Real-Time Clock With Battery Backed Non-Volatile RAM
Jump to Page Section:
Back to top
Explore ECAD Models
Overview
Description
The 1338 is a serial real-time clock (RTC) device that consumes ultra-low power and provides a full binary-coded decimal (BCD) clock/calendar with 56 bytes of battery backed Non-Volatile Static RAM. The clock/calendar provides seconds, minutes, hours, day, date, month, and year information. The clock operates in either the 24-hour or 12-hour format with AM/PM indicator. The end of the month date is automatically adjusted for months with fewer than 31 days, including corrections for leap year. Access to the clock/calendar registers is provided by an I2C interface capable of operating in fast I2C mode. Built-in Power-sense circuitry detects power failures and automatically switches to the backup supply, maintaining time and date operation.
Features
- Real-Time Clock (RTC) counts seconds, minutes, hours, day, date, month, and year with leap-year compensation valid up to 2100
- 56-Byte battery-backed Non Volatile RAM for data storage
- Fast mode I2C Serial interface
- Automatic power-fail detect and switch circuitry
- Programmable square-wave output
- Packaged in 8-pin MSOP, 8-pin SOIC, or 16-pin SOIC (surface-mount package with an integrated crystal)
- Industrial temperature range (-40°C to +85°C)
Applications
Documentation
| Title | Type | Date | |
|---|---|---|---|
PDF427 KB
|
Datasheet
|
||
PDF1.99 MB
|
Application Note
|
||
PDF322 KB
|
Application Note
|
||
PDF170 KB
|
Application Note
|
||
PDF146 KB
|
Application Note
|
||
PDF495 KB
|
Application Note
|
||
PDF442 KB
|
Application Note
|
||
PDF115 KB
|
Application Note
|
||
PDF233 KB
|
Application Note
|
||
PDF565 KB
|
Application Note
|
||
PDF121 KB
|
Application Note
|
||
PDF541 KB
|
Datasheet
|
||
PDF421 KB
|
Datasheet Errata
|
||
PDF938 KB
|
End Of Life Notice
|
||
PDF909 KB
|
End Of Life Notice
|
||
PDF1010 KB
|
End Of Life Notice
|
||
PDF486 KB
|
End Of Life Notice
|
||
PDF1.83 MB
|
Overview
|
||
PDF89 KB
|
Product Advisory
|
||
PDF441 KB
|
Product Brief
|
||
PDF113 KB
|
Product Change Notice
|
||
PDF611 KB
|
Product Change Notice
|
||
PDF611 KB
|
Product Change Notice
|
||
PDF42 KB
|
Product Change Notice
|
||
PDF70 KB
|
Product Change Notice
|
||
PDF71 KB
|
Product Change Notice
|
||
PDF67 KB
|
Product Change Notice
|
||
PDF254 KB
|
Product Change Notice
|
||
PDF1.06 MB
|
Product Change Notice
|
||
PDF332 KB
|
Product Change Notice
|
Design & Development
Software & Tools
Models
ECAD Models
Schematic symbols, PCB footprints, and 3D CAD models from SamacSys can be found by clicking on products in the Product Options table. If a symbol or model isn't available, it can be requested directly from the website.
Product Options
Processing table
Part Number |
Core Voltage (V) |
Pkg. Type |
Lead Count (#) |
Temp. Grade |
Pb (Lead) Free |
Carrier Type |
Buy / Sample |
|---|---|---|---|---|---|---|---|
| 2.5, 3.3, 5, 5.5 | SOIC | 8 | I | Yes | Tube | Get Samples, | |
| 2.5, 3.3, 5, 5.5 | SOIC | 8 | I | Yes | Reel | ||
| 2.5, 3.3, 5, 5.5 | TSSOP | 8 | I | Yes | Tube | Get Samples, | |
| 2.5, 3.3, 5, 5.5 | TSSOP | 8 | I | Yes | Reel |
Tips for Using This Parametric Table:
- Hide Filters button in header: Collapse or expands filters
- Column sort buttons in header: Sort Column alphabetically / numerically descending or ascending
- Reset button in header: Reset all filters to the page default
- Full Screen button in header: Expand the table to full screen view (user must close out of full screen before they can interact with rest of page)
- Export button in header: Export the filtered results of the table to an Excel document
- Filter parts search bar in header: Type to filter table results by part number
- Hide column button in column headers: Select to hide columns in table
- AND / OR toggle switches in header: Toggles the logic of this particular filter to be “AND” or “OR” logic for filtering results
- Multiselect checkboxes at beginning of each row in table: Select these checkboxes to compare products against each other
- Document icon next to product name in row: View the featured document for this product
- Chip icon next to the right of the document icon in row: View the block diagram for this product
- Cart icon to the right of the chip icon: Indicates that samples are available for this product