Low Power RTC with Battery Backed SRAM and Event Detection

The ISL1221 device is a low power real time clock with Event Detect and Time Stamp function, timing and crystal compensation, clock/calendar, power fail indicator, periodic or polled alarm, intelligent battery backup switching with separate FOUT output and 2 Bytes of battery-backed user SRAM.

Features

? Real Time Clock/Calendar

- Tracks Time in Hours, Minutes, and Seconds

- Day of the Week, Day, Month, and Year

? Security and Event Functions

- Tamper detection with Time Stamp in Normal and Battery Backed modes

- Event Detection During Battery Backed or Normal Modes

- Selectable Event Input Sampling Rates Allows Low Power Operation

- Selectable Glitch Filter on Event Input Monitor

? Separate FOUT pin with 15 Selectable Frequencies

? Single Alarm

- Settable to the Second, Minute, Hour, Day of the Week, Day, or Month

- Single Event or Pulse Interrupt Mode

? Automatic Backup to Battery or Super Cap

? Power Failure Detection

? On-Chip Oscillator Compensation

? 2 Bytes Battery-Backed User SRAM

? I2C Interface

- 400kHz Data Transfer Rate

? 400nA Battery Supply Current

? Small Package

- 10 Ld MSOP

? Pb-Free (RoHS Compliant)

Applications

? Utility Meters

? Set Top Box/Modem

? POS Equipment

? Network Routers, Hubs, Switches, Bridges

? Cellular Infrastructure Equipment

? Fixed Broadband Wireless Equipment

? Test Meters/Fixtures

? Vending Machine Management

? Security and Anti Tampering Applications

- Panel/Enclosure Status

- Warranty Reporting

- Time Stamping Applications

- Patrol/Security Check (Fire or Light Equipment)

- Automotive Applications

ISL1221屬于集成電路（IC） > 實(shí)時(shí)時(shí)鐘。瑞薩科技有限公司制造生產(chǎn)的ISL1221實(shí)時(shí)時(shí)鐘實(shí)時(shí)時(shí)鐘 (RTC) 為幾乎所有需要保持精確時(shí)間的電子設(shè)備提供時(shí)間和/或日期信息。時(shí)鐘類(lèi)型有二進(jìn)制計(jì)數(shù)器、時(shí)鐘/日歷/監(jiān)控器、歷時(shí)計(jì)時(shí)器、幻時(shí)鐘芯片、便攜式系統(tǒng)控制器、溫度記錄器、時(shí)間事件記錄器和計(jì)時(shí)器時(shí)鐘外設(shè)。其包含 2 B 至 2 MB 不等的存儲(chǔ)器，接口選項(xiàng)有 I2C、并行、串行、SPI、1 線式、2 線式、3 線式和 4 線式。