ISL28127_12 Datasheet, PDF (9/44 Pages) Intersil Corporation – Providing high-performance solutions for every link in the signal chain

► Feature-Rich RTCs
Low Power RTC
with Battery Backed
SRAM and 50/60
Cycle AC Input and
Xtal Back-up
Key Features
• Longer Super Capacitor Life
-- Integrated trickle charger
-- Four selectable charging rates
• Power Failure Safety Feature
-- Dynamically switch from AC clock input to
crystal
• Security and Event Functions
-- Stores first and last three event time stamps
• User Programmability
-- I²C interface
-- 128 bytes battery- backed user SRAM
• See Also
-- ISL12030 (Industry-Standard 8-lead SOIC
package)
Feature-Rich RTC: ISL12032
Feature-Rich RTC with 50/60 Cycle AC Input
Redundant Crystal Input
(ISL12032) for Clock
Dual Alarms
Integrated
Trickle Charger
ISL12032
F_OUT
µP
AC Clock
Crystal
Oscillator
AC Clock
Input
Power
Functions
Power On
Reset
Battery
Status
Monitor
I²C
Serial
Interface
Decoder
VDD Power
Brownout
Monitor
Clock
Calendar
Battery-
backed
User SRAM
Battery Switch
Circuitry &
Trickle Charger
2.7V to 5.5V
VDD
1.8V to 5.5V
VBAT
2 Alarms
Battery or
SuperCap
Event Detect
with Time
Stamp
50/60Hz AC Input
AC input line
provides long term,
high accuracy, and
eliminates the need
for an external crystal.
Dynamically Switch
Device
I_BAT
(nA) Alarms
With 50/60 Cycle AC Input
ISL12030
N/A
2
Selectable
Frequency
Output
N
CPU Supervisory
Function
Watch-
dog
POR Timer
Battery
Seal Backup
N
N
N
N
ISL12032
800
2
7
Y
Y
N
Y
High Precision RTC with On-Chip Temperature Sensor
ISL12022
1000
1
15
N
N
Y
Y
ISL12023
1000
1
15
N
N
Y
Y
With Embedded Unique ID
ISL12024
850
2
3
N
N
Y
Y
ISL12024IRTCZ 850
2
3
N
N
Y
Y
ISL12025
850
2
Y
Y
Y
Y
With Integrated EEPROM and CPU Supervisory Functions
ISL12026
850
2
3
N
N
Y
Y
ISL12026A
850
2
3
N
N
Y
Y
ISL12027
850
2
Y
Y
Y
Y
ISL12028
ISL12029
850
2
3
Y
Y
Y
Y
IRQ
F_OUT
Y
N
Y
Y
Shared Pin
Dedicated Dedicated
Pin
Pin
Shared Pin
Shared Pin
-
-
Shared Pin
Shared Pin
-
-
Shared Pin
SRAM
128 Bytes
128 Bytes
128 Bytes
128 Bytes
512x8-Bit EEPROM
512x8-Bit EEPROM
512x8-Bit EEPROM
512x8-Bit EEPROM
512x8-Bit EEPROM
512x8-Bit EEPROM
512x8-Bit EEPROM
Other Functions
• AC Input
• AC Input
• Crystal Backup
• Trickle Charger
• Battery Switchover Time
Stamp
• Battery Status Monitor
• Battery Switchover Time
Stamp
• Battery Status Monitor
• 64-bit Unique ID
• 64-bit Unique ID
• 64-bit Unique ID
• CPU Supervisor
Package
8 Ld SOIC
14 Ld TSSOP
8 Ld SOIC
14 Ld TSSOP
8 Ld SOIC, 8 Ld TSSOP
8 Ld TDFN
8 Ld SOIC, 8 Ld TSSOP
8 Ld SOIC, 8 Ld TSSOP
8 Ld SOIC, 8 Ld TSSOP
8 Ld SOIC, 8 Ld TSSOP
14 Ld SOIC,
14 Ld TSSOP
Intersil Signal Path Products  2012  www.intersil.com
9