DS1312 overview
DS1312 is a component documented by Dallas Semiconductor. The PDF description identifies it as "Nonvolatile Controller with Lithium Battery Monitor." This guide condenses the most useful engineering information from the available PDF so that designers and sourcing teams can identify the checks that still need confirmation in the original document.
Datasheet snapshot
- Manufacturer: Dallas Semiconductor
- Part number: DS1312
- Category: IC
- Datasheet length: 11 Pages
Specifications and operating details
The following points were extracted from the PDF text. Check the associated conditions, notes and limits in the complete document before using a value in a design.
- Incoming power is monitored for an out- of-tolerance condition.
- V CCI is constantly monitored, and when the supply goes out of tolerance, a precision comparator detects power failure and inhibits chip enable output ( CEO ) in order to write-protect the SRAM.
- This is accomplished by holding CEO to within 0.2 volts of V CCO when V CCI is out of tolerance.
- If CEI is not brought high by 1.5 µs after power failure is detected, CEO is forced high at that time.
- This specific scheme for delaying write protection for up to 1.5 µs guarantees that any memory access in progress when power failure occurs will complete properly.
- Power failure detection occurs in the range of 4.75 to 4.5 volts (5% tolerance) when the TOL pin is wired to GND or in the range of 4.5 to 4.25 volts (10% tolerance) when TOL is connected to V CCO.
- These varieties detect out-of-tolerance power supply conditions and warn a processor-based system of impending power failure.
Topics covered by the datasheet
The document includes sections related to:
- FEATURES
- DESCRIPTION
Engineering review checklist
- Confirm supply rails, clock limits, memory size, peripheral mapping and I/O voltage compatibility.
- Check package pinout, boot configuration, programming interface and silicon-revision errata.
- Budget decoupling, thermal margin, startup timing and firmware recovery behavior before release.
Always confirm values against the latest manufacturer-controlled datasheet, especially when qualifying a substitute or releasing a production BOM.
View the complete PDF and model record
Open the DS1312 datasheet and model details to review the complete PDF, document pages and available product information.
Source attribution
Adapted from the PDF associated with this DigiCamel model page.
Source model URL: https://www.digicamel.com/product.php?slug=ds1312-dallas-semiconductor