ISL12026A

Real Time Clock/Calendar with I<sup>2</sup>C Bus™ and EEPROM

OVERVIEW

The ISL12026 and the ISL12026A devices are micro power real time clocks with timing and crystal compensation, clock/calender, power-fail indicator, two periodic or polled alarms, intelligent battery backup switching, and integrated 512x8-bit EEPROM configured in 16 Bytes per page.

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.

The ISL12026 and ISL12026A have different types of Power Control Settings. The ISL12026 uses the Legacy Mode Setting, which follows conditions set in X1226 products. The ISL12026A uses the Standard Mode Setting. Please refer to "Power Control Operation" on page 13 for more details. Also, please refer to "I2 C Communications During Battery Backup" on page 22 for important details.

KEY FEATURES

  • Real Time Clock/Calendar
  • Tracks Time in Hours, Minutes and Seconds
  • Day of the Week, Day, Month and Year
  • 3 Selectable Frequency Outputs
  • Two Non-Volatile Alarms
  • Settable on the Second, Minute, Hour, Day of the Week, Day or Month
  • Repeat Mode (Periodic Interrupts)
  • Automatic Backup to Battery or SuperCap
  • On-Chip Oscillator Compensation
  • Internal Feedback Resistor and Compensation Capacitors
  • 64 Position Digitally Controlled Trim Capacitor
  • 6 Digital Frequency Adjustment Settings to ±30ppm
  • 512x8 Bits of EEPROM
  • 16-Byte Page Write Mode (32 total pages)
  • 8 Modes of BlockLock™ Protection
  • Single Byte Write Capability
  • High Reliability
  • Data Retention: 50 years
  • Endurance: >2,000,000 Cycles Per Byte
  • I2C Interface
  • 400kHz Data Transfer Rate
  • 800nA Battery Supply Current
  • Package Options
  • 8 Ld SOIC and 8 Ld TSSOP Packages
  • Pb-Free (RoHS Compliant)

PARAMETRICS

Parameters
ISL12026A
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)
850
警报
2
晶体频率微调
Yes
可选频率输出
3
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
IRQ_Bar
IRQ_bar/FOUT
FOUT
IRQ_bar/FOUT
RESET_bar
No
振荡器补偿 (ppm)
-64 to +110
SRAM
512x8-Bit EEPROM
内存类型
EEPROM
总线/输出接口
I2C
守时电流
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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