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US$26.33

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All-in-one Walkie Talkie Module Kit SA828 VHF FM Transceiver Small Volume Embedded Wireless Interphone Module

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                  Feature:

                  Full frequency band 400~480 MHZ/134~174MHZ
                  Transmit receive frequency independent
                  Bandwidth 12.5/25 KHz
                  Output power up to 1W
                  Open distance is 4-5 km
                  High receiving sensitivity: -124dBm
                  Highly integrated small volume
                  38-level CTCSS analog sub-audio code (available with PC software and serial port)
                  166-level CDCSS digital sub-audio (PC software and serial port can be set)
                  8-level squelch
                  Volume external potentiometer adjustment
                  High and low power options (500mW-lW)
                  Wide range of operating voltage 3.3-5.5V
                  Built-in EEPROM, data power-down save
                  Stable with 1.5ppm TCXO crystal

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

                  Parameter Test Conditions MIN. Typical MAX. Unit
                  Operating voltage range   3.3 4.2 5.5 V
                  Operating temperature range   -30 25 70 °C
                  Current consumption
                  Sleep current     <3   uA
                  Receiving current     60   mA
                  Emission current (high power)     650 750 mA
                  Emission current (low power)     450 550 mA
                  Transmitting RF parameter
                  Operating frequency range   400   480 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 Frequency offset   10   mV
                  Audio modulation distortion ®1. 5Khz/2. 5KHZ Frequency offset   2 5 %
                  Signal to noise ratio ®1. 5Khz/2. 5KHZ Frequency offset 38 40 45 dB
                  Adjacent channel power @12.5K offset   -60dBc   dBm
                  CTCSS modulation frequency offset   0.35 0.5 0.75 KHz
                  Receiving RF parameter
                  Receiving sensitivity 13dB output voice signal ratio   -124   dBm
                  Receive signal to noise ratio @1.5KHZ frequency offset 45 50   dB
                  Audio output amplitude     2   W
                  Audio output impedance     8   ohm

                  All-in-one Walkie Talkie Module Kit SA828 VHF FM Transceiver Small Volume Embedded Wireless Interphone Module

                  Pin number Pin definition Description
                  1 MIC+ External microphone positive
                  2 MIC- External microphone negative
                  3 VOX EN Voice control enable pin, connected to “0” with voice control function, default “1” output
                  4 1 Frequency 16 channel 8421 code, 1st bit, default "1" output
                  5 2 Frequency 16 channel 8421 code, 2nd bit, default "1" output
                  6 8 Frequency 16 channel 8421 code, 8th bit, default "1" output
                  7 4 Frequency 16 channel 8421 code, 4th bit, default "1" output
                  8 H/L RF high and low power pin, connected to “0” for low power, suspended for power
                  9, 10, 11, 13, 21 GND Power ground
                  14,15 SPK Audio output pin, external 8 ohm 2W speaker
                  16,17 VOL Audio volume adjustment pin, external 100K adjustable potentiometer
                  18 RXD Serial port receiving data port
                  19 TXD Serial port send data port
                  20 PTT Transmit/receive control pin, “0” is transmit; “1” is receive, default receive mode
                  22 VCC External 3. 3~5V power supply positive
                  23 CS Module sleep enable, "0" is the eye-open mode; "1" is normal work, the default is normal work.

                  Package includes:

                  1 x SA828 intercom module

                  1 x Rod antenna
                  1 x USB adapter board (TTL interface)
                  1 x Speaker

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