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Renesas Electronics Components Datasheet

ISL12027 Datasheet

Real Time Clock/Calendar

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ISL12027, ISL12027A
OBSOLETE PRODUCT
NO RECOMMENDED REPLACEMENT
contact our Technical Support Center at
1-888-INTERSIL or www.intersil.com/tsc
Real Time Clock/Calendar with EEPROM
DATASHEET
FN8232
Rev 9.00
September 23, 2015
The ISL12027 device is a low power real time clock with
timing and crystal compensation, clock/calender, power-fail
indicator, two periodic or polled alarms, intelligent battery
backup switching, CPU Supervisor and integrated 512x8-bit
EEPROM, in 16 Byte per page format.
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 ISL12027 and ISL12027A Power Control Settings are
different. The ISL12027 uses the Legacy Mode Setting, and
the ISL12027A uses the Standard Mode Setting.
Applications that have VBAT > VDD will require only the
ISL12027A. Please refer to“Power Control Operation” on
page 15 for more details. Also, please refer to “I2C
Communications During Battery Backup and LVR Operation”
on page 24 for important details.
Pinouts
ISL12027, ISL12027A
(8 LD TSSOP)
TOP VIEW
VBAT
VDD
X1
X2
1
2
3
4
8 SCL
7 SDA
6 GND
5 RESET
ISL12027, ISL12027A
(8 LD SOIC)
TOP VIEW
X1
X2
RESET
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
• 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-bus™ 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
• 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
FN8232 Rev 9.00
September 23, 2015
Page 1 of 29


Renesas Electronics Components Datasheet

ISL12027 Datasheet

Real Time Clock/Calendar

No Preview Available !

ISL12027, ISL12027A
Pin Descriptions
PIN NUMBER
SOIC
TSSOP SYMBOL
BRIEF 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.
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.
3 5 RESET RESET. This is a reset signal output. This signal notifies a host processor that the “watchdog” time period
has expired or that the voltage has dropped below a fixed VTRIP threshold. It is an open drain active LOW
output. Recommended value for the pull-up resistor is 5k. If unused, connect to ground.
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.
Ordering Information
PART
NUMBER
(Notes 1, 2, 3)
PART
MARKING
VBAT TRIP POINT BSW BIT DEFAULT
(V) SETTING
VRESET
VOLTAGE TEMP. RANGE
(V) (°C)
PACKAGE
(Pb-Free)
PKG.
DWG. #
ISL12027IB27Z
12027 IB27Z
ISL12027IB27AZ 12027 IB27AZ
ISL12027IB30AZ 12027 IB30AZ
ISL12027IBZ
12027 IBZ
ISL12027IBAZ
12027 IBAZ
ISL12027IV27Z
2027 I27Z
ISL12027IV27AZ 2027 27AZ
ISL12027IV30AZ 2027 30AZ
ISL12027IVZ (No 2027 IVZ
longer available or
supported)
VDD < VBAT
VDD < VBAT
VDD < VBAT
VDD < VBAT
VDD < VBAT
VDD < VBAT
VDD < VBAT
VDD < VBAT
VDD < VBAT
BSW = 1
BSW = 1
BSW = 1
BSW = 1
BSW = 1
BSW = 1
BSW = 1
BSW = 1
BSW = 1
2.63
-40 to +85 8 Ld SOIC M8.15
2.92
-40 to +85 8 Ld SOIC M8.15
3.09
-40 to +85 8 Ld SOIC M8.15
4.38
-40 to +85 8 Ld SOIC M8.15
4.64
-40 to +85 8 Ld SOIC M8.15
2.63
-40 to +85 8 Ld TSSOP M8.173
2.92
-40 to +85 8 Ld TSSOP M8.173
3.09
-40 to +85 8 Ld TSSOP M8.173
4.38
-40 to +85 8 Ld TSSOP M8.173
ISL12027IVAZ (No 2027 IVAZ
longer available or
supported)
VDD < VBAT
BSW = 1
4.64
-40 to +85 8 Ld TSSOP M8.173
ISL12027AIB27Z 12027A IB27Z
(No longer available
or supported)
VDD < VBAT
BSW = 0
2.63
-40 to +85 8 Ld SOIC M8.15
ISL12027AIV27Z 2027A I27Z
(No longer available
or supported)
VDD < VBAT
BSW =0
2.63
-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 ISL12027, ISL12027A. For more information on MSL please see
techbrief TB363.
FN8232 Rev 9.00
September 23, 2015
Page 2 of 29


Part Number ISL12027
Description Real Time Clock/Calendar
Maker Renesas
PDF Download

ISL12027 Datasheet PDF






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