4Kb I²C/SMBus EEPROM with Nonvolatile PIO

Multifunction, Integrated Features Reduce Component Count, Save Board Space, and Lower Overall System Cost

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The DS28CZ04 combines 4Kb (512 x 8) EEPROM with 4 PIO lines. Communication with the device is accomplished with an industry standard I²C and SMBus™ interface. The memory is organized as two segments of 256 bytes with single byte and up to 16-byte block write capability. Individual PIO lines may be configured as inputs or outputs. The power-on state of PIO programmed as outputs is stored in nonvolatile memory. All PIO may be reconfigured by the user through the serial interface.
DS28CZ04: Typical Operating Circuit DS28CZ04: Typical Operating Circuit Enlarge+

Key Features

  • 4Kb (512 x 8) EEPROM Organized in Two 256-Byte Blocks
  • Single Byte and up to 16-Byte EEPROM Write Sequences
  • Write-Protect Control Pin for the Entire EEPROM Array
  • Endurance 200k Cycles per Block at 25°C; 10ms max EEPROM Write Cycle
  • 4 PIO Lines
  • Each PIO is Configured to Input or Output Mode on Startup by Stored Value
  • All PIOs are Reconfigurable after Startup
  • Serial Interface User-Programmable for I²C Bus and SMBus Compatibility
  • Supports 100kHz and 400kHz I²C Communication Speeds
  • Operating Range: 2.0V to 5.25V, -40°C to +85°C
  • 4mm x 4mm 12-Pin TQFN Package


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Quality and Environmental Data

Product Reliability Reports: DS28CZ04.pdf 
Lead-Free Package Tin (Sn) Whisker Reports
Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C  

Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

Quality Management System >
Environmental Management System >


Related Resources

Belle Isle 2020
05/29/2020 - 05/31/2020, Detroit, MI
2020 Detroit Grand Prix - Chevrolet Detroit Grand Prix presented by Lear Fast Facts The Chevrolet Detroit Grand Prix presented by Lear was hosted on Belle Isle, May 29 - 30 2020. The event featured the cars of the NTT IndyCar Series, the IMSA WeatherTech SportsCar Championship and the Trans Am Series presented by Pirelli. The weekend is collectively referred to as the Chevrolet Detroit Grand Prix presented by Lear and it once again featured the Chevrolet Dual in Detroit IndyCar doubleheader.