ISL12020 Datasheet PDF - Intersil Corporation
| Part Number | ISL12020 | |
| Description | Low Power RTC | |
| Manufacturers | Intersil Corporation | |
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ISL12020
®
Real Time Clock with On Chip Temp Compensation ±5ppm
Data Sheet
March 29, 2007
FN6450.0
Low Power RTC with VDD Battery Backed
SRAM and Embedded Temp
Compensation ±5ppm with Auto Day Light
Saving
The ISL12020 device is a low power real time clock with an
embedded Temp sensor for oscillator compensation,
clock/calendar, power fail, low battery monitor, brown out
indicator, single periodic or polled alarms, intelligent battery
backup switching and 128 bytes of battery-backed user
SRAM.
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.
Daylight Savings time adjustment is done automatically,
using parameters entered by the user. Power fail and battery
monitors offer user-selectable trip levels. A time stamp
function records the time and date of switchover from VDD to
battery power, and also from battery to VDD power.
Pinoutwww.DataSheet4U.com
ISL12020
(8 LD SOIC)
TOP VIEW
X1
X2
VBAT
GND
1
2
3
4
8 VDD
7 IRQ/FOUT
6 SCL
5 SDA
Features
• Real Time Clock/Calendar
- Tracks Time in Hours, Minutes and Seconds
- Day of the Week, Day, Month and Year
• On-chip Oscillator Compensation Over the Operating
Temp Range
- ±5ppm over -20°C to +70°C
• Day Light Saving Time
- Customer Programmable
• 15 Selectable Frequency Outputs
• 1 Alarm
- Settable to the Second, Minute, Hour, Day of the Week,
Day, or Month
- Single Event or Pulse Interrupt Mode
• Automatic Backup to Battery or Super Cap
- Operation to VBAT = 1.8V
- 1.0µA Battery Supply Current
• Battery Status Monitor, 2 Levels, Selectable by Customer
to:
- Seven Selectable Voltages for Each Level
• Power Status Brown Out Monitor
• Six Selectable Trip Level, from 4.675V to 2.295V Power
Failure Detection
• Time Stamp during Power to Battery and Battery to Power
Cross Over
- Time Stamp. First VDD to VBAT, and Last VBAT to VDD
• 128 Bytes Battery-Backed User SRAM
• I2C Interface
- 400kHz Clock Frequency
• 8 Ld SOIC Package ISL12020
• Pb-Free Plus Anneal Available (RoHS Compliant)
Applications
• Utility Meters
• POS Equipment
• Medical Application
• Security Related Application
• Vending Machine
• White Goods
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.
Copyright Intersil Americas Inc. 2007. All Rights Reserved
All other trademarks mentioned are the property of their respective owners.
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ISL12020
I2C Interface Specifications Test Conditions: VDD=+2.7 to +5.5V, Temperature = -20°C to +70°C, unless otherwise specified. (Continued)
SYMBOL
PARAMETER
TEST CONDITIONS
TYP
MIN (Note 7) MAX UNITS NOTES
tDH Output Data Hold Time
From SCL falling edge
crossing 30% of VDD, until
SDA enters the 30% to 70%
of VDD window.
0
tR SDA and SCL Rise Time
From 30% to 70% of VDD. 20 + 0.1 x Cb
tF SDA and SCL Fall Time
From 70% to 30% of VDD. 20 + 0.1 x Cb
Cb Capacitive loading of SDA or SCL Total on-chip and off-chip
10
ns
300 ns
300 ns
400 pF
RPU
SDA and SCL Bus Pull-up Resistor
Off-chip
Maximum is determined by
tR and tF.
For Cb = 400pF, max is about
2~2.5kΩ.
For Cb = 40pF, max is about
15~20kΩ
1
kΩ
NOTES:
2. Temperature Conversion is inactive below 2.7V VBAT
3. IRQ/FOUT Inactive.
4. VIL = VDD x 0.1, VIH = VDD x 0.9, fSCL = 400kHz
5. VDD > VBAT +VBATHYS
6. Bit BSW = 0 (Standard Mode), VBAT ≥ 1.8V
7. Specified at +25°C.
8. In order to ensure proper timekeeping, the VDD SR- specification must be followed.
9. Parameter is not 100% tested.
10. These are I2C specific parameters and are not tested, however, they are used to set conditions for testing devices to validate specification.
5 FN6450.0
March 29, 2007
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Part DetailsOn this page, you can learn information such as the schematic, equivalent, pinout, replacement, circuit, and manual for ISL12020 electronic component. |
| Information | Total 25 Pages | |
| Link URL | [ Copy URL to Clipboard ] | |
| Download | [ ISL12020.PDF Datasheet ] | |
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