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ISL12022MIBZ датащи(PDF) 1 Page - Renesas Technology Corp |
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ISL12022MIBZ датащи(HTML) 1 Page - Renesas Technology Corp |
1 / 32 page FN6668 Rev 9.00 Page 1 of 32 June 20, 2012 FN6668 Rev 9.00 June 20, 2012 ISL12022M Low Power RTC with Battery Backed SRAM, Integrated ±5ppm Temperature Compensation and Auto Daylight Saving DATASHEET The ISL12022M 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. Related Literature •See AN1549 “Addressing Power Issues in Real Time Clock Applications” 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 Applications • Utility Meters •POS Equipment • Printers and Copiers • Digital Cameras FIGURE 1. TYPICAL APPLICATION CIRCUIT FIGURE 2. OSCILLATOR ERROR vs TEMPERATURE NC 1 NC 2 NC 3 NC 4 NC 5 GND 6 VBAT 7 GND 8 NC 9 NC 10 SDA 11 SCL 12 IRQ/ 13 VDD 14 ISL12022M GND 15 NC 16 NC 17 NC 18 NC 19 NC 20 3.3V R1 10k R2 10k R3 10k C1 0.1µF BAT54 SDA SCL MCU GND INTERFACE VDD BATTERY 3.0V C2 0.1µF SCHOTTKY DIODE IRQ/FOUT FOUT -5 -4 -3 -2 -1 0 1 2 3 4 5 -40 -20 0 20406080 TEMPERATURE (°C) VDD = 2.7V VBAT = 5.5V VDD = 3.3V |
Аналогичный номер детали - ISL12022MIBZ |
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Аналогичное описание - ISL12022MIBZ |
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