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ISL12022MIBZ データシート(PDF) 1 Page - Intersil Corporation

部品番号 ISL12022MIBZ
部品情報  Low Power RTC with Battery Backed SRAM,Integrated 짹5ppm Temperature Compensation and Auto Daylight Saving
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メーカー  INTERSIL [Intersil Corporation]
ホームページ  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

ISL12022MIBZ データシート(HTML) 1 Page - Intersil Corporation

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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. 2008, 2009, 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
ISL12022M
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.
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 page 30)
•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*(see page 30)
• Utility Meters
•POS Equipment
• Printers and Copiers
•Digital Cameras
Typical Application Circuit
Performance Curve
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/FOUT 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
-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
June 4, 2010
FN6668.7


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