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 Cap
- Power Failure Detection
- On-Chip Oscillator Compensation
- 8 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
- Pb-Free Plus Anneal Available (RoHS Compliant)
ISL1218 Functional Diagram
Description
The ISL1218 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.
Applications
- Utility Meters
- HVAC Equipment
- Audio/Video Components
- Set Top Box/Television
- Modems
- Network Routers, Hubs, Switches, Bridges
- Cellular Infrastructure Equipment
- Fixed Broadband Wireless Equipment
- Pagers/PDA
- POS Equipment
- Test Meters/Fixtures
- Office Automation (Copiers, Fax)
- Home Appliances
- Computer Products
- Other Industrial/Medical/Automotive
| Part Number | Status | Samples | Stock | RoHS | Package | Lead Count (#) | Carrier Type | Moisture Sensitivity Level (MSL) | Pitch (mm) | Pkg. Dimensions (mm) | Pb (Lead) Free | Pb Free Category | Temp. Range (°C) |
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| ISL1218IBZ | Obsolete | N/A | In Stock | RoHS:EN | SOIC | 8# | Tube | 1 | 1.3mm | 4.9 x 3.9 x 0.00 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +85°C |
| ISL1218IBZ-T | Obsolete | N/A | Out of Stock | RoHS:EN | SOIC | 8# | Reel | 1 | 1.3mm | 4.9 x 3.9 x 0.00 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +85°C |
| ISL1218IUZ | Obsolete | N/A | In Stock | RoHS:EN | MSOP | 8# | Tube | 2 | 0.7mm | 3.0 x 3.0 x 0.00 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +85°C |
| ISL1218IUZ-T | Obsolete | N/A | Out of Stock | RoHS:EN | MSOP | 8# | Reel | 2 | 0.7mm | 3.0 x 3.0 x 0.00 | Yes | Pb-Free 100% Matte Tin Plate w/Anneal-e3 | -40 to +85°C |
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- Product Change NoticePDF 152 KB PCN12085 Nov 07, 2012
- Product Change NoticePDF 117 KB PCN11059 Jun 17, 2011
- Application NotePDF 302 KB an1549 Nov 03, 2007AI-generated Summary: Power issues in real-time clock (RTC) applications include voltage spikes during AC turn-on, power glitches, and low or no battery backup voltage. Adding a medium power Schottky diode at the RTC Vpp pin helps clamp voltage spikes. Battery backup maintains time during power loss but fast glitches can corrupt RAM. Circuit designs with resistors and MOSFETs prevent SRAM corruption during power-up. Proper filtering and power-up delays ensure reliable 12C communication and data integrity.
- Manual - Development ToolsPDF 815 KB an1745 Feb 17, 2008
- DocumentPDF 302 KB tb460 Nov 18, 2005
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- Manual - Development ToolsPDF 815 KB an1745 Feb 17, 2008
Manuals & Guides (2)
- Application NotePDF 302 KB an1549 Nov 03, 2007AI-generated Summary: Power issues in real-time clock (RTC) applications include voltage spikes during AC turn-on, power glitches, and low or no battery backup voltage. Adding a medium power Schottky diode at the RTC Vpp pin helps clamp voltage spikes. Battery backup maintains time during power loss but fast glitches can corrupt RAM. Circuit designs with resistors and MOSFETs prevent SRAM corruption during power-up. Proper filtering and power-up delays ensure reliable 12C communication and data integrity.
Application Notes & White Papers (1)
- Product Change NoticePDF 152 KB PCN12085 Nov 07, 2012
- Product Change NoticePDF 117 KB PCN11059 Jun 17, 2011
Product Notices (PCN, EOL, etc) (4)
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- DocumentPDF 302 KB tb460 Nov 18, 2005
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