ISL12020M_11 Datasheet, PDF (3/6 Pages) Intersil Corporation – High-Accuracy RTC Modules, Feature-Rich RTCs

INTERSIL SELECTION GUIDE
REAL TIME CLOCK ICs
High-Accuracy RTC Modules
RTC Modules
with Embedded
Crystal and
Temp Comp
ISL12020M,
ISL12022M
Tiny RTC Module with Embedded
Crystal and Temperature Sensor
Achieves Better Than ±5.0ppm
Accuracy
Tiny Real Time Clock (RTC) module with
embedded crystal and temperature
compensation circuitry achieves better than
±5 ppm accuracy over the entire industrial
temperature range (-40°C to +85°C). Intersil
is the first to offer an RTC module in a DFN
package. This makes this module very attractive
for handheld and portable applications that have
stringent space requirements.
Key Features
• ISL12020M: World’s smallest 3-in-1 RTC Module
-- RTC + crystal + temperature sensor
-- Available in DFN package
• Better than ±5.0ppm accuracy for industrial
temperature range
-- Factory programmed for optimal accuracy
• Battery Reseal™ function extends battery shelf
life
• ISL12022M: Low-cost SOIC package
-- Industrial: Utility meters, POS, instruments
-- Consumer: GPS handhelds, cameras, copiers
• Stand-alone RTC with temperature sensor also
available (ISL12022, ISL12023)
block diagram
Embedded Crystal
ISL12022M
Embedded Temperature
Sensor
2.7V to 5.5V
V_DD
1.8V to 5.5V
V_BAT
Battery or
Super Cap
Crystal
Oscillator
Frequency
Control
Power Control
POR
V_TRIP
±
Switch
Temp
Sensor
Compen-
sation
Registers
Single
Alarm
Brown-out
Alarm
Battery
ReSeal™
Clock
Calendar
Battery-
backed
User SRAM
I²C
µP
IRQ/F_OUT
High Accuracy Even in Extreme Temperature
Conditions
0.0
-20.0
-40.0
-60.0
-80.0
-100.0
-120.0
-140.0
-160.0
-40
ISL12020M Compensated
Crystal Drift
Uncompensated Crystal Drift
-20 0 20 40 60 80 100
Temperature (°C)
10.00
8.00 _{Better than ±5.0ppm}
6.00
4.00
over -40 to +85°C!
2.00
0.00
-2.00
-4.00
-6.00
-8.00
-10.00
-50 -30 -10 10
30 50
70
90
Temperature (°C)
High-Accuracy RTC Modules
With Embedded Crystal and Temperature Compensation
Device
I_BAT
(nA) Alarms
Selectable
Frequency
Output
CPU Supervisory
Function
Watchdog
POR Timer
Battery
Seal Backup
ISL12020M 1000
1
15
N
N
Y
Y
ISL12022M 1000
1
15
N
N
Y
Y
ISL12022MA 1000
1
15
N
N
Y
Y
ISL12022M
-R5421
1000
1
15
N
N
Y
Y
IRQ F_OUT
Shared Pin
Shared Pin
Shared Pin
Shared Pin
SRAM
Other Functions
Package
• Battery Switchover Time Stamp
128 Bytes
• Battery Status Monitor
20 Ld DFN
• Battery Switchover Time Stamp
128 Bytes
• Battery Status Monitor
20 Ld SOIC
• Enhanced Environmental Moisture Tolerance
128 Bytes ^{• 100% Pin Compatible with ISL12022M}
• Firmware Compatible with ISL12020M and
ISL12022M
Enhanced
20 Ld SOIC
• Enhanced ESD Performance
128 Bytes ^{• 100% Pin Compatible with ISL12022M}
• Firmware Compatible with ISL12020M and
ISL12022M
Enhanced
20 Ld SOIC
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