RT9737

Copyright © 2014 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation

www.richtek.com

DS9737-00

February

2014

2

Functional Pin Description

Pin No.

Pin Name

Pin Function

A1

INA1

Input 1 of Channel A.

A2

SEL

Selection for Input 1or 2.

A3

INB1

Input 1 of Channel B.

B1

OUTA

Output of Channel A.

B2

GND

Ground.

B3

OUTB

Output of Channel B.

C1

INA2

Input 2 of Channel A.

C2

VDDEN

Supply Voltage.

C3

INB2

Input 2 of Channel B.

Function Block Diagram

Operation

The switches are fully specified to operate from a

single 2.5V to 5.5V power supply. RT9737 via internal

design, be able to handle when the input signal is

greater than the supply voltage range and don't cause

the signal distortion. RT9737 control the switches with

a control pin, SEL. When SEL voltage under low level,

internal switch is thrown to position 1. Audio signal are

via INA1 and INB1 to IC OUTA and OUTB. And then

OUTA, OUTB output to the load and Audio connector.

When SEL voltage above high level, internal switch is

thrown to position 2. When the supply voltage VDDEN

under operation range, the switches impedance are

risen and all analog signal ports can keep out signals

from 0V to 5.5V.

INA1

INA2

GND

OUTB

VDDEN

INB1

INB2

OUTA

SEL