SA818 VHF Very High Frequency 1W Wireless Walkie-talkie Module intercom Module Embedded

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Item Overview
SA818 is a cost-effective integrated professional walkie-talkie module with built-in high-speed microcontroller, high-performance RF transceiver chip and RF power amplifier, and provides standard TTL serial port to communicate with the module, which can quickly and easily set the relevant parameters of the module and Transceiver function for 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.
Features
∵ VHF band 134~174 MHZ
∵ Transmit receive frequency independent
∵ Bandwidth 12.5 KHz
∵ Output power up to 1W
∵ Open distance is 4-5 km
∵ High receiving sensitivity:-124 dBm
∵ Highly integrated small volume
∵ 38-level CTCSS analog sub-audio code
∵ 166-level positive phase, reverse phase CDCSS digital sub-audio
∵ 8 levels of squelch
∵ 8-level adjustable volume
∵ High and low power options (500mW-1W)
∵ Wide operating voltage 3.3-5.5 V
∵ Built-in EEPROM, data power-down save
∵ 1ppm TCXO crystal oscillator, stable performance
Technical Parameters
parameter:Test Conditions:Minimum:typical:maximum:unit
Operating voltage range::3.3:4.2:5.5:V
working temperature range::-30:25:70:→
Current consumption
Sleep current:::≤1::uA
Receiving current:::60::mA
Emission current (high power):::650:750:mA
Emission current (low power):::450:550:mA
Transmitting RF parameters
Operating frequency range:UHF:400::480:MHZ
Operating frequency range:VHF:134::174:MHZ
Transmit power (high power):@VCC=4.0V:28:29.5:31:dBm
Transmit power (low power)::25:26.5:27:dBm
Modulation sensitivity:@1.5Khz/2.5KHZ offset::10::mV
Audio modulation distortion:@1.5Khz/2.5KHZ offse::2:5:%
Signal to noise ratio:@1.5Khz/2.5KHZ offse:38:40:45:dB
Adjacent channel power:@12.5K offset::-60dBc::dBm
CTCSS modulation frequency offset::0.35:0.5:0.75:KHZ
Receiving radio frequency parameters
Receiving sensitivity:13dB output voice signal ratio::-124::dBm
Receive signal to noise ratio:@1.5KHZ frequency offset:45:50::dB
Audio output amplitude:::700::mV
Audio output impedance:::200::OHm
Pin
Number:Pin definition
1:Audio ON
2:NC
3:AF_OUT
4:NC
5:PTT
6:PD
7:H/L
8:VBAT
9:GND
10:GND
11:NC
12:ANT
13,14,15:NC
16:RXD
17:TXD
18:MIC_IN
Application
– Small walkie talkie
– Ignore the intercom system
– Building community security system
– Outdoor sports products
– Audio monitoring system
If you want to buy UHF(400~480 MHZ),click to buy them.
Package Included
1 x VHF Wireless Transceiver Module