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RS5C372B-E1

I2C-bus Serial Interface Real Time Clock (8pin SSOP)

RICOH Co.,Ltd. 

RS5C372B

s Pin Configuration

s Pin Description

RS5C372B (8PIN SSOP)

32KOUT 1

SCL 2

8 VDD

7 OSCIN

SDA 3

VSS 4

6 OSCOUT

5 /INTR

TOP VIEW

Symbol

SCL

SDA

Pin Name

Shift clock input

Serial input

output

Description

This pin is used to input shift clock pulses to synchronize data input/output to

and from the SDA pin with this clock. Up to 6V beyond VDD may be input.

This pin inputs and outputs written or read data in synchronization with shift

clock pulses from the SCL pin. Up to 6V beyond VDD may be input. This

pin functions as an Nch open drain output.

/INTR

Interrupt

output

32KOUT 32K Clock

Output

OSCIN Oscillator

OSCOUT circuit

input/output

This pin outputs periodic interrupt pulses and alarm interrupt (ALARM_A,

ALARM_B) to the CPU. This pin is off when power is activated from 0V.

This pin functions as an Nch open drain output.

This pin outputs 32.768kHz pulses (when 32.768kHz crystal is used),

It outputs 32.768kHz when power source is activated from 0V. This pin

functions as an CMOS push-pull output.

These pins configure an oscillator circuit by connecting a 32.768kHz or

32.000kHz crystal oscillator between the OSCIN–OSCOUT pins.

(Any other oscillator circuit components are built into the RS5C372B.)

VDD

VSS

Positive power

supply input

Negative power

supply input

The VDD pin is connected to the positive power supply and Vss to the

ground.

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