HOMEPRODUCTSWALKIE TALKIE MODULES SA878 : 2W EMBEDDED WALKIE TALKIE MODULE ADOPT TC...
SA878 : 2W Embedded Walkie Talkie Module  Adopt TCXO Crystal Oscillator
SA878 : 2W Embedded Walkie Talkie Module  Adopt TCXO Crystal Oscillator
SA878 : 2W Embedded Walkie Talkie Module  Adopt TCXO Crystal Oscillator
SA878 : 2W Embedded Walkie Talkie Module  Adopt TCXO Crystal Oscillator
SA878 : 2W Embedded Walkie Talkie Module  Adopt TCXO Crystal Oscillator
SA878 : 2W Embedded Walkie Talkie Module  Adopt TCXO Crystal Oscillator
SA878 : 2W Embedded Walkie Talkie Module  Adopt TCXO Crystal Oscillator
SA878 : 2W Embedded Walkie Talkie Module  Adopt TCXO Crystal Oscillator
SA878 : 2W Embedded Walkie Talkie Module  Adopt TCXO Crystal Oscillator
SA878 : 2W Embedded Walkie Talkie Module  Adopt TCXO Crystal Oscillator
SA878 : 2W Embedded Walkie Talkie Module  Adopt TCXO Crystal Oscillator
SA878 : 2W Embedded Walkie Talkie Module  Adopt TCXO Crystal Oscillator

SA878 : 2W Embedded Walkie Talkie Module Adopt TCXO Crystal Oscillator

SA878 is a cost-effective integrated professional walkie-talkie module, built-in high-speed microcontroller, high-performance RF transceiver chip and RF power amplifier, and provides a standard serial port to communicate with the module, so that the module's related parameters can be set quickly and easily. Function control. Users only need to connect an audio amplifier, microphone, and speaker to this module to work as a small walkie-talkie. The simplified interface and ultra-small size make this module widely available, and can be easily and quickly embedded in various handheld devices to improve the overall performance of the terminal products.

ParameterTest conditionMinTyp.MaxUnit
Power supply 3.34.25.5V
Working Temperature range -302570
Current Consumption
Sleep current  ≤1 uA
RX current  60 mA
TX current(High power)  900950mA
TX current(low power)  450550mA
Transmitting RF Parameters
Frequency rangeUHF400 480MHz
TX power(high power)@VCC=4.0V3132.533dBm
TX power(low power)242526dBm
Modulation frequency@1.5KHz/2.5KHz Frequency offset 10 mV
Audio modulation distortion@1.5KHz/2.5KHz Frequency offset 25%
SignaltoNoiseRatio@1.5KHz/2.5KHz Frequency offset384045dB
adjacent-channel power@12.5K offset -60 dBc
CTCSS Modulation frequency 0.350.50.75KHz
Receiving RF Parameters
Receiving sensitivity13dB Output voice signal ratio -124 dBm
Receiving SNR@1.5KHz Frequency offset4550 dB
Audio output amplitude  700 mV
Audio Output impedance  200 OHm
Type Analog walkie talkie
Output Power 2W

Features of Walkie Talkie Module SA878

  • UHF band 400~480 MHz
  • Transmit receive frequency independent
  • Bandwidth 12.5 KHz
  • RSSI signal strength indication
  • Open distance is 5 kilometers
  • High receiving sensitivity: -124 dBm
  • Highly integrated small volume
  • 38-level CTCSS analog sub-audio code
  • 166-level positive phase, inverted CDCSS digital sub-audio
  • 8-level squelch
  • 8-level adjustable volume
  • High and low power options (1.6W/8W)
  • Wide operating voltage 3.3-5.5 V
  • Built-in EEPROM, data saved even powered off
  • Stable with 1ppm TCXO crystal

 

Application of Walkie Talkie Module SA878

  • Small walkie talkie
  • Ignore the intercom system
  • Building community security system
  • Outdoor sports products
  • Audio monitoring system


Pins of walkie talkie module SA878

Pin NO.Pin nameI/O state
1MIC_INMicrophone or line in
2TXDTXD of the module and connect to external RXD
3RXDRXD of the module and connect to external TXD
4、5、6NCNot connected
7ANTconnect 50 ohm antenna
8、9、10GNDGrounding
11VCCConnect power positive
12H/Lhigh/low output power control; Leave open for high output power,low level to low output power. (Please kindly note: this pin can NOT be connected to VDD or high level of cmos output)
13CSPower Down control, "0" for power down mode; "1" for the normal work; Default power down mode
14PTTModule Input, Transmitting/receiving control, "0" force the module to enter TX state; and "1" to Rx state
15+3.3V3.3V voltage output pin, can be connected to 50mA load
16LINE_OUTAudio output (between 200mv-1400mv, can be set by software)
17NCNot connected
18SPKENReceive signal indication pin (can externally control audio power amplifier), active high level, default low level
19、20GNDGrounding


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