SA818Pro : 1W CE/FCC Embedded Walkie Talkie Module With LNA & Voice/Data

SA818Pro : 1W CE/FCC Embedded Walkie Talkie Module With LNA & Voice/Data

SA818Pro is a cost-effective integrated professional walkie-talkie module, built-in high-speed micro-controller, high-performance RF transceiver chip and RF power amplifier, and provides a standard serial port to communicate with the module, so that the relevant parameters of the module and the transceiver can be set quickly and easily. Function to 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 enable this module to be widely used, and it can also be easily and quickly embedded in various handheld devices to improve the overall performance of the terminal product. SA818Pro strictly uses lead-free technology for production and testing, and meets RoHS and Reach standards.

SA818Pro walkie talkie module builds on the SA818S by adding a low-noise amplifier (LNA), improving receiver sensitivity by 4 dB, and introducing support for lightweight data transmission. This enables the device to transmit status information, short commands, or positioning data in addition to voice.

In terms of RF performance, the SA818Pro delivers stable output power across the entire 400~470MHz band, with power variation of less than 1 dB. At low power, it achieves 27dBm 1dB over 400-470Mhz

(Note:The SA818Pro is fully compatible with the SA818S in both hardware and software interfaces.)

The SA818Pro is strictly manufactured and tested using lead-free processes, complying with RoHS and Reach standards. The SA818Pro module is also available in a version that meets CE certification to cater to different market demands.

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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			76		mA
TX current（High power）	@4.0v,1.6W		920	1000	mA
TX current（low power）	@4.0V,0.5W		500	600	mA
TX current（High power）	@4.0v,1.0W,FCC		800	900	mA
TX current（low power）	@4.0V,0.5W,FCC		600	650	mA
Transmitting RF Parameters
Frequency range	UHF	400		470	MHz
Frequency range	VHF	134		174	MHz
Out power（high power）	@VCC=4.0V	31	31.8	32.5	dBm
Out power（low power）	@VCC=4.0V	26	27	27.5	dBm
Out power（high power）	@VCC=4.0V,FCC	28.5	29.5	30.5	dBm
Out power（low power）	@VCC=4.0V,FCC	26	27	27.5	dBm
Modulation frequency	@1.5KHz/2.5KHz frequency deviation		10		mV
Audio modulation distortion			2	5	%
SignaltoNoiseRatio		38	40	45	dB
adjacent-channel power	@12.5K offset		-60dBc		dBm
CTCSS Modulation frequency		0.35	0.5	0.75	KHz
Receiving RF Parameters
Receiving sensitivity	13 dB output voice (SNR)		-124		dBm
Receiving SNR	@1.5KHz frequency deviation	45	50		dB
Audio output amplitude			700		mV
Audio Output impedance			200		OHm

Type	Analog walkie talkie
Output Power	500mW,1W

Features of Walkie Talkie Module SA818Pro

UHF band frequency: 400~480 MHz VHF band frequency: 134~174 MHz
(Above 2 frequency bands are optional. Customized options are available for 200–260 MHz and 470–520 MHz.)
Tx and Rx frequency, Tx and Rx CTCSS, CDCSS can be set alone.
Band width 12.5KHz / 25 KHz
RSSI Signal Strength Indicator
Distance up to 4-5km in open area
Sensitivity：-124 dBm
Supports wireless data transmission and reception
High-integrated, Small Size
38 CTCSS & 166 CDCSS
8 level squelch
8 adjustable volume
High Power: 1.5 W (typical), 1 W (CE)，Low Power: 500 mW
Wide range of working voltage:3.3-5.5 V
TCXO crystal, Stable performance

Application of Walkie Talkie Module SA818Pro

small walkie talkie
Invisible intercom system
audio surveillance system
Outdoor Sport products
building community security system

SA818Pro walkie-talkie module typical application block diagram with MCU UART control, antenna, microphone, amplifier and speaker

SA818Pro module outline with pin numbering (pins 1–18)

Pin NO.	Pin name	I/O state
1	Audio ON	Audio power amplifier control: default high level; goes low when a signal is received
2	UPDATA	UART Upgrade Pin – Pull low on power-up to enter UART upgrade mode; normally left floating.
3	AF_OUT	Audio output
4	NC	Not connected
5	PTT	TX/RX Control Pin – “0” for transmit, “1” for receive; default is receive.
6	PD	Module Sleep Enable – “0” or floating for sleep; “1” for normal operation.
7	H/L	RF Power Control – Ground for low power; floating for high power.
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 *Before enter sleep mode, user need to pull low RXD Pin to prevent current leakage or poor reset in the next time.
17	TXD	TXD of the module and connect to external RXD
18	MIC_IN	Microphone or line in

SA818Pro mechanical dimensions drawing, approx. 35.60 × 19.00 × 3.20 mm, with pin location dimensions

SA818Pro : 1W CE/FCC Embedded Walkie Talkie Module With LNA & Voice/Data

Features of Walkie Talkie Module SA818Pro

Application of Walkie Talkie Module SA818Pro

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