LB-Link BL-M8821CU1 User manual

Product Specification
Revision V1.1
Date 2019-07-15
Model Name BL-M8821CU1
Product Name IEEE 802.11a/b/g/n/ac(1T1R) USB WIFI+BT Combo Module
Bilian Approve Field
Engineer QC Sales
Can Zhang
Customer Approve Field
Engineer QC Manufactory Purchasing
Shenzhen Bilian Electronic Co., Ltd
Address: 10-11F, Building A1, Huaqiang idea park, Guangming district, Shenzhen.Guangdong, China
Homepage: www.b-link.net.cn

0
Table of Contents
Revision History ......................................................................................... 1
1. Introduction .............................................................................................................. 1
1.1 General Description ............................................................................................ 1
1.2 Features .............................................................................................................. 1
1.3 Applications ......................................................................................................... 2
2. Functional Block Diagram .................................................................................... 2
3. Product Technical Specifications ........................................................................ 2
3.1 General Specifications ........................................................................................ 2
3.2 DC Power Consumption ...................................................................................... 3
3.3 RF Specifications ................................................................................................ 4
4. Pin Assignments ..................................................................................................... 6
5. Application Information ......................................................................................... 7
5.1 Typical Application Circuit ................................................................................... 7
6. Mechanical Specifications .................................................................................... 9
7. Others ....................................................................................................................... 9
7.1 Package Information ........................................................................................... 9
7.2 Storage Temperature and Humidity .................................................................. 10
7.3 Recommended Reflow Profile ........................................................................... 10

1
Revision History
Date Document
Revision
Product
Revision Description
2017/04/06 0.1 V0.1 Preliminary release
2017/09/26 1.0 V1.0 Update the product pictures
2019/06/18 1.1 V1.1 Revise the descriptive error and the dimension of product
1. Introduction
1.1 General Description
BL-M8821CU1 is the module designed by a highly integrated IEEE 802.11a/b/g/n/ac MAC/Baseband/RF WLAN
and Bluetooth Baseband/RF single chip. It combines a WLAN MAC, a 1T1R capable WLAN baseband, BT
Protocol (LM , LL and LE),BT Baseband, modem, and WLAN/BT RF in a single chip. The module provides a
complete solution for a high-performance wireless LAN and Bluetooth device. The BT controller supports BT 4.2
system and compatibles Bluetooth 2.1+EDR.
Figure 1 Top View Figure 2 Bottom View
Note: The above pictures are for reference only
1.2 Features
 Operating Frequencies :
 Host Interface is USB 2.0 for WLAN and BT controller
 IEEE Standards : IEEE 802.11a/b/g/n/ac
 Wireless data rate can reach up to 433.3Mbps
 Bluetooth Low Energy Support
 Connect to external antenna through the half hole
 Power Supply:3.3V±0.2V
BT:2.402~2.48GHz(BT)
2.4GWIFI:2.412~2.472GHz(USA 11Channels, Europe and others 13 channels)
B5GWIFI:5.18~5.24GHz/5.745~5.825GHz

2
1.3 Applications
 MID
 IP Camera
 STB
 Smart TV
 E-book
 Other devices which need to be supported by wireless network
2. Functional Block Diagram
Figure 3 BL-M8821CU1 block diagram
3. Product Technical Specifications
3.1 General Specifications
Item Description
Product Name BL-M8821CU1
Main Chip RTL8821CU-CG
Host Interface USB 2.0
IEEE Standards IEEE 802.11a/b/g/n/ac
Operating Frequencies BT:2.402~2.48GHz(BT)
2.4GWIFI:2.412~2.472GHz(USA 11Channels, Europe and others 13 channels)
B5GWIFI:5.18~5.24GHz/5.745~5.825GHz

3
Modulation
WiFi:
802.11b: CCK, DQPSK, DBPSK
802.11a/g: 64-QAM,16-QAM, QPSK, BPSK
802.11n: 64-QAM,16-QAM, QPSK, BPSK
802.11ac: 256-QAM,64-QAM,16-QAM, QPSK, BPSK
BT:
8DPSK,π/4DQPSK,GFSK
Working Mode Infrastructure, Ad-Hoc
Wireless Data Rate
WiFi:
802.11b: 1, 2, 5.5, 11Mbps
802.11a/g: 6, 9, 12, 18, 24, 36, 48, 54Mbps
802.11n: HT20 reach up to72.2Mbps, HT40 reach up to150Mbps
802.11ac: MCS0~8, VHT20 reach up to 173.3Mbps, VHT40 reach up to 239Mbps,
MCS0~9, VHT80 reach up to 433.3Mbps
BT:
1Mbps for Basic Rate
2,3 Mbps for Enhanced Date Rate
Rx Sensitivity -96dBm (Min)
Antenna Type Connect to external antenna through the half hole
Dimension(L*W*H) 13.0*12.2*1.5mm (L*W*H) ，Tolerance: ±0.15mm
Power Supply 3.3V±0.2V
Power Consumption Standby [email protected]V (Max)
TX mode 420 [email protected] (Max)
Clock Source 40MHz
Working Temperature -10°C to +50°C
Storage Temperature -40°C to +70°C
ESD CAUTION: Although this module is designed to be as robust as possible, Electrostatic Discharge (ESD)
can damage this module. It must be protected from ESD at all times and handled under the protection of ESD.
3.2 DC Power Consumption
Vcc=3.3V，Ta = 25 °C，unit: mA
Supply current Typ. Max
Standby (RF disabled) 95 105
802.11b 1Mbps 11Mbps
Supply current Typ. Max. Typ. Max.
TX mode 341 368 331 381
Rx mode 93 126 92 128

4
802.11g 6Mbps 54Mbps
Supply current Typ. Max. Typ. Max.
TX mode 325 388 240 376
Rx mode 85 112 86 116
802.11n HT20 MCS0 MCS7
Supply current Typ. Max. Typ. Max.
TX mode 320 380 239 372
Rx mode 87 112 88 116
802.11n HT40 MCS0 MCS7
Supply current Typ. Max. Typ. Max.
TX mode 286 352 215 360
Rx mode 89 116 90 120
802.11a 6Mbps 54Mbps
Supply current Typ. Max. Typ. Max.
TX mode 340 420 270 380
Rx mode 90 120 91 124
802.11n HT40(5G) MCS0 MCS7
Supply current Typ. Max. Typ. Max.
TX mode 320 392 240 384
Rx mode 92 124 93 128
802.11ac MCS0 MCS9
Supply current Typ. Max. Typ. Max.
TX mode 281 352 254 368
Rx mode 111 144 110 150
3.3 RF Specifications
TX Power
2.4GWIFI:15.95dBm(Max.)
TX Constellation Error(EVM)
2.4G:
802.11b: <-22dB@11Mbps
802.11g: <-28dB@54Mbps
5.2GWIFI:12.88dBm(Max.)
5.8GWIFI:10.95dBm(Max.)
2.4GBT:4.93dBm(Max.)
2.4GBLE:3.84dBm(Max.)

5
802.11n-HT20: <[email protected]
802.11n-HT40:< -28dB@150Mbps
5G:
802.11a: <-28dB@54Mbps
802.11n-HT20: <[email protected]
802.11n-HT40: <-28dB@150Mbps
802.11ac-VHT80:< -32dB@433Mbps
Receiver Minimum Input Sensitivity@PER
1Mbps: -96dBm@PER<8%;
11Mbps:-90dBm@PER<8%;
54Mbps:-72dBm@PER<10%;
150Mbps:-69dBm@PER<10%;
433Mbps:-59dBm@PER<10%;

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4. Pin Assignments
Figure 4 Pin Assignments (Top view)
The following signal type codes are used in the tables:
I:Input O:Output
O/D: Open Drain P:Power Pin
Pin No： Pin Name Type Description
1 GND P Ground
2 RF_0 I/O 2G&5G WIFI and BT ANT
3 NC / /
4 GND P Ground

7
5、6、7、8 NC / Floating(Don’t connected to ground
9 BT_WAKE_HOST O Bluetooth device to wake up HOST
10 HOST_WAKE_BT I HOST to wake up Bluetooth device
11 VIN P VDD 3.3V Power Supply
12 USB_DM I/O USB Transmitter/Receiver Differential Pair
13 USB_DP I/O USB Transmitter/Receiver Differential Pair
14 GND P ground
15 3DD_SYNC I/O PCM_OUT/GPIO1
16 WL_DIS I WIFI DISABLE （Low potential）
17 BT_DIS I BT DISABLE （Low potential）
18 CHIP_EN I High asserting for use/ Low asserting reset
19 HST_WAKE_WL I HOST to wake up WIFI
20 WL_WAKE_HST O WIFI to wake up HOST
21 WPS I/O WPS Switch (GPIO)
22 LED I/O External LED Control(GPIO)
5. Application Information
5.1 Typical Application Circuit
LED Circuit
WPS Circuit

8
RF reference circuit
Figure 5 Typical application circuit
NOTE：
1、RF trace need to keep 50 ohm impedance.
2、USB differential pair need to keep 90ohm impedance.
3、C1 10uF closed to Module pin 11
4、Reserved 0R between Module pin 16 pin 17 and Host
5、LED active low.
Recommended alternatives or upgrades
If you just use WiFi (only connect the pin 1/2/11/12/13/14), you can replace it with the following solution:
BL-R7601MU2 / BL-R8188EU1 / BL-R8801MU2
Details please refer to : www.b-link.net.cn

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6. Mechanical Specifications
Module dimension: Typical ( L*W * H): 13.0mm*12.2mm*1.50mm Tolerance : +/-0.15mm
Figure 6 Module dimension
7. Others
7.1 Package Information
Figure 7 Package Information

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7.2 Storage Temperature and Humidity
1. Storage Condition: Moisture barrier bag must be stored under 30℃, humidity under 85% RH.
The calculated shelf life for the dry packed product shall be a 12 months from the bag seal date.
Humidity indicator cards must be blue, <30%.
2. Products require baking before mounting if humidity indicator cards reads > 30% temp < 30℃,
humidity < 70% RH, over 96 hours.
Baking condition: 125℃, 12 hours.
Baking times: 1 time.
7.3 Recommended Reflow Profile
Reflow soldering shall be done according to the solder reflow profile,Typical Solder Reflow Profile is
illustrated in Figures 8. The peak temperature is 245℃.
Figure 8 Typical Solder Reflow Profile

FCC Statement
This device complies with part 15 of the FCC rules. Operation is subject to the following two conditions: (1) thi
s device may not cause harmful interference, and (2) this device must accept any interference received, incl
uding interference that may cause undesired operation.
Changes or modifications not expressly approved by the party responsible for compliance could void the user’
s authority to operate the equipment.
NOTE: This equipment has been tested and found to comply with the limits for a Class B digital device, pursua
nt to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful inte
rference in a residential installation. This equipment generates uses and can radiate radio frequency energy a
nd, if not installed and used in accordance with the instructions, may cause harmful interference to radio com
munications. However, there is no guarantee that interference will not occur in a particular installation. If this
equipment does cause harmful interference to radio or television reception, which can be determined by turn
ing the equipment off and on, the user is encouraged to try to correct the interference by one or more of the
following measures:
‐Reorient or relocate the receiving antenna.
‐Increase the separation between the equipment and receiver.
‐Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
‐Consult the dealer or an experienced radio/TV technician for help important announcement
Important Note:
Radiation Exposure Statement
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This
equipment should be installed and operated with minimum distance
0cm between the radiator and your body.
This transmitter must not be co-located or operating in conjunction with any other antenna or transmitter.
Country Code selection feature to be disabled for products marketed to the US/Canada.
This device is intended only for OEM integrators under the following conditions:
1. The antenna must be installed such that 20 cm is maintained between the antenna and users, and
2. The transmitter module may not be co-located with any other transmitter or antenna,
3. For all products market in US, OEM has to limit the operation channels in CH1 to CH11 for 2.4G band
by supplied firmware programming tool. OEM shall not supply any tool or info to the end-user
regarding to Regulatory Domain change. (if modular only test Channel 1-11)
As long as the three conditions above are met, further transmitter testing will not be required. However, the
OEM integrator is still responsible for testing their end-product for any additional compliance requirements
required with this module installed.
Important Note:
In the event that these conditions cannot be met (for example certain laptop configurations or co-location
with another transmitter), then the FCC authorization is no longer considered valid and the FCC ID cannot be
used on the final product. In these circumstances, the OEM integrator will be responsible for re-evaluating the
end product (including the transmitter) and obtaining a separate FCC authorization.
End Product Labeling
The final end product must be labeled in a visible area with the following" Contains FCC ID: 2AL6KBL-
M8821CU1 "
Manual Information to the End User
The OEM integrator has to be aware not to provide information to the end user regarding how to install or
remove this RF module in the user’s manual of the end product which integrates this module.
The end user manual shall include all required regulatory information/warning as show in this manual.

Integration instructions for host product manufacturers according to KDB 996369 D03 OEM
Manual v01
2.2 List of applicable FCC rules
CFR 47 FCC PART 15 SUBPART C has been investigated. It is applicable to the modular transmitter
2.3 Specific operational use conditions
This
module is stand-alone modular. If the end product will involve the Multiple simultaneously transmitting condition or different
operational conditions for a stand-alone modular transmitter in a host, host manufacturer have to consult with module manufacturer
for the installation method in end system.
2.4
Limited module procedures
This module is Limited single modular without shielding, host manufacturer have to consult with module manufacturer for the module
limiting conditions when integrate the module in the host. module manufacturer should reviews detailed test data or host designs prior
to giving the host manufacturer approval.
2.5 Trace antenna designs
Not applicable
2.6 RF exposure considerations
This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be
installed and operated with minimum distance 20cm between the radiator & your body.
2.7 Antennas
This radio transmitter 2AL6KBL-M8821CU1 has been approved by Federal Communications Commission to operate with the
antenna types listed below, with the maximum permissible gain indicated. Antenna types not included in this list that have a
gain greater than the maximum gain indicated for any type listed are strictly prohibited for use with this device.
Model Type Connector
Peak gain ( dBi )
2400-2483.5
MHz
5150-5250
MHz
5250-5350
MHz
5470-5725
MHz
5725-5850
MHz
2400-2483.5
MHz
PIFA/
Dipole
/2.0dBi ////
2.4GWIFI
PIFA/
Dipole
/2.0dBi ////
5GWIFI
PIFA/
Dipole
//2.0dBi //2.0dBi
2.8
Label and
compliance
information
The final end product must be labeled
in
a visible area with the following" Contains FCC ID:2AL6KBL-M8821CU1".
2.9 Information on test modes and additional testing requirements
Host Host manufacturer which install this modular with limit modular approval should perform the test of radiated emission and
spurious emission according to FCC part 15C:15.247&FCC part 15E:15.407 and 15.209
requirement, only if the test result comply
with FCC part 15.247&FCC part 15E:15.407 and 15.209 requirement, then the host can be sold legally.
2.10
Additional testing,
Part 15
Subpart B disclaimer
Host manufacturer is responsible for compliance of the host system
with module
installed with all other applicable requirements for
the system
such as Part 15 B.