AB-RTC-TN-32.768kHz-2

Ultra-Low Power RTC Module

Revision: Initial Release

9/9/2025

Page 1

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Description



Very low power consumption: 240 nA @ 3V



Time accuracy: ±3 ppm @ -40°C to 85°C



External Event Input with Interrupt and Time Stamp function



Wide operating voltage range: 1.5V to 5.5V



Integrated CMOS Oscillator with 32.768kHz crystal resonator



Factory calibrated temperature compensation



Internal Power-On Reset (POR)



Alarm Interrupts for second, minutes, hour, date and weekday



Automatic leap year calculation (2000 to 2099)



Clock output: 32.768 kHz, 1.024 Hz, and 1 Hz



I2C-bus interface: 400 kHz



REACH/RoHS II Compliant | MSL Level 1

Features

Typical Applications



IoT Metering



Industrial



Health Care



Wearables/Portables

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNIT

VDD

Power Supply Voltage

-0.3

6.0

V

VI

Input voltage

Input Pin

-0.3

VDD+0.3

V

VO

Output voltage

Output Pin

-0.3

VDD+0.3

V

II

Input current

-10

10

mA

IO

Output current

-10

10

mA

VESD

ESD Voltage

HBM (1)

±2000

V

CDM (2)

±200

V

ILU

Latch-up Current

JEDEC (3)

±100

mA

TOPR

Operating Temperature

-40

85 (4)

°C

TSTO

Storage Temperature

-55

125

°C

TPEAK

Maximum reflow condition

JEDEC J-STD-020C

265

°C

Note 1:

HBM: Human Body Model, according to JESD22-A114.

Note 2:

MM: Machine Model, according to JESD22-A115.

Note 3:

Latch-up testing, according to JESD78., Class I (room temperature), level A (100 mA).

Note 4:

Supports extended operating temperature range from +85°C to +105°C with limitations.

Absolute Maximum Ratings according to IEC 60134(4):

Abracon’s ultra-low power Real-Time Clock (RTC) module with embedded 32.768 kHz crystal, AB-

RTC-TN-32.768kHz-2, uses an I2C communication interface to configure numerous features while

sustaining temperature compensated frequency accuracy (±3ppm over -40°C to 85°C) in a compact

lead-free ceramic SMD 3.2 x 1.5 mm package. These features include a periodic time update interrupt

function, low voltage detection, external event input with interrupt and internal power-on reset function.

The RTC has a broad operating power supply voltage range of 1.5V to 5.5V with low power consumption

(240nA @ 3V).