Overview
Description
The ISL1208 device is a low-power real-time clock with timing and crystal compensation, clock/calendar, power fail indicator, periodic or polled alarm, intelligent battery backup switching and battery-backed user SRAM. 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.
Features
- Real-Time Clock/Calendar
- Tracks Time in Hours, Minutes, and Seconds
- Day of the Week, Day, Month, and Year
- 15 Selectable Frequency Outputs
- Single Alarm
- Settable to the Second, Minute, Hour, Day of the Week, Day, or Month
- Single Event or Pulse Interrupt Mode
- Automatic Backup to Battery or Super Capacitor
- Power Failure Detection
- On-Chip Oscillator Compensation
- 2 Bytes Battery-Backed User SRAM
- I2C Interface
- 400kHz Data Transfer Rate
- 400nA Battery Supply Current
- Same Pin Out as ST M41Txx and Maxim DS13xx Devices
- Small Package Options
- 8 Ld MSOP and SOIC Packages
- 8 Ld TDFN Package
- Pb-Free Available (RoHS Compliant)
Comparison
Applications
Design & Development
Software & Tools
Boards & Kits
Evaluation
ISL120x Real Time Clock USB Evaluation System
This evaluation system is a hardware and software platform for testing Renesas real-time clock (RTC) devices; the system requires only a PC for the controller and power functions. Renesas offers a large portfolio of RTC devices with features including a crystal oscillator, clock and date...
Recommended Documents:
Evaluation
VC4
Active
Vehicle Computer Generation 4
The VC4 is based on a complete Renesas chipset. The centerpiece is the R-Car S4 with 8x Cortex®A55 cores, 1x Cortex® R52 core 2x RH850 G4MH delivering up to 27K DMIPS application performance plus >5.3K DMIPS lock step real-time performance. It incorporates an 8MB SRAM to execute code on the...
Recommended Documents:
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on the CAD Model links in the Product Options table. If a symbol or model isn't available, it can be requested directly from SamacSys.
Product Options
Applied Filters:
Support
Support Communities
Get quick technical support online from Renesas Engineering Community technical staff.
Support Communities
-
ISL12082 sub-second on time re-setting
The sub-second register for the ISL12082 is read-only. If I want to re-synchronize the RTC to a given time, does the SS register clear itself when I write to the other RTC registers or is there another way to synchronize the ISL12082 to another clock to the ...
Jun 26, 2020 -
isl1208时钟芯片使用外部晶振无法正常工作
... 环境你好，我使用的是esp32-s3为主控芯片，在使用isl1208实时时钟时，isl1208的X1,X2引脚连接的外部32.768频率的外部晶振，用于给ISL1208输 ...
Oct 12, 2024 -
ISL1208 Real Time Clock (RTC) runs slower in battery mode but runs accurate when voltage source (Vdd) is present on the device
I cannot figure out the issue why when the device is turned off and the RTC is relying on battery, the time is slower. For example the time programmed is 03:00:00 (HH:MM:SS) on the device. If I wait 5 minutes, the time will be 03:05 ...
Sep 14, 2022
FAQs
-
Are your RTCs compliant with UL60950-1?
Question:Is the ISL1208 in compliance with UL60950-1 (for the RTC protection on IC)? Answer: None of our RTCs are UL listed. We have an app note that may assist you, AN1373. Refer to the section "UL Listing". "If a series Schottky diode is added to the VBAT input ...
Jan 1, 1970