SA868S : 2W Embedded Analog Walkie Talkie Module

SA868S : 2W Embedded Analog Walkie Talkie Module

SA868S 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 module's related parameters can be set quickly and easily. Function 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.

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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）			900	1000	mA
TX current（low power）			450	550	mA
Transmitting RF Parameters
Frequency range	UHF	400		480	MHz
	VHF	134		174	MHz
	350	320		400	MHz
Out power（high power）	@VCC=4.0V	31	32.5	33	dBm
Out power（low power）	@VCC=4.0V	24	25	26	dBm
Modulation frequency	@1.5KHz/2.5KHz Frequency offset		10		mV
Audio modulation distortion	@1.5KHz/2.5KHz Frequency offset		2	5	%
SignaltoNoiseRatio	@1.5KHz/2.5KHz Frequency offset	38	40	45	dB
adjacent-channel power	@12.5K offset		-60		dBc
CTCSS Modulation frequency		0.35	0.5	0.75	KHz
Modulation frequency	UHF	400		480	MHz
Receiving RF Parameters
Receiving sensitivity	13dB Output voice signal ratio		-124		dBm
Receiving SNR	@1.5KHz Frequency offset	45	50		dB
Audio output amplitude			700		mV
Audio Output impedance			200		OHm

Type	Analog walkie talkie
Output Power	2W

Features of Walkie Talkie Module SA868

UHF band 400~480 MHz
VHF band 134~174 MHz
350 band frequency：320-400MHz
Transmit receive frequency independent
Bandwidth 12.5 KHz
RSSI signal strength indication
Open distance is 5 kilometers
High receiving sensitivity: -124 dBm
Highly integrated small volume
38-level CTCSS analog sub-audio code
166-level positive phase,inverted CDCSS digital sub-audio
8-level squelch
8-level adjustable volume
High and low power options (1.6-1.8W)
Wide operating voltage 3.3-5.5 V
Stable with 1ppm TCXO crystal

Application of Walkie Talkie Module SA868

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

module PIN DEFINTION

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
17	TXD	TXD of the module and connect to external RXD
18	MIC_IN	Microphone or line in

Mechanical Dimensions of Walkie Talkie Module SA868

SA868S : 2W Embedded Analog Walkie Talkie Module

Features of Walkie Talkie Module SA868

Application of Walkie Talkie Module SA868

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