AB-RTC-XB-32.768kHz-2

Real Time Clock Module with I2C Bus

Revision:

Initial Release 12/10/2024

Page 5

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Pad #

Function

Description

1

VIO

Interface power supply pin.

2

SCL

I2C clock signal

3

SDA

I2C data signal

4

FOUT

Frequency output. Frequency can be set by FSEL bits.

5

/RST

Reset signal output. After the VDD pressure drop is

detected, the pin outputs a negative pulse.

6

/INT

Timing event interrupt output. Open-Drain.

7

GND

Ground

8

VDD

Power supply

9

VOUT

Internal voltage output pin. Connect capacitor of

1.0uF to Ground

10

VBAT

Backup battery pin. VBAT cannot floating, connect

to large-capacity capacitors or a backup battery.

Connect to VDDwhen switchover function is not

necessary.

Note: VBAT cannot floating, connect to large-capacity capacitors or a backup battery.

Connect to VDD when switchover function is not necessary.

Note: A 0.1μF bypass capacitor is needed at least between power supply pins and GND pin.

Note: Input pins regardless of VIO applied voltage. It is able to input up to 5.5V.

Note: Open drain pins regardless of VIO applied voltage. It is able to Pull-up to 5.5V

Note: When not in use, take the FOUT, /RST, /INT terminals as OPEN.

Mechanical Dimensions

Dimensions: inches[mm]