
Bottom Layer
Bottom Assembly

9
dc2541af
DEMO MANUAL DC2541A
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.
schematic Diagram
5 5
4 4
3 3
2 2
1 1
D
D
C
C
B
B
A
A
3. FOR TEMPERATURE SENSITIVE 90W APPLICATIONS, TWO OF THE 749012013 MAY BE USED AS AN ALTERNATE TO T1 WHICH HAS A HIGHER CURRENT RATING
MAIN PS INPUTS
2-PAIR
4-PAIR
(+)
(55V TO 57V)
TYPE 1 (13W)
T1: WURTH 749022016 COILCRAFT ETH1-460L
2. INSTALL SHUNTS AS SHOWN. 1. ALL RESISTORS ARE IN OHMS, 0603. ALL CAPACITORS ARE IN MICROFARADS, 0603. NOTE: UNLESS OTHERWISE SPECIFIED
DATA IN
TYPE 2 (25.5W) LTPoE++ 38.7W LTPoE++ 52.7W
DATA AND POWER OUT
LTPoE++ 70W
TYPE 1
TYPE 2
LTPoE++
DUALPD
LTPoE++ 90W
MAXIMUM PD INPUT POWER
TYPE 1 (13W)
TYPE 2 (25.5W)
LTPoE++ 38.7W
LTPoE++ 52.7W
LTPoE++ 70W LTPoE++ 90W
EFFECTIVE R_PM
2.37k
3.32k
4.64k
5.90k 7.87k 10.0k
{}
{}
(-)
LEGACY
VPORT+
LED
RESET_N
SENSE
MID
AGND_P
GATE
RESET_N MID DUALPD LEGACY PWRMODE
DATA2-
DUALPD
DATA2+
VPORT-
AGND_P
PWRMODE
VEE
VEE
VEE
VEEVEE
REVISION HISTORY DESCRIPTION DATEAPPROVEDECO REV
DILIAN R.PRODUCTION2 10-13-16
__
REVISION HISTORY DESCRIPTION DATEAPPROVEDECO REV
DILIAN R.PRODUCTION2 10-13-16
__
REVISION HISTORY DESCRIPTION DATEAPPROVEDECO REV
DILIAN R.PRODUCTION2 10-13-16
__
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
2
Thursday, October 13, 2016
11
SINGLE PORT PoE/PoE+/LTPoE++ PSE CONTROLLER
KIM T.
DILIAN R.
N/A
LTC4279IUFD
DEMO CIRCUIT 2541A
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
2
Thursday, October 13, 2016
11
SINGLE PORT PoE/PoE+/LTPoE++ PSE CONTROLLER
KIM T.
DILIAN R.
N/A
LTC4279IUFD
DEMO CIRCUIT 2541A
SIZE DATE:
IC NO. REV.
SHEET OF
TITLE:
APPROVALS
PCB DES.
APP ENG.
TECHNOLOGY Fax: [phone]
Milpitas, CA 95035 Phone: [phone] McCarthy Blvd. LTC Confidential-For Customer Use Only
CUSTOMER NOTICE
LINEAR TECHNOLOGY HAS MADE A BEST EFFORT TO DESIGN A CIRCUIT THAT MEETS CUSTOMER-SUPPLIED SPECIFICATIONS; HOWEVER, IT REMAINS THE CUSTOMER'S RESPONSIBILITY TO VERIFY PROPER AND RELIABLE OPERATION IN THE ACTUAL APPLICATION. COMPONENT SUBSTITUTION AND PRINTED CIRCUIT BOARD LAYOUT MAY SIGNIFICANTLY AFFECT CIRCUIT PERFORMANCE OR RELIABILITY. CONTACT LINEAR TECHNOLOGY APPLICATIONS ENGINEERING FOR ASSISTANCE. THIS CIRCUIT IS PROPRIETARY TO LINEAR TECHNOLOGY AND
SCHEMATIC
SUPPLIED FOR USE WITH LINEAR TECHNOLOGY PARTS.
SCALE = NONE
www.linear.com
2
Thursday, October 13, 2016
11
SINGLE PORT PoE/PoE+/LTPoE++ PSE CONTROLLER
KIM T.
DILIAN R.
N/A
LTC4279IUFD
DEMO CIRCUIT 2541A
RM4 14.3k
J2
RJ45, WE-615008142621
1 2 3 4 5 6 7 8
9
10
E3
AGND
E5
DATA2+
CT3 0.01uF 0805 200V
C2 1000pF 2kV 1808
RX1 75
RM2 4.99k
C1 1000pF 2kV 1808
LED1
YELLOW
VEE
2 1
E1
VPORT+
RM3 8.66k
T1
2
223 24 23
1 5 4 6 8 7 9
11 10 12
20 21 19 17 18 16 14 15 13
C3
2200pF
2kV
1812
RT1 75
C7 0.22uF 100V X7R 0805
R4 12k 1206 1/2W
RX4 75
RT3 75
JP5
HD1X3-079
LEGACY
HI
LO
1 3 2
CT1 0.01uF
0805 200V
RS1
0.1
1W
1206
U1
LTC4279
AGND 9
VEE
4
VSSK
5
VEE
21
SENSE
6
GATE
7
OUT
8
MID
19
RESET
18 LED 10
LEGACY
15 DNC 11
DUALPD
16
DNC 20 DNC 17 DNC 14 DNC 12 DNC 3 DNC 2 DNC 1
PWRMODE
13
SW1
RESET
1 2
X1
P1
C6
0.22uF
100V
X7R
0805
D2
SMBJ58A
12
R3 12k 1206 1/2W
E6
DATA2-
JP1 HD1X3-079
PORT+
1
3
2
J1
RJ45, WE-615008142621
1 2 3 4 5 6 7 8
9 10
J4
VEE
C4 1uF 1206 100V
CT2 0.01uF
0805 200V
Q1
PSMN040-100MSE
2
4
7
3 1 6
8 5
JP2 HD1X3-079
PORT-
1
3
2
RM6 10.0k
R5
100k
D3 S1B
2 1
E2
VPORT-
JP3
HD1X3-079
MID
HI
LO
1 3 2
JP4
HD1X3-079
DUALPD
HI
LO
1 3 2
CT4 0.01uF 0805 200V
JP6
HD2X6-079
POWER
MODE
1 3 5 6
4 2
7 98
10
11 12
R7 100
LED2
GREEN PORT PWR
2 1
J3
AGND
F1
C1Q 3
1206
3A
R6 100
RM5 36.5k
R10 10 0805
D1
SMAJ58A
12
RT4 75
RX2 75
RX3 75
RT2 75
R2 0
E4
VEE
RG1 200
R1 0
R8 100
RM1 3.09k
+
C5 22uF
100V
CE-KX

10
dc2541af
DEMO MANUAL DC2541A
Linear Technology Corporation
1630 McCarthy Blvd., Milpitas, CA 95035-7417
[phone] ●FAX: [phone] ●www.linear.com
© LINEAR TECHNOLOGY CORPORATION 2017
LT 0117 • PRINTED IN USA
DEMONSTRATION BOARD IMPORTANT NOTICE
Linear Technology Corporation (LTC) provides the enclosed product(s) under the following AS IS conditions:
This demonstration board (DEMO BOARD) kit being sold or provided by Linear Technology is intended for use for ENGINEERING DEVELOPMENT
OR EVALUATION PURPOSES ONLY and is not provided by LTC for commercial use. As such, the DEMO BOARD herein may not be complete
in terms of required design-, marketing-, and/or manufacturing-related protective considerations, including but not limited to product safety
measures typically found in finished commercial goods. As a prototype, this product does not fall within the scope of the European Union
directive on electromagnetic compatibility and therefore may or may not meet the technical requirements of the directive, or other regulations.
If this evaluation kit does not meet the specifications recited in the DEMO BOARD manual the kit may be returned within 30 days from the date
of delivery for a full refund. THE FOREGOING WARRANTY IS THE EXCLUSIVE WARRANTY MADE BY THE SELLER TO BUYER AND IS IN LIEU
OF ALL OTHER WARRANTIES, EXPRESSED, IMPLIED, OR STATUTORY, INCLUDING ANY WARRANTY OF MERCHANTABILITY OR FITNESS
FOR ANY PARTICULAR PURPOSE. EXCEPT TO THE EXTENT OF THIS INDEMNITY, NEITHER PARTY SHALL BE LIABLE TO THE OTHER FOR
ANY INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES.
The user assumes all responsibility and liability for proper and safe handling of the goods. Further, the user releases LTC from all claims
arising from the handling or use of the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all
appropriate precautions with regard to electrostatic discharge. Also be aware that the products herein may not be regulatory compliant or
agency certified (FCC, UL, CE, etc.).
No License is granted under any patent right or other intellectual property whatsoever. LTC assumes no liability for applications assistance,
customer product design, software performance, or infringement of patents or any other intellectual property rights of any kind.
LTC currently services a variety of customers for products around the world, and therefore this transaction is not exclusive.
Please read the DEMO BOARD manual prior to handling the product. Persons handling this product must have electronics training and
observe good laboratory practice standards. Common sense is encouraged.
This notice contains important safety information about temperatures and voltages. For further safety concerns, please contact a LTC application
engineer.
Mailing Address:
Linear Technology
1630 McCarthy Blvd.
Milpitas, CA 95035
Copyright © 2004, Linear Technology Corporation