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Renesas Electronics Components Datasheet

ISL12026A Datasheet

Real Time Clock/Calendar

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DATASHEET
ISL12026, ISL12026A
Real Time Clock/Calendar with I2C Bus™ and EEPROM
FN8231
Rev 9.00
November 30, 2010
The ISL12026 and the ISL12026A devices are micro power
real time clocks with 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.
The ISL12026 and ISL12026A have different types of Power
Control Settings. The ISL12026 uses the Legacy Mode
Setting, which follows conditions set in X1226 products. The
ISL12026A uses the Standard Mode Setting. Please refer to
“Power Control Operation” on page 13 for more details. Also,
please refer to “I2C Communications During Battery Backup”
on page 22 for important details.
Pinouts
ISL12026, ISL12026A
(8 LD SOIC)
TOP VIEW
X1
X2
IRQ/FOUT
GND
1
2
3
4
8 VDD
7 VBAT
6 SCL
5 SDA
ISL12026, ISL12026A
(8 LD TSSOP)
TOP VIEW
VBAT
VDD
X1
X2
1
2
3
4
8 SCL
7 SDA
6 GND
5 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
• 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 SuperCap
• 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-Byte 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
• Package Options
- 8 Ld SOIC and 8 Ld TSSOP Packages
• Pb-Free (RoHS Compliant)
Applications
• Utility Meters
• HVAC Equipment
• Audio/Video Components
• Set-Top Box/Television
• Modems
• Network Routers, Hubs, Switches, Bridges
• Cellular Infrastructure Equipment
• Fixed Broadband Wireless Equipment
• Pagers/PDA
• POS Equipment
• Test Meters/Fixtures
• Office Automation (Copiers, Fax)
• Home Appliances
• Computer Products
• Other Industrial/Medical/Automotive
FN8231 Rev 9.00
November 30, 2010
Page 1 of 24


Renesas Electronics Components Datasheet

ISL12026A Datasheet

Real Time Clock/Calendar

No Preview Available !

ISL12026, ISL12026A
Ordering Information
PART NUMBER
(Notes 1, 2, 3)
PART
MARKING
VBAT TRIP POINT BSW BIT DEFAULT TEMP RANGE PACKAGE
(V)
SETTING
(°C) (Pb-Free)
PKG.
DWG. #
ISL12026IBZ
ISL12026IVZ
ISL12026AIBZ
12026 IBZ
2026 IVZ
12026A IBZ
VDD < VBAT
VDD < VBAT
2.2
BSW = 1
BSW = 1
BSW = 0
-40 to +85
-40 to +85
-40 to +85
8 Ld SOIC
8 Ld TSSOP
8 Ld SOIC
M8.15
M8.173
M8.15
ISL12026AIVZ
2026A IVZ
2.2
BSW = 0
-40 to +85 8 Ld TSSOP M8.173
NOTES:
1. Add “-T*” suffix for tape and reel. Please refer to TB347 for details on reel specifications.
2. 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.
3. For Moisture Sensitivity Level (MSL), please see device information page for ISL12026, ISL12026A. For more information on MSL please see
techbrief TB363.
Block Diagram
32.768kHz
X1
X2
IRQ/FOUT
SELECT
SCL
SDA
SERIAL
INTERFACE
DECODER
CONTROL
DECODE
LOGIC
8
OSC
COMPENSATION
OSCILLATOR
FREQUENCY 1Hz
DIVIDER
TIMER
CALENDAR
LOGIC
TIME
KEEPING
REGISTERS
(SRAM)
CONTROL/
REGISTERS
(EEPROM)
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 19.)
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 19.)
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.
FN8231 Rev 9.00
November 30, 2010
Page 2 of 24


Part Number ISL12026A
Description Real Time Clock/Calendar
Maker Renesas
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