AB-RTC-XB-32.768kHz-2

Real Time Clock Module with I2C Bus

Revision:

Initial Release 12/10/2024

Page 2

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Parameters

Symbol

Min.

Typ.

Max.

Units

Notes

Frequency tolerance

∆f1/f

5

±23

ppm

VDD=3.0V;@25℃

Frequency stability

∆f2/f

-120

+10

ppm

VDD=3.0V, -20℃ to

+70℃,Reference

Frequency at 25℃

Oscillation start time

tSTA

1

s

VDD=2.5V-5.5V

Year Aging

fa

±5

ppm

FOUT duty cycle

tw/t

40

50

60

%

Parameters

Symbol

Min.

Typ.

Max.

Units

Notes

Power Supply (pad 8)[Note 1,2]

VDD

1.2

3.0

5.5

V

Interface voltage (pad 1)

VIO

1.6

3.0

5.5

V

If INIEN = 1，VDD<VDET1, the

interface is disable.

Backup Battery (pad 10)

VBAT

1.2

3.0

5.5

V

VDD Detect Voltage

-VDET2

1.2

1.44

1.68

V

Exchange voltage：VDD to VBAT

Operating Temperature

TOPR

-40

25

85

℃

Current consumption

IDD1

0.9

5.6

uA

SCL=SDA = ‘High’, FOUT=OFF,

INT=OFF,

VDD=VIO=3.0V,CHGEN=0b or

VBAT

≧VDET3,-40℃~85℃

Frequency Characteristics (Unless otherwise specified, GND=0V, Ta=-40

℃~+85℃)

DC Characteristics (Unless otherwise specified, GND=0V, VBAT=VDD=1.2~5.5V, VIO=1.6V ~5.5V, Ta=-40

℃~+85℃)

Block Diagram