AB-RTC-TA-32.768kHz-2

Real Time Clock Module with I2C Bus

Revision:

Initial Release 12/5/2024

Page 3

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Note 1: During the power on and vibration starting time, a voltage of more than 2.5V must be provided to ensure the stable vibration starting of the oscillation circuit.

Note2：After the power supply is powered off, ensure that VDD = GND for more than 10 seconds, and then power on.

Parameters

Symbol Min. Typ. Max. Units

Notes

PowerSupply(pad8)[Note1,2] VDD 2.5 3.0 5.5 V

Power Supply Time keeping

(pad 8)[Note 1,2]

VDD

1.6

3.0

5.5

V

Operating Temperature

TOPR

-40

25

85

℃

Current consumption

IDD1

1.25

5.1

uA

VDD = 5.0V, fSCL=0Hz，SCL and

SDA are low.

IDD2

1.0

4.9

uA

VDD = 3.0V, fSCL=0Hz，SCL and

SDA are low.

I2C clock signal (pad 6)

SCL

Input voltage high-level

VIH

0.8*VDD

5.5

V

Input voltage low-level

VIL

GND-0.3

0.2*VDD

V

Input Leak Current

ILK

-0.1

0.1

uA

I2C data signal (pad 5)

SDA

Input voltage high-level

VIH

0.8*VDD

5.5

V

Input voltage low-level

VIL

GND-0.3

0.2*VDD

V

Output voltage low-level

VOL

GND

GND+0.4

V

VDD≥3.0V, IOL = 3mA

Input Leak Current

ILK

-0.1

0.1

uA

Output Leak Current

IOZ

-0.1

0.1

uA

Frequency Output (pad 3)

FOUT

Output voltage high-level

VOH

4.0

5.0

V

VDD=5.0V, IOH = -1mA

2.2

3.0

VDD=3.0V, IOH = -1mA

2.9

3.0

VDD=3.0V, IOH = -100uA

Output voltage low-level

VOL

GND

GND+0.5

V

VDD=5.0V, IOL = 1mA

GND

GND+0.8

VDD=3.0V, IOL = 1mA

GND

GND+0.1

VDD=3.0V, IOL = 100uA

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

℃~+85℃)