ISL12022MA

Low Power RTC Module with Battery Backed SRAM, Integrated ±5ppm Temp Compensation and Crystal

Product Status: Mass Production

OVERVIEW

The ISL12022MA device is a low power real time clock (RTC) with an embedded temperature sensor and crystal. Device functions include oscillator compensation, clock/calendar, power fail and low battery monitors, brownout indicator, one-time, periodic or polled alarms, intelligent battery backup switching, Battery Reseal™ function and 128 bytes of battery-backed user SRAM. Backup battery current draw is less than 1.6µA over the temperature range. The device is offered in a 20 Ld SOIC module that contains the RTC and an embedded 32.768kHz quartz crystal. The calibrated oscillator provides less than ±5ppm drift over the full -40°C to +85°C temperature range.

The RTC tracks time with separate registers for hours, minutes, and seconds. The calendar registers track date, month, year and day of the week and are accurate through 2099, with automatic leap year correction.

Daylight Savings time adjustment is done automatically, using parameters entered by the user. Power fail and battery monitors offer user-selectable trip levels. The time stamp function records the time and date of switchover from VDD to VBAT power, and also from VBAT to VDD power.

The ISL12022MA features enhanced immunity to ESD per the IEC61000-4-2 standard, and also provides improved resistance to system leakage related to environmental moisture.

KEY FEATURES

  • Embedded 32.768kHz Quartz Crystal in the Package
  • 20 Ld SOIC Package (for DFN version, refer to the ISL12020M)
  • Calendar
  • On-chip Oscillator Temperature Compensation
  • 10-bit Digital Temperature Sensor Output
  • 15 Selectable Frequency Outputs
  • Interrupt for Alarm or 15 Selectable Frequency Outputs
  • Automatic Backup to Battery or Supercapacitor
  • VDD and Battery Status Monitors
  • Battery Reseal™ Function to Extend Battery Shelf Life
  • Power Status Brownout Monitor
  • Time Stamp for Battery Switchover
  • 128 Bytes Battery-Backed User SRAM
  • 1.6µA Max Battery Current
  • I2C Bus™
  • RoHS Compliant

BLOCK DIAGRAM

 Block Diagram

PARAMETRICS

Parameters
ISL12022MA
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)
1000
精度
±5 ppm
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
6 Select VTRIP Levels
IRQ_Bar
IRQ_bar/FOUT
FOUT
IRQ_bar/FOUT
RESET_bar
No
振荡器补偿 (ppm)
-336 to +337
SRAM
128 Bytes
其他功能
Battery Switchover Time Stamp,
Battery Status Monitor, Brown-out Alarm, Daylight Savings
内存类型
RAM
总线/输出接口
I2C
守时电流
3.5 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
CAN 采样
YES
温度范围
-40 to +85

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