ISL28127_12 Datasheet, PDF (10/44 Pages) Intersil Corporation – Providing high-performance solutions for every link in the signal chain

►Low-Cost, Low-Power
World’s Smallest, Low
Cost and Low Power
RTC
Key Features
• Low Power
-- Time keeping current = 650nA max @ 1.8V
• Ideal for Portable Applications
-- Operates over 1.4V to 3.6V supplies
• 56% Smaller than Competitive Solutions
-- 8-µTDFN (2x2x0.55mm)
• Easy to Design-in
-- Pin-to-pin replacement: 8-tDFN (3x3mm), 8-MSOP,
8-SOIC
• User Programmability
-- I²C interface
-- Selectable frequency outputs and alarms
• See Also:
-- ISL12057 (uses crystal: 6pF || load capacitance)
-- ISL12059 (F_OUT = 512Hz, no alarm)
Low-Cost, Low-Power RTC: ISL12058
Add Battery Backup to a Low Cost RTC
Without a V_BAT Input
V_IN = 3.3V
BAT54C
V_BAT =3V
ISL12058
V_DD
0.1µF
GND
Device
Selectable
I_BAT
Frequency
(nA) Alarms Output
With Battery Backup
ISL12008
800
1
1
With Battery Backed SRAM
CPU Supervisory
Function
POR Watchdog Timer
Battery
Seal Backup
N
N
Y
Y
ISL1208
400
1
15
N
N
Y
Y
ISL1218
400
1
15
N
N
ISL1220
400
1
15
N
N
With Battery Backed SRAM and Event Detection
ISL1209
400
1
15
N
N
Y
Y
Y
Y
Y
Y
ISL1219
400
1
15
N
N
Y
Y
ISL1221
400
1
15
N
With IRQs, Alarm and Timer
ISL12057
400
2
4
N
N
Y
Y
N
N
N
IRQ
F_OUT
-
Dedicated Pin
Shared Pin
Shared Pin
Dedicated Pin Dedicated Pin
Shared Pin
Shared Pin
Dedicated Pin Dedicated Pin
Shared Pin
SRAM
Other
Functions
2 Bytes
8 Bytes
8 Bytes
2 Bytes
2 Bytes
2 Bytes
• Event Detect
• Event Detect
• Time Stamp
• Event Detect
• Time Stamp
N • 3V
ISL12058
400
2
ISL12059
400
0
ISL12082
800
1
4
N
1
N
4
N
N
N
N
Shared Pin
N • 3V
N
N
N
Shared Pin
N • 3V
N
Y
Y
Dedicated Pin Dedicated Pin
N
• Alarm
• Timer
Package
8 Ld SOIC
8 Ld MSOP, 8 Ld SOIC,
8 Ld TDFN
8 Ld MSOP, 8 Ld SOIC
10 Ld MSOP
10 Ld MSOP
10 Ld MSOP
10 Ld MSOP
8 Ld SOIC, 8 Ld MSOP,
8 Ld TDFN
8 Ld SOIC, 8 Ld MSOP,
8 Ld TDFN, 8 Ld
µTDFN
8 Ld SOIC
10 Ld MSOP, 8 Ld SOIC
10
Intersil Signal Path Products  2012  www.intersil.com