SA818 Wireless Walkie Talkie Module UHF 400-480 MHz Audio Module
- Stock: In Stock
- Model: EB0042852
- SKU: EB0042852
Introduction:
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.
Feature:
| Parameter | Test Conditions | MIN. | Typical | MAX. | UNIT |
| Operating voltage range | 3.3 | 4.2 | 5.5 | V | |
| Operating 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 | ||
| Emission frequency parameter | |||||
| Operating frequency range | UHF (this item) | 400 | 480 | MHZ | |
| Operating frequency range | VHF (ID:1441651) | 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 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 radio frequency 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 | 700 | mV | |||
| Audio output impedance | 200 | OHm | |||
| Pin number | Pin definition | Description | ||||||||||||
| 1 | Audio ON | Audio power amplifier control, active low | ||||||||||||
| 2 | NC | Empty foot | ||||||||||||
| 3 | AF_OUT | Audio output | ||||||||||||
| 4 | NC | Empty foot | ||||||||||||
| 5 | PTT | Transmit/receive control pin, “0”
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