FSC-BW121 Realtek RTL8821CS Wi-Fi 5&BT5.3 module 1T1R dual band
FSC-BW121 is a highly integrated 1T1R dual-band WLAN+Bluetooth based on Realtek RTL8821CS chip 5.3 Combined with modules, it is suitable for smart home devices and vehicle multimedia applications. This module supports 1-stream 802.11ac solution, has Mu-MIMO STA mode, is compatible with 802.11a/b/g/n standards, and supports SDIO 3.0/2.0 The interface is a hybrid HS-UART interface and supports dual-mode Bluetooth (Bluetooth/EDR + Long-range low-power Bluetooth) multi-connection communication, specially designed to meet the needs of in-vehicle high-speed wireless applications.
- Wi-Fi：
- Single chip integrates IEEE 802.11a/b/g/n/ac compliant WLAN CMOS MAC, baseband PHY and radio frequency (RF)
- Maximum PHY remote transfer rate: 86.7Mbps using 20MHz bandwidth, up to 200Mbps using 40MHz bandwidth
- Supports IEEE 802.11n/ac OFDM technology
- One transmit (Tx) and one receive (Rx) path
- Support 20MHz/40MHz/80MHz bandwidth transmission
- Supports 2.4GHz and 5GHz frequency band channels
- Support short guard interval (Short Guard Interval, 400ns)
- Support sounding packet
- Supports DSSS technology using DBPSK and DQPSK, and supports CCK modulation of long and short pilot codes
- Supports OFDM with BPSK, QPSK, 16QAM, 64QAM and 256QAM modulation. Convolutional coding rate: 1/2, 2/3, 3/4, 5/6
- Maximum data transfer rates are 54Mbps (802.11g), 150Mbps (802.11n), and 433Mbps (802.11ac)
- DSSS/CCK adopts Switch diversity technology
- Supports STBC (Space-Time Block Code), LDPC (Low Density Parity Check Code), AGC (Automatic Gain Control)
- Built-in 2.4GHz and 5GHz dual-band power amplifier (PA)/low noise amplifier (LNA)
- Supports Wi-Fi Direct (point-to-point) and multi-BSSID modes
- Bluetooth:
- Bluetooth compliant 5.3 Dual Mode Specification
- HS-UART interface for Bluetooth data transmission, compliant with H4 and H5 specifications
- Supports all packet types under BR/EDR
- Fast AGC (automatic gain control) adjustment to improve receiving dynamic range
- Built-in Class 1, Class 2 and Class 3 PA (power amplifier)
- Supports enhanced power control (Enhanced Power Control)
- Common characteristics:
- Integrate Realtek (Realtek) RTL8821CS chip
- 17mm × 17mm stamp hole (stamp) 56 Pin package
- external antenna (External Antenna)
- Support Android/Linux/FreeRTOS operating system
- Host interface:
- Wi-Fi: SDIO 1.1/2.0/3.0 standard, supports clock frequency up to 100MHz (SDR50 and DDR50)
- Bluetooth: HS-UART/PCM
| Wi-Fi | |
|---|---|
| standard | Wi-Fi 5 (IEEE 802.11 a/b/g/n/ac) |
| frequency band | 2.4 GHz / 5 GHz |
| model | STA, AP, Wi-Fi direct (P2P) |
| protocol | TCP/IP stack, TCP, UDP, HTTP, MQTT, and other customized protocols |
| antenna | Requires connection to external Feitong antenna or other antennas Supports installation of onboard Ipex antenna connector |
| Bluetooth | |
|---|---|
| standard | Bluetooth 5.3 (BR/EDR & THE) |
| protocol | HFP, A2DP, AVRCP, SPP, PBAP, HID, DUN, FTP, GATT, ANCS, and other customized protocols |
| antenna | Connect external Feitong antenna or other antennas Supports installation of onboard Ipex antenna connector |
| Common standards | |
|---|---|
| wafer | Realtek RTL8821CS |
| size (mm) | 17 × 17 × 2.4 |
| interface | SDIO, UART, PCM |
| working temperature | default: -40°C ~ +85°C
BW121D/BW121DI: 0°C ~ +70°C |
| storage temperature | -40°C ~ +85°C |
| Supply voltage | VDD: 3.0V~3.6V VDD_IO: 1.62V~3.6V |
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