ISL12021CVZ

ISL12021CVZ Datasheet

ISL12021

Part	Datasheet
ISL12021CVZ	ISL12021CVZ (pdf)

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ISL12021 Real Time Clock with On Chip Temp Compensation ±5ppm Data Sheet March 30, 2007 FN6451.0 Low Power RTC with VDD Battery Backed SRAM and Embedded Temp Compensation ±5ppm with Auto Day Light Saving The ISL12021 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. Pinout ISL12021 14 LD TSSOP TOP VIEW VBAT LVRST 14 NC 12 IRQ 11 SCL 10 SDA FOUT • 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 • Separate FOUT pin - 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 - Dedicated IRQ output pin • 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 - Separate Low Voltage LVRST pin • 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 • 14 Ld TSSOP package • Pb-Free Plus Anneal Available RoHS Compliant • Utility Meters • POS Equipment • Medical Application • Security Related Application • Vending Machine • White Goods 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. Ordering Information PART NUMBER Note Coming Soon ISL12021IVZ* PART MARKING 12021 IVZ VDD RANGE 2.7V to 5.5V TEMP RANGE °C -40 to +85 PACKAGE Pb-free 14 Ld TSSOP PKG DWG # M14.173 ISL12021CVZ* 12021 CVZ 2.7V to 5.5V -20 to +70 14 Ld TSSOP M14.173 *Add “-T” suffix for tape and reel. NOTE Intersil Pb-free plus anneal products employ special Pb-free material sets molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020. Block Diagram SDA SCL SDA BUFFER SCL BUFFER I2C INTERFACE CONTROL LOGIC REGISTERS X1 X2 VDD VTRIP VBAT GND CRYSTAL OSCILLATOR RTC DIVIDER FREQUENCY OUT SWITCH INTERNAL SUPPLY ALARM BR. OUT. ALM. SECONDS MINUTES HOURS DAY OF WEEK DATE MONTH YEAR CONTROL REGISTERS USER SRAM FOUT LVRST Pin Descriptions PIN NUMBER

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ISL12021

Real Time Clock with On Chip Temp Compensation ±5ppm

Data Sheet

March 30, 2007

FN6451.0

Low Power RTC with VDD Battery Backed SRAM and Embedded Temp Compensation ±5ppm with Auto Day Light Saving

The ISL12021 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.

Pinout

ISL12021 14 LD TSSOP

TOP VIEW

VBAT

LVRST
14 NC
12 IRQ
11 SCL
10 SDA

FOUT
• 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
• Separate FOUT pin - 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
- Dedicated IRQ output pin
• 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 - Separate Low Voltage LVRST pin
• 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
• 14 Ld TSSOP package
• Pb-Free Plus Anneal Available RoHS Compliant
• Utility Meters
• POS Equipment
• Medical Application
• Security Related Application
• Vending Machine
• White Goods

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.
Ordering Information

PART NUMBER Note

Coming Soon ISL12021IVZ*

PART MARKING 12021 IVZ

VDD RANGE 2.7V to 5.5V

TEMP RANGE °C
-40 to +85

PACKAGE Pb-free
14 Ld TSSOP

PKG DWG # M14.173

ISL12021CVZ*
12021 CVZ
2.7V to 5.5V
-20 to +70
14 Ld TSSOP

M14.173
*Add “-T” suffix for tape and reel.

NOTE Intersil Pb-free plus anneal products employ special Pb-free material sets molding compounds/die attach materials and 100% matte tin plate termination finish, which are RoHS compliant and compatible with both SnPb and Pb-free soldering operations. Intersil Pb-free products are MSL classified at Pb-free peak reflow temperatures that meet or exceed the Pb-free requirements of IPC/JEDEC J STD-020.

Block Diagram

SDA SCL

SDA BUFFER

SCL BUFFER

I2C INTERFACE

CONTROL LOGIC

REGISTERS

X1 X2 VDD

VTRIP

VBAT GND

CRYSTAL OSCILLATOR

RTC DIVIDER

FREQUENCY OUT

SWITCH

INTERNAL SUPPLY

ALARM

BR. OUT. ALM.

SECONDS MINUTES HOURS DAY OF WEEK

DATE MONTH YEAR CONTROL REGISTERS USER SRAM

FOUT

LVRST

Pin Descriptions

PIN NUMBER

More datasheets: 1434-1712 | 1434-1212 | 1444-17174 | 1444-17135 | 1444-17154 | 1444-17156 | 1444-9553 | 1444-1053 | 1444-1273 | 1444-1372

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived ISL12021CVZ Datasheet file may be downloaded here without warranties.

Datasheet ID: ISL12021CVZ 639147