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Renesas Electronics Components Datasheet

ISL12028 Datasheet

Real Time Clock/Calendar

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ISL12028, ISL12028A
OBSOLETE PRODUCT
NO RECOMMENDED REPLACEMENT
contact our Technical Support Center at
1-888-INTERSIL or www.intersil.com/tsc
Real Time Clock/Calendar with I2C Bus™ and EEPROM
DATASHEET
FN8233
Rev 10.00
August 14, 2015
The ISL12028 device is a low power real time clock with
clock/calendar, power-fail indicator, clock output and crystal
compensation, two periodic or polled alarms (CMOS output),
intelligent battery backup switching, CPU Supervisor,
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 ISL12028 and ISL12028A Power Control Settings are
different. The ISL12028 uses the Legacy Mode Setting, and
the ISL12028A uses the Standard Mode Setting.
Applications that have VBAT > VDD will require only the
ISL12028A. Please refer to “Power Control Operation” on
page 14 for more details. Also, please refer to “I2C
Communications During Battery Backup and LVR Operation”
on page 25 for important details.
Pinout
ISL12028, ISL12028A
(14 LD TSSOP, SOIC)
TOP VIEW
X1
X2
NC
NC
NC
RESET
GND
1
2
3
4
5
6
7
14 VDD
13 VBAT
12 IRQ/FOUT
11 NC
10 NC
9 SCL
8 SDA
NC = No internal connection
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
- Power Failure Detection
- 800nA Battery Supply Current
• 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
- Data Retention: 50 years
- Endurance: >2,000,000 Cycles Per Byte
• CPU Supervisor Functions:
- Power On Reset, Low Voltage Sense
- Watchdog Timer (0.25s, 0.75s and 1.75s)
• I2C Interface
- 400kHz Data Transfer Rate
• 14 Ld SOIC and 14 Ld TSSOP Packages
• Pb-Free (RoHS Compliant)
Applications
• Utility Meters
• HVAC Equipment
• Audio/Video Components
• 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
FN8233 Rev 10.00
August 14, 2015
Page 1 of 29


Renesas Electronics Components Datasheet

ISL12028 Datasheet

Real Time Clock/Calendar

No Preview Available !

ISL12028, ISL12028A
Ordering Information
PART NUMBER
(Notes 1, 2, 3)
PART
MARKING
VBAT TRIP
POINT
(V)
BSW BIT
DEFAULT
SETTING
VRESET
VOLTAGE
(V)
TEMP. RANGE
(°C)
PACKAGE
(Pb-free)
PKG.
DWG. #
ISL12028IB27Z
12028IB27Z
ISL12028IBZ
12028IBZ
ISL12028IV27Z
12028 IV27Z
ISL12028IVZ
12028 IVZ
ISL12028AIB27Z
12028AIB 27Z
(No longer available or
supported)
VDD < VBAT
VDD < VBAT
VDD < VBAT
VDD < VBAT
2.2
BSW = 1
BSW = 1
BSW = 1
BSW = 1
BSW = 0
2.63
4.38
2.63
4.38
2.63
-40 to +85
-40 to +85
-40 to +85
-40 to +85
-40 to +85
14 Ld SOIC
14 Ld SOIC
14 Ld TSSOP
14 Ld TSSOP
14 Ld SOIC
M14.15
M14.15
M14.173
M14.173
M14.15
ISL12028AIV27Z
2028A IV27Z
(No longer available or
supported)
2.2 BSW = 0 2.63
-40 to +85 14 Ld TSSOP M14.173
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 ISL12028, ISL12028A. 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
RESET
OSC COMPENSATION
OSCILLATOR
FREQUENCY
DIVIDER
1Hz
TIMER
CALENDAR
LOGIC
TIME
KEEPING
REGISTERS
(SRAM)
CONTROL/
REGISTERS
(EEPROM)
STATUS
REGISTERS
(SRAM)
ALARM
WATCHDOG LOW VOLTAGE
TIMER
RESET
COMPARE
ALARM REGS
(EEPROM)
4k
EEPROM
ARRAY
BATTERY
SWITCH
CIRCUITRY
VDD
VBACK
FN8233 Rev 10.00
August 14, 2015
Page 2 of 29


Part Number ISL12028
Description Real Time Clock/Calendar
Maker Renesas
PDF Download

ISL12028 Datasheet PDF






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