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Renesas Electronics Components Datasheet

ISL12024IRTC Datasheet

Real-Time Clock/Calendar

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DATASHEET
ISL12024IRTC
Real-Time Clock/Calendar with Embedded Unique ID
FN6749
Rev 1.00
December 15, 2011
The ISL12024IRTCZ 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 device contains a 64-bit unique ID number for security
and product identification applications. It is housed in a tiny
3mmx3mm TDFN package for small handheld applications.
The clock output defaults to 32.768kHz on initial power-up
for low power microcontroller clocking applications. The low
800nA battery supply current extends backup battery life.
Ordering Information
TEMP
PART NUMBER PART
VDD RANGE PACKAGE PKG.
(Note)
MARKING RANGE (°C) (Pb-Free) DWG. #
ISL12024IRTCZ* 024C
2.7V to -40 to +85 8 Ld TDFN L8.3x3I
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.
Pinout
ISL12024IRTCZ
(8 LD TDFN)
TOP VIEW
X1
X2
IRQ/FOUT
GND
1
2
3
4
8 VDD
7 VBAT
6 SCL
5 SDA
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
• Default 32.768kHz Output at IRQ/FOUT
(FO1 = 0, FO0 = 1)
• 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 Interface
- 400kHz Data Transfer Rate
• 800nA Battery Supply Current
• Available in 8 Ld TDFN package
• 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
FN6749 Rev 1.00
December 15, 2011
Page 1 of 24


Renesas Electronics Components Datasheet

ISL12024IRTC Datasheet

Real-Time Clock/Calendar

No Preview Available !

ISL12024IRTC
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
TDFN
SYMBOL
1 X1
2 X2
3 IRQ/FOUT
4 GND
5 SDA
6 SCL
7 VBAT
8 VDD
DESCRIPTION
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.
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.)
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.
Ground.
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.
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).
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.
Power Supply.
FN6749 Rev 1.00
December 15, 2011
Page 2 of 24


Part Number ISL12024IRTC
Description Real-Time Clock/Calendar
Maker Renesas
Total Page 24 Pages
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