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ISL12020MIRZ Datasheet(PDF) 1 Page - Intersil Corporation

No. de pieza ISL12020MIRZ
Descripción Electrónicos  Low Power RTC with Battery Backed SRAM, Integrated 짹5ppm Temperature Compensation and Auto Daylight Saving
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Fabricante Electrónico  INTERSIL [Intersil Corporation]
Página de inicio  http://www.intersil.com/cda/home
Logo INTERSIL - Intersil Corporation

ISL12020MIRZ Datasheet(HTML) 1 Page - Intersil Corporation

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Low Power RTC with Battery Backed SRAM, Integrated
±5ppm Temperature Compensation and Auto Daylight
Saving
ISL12020M
The ISL12020M 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
DFN 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 DFN Package (for SOIC version, refer to the
ISL12022M)
•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
ISL12020M
3.3V
C1
0.1µF
BAT54
SDA
SCL
GND
VDD
BATTERY
3.0V
C2
0.1µF
SCHOTTKY DIODE
1
2
3
4
5
6
7
8
9
10
X2
X2
X2
X2
X2
NC
VBAT
GND
NC
NC
11
12
13
14
15
16
17
18
19
20
SDA
SCL
VDD
NC
X1
X1
X1
X1
X1
R1
10k
R2
10k
R3
10k
IRQ/FOUT
IRQ/FOUT
MCU
INTERFACE
FIGURE 1. TYPICAL APPLICATION CIRCUIT
CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures.
1-888-INTERSIL or 1-888-468-3774
|Copyright Intersil Americas Inc. 2008-2011. All Rights Reserved
Intersil (and design) is a trademark owned by Intersil Corporation or one of its subsidiaries. I2C Bus™ is a trademark owned by
NXP Semiconductors Netherlands, B.V. All other trademarks mentioned are the property of their respective owners.
December 13, 2011
FN6667.5


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