1W Embedded walkie talkie module SA818

1W walkie talkie module SA818
walkie talkie module SA818
walkie talkie module SA818
walkie talkie module SA818
embedded walkie talkie module SA818
walkie talkie module SA818
1W walkie talkie module SA818
walkie talkie module SA818
walkie talkie module SA818
walkie talkie module SA818
embedded walkie talkie module SA818
walkie talkie module SA818

SA818 is a cost-effective integrate professional walkie talkie module, it comes with built-in high performance microcontroller, narrow band RF transceiver IC and RF power amplifier,SA818 offer standard UART interface, which easy to configure the related parameters and control the TX/RX function, Users only need to add external audio amplifier, microphone and speaker, then it becomes a professional walkie talkie, Simplified interface and Ultra small size make this module widely used in various applications and conveniently embedded into various handheld.

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Parameter Test condition Min Typ. Max Unit
Power supply   3.3 4.2 5.5 V
Working Temperature range   -30 25 70
Current Consumption
Sleep current     ≤1   uA
RX current     60   mA
TX current(High power)     650 750 mA
TX current(low power)     450 550 mA
Transmitting RF Parameters
Frequency range UHF  400   480 MHz
Frequency range VHF  134   174 MHz
Out power(high power) @VCC=4.0V 28 29.5 31 dBm
Out power(low power) 25 26.5 27 dBm
Modulation frequency @1.5KHz/2.5KHz frequency deviation   10   mV
Audio modulation distortion @1.5KHz/2.5KHz frequency deviation   2 5 %
SignaltoNoiseRatio @1.5KHz/2.5KHz frequency deviation 38 40 45 dB
adjacent-channel power @12.5K offset   -60   dBc
CTCSS Modulation frequency   0.35 0.5 0.75 KHz
Receiving RF Parameters
Receiving sensitivity     -124   dBm
Receiving SNR @1.5KHz                frequency deviation 45 50   dB
Audio output amplitude     700   mV
Audio Output impedance     200   OHm

Features

  • UHF band frequency: 400~480 MHz
  • VHF band frequency: 134~174 MHz
  • 350 band frequency:320-400MHz  (3 frequency bands are optional)
  • Tx and Rx frequency, Tx and Rx CTCSS, CDCSS can be set alone.
  • Band width: 12.5 KHz / 25 KHz
  • Output power up to 1W
  • Distance up to 4-5km in open area
  • Sensitivity:-124 dBm
  • High-integrated, Small Size
  • 38 CTCSS
  • 166 CDCSS
  • 8 level squelch
  • 8 adjustable volume
  • High/ low power is optional(500mW/1W)
  • Wide range of working voltage: 3-5.5 V
  • 1 ppm KDS TCXO crystal, Stable performance

Application

  • small walkie talkie
  • Invisible intercom system
  • audio surveillance system
  • Outdoor Sport products
  • building community security system

SA818 Typical application circuit

SA818 Pin definition

Pin NO. Pin name I/O state
1 Audio ON Connected to audio power amplifier. When the module worked, it can control the extra audio amplifier automatically, it will output low level to turn on the amplifier and high level to turn off the amplifier.
2 NC Not connected
3 AF_OUT Audio output
4 NC Not connected
5 PTT Module Input, Transmitting/receiving control, "0" force the module to enter TX state; and "1" to Rx state
6 PD Power Down control, "0" for power down mode; "1" for the normal work
7 H/L high/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)
8 VBAT Connect power positive
9 GND Grounding
10 GND Grounding
11 NC Not connected
12 ANT connect 50 ohm antenna
13,14,15 NC Not connected
16 RXD RXD of the module and connect to external TXD  *Before enter sleep mode, user need to pull low RXD Pin to prevent current leakage or poor reset in the next time.
17 TXD TXD of the module and connect to external RXD
18 MIC_IN Microphone or line in

 

SA818 Mechanical Dimensions

Frequency 134~174MHz,320~400MHz,400~480MHz
Output Power 500mW,1W
Modulation Analog

Contact us

NiceRF Wireless Technology Co., Ltd.
+86-755-23080616
sales@nicerf.com
309-314, 3/F, Bldg A, Hongdu business building, Zone 43, Baoan Dist, Shenzhen, China