Clocks & Timing

Overview

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.

1338 - Block Diagram

1338 - Block Diagram

1338 - Pinout

1338 - Pinout
1338 - Block Diagram
1338 - Pinout
  • 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)
SMARC SoM Module for RZ MCUs
System on Module (SoM) Solution with RZ/G2E

Documentation

Title Type Date
1338 Datasheet
PDF427 KB
Datasheet
AN-827 Application Relevance of Clock Jitter
PDF1.99 MB
Application Note
AN-828 Termination - LVPECL
PDF322 KB
Application Note
AN-844 Termination - AC Coupling Clock Receivers
PDF170 KB
Application Note
AN-845 Termination - LVCMOS
PDF146 KB
Application Note
AN-842 Thermal Considerations in Package Design and Selection
PDF495 KB
Application Note
AN-840 Jitter Specifications for Timing Signals
PDF442 KB
Application Note
AN-838 Peak-to-Peak Jitter Calculations
PDF115 KB
Application Note
AN-839 RMS Phase Jitter
PDF233 KB
Application Note
AN-815 Understanding Jitter Units
PDF565 KB
Application Note
AN-805 Recommended Ferrite Beads
PDF121 KB
Application Note
1338B-31 Datasheet
PDF541 KB
Datasheet
Errata# : UEN-13-01
PDF421 KB
Datasheet Errata
PLC# : 220001-R1 End-of-Life (EOL) Process on Select Part Numbers
PDF938 KB
End Of Life Notice
PLC# : 220001 End-of-Life (EOL) Process on Select Part Numbers
PDF909 KB
End Of Life Notice
PDN#: CQ-19-04 Product Discontinuance Notice
PDF1010 KB
End Of Life Notice
PDN# : CQ-14-08 Manufacturing Discontinunce PDN
PDF486 KB
End Of Life Notice
IDT Clock Generation Overview
PDF1.83 MB
Overview
PA# : 210014 Change in Quantity per Reel for Select Products from Package Family SOIC-8
PDF89 KB
Product Advisory
Real Time Clocks
PDF441 KB
Product Brief
PCN# : A2003-01 Add Greatek Taiwan as an Alternate Assembly Location on Select Packages
PDF113 KB
Product Change Notice
PCN# : A1602-01(R1) Add Greatek Taiwan as Alternate Assembly
PDF611 KB
Product Change Notice
PCN# : A1602-01 Add Greatek Taiwan as Alternate Assembly
PDF611 KB
Product Change Notice
PCN# : A1403-03 Gold wire to Copper wire
PDF42 KB
Product Change Notice
PCN# : W1101-02R4 Fab 4 to TSMC
PDF70 KB
Product Change Notice
PCN# : W1101-02R3 Fab 4 to TSMC
PDF71 KB
Product Change Notice
PCN# : W1101-02R2 Fab 4 to TSMC
PDF67 KB
Product Change Notice
PCN# : A1208-01R1 Gold to Copper Wire
PDF254 KB
Product Change Notice
PCN# : A1208-06 Changed of Assembly Location and Crystal
PDF1.06 MB
Product Change Notice
PCN# : A1204-01R1 Revised Notification to Remove Selective Devices from TSSOP-16
PDF332 KB
Product Change Notice
info: For device-specific or order-specific documentation, submit a support request.

Design & Development

Software Downloads

Title Type Date
PLC# : 220001-R1 End-of-Life (EOL) Process on Select Part Numbers
PDF938 KB
End Of Life Notice
PLC# : 220001 End-of-Life (EOL) Process on Select Part Numbers
PDF909 KB
End Of Life Notice
PDN#: CQ-19-04 Product Discontinuance Notice
PDF1010 KB
End Of Life Notice
PDN# : CQ-14-08 Manufacturing Discontinunce PDN
PDF486 KB
End Of Life Notice

ECAD Models

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Videos & Training

News & Blog Posts

IDT Introduces Ultra Low Power Timing Solutions for Applications Requiring Stand-Alone Real-Time Clocks News