AB-RTC-TH-32.768kHz-2

Real Time Clock Module with I2C Bus

Revision:

Initial Release 12/10/2024

Page 4

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Note 1: To apply Min. value of VDD and VBAT, VCORE need to be supplied with more than 2.5V at least for the oscillation to stabilize (oscillation start time tSTA).

Note2：After powered off, ensure that VDD = VBAT = GND for more than 10 seconds before next power on

Output Control Pin (pad 1)

FOE

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

-0.5

0.5

uA

VIN = VDD or GND

Output Control Pin (pad 10)

/INT

Output voltage low-level

VOL

GND

GND+0.25

V

VDD=5.0V, IOL = 1mA

GND

GND+0.4

VDD=3.0V, IOL = 1mA

Output Leak Current

IOZ

-0.5

0.5

uA

VIN = VDD or GND

Parameters

Symbol Min. Typ. Max. Units

Notes

Startconditionsetuptime[Note1] tHD;STA 0.6

us

Startconditionholdtime[Note1] tSU;STA 0.6

us

Stop condition setup time

tSU;STO

0.6

us

Bus idle time between start

condition and stop condition

tRCV

1.3

us

Data setup time

tSU;DAT

100

ns

Data hold time

tHD;DAT

0

0.9

ns

I2C clock signal (pad 5)

SCL

SCL clock frequency

fSCL

400

kHz

SCL low voltage time

tLOW

1.3

us

SCL high voltage time

tHIGH

0.6

us

SCL rising time

tr

0.3

us

SCL falling time

tf

0.3

us

I2C data signal (pad 7)

SDA

SDA rising time

tr

0.3

us

SDA falling time

tf

0.3

us

AC Characteristics (Unless otherwise specified, VDD =2.5V ~ 5.5V; Ta=-40

℃~+85℃)