ISL78307 Datasheet, PDF (12/20 Pages) Intersil Corporation – Intersil’s Solutions for Industrial Process Control

INTERSIL SELECTION GUIDE | INDUSTRIAL PROCESS CONTROL SOLUTIONS
PLC
Analog Input
Real Time Clock
Analog Output
Control
Sensors
Power
3 in 1 RTC Module
(RTC + Embedded
Crystal + Temp Sensor)
Achieves Better than
±5ppm Accuracy
Key Features
• ±5ppm Accuracy (-40°C to +85°C)
-- Factory Programmed RTC for Optimal Accuracy
-- Onboard Temperature Sensor
-- Embedded Crystal
• Reliable Timekeeping & Power Management
-- Backup Battery Management
-- Vdd and Battery Status Monitors and Switchover
Timestamp
-- Battery Reseal^TM Function Extends Battery Shelf
Life
• User Programmability
-- I²C Interface
-- 128 Bytes Battery-Backed User SRAM
• See Also
-- ISL12020M (DFN 3 in 1); ISL12022 and ISL12023
Standalone RTCs
RTC Modules with Embedded Crystal and Temp Comp: ISL12022M
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
ISL12022M Compensated
Crystal Drift
0.0
-20.0
-40.0
-60.0
-80.0
-100.0
-120.0
-140.0
Uncompensated Crystal Drift
-160.0
-40 -20 0
20 40 60 80 100
Temperature (°C)
Better than ±5.0ppm
over -40 to +85°C!
5
4
3
2
1
0
-1
-2
-3
-4
-5
-40
-20
0
20
40
60
80
TEMPERATURE (°C)
Device
IBAT
Selectable
Frequency
CPU Supervisory
Function
Battery
(nA) Alarms Output POR Watchdog Timer Seal Backup IRQ FOUT
SRAM
Other Functions
ISL12020M
1000
1
15
N
N
Y
Y
Shared Pin
128 Bytes
• Battery Switchover Time Stamp
• Battery Status Monitor
ISL12022M
1000
1
15
N
N
Y
Y
Shared Pin
128 Bytes
• Battery Switchover Time Stamp
• Battery Status Monitor
• Enhanced Environmental MoistureTolerance
ISL12022MA
1000
1
15
N
N
Y
Y
Shared Pin 128 Bytes • Firmware Compatible with ISL12020M and
ISL12022M
• Enhanced ESD Performance
ISL12022M-R5421 1000
1
15
N
N
Y
Y
Shared Pin 128 Bytes • Firmware Compatible with ISL12020M and
ISL12022M
Package
20 Ld DFN
20 Ld SOIC
Enhanced
20 Ld SOIC
Enhanced
20 Ld SOIC
12 | www.intersil.com/industrial_process_control