AB-RTC-TNA-32.768kHz-2

Ultra-Low Power RTC Module

Revision: Initial Release

9/9/2025

Page 4

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SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNIT

Supplies

VDD

Power Supply Voltage

Time-keeping mode (2)

1.5

5.5

V

I2C-bus (100 kHz)

1.5

5.5

I2C-bus (400 kHz)

1.5

5.5

VDD;EXT

Power Supply Voltage

for extended temperature range

Time-keeping mode,

TA = +85 °C to +105°C (2)

1.6

5.5

V

I2C-bus (100 kHz),

TA = +85 °C to +105°C

1.6

5.5

I2C-bus (400 kHz),

TA = +85 °C to +105°C

2.1

5.5

VDDF

VDD failing slew rate(1)

0.5

V/µs

VDDR2

VDD rising slew rate(1)

Rising from VDD = 1.5 V to VDD ≤

3.5 V

0.2

V/µs

Rising from VDD = 1.5 V to VDD >

3.5 V

0.07

VLOW1

VDD low and POR detection.

Temperature compensation

stops (flag V1F). (3)

1.1

1.2

1.3

V

VLOW1

VDD low and POR detection.

Data no longer valid (flag V2F).(3)

1.1

1.2

1.3

V

IVDD

VDD supply current timekeeping

I2C-bus inactive, CLKOUT

disabled, average current

VDD = 1.5 V (4)

240

600

nA

VDD = 3.0 V (4)

240

600

VDD = 5.0 V (4)

250

700

IVDD:EXT

VDD supply current timekeeping

I2C-bus inactive, CLKOUT

disabled, average current

for extended temperature range

VDD = 1.6 V, +85 to 105°C (4)

800

nA

VDD = 3.0 V, +85 to 105°C (4)

800

VDD = 5.0 V, +85 to 105°C (4)

900

IVDD:12C

VDD supply current during

I2C burst read/write, CLKOUT

disabled

VDD = 1.5 V, SCL = 100kHz (5)

2

15

µA

VDD = 3.0 V, SCL = 400kHz (5)

5

40

VDD = 5.0 V, SCL = 400kHz (5)

7

60

IDD:TSP

VDD supply current temperature

sensing peak

Typical duration = 1.3 ms

19

µA

ΔIVDD:CK32

Additional VDD supply current (6)

VDD = 3.0 V, FCLKOUT = 32.768

kHz, CL = 10 pF

1

µA

ΔIVDD:CK1024

VDD = 3.0 V, FCLKOUT = 1024 Hz,

CL = 10 pF

30

nA

ΔIVDD:CK1

VDD = 3.0 V, FCLKOUT = 1 Hz,

CL = 10 pF

0.03

nA

DC Characteristics (TA = -40 to +85°C unless otherwise indicated. VDD = 1.5 to 5.5V, FOSC = 32.768kHz, TYP values at 25°C

and 3.0V)