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SA818S : 1W Embedded Analog Walkie Talkie Module With AMP & LNA
SA818S : 1W Embedded Analog Walkie Talkie Module With AMP & LNA
SA818S : 1W Embedded Analog Walkie Talkie Module With AMP & LNA
SA818S : 1W Embedded Analog Walkie Talkie Module With AMP & LNA
SA818S : 1W Embedded Analog Walkie Talkie Module With AMP & LNA
SA818S : 1W Embedded Analog Walkie Talkie Module With AMP & LNA
SA818S : 1W Embedded Analog Walkie Talkie Module With AMP & LNA
SA818S : 1W Embedded Analog Walkie Talkie Module With AMP & LNA
SA818S : 1W Embedded Analog Walkie Talkie Module With AMP & LNA
SA818S : 1W Embedded Analog Walkie Talkie Module With AMP & LNA
SA818S : 1W Embedded Analog Walkie Talkie Module With AMP & LNA
SA818S : 1W Embedded Analog Walkie Talkie Module With AMP & LNA

SA818S : 1W Embedded Analog Walkie Talkie Module With AMP & LNA

  • SA818S 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 relevant parameters of the module and the transceiver can be set quickly and easily. Function to 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 enable this module to be widely used, and it can also be easily and quickly embedded in various handheld devices to improve the overall performance of the terminal product. SA818S strictly uses lead-free technology for production and testing, and meets RoHS and Reach standards.
  • The SA818S walkie-talkie module adds an LNA circuit on the basis of SA818, and the sensitivity is increased by 4dBm. For the entire frequency range of 400-470MHz, the power output fluctuation is less than 1dB, and the low power can achieve an error of 27dBm+/-1dBm from 400-470MHz. Note: The software and hardware interfaces are the same as before and are compatible with each other.
  • The SA818S is strictly manufactured and tested using lead-free processes, complying with RoHS and Reach standards. The SA818S module is also available in a version that meets CE certification to cater to different market demands.
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

 

Type Analog walkie talkie
Output Power 500mW,1W

Features of Walkie Talkie Module SA818S

  • UHF band frequency: 400~480 MHz
  • VHF band frequency: 134~174 MHz
  • 350 band frequency:320-400MHz  

    (Above 3 frequency bands are optional,

    also below 2 frequency bands can be 

    designed specially)

  • 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 of Walkie Talkie Module SA818S

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

SA818S

SA818S

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

 

Mechanical Dimensions of walkie talkie module SA818

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