ISL1220

Low Power RTC with 8 Bytes of Battery Backed SRAM and Separate FOUT

Product Status: Mass Production(*)

OVERVIEW

The ISL1220 device is a low power real time clock with timing and crystal compensation, clock/calendar, power fail indicator, periodic or polled alarm, intelligent battery backup switching, battery-backed user SRAM and separate FOUT and IRQ outputs.

The oscillator uses an external, low-cost 32.768kHz crystal. The real time clock tracks time with separate registers for hours, minutes, and seconds. The device has calendar registers for date, month, year and day of the week. The calendar is accurate through 2099, with automatic leap year correction.

KEY FEATURES

  • Real Time Clock/Calendar
  • Tracks Time in Hours, Minutes, and Seconds
  • Day of the Week, Day, Month, and Year
  • Frequency Output pin
  • 15 Selectable Output Frequencies
  • Single Alarm with Separate Interrupt pin
  • 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
  • 8 Bytes Battery-Backed User SRAM
  • I2C Interface
  • 400kHz Data Transfer Rate
  • 400nA Battery Supply Current
  • Small Package Option
  • 10 Ld MSOP Package
  • Pb-Free Plus Anneal Available (RoHS Compliant)

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL1220
Basic Information
生产状态
Mass Production(*)
供电电压Vcc (最小值) (V)
2.7
供电电压Vcc (最大值) (V)
5.5
VBAT (最小值)
1.8 V
VBAT (最大值)
5.5 V
IBAT (nA)
400
警报
1
晶体频率微调
Yes
可选频率输出
15
CPU监控功能POR
No
CPU监控功能看门狗定时器
No
电池密封
Yes
备用电池
Yes
POR的VTRIP
Yes
IRQ_Bar
IRQ_bar
FOUT
FOUT
RESET_bar
No
振荡器补偿 (ppm)
-94 to +140
SRAM
8 Bytes
内存类型
RAM
总线/输出接口
I2C
守时电流
1.2 µA
IRQ引脚
Yes
频率输出引脚
Yes
定时器
No
篡改检测
No
复位
No
资质级别
Standard
电池电压范围 (V)
1.8 to 5.5
供电电压Vcc范围 (V)
2.7 to 5.5
温度范围
-40 to +85

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