RT9428

2

DS9428-01

October 2014

www.richtek.com

©

Copyright

2014 Richtek Technology Corporation. All rights reserved.

is a registered trademark of Richtek Technology Corporation.

Function Pin Description

Pin No.

Pin Name

Pin Function

A1

TEST

Test Pin. Connect to GND pin during normal operation.

A2

VBAT

Battery Voltage Measurement Input.

A3

VDD

Processor Power Input. Decouple with a 10nF capacitor.

A4

GND

Ground.

B1

SDA

I/O.

B2

SCL

B3

QS

Quick Sensing Input. Active high to restart the calculation. Pull low to GND during

normal operation.

B4

ALERT

Alert Output. When SOCLow condition is detected, It outputs low as interrupt

signal. Connect to interrupt input of the system processor. Connect to GND if not

used.

Ordering Information

Note :

Richtek products are :

ments of IPC/JEDEC J-STD-020.

Marking Information

Pin Configurations

(TOP VIEW)

WL-CSP-8B 1.6x1.52 (BSC)

B1

B2

B3

B4

A1

A2

A3

A4

RT9428

Package Type

WSC : WL-CSP-8B 1.6x1.52 (BSC)

1SW

1S : Product Code

W : Date Code