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ISL12022MA датащи(PDF) 1 Page - Intersil Corporation |
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ISL12022MA датащи(HTML) 1 Page - Intersil Corporation |
1 / 29 page 1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc. I2C Bus is a registered trademark owned by NXP Semiconductors Netherlands, B.V. Copyright Intersil Americas Inc. 2010. All Rights Reserved. All other trademarks mentioned are the property of their respective owners. Low Power RTC with Battery Backed SRAM, Integrated ±5ppm Temperature Compensation and Auto Daylight Saving ISL12022MA 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. 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. Related Literature •See TB484 “ISL12022MA Enhanced RTC Module” •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 •I2C-Bus™ • RoHS Compliant Applications • Utility Meters •POS Equipment • Printers and Copiers •Digital Cameras Typical Application Circuit Performance Curve GND GND GND GND GND GND GND NC NC NC NC NC VBAT VDD GND IRQ/FOUT NC NC SCL SDA ISL12022MA 1 2 3 4 5 6 7 8 9 10 20 19 18 17 16 15 14 13 12 11 SCHOTTKY DIODE BAT54 BATTERY 3.0V 3.3V C2 0.1µF C1 0.1µF R1 10k R2 10k R3 10k VDO SCL SDA GND MCU INTERFACE IRQ/FOUT -5 -4 -3 -2 -1 0 1 2 3 4 5 -40 -20 0 2040 6080 TEMPERATURE (°C) VDD = 2.7V VBAT = 5.5V VDD = 3.3V OSCILLATOR ERROR vs TEMPERATURE July 9, 2010 FN7575.1 |
Аналогичный номер детали - ISL12022MA_10 |
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Аналогичное описание - ISL12022MA_10 |
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