SA858 : 4W UHF BAnd High Power Long Range All-in-one Walkie Talkie Module

SA858 is a professional 4W walkie talkie module. Strong RF circuit, DSP, digital interface, and audio amplifier is built in. Besides Uart command, user can use our provided PC software to configure all the parameters. The parameters includes: Tx frequency, Rx-frequency, Tx CTCSS /CDCSS, Rx CTCSS/CDCSS , digital volume and SQ. To avoid the heating for this high power walkie talkie, we have done special handling on the software with a strong radiator added, which makes it has no problem for long time continuous working.
When SA858 is connected with SA858-PJ, it is easy to organize a professional all in one walkie talkie system, the system include 16 predefined frequency channels, adjustable volume, configurable CTCSS/CDCSS. User need only to connect with power supply and speaker.
Simplified interface and ultra small size make SA858 widely used in various applications and conveniently embedded into various handheld devices.

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★ Note：In high level, the pins are in 3.3V.

Parameter	Test condition	Min.	Typ	Max.	Unit
Operating voltage range	--	3.3	8	9	V
Operating temperature range	--	-30	20	70	℃
Power Consumption
Sleeping Current	--	--	≤3		uA
RX current	--	--	60		mA
TX current (high output power)	@8v, 424.75MHz	1400	1500		mA
TX current (low output power)	@8v, 424.75MHz	850	900		mA
TX current (high output power)	@4V, 424.75MHz	1100	1150		mA
TX current (low output power)	@4V, 424.75MHz	650	700		mA
TX Frequency Parameter
Operating frequency range	UHF	400	450	480	MHz
Operating frequency range	VHF	134	150	174	MHz
TX current (high output power)	@VCC=4.0V	30	31	32	dBm
TX current (low output power)	@VCC=4.0V	26	27	28	dBm
TX current (high output power)	@VCC=8.0V	35	36	36.5	dBm
TX current (low output power)	@VCC=8.0V	30.5	31.5	32	dBm
Modulation frequency	@1.5KHz/2.5KHz frequency deviation		10		mV
Audio modulation distortion	@1.5KHz/2.5KHz Frequency deviation	--	2	5	%
Signal to Noise Ratio	@1.5KHz/2.5KHz frequency deviation	38	40	45	dBm
Adjacent Channel Ratio	@12.5K offset	--	-60		dBc
CTCSS Modulation frequency		0.35	0.5	0.75	KHz
RX Frequency Parameter
RX sensitivity	13dB output audio SNR	--	-124	--	dBm
RX SNR	@1.5 KHz Frequency deviation	45	50	--	dB
Audio output power	--	--	2	--	W
Audio output impedance	--	--	8	--	OHm

Type	Analog walkie talkie
Output Power	1W,4W

Features of Walkie Talkie Module SA858

Pins of Walkie Talkie Module SA858

Pin No.	Pin name	Description
1	MIC+	Connect positive of external microphone
2	GND	Connect negative of external microphone or power ground
3	SPK/VOL	Eternal connect 8 ohm and 2W speaker and volume adjust electronic equipment
4	SPK	Audio output pin, external connect 8oHm and 2W speaker
5	H/L	RF high and lower power pin，connect“0” is lower power，off is high power
6	VOL	Audio volume adjust pin，external connect 200K adjustable electronic equipment
7	GND	External connect negative power
8	RXD	Data receive serial port
9	TXD	Data send serial port
10	VOXEN	Volume enable pin，“0” is open volume control function，“1”is close，default is“1”
11	PTT	Send/receive control pin，“0”is send；“1” is receive，default is receive
12	8	Frequency 16 channels, 8421code，No.8 bits，default is“1”output
13	4	Frequency 16 channels, 8421code，No.4 bits，default is“1”output
14	2	Frequency 16 channels, 8421code，No.2 bits，default is“1”output
15	1	Frequency 16 channels, 8421code，No.1 bit，default is“1”output
16	PD	Module sleep enable, “0” is sleep mode；“1”normal working，default is normal working mode
17	VCC	Connect positive power
18	GND	Connect negative power
19, 21	GND	Connect antenna ground
20	ANT	RF signal output，external connect 50oHm antenna