AB-RTC-TN-32.768kHz-2

Ultra-Low Power RTC Module

Revision: Initial Release

9/9/2025

Page 8

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Dimensions: Inches [mm]

Pin #

Function

Description

1

SDA

Serial Data

2

CLKOUT

Clock Output

3

VDD

Power Supply Voltage

4

CLKOE

Clock Output Enable

5

VSS

Ground

6

Interrupt

7

EVI

Event Input

8

SCL

Serial Clock Input

Mechanical Dimensions

Note: Interrupt Output: open-drain; active LOW; requires pull-up resistor when used;

used to output Periodic Countdown Timer, Periodic Time Update, Alarm, External Event,

Automatic Backup Switchover and Power On Reset Interrupt signals. Interrupt output

also in VBACKUP Power state.

Note: I2C Serial Clock Input: requires pull-up resistor. In VBACKUP Power state, the SCL pin

is disabled.

Note: I2C Serial Data Input-Output: open-drain; requires pull-up resistor. In VBACKUP

Power state, the SDA pin is disabled (high impedance).

Note: Backup Supply Voltage: When the backup switchover function is not needed,

VBACKUP must be tied to VSS with a 10 kΩ resistor.

Note: External Event Input: used for interrupt generation, interrupt driven clock output

and time stamp function. Remains active also in VBACKUP Power state. This pin should not

be left floating.

Note: Metal Lid is Connected to Vss (Pin #5)

INT