1743NRZ

Pin Definition

Pin	Description	Connection	Circuits
+5V power supply	positive power supply, the voltage range of 3.4V ~ 4.5V, this range may damage the module, or lead to abnormal work.	to amplifier power	with two external capacitors if amplifier does not have
GND	power ground, audio ground. Short as possible	Must lead out two wires to connect to power ground and audio ground seperatedly.	-
Left channel	(1)	to amplifier left channel	via a capacitor (depending on the input matching the amplifier)
Right channel	(1)	to amplifier right channel	via a capacitor (depending on the input matching the amplifier)
Mute	default - 3V / mute - low, or use transistor to reverse TTL	to amplifier mute	-
The status indicator	flash - not connected / non-flash - connected, weak drive, use red LED or transistor to gain high drive	-	resistor + LED
Reserved port	default - high / power-down - low	-	can use with switch

It is recommended to connect a capacitor (depending on the input matching the amplifier) at the output port.

main circuit diagram
reverse mute signal logic high / low
add external mute circits for amplifier which has no mute, 7002 up connect to L or R output, left to mute.
wiring and elimate noise 01
wiring and elimate noise 02
wiring and elimate noise 03
wiring and elimate noise 04
wiring and elimate noise 05
wiring and elimate noise 06