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AB18XX

Real-Time Clock with Power Management Family

Abracon Corporation 

AB18XX Real-Time Clock with Power

Management Family

Date of Issue: November 7, 2013

3.0 x 3.0 mm

Page 1 of 37

Abracon Drawing #453568

Revision : A

Features

• Ultra-low supply current (all at 3V):

- 14 nA with RC oscillator

- 22 nA with RC oscillator and Autocalibration

- 55 nA with crystal oscillator

• Baseline timekeeping features:

- 32.768 kHz crystal oscillator with integrated

load capacitor/resistor

- Counters for hundredths, seconds, minutes,

hours, date, month, year, century, and week-

day

- Alarm capability on all counters

- Programmable output clock generation

(32.768 kHz to 1 year)

- Countdown timer with repeat function

- Automatic leap year calculation

• Advanced timekeeping features:

- Integrated power optimized RC oscillator

- Advanced crystal calibration to ± 2 ppm

- Advanced RC calibration to ± 16 ppm

- Automatic calibration of RC oscillator to crystal

oscillator

- Watchdog timer with hardware reset

- Up to 256 bytes of general purpose RAM

• Power management features:

- Integrated ~1Ω power switch for off-chip com-

ponents such as a host MCU

- System sleep manager for managing host pro-

cessor wake/sleep states

- External reset signal monitor

- Reset output generator

- Supercapacitor trickle charger with program-

mable charging current

- Automatic switchover to VBAT

- External interrupt monitor

- Programmable low battery detection threshold

- Programmable analog voltage comparator

• I2C (up to 400 kHz) and 3-wire or 4-wire SPI (up

to 2 MHz) serial interfaces available

• Operating voltage 1.5-3.6 V

• Clock and RAM retention voltage 1.5-3.6 V

• Operating temperature –40 to 85 °C

• All inputs include Schmitt Triggers

• 3x3 mm QFN-16 package

Applications

• Smart cards

• Wireless sensors and tags

• Medical electronics

• Utility meters

• Data loggers

• Appliances

• Handsets

• Consumer electronics

• Communications equipment

Description

The ABRACON AB18XX Real Time Clock with

Power Management family provides a

groundbreaking combination of ultra-low power

coupled with a highly sophisticated feature set. With

power requirements significantly lower than any

other industry RTC (as low as 14 nA), these are the

first semiconductors based on innovative SPOTTM

(Subthreshold Power Optimized Technology) CMOS

platform. The AB18XX includes on-chip oscillators to

provide minimum power consumption, full RTC

functions including battery backup and

programmable counters and alarms for timer and

watchdog functions, and either an I2C or SPI serial

interface for communication with a host controller. An

integrated power switch and a sophisticated system

sleep manager with counter, timer, alarm, and

interrupt capabilities allows the AM18XX to be used

as a supervisory component in a host microcontroller

based system.

Disclaimer: AB18XX series of devices are

based on innovative SPOT technology,

proprietary to Ambiq Micro.

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