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Renesas Electronics Components Datasheet

ISL12024 Datasheet

Real-Time Clock/Calendar

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DATASHEET
ISL12024
Real-Time Clock/Calendar with Embedded Unique ID
FN6370
Rev 3.00
August 18, 2008
The ISL12024 device is a micro-power real-time clock with
embedded 64-bit unique ID, timing and crystal
compensation, clock/calender, power-fail indicator, two
periodic or polled alarms, intelligent battery backup
switching, and integrated 512x8-bit EEPROM configured in
16 Bytes per page.
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.
Ordering Information
PART
NUMBER
(Note)
TEMP
PART
VDD RANGE PACKAGE PKG.
MARKING RANGE (°C)
(Pb-free) DWG. #
ISL12024IBZ* 12024 IBZ 2.7V to -40 to +85 8 Ld SOIC M8.15
5.5V
ISL12024IVZ* 2024 IVZ 2.7V to -40 to +85 8 Ld TSSOP M8.173
5.5V
*Add “-T” suffix for tape and reel. Please refer to TB347 for details on
reel specifications.
NOTE: These Intersil Pb-free plastic packaged products employ
special Pb-free material sets, molding compounds/die attach
materials, and 100% matte tin plate plus anneal (e3 termination finish,
which is 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.
Pinouts
X1
X2
IRQ/FOUT
GND
ISL12024
(8 LD SOIC)
TOP VIEW
18
27
36
45
VDD
VBAT
SCL
SDA
VBAT
VDD
X1
X2
ISL12024
(8 LD TSSOP)
TOP VIEW
18
27
36
45
SCL
SDA
GND
IRQ/FOUT
Features
• Real-Time Clock/Calendar
- Tracks Time in Hours, Minutes, and Seconds
- Day of the Week, Day, Month and Year
- 3 Selectable Frequency Outputs
• 64-bit Unique ID
• Two Non-Volatile Alarms
- Settable on the Second, Minute, Hour, Day of the Week,
Day or Month
- Repeat Mode (Periodic Interrupts)
• Automatic Backup to Battery or Super Cap
• On-Chip Oscillator Compensation
- Internal Feedback Resistor and Compensation
Capacitors
- 64 Position Digitally Controlled Trim Capacitor
- 6 Digital Frequency Adjustment Settings to ±30ppm
• 512x8-Bits of EEPROM
- 16-Bytes Page Write Mode (32 total pages)
- 8 Modes of BlockLock™ Protection
- Single Byte Write Capability
• High Reliability
- Data Retention: 50 years
- Endurance: 2,000,000 Cycles Per Byte
• I2C Bus™
- 400kHz Data Transfer Rate
• 800nA Battery Supply Current
• Package Options
- 8 Ld SOIC and 8 Ld TSSOP Packages
- Pin-Compatible with the ISL12026
• Pb-Free (RoHS Compliant)
Applications
• Utility Meters
• Audio Video Equipment
• Modems
• Network Routers, Hubs, Switches, Bridges
• Cellular Infrastructure Equipment
• Fixed Broadband Wireless Equipment
• Pagers/PDA
• POS Equipment
• Test Meters/Fixtures
• Office Automation (Copiers, Fax)
• Computer Products
• Security Related Application
FN6370 Rev 3.00
August 18, 2008
Page 1 of 25


Renesas Electronics Components Datasheet

ISL12024 Datasheet

Real-Time Clock/Calendar

No Preview Available !

ISL12024
Block Diagram
OSC
COMPENSATION
32.768kHz
X1
X2
IRQ/FOUT
SELECT
OSCILLATOR
FREQUENCY
DIVIDER
1Hz
TIMER
CALENDAR
LOGIC
TIME
KEEPING
REGISTERS
(SRAM)
SCL
SDA
SERIAL
INTERFACE
DECODER
CONTROL
DECODE
LOGIC
CONTROL/
REGISTERS
(EEPROM)
8
STATUS
REGISTERS
(SRAM)
ALARM
COMPARE
ALARM REGS
(EEPROM)
4k
EEPROM
ARRAY
BATTERY
SWITCH
CIRCUITRY
VDD
VBAT
Pin Descriptions
PIN NUMBER
SOIC
TSSOP SYMBOL
DESCRIPTION
1 3 X1 The X1 pin is the input of an inverting amplifier and is intended to be connected to one pin of an external
32.768kHz quartz crystal. X1 can also be driven directly from a 32.768kHz source. (See “Application Section”
on page 20.)
2 4 X2 The X2 pin is the output of an inverting amplifier and is intended to be connected to one pin of an external
32.768kHz quartz crystal. (See “Application Section” on page 20.)
3 5 IRQ/FOUT Interrupt Output/Frequency Output is a multi-functional pin that can be used as interrupt or frequency
output pin. The function is set via the control register. This output is an open drain configuration.
4 6 GND Ground.
5
7
SDA
Serial Data (SDA) is a bidirectional pin used to transfer serial data into and out of the device. It has an
open drain output and may be wire OR’ed with other open drain or open collector outputs.
6 8 SCL The Serial Clock (SCL) input is used to clock all serial data into and out of the device. The input buffer on
this pin is always active (not gated).
7
1
VBAT
This input provides a backup supply voltage to the device. VBAT supplies power to the device in the event
that the VDD supply fails. This pin should be tied to ground if not used.
8
2
VDD
Power Supply.
FN6370 Rev 3.00
August 18, 2008
Page 2 of 25


Part Number ISL12024
Description Real-Time Clock/Calendar
Maker Renesas
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ISL12024 Datasheet PDF






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