Memory & Logic

Overview

The X28HC256 is a second generation high performance CMOS 32k x 8 EEPROM. It is fabricated with Intersil’s proprietary, textured poly floating gate technology, providing a highly reliable 5V only nonvolatile memory. The X28HC256 supports a 128-byte page write operation, effectively providing a 24μs/byte write cycle, and enabling the entire memory to be typically rewritten in less than 0. 8s. The X28HC256 also features DATA polling and Toggle bit polling, two methods of providing early end of write detection. The X28HC256 also supports the JEDEC standard software data protection feature for protecting against inadvertent writes during power-up and power-down. Endurance for the X28HC256 is specified as a minimum 100, 000 write cycles per byte and an inherent data retention of 100 years

X28HC256 Functional Diagram
X28HC256 Functional Diagram
  • Access time: 90ns
  • Simple byte and page write
  • Single 5V supply
  • No external high voltages or VP-P control circuits
  • Self timed
  • No erase before write
  • No complex programming algorithms
  • No overerase problem
  • Low power CMOS
  • Active: 60mA
  • Standby: 500μA
  • Software data protection
  • Protects data against system level inadvertent writes
  • High-Speed page write capability
  • Highly reliable Direct Write™ cell
  • Endurance: 100,000 cycles
  • Data retention: 100 years
  • Early end of write detection
  • DATA polling
  • Toggle bit polling
  • RoHS compliant

Documentation

Title Type Date
X28HC256 Datasheet
PDF867 KB
Datasheet
RL78/G14, RL78/G1C, RL78/L12, RL78/L13, RL78/L1C, RL78/G23 Group Clock Synchronous Single Master Control Software Using CSI Mode of Serial Array Unit Rev.1.07
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RX Family, RL78 Family Renesas R1EX24xxx Series Serial EEPROM Control Software Rev.1.03
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RX Family, RL78 Family, 78K0R/Kx3-L Renesas R1EX25xxx Series Serial EEPROM Control Software Rev.1.06
PDF1.79 MB日本語
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RX210, RX21A, RX220, RX63N, RX63T, RX111, RX64M Group Clock Synchronous Single Master Control Software Using the SCI Rev.1.07
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RX600, RX200 Series I²C Bus Single Master Control Software Using RIIC Serial Interface Rev.1.03
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Application Note
Renesas Semiconductor Lead-Free Packages
PDF1.32 MB
Brochure
PLC21060 - End of Life Notice
PDF603 KB
End Of Life Notice
PLC21035 - End of Life Notice
PDF1.17 MB
End Of Life Notice
PLC18009 - Q2 Standard EOL Notice
PDF345 KB
End Of Life Notice
PLC17040 - Product Discontinuance / Obsolescence Notification for Listed Intersil Products
PDF233 KB
End Of Life Notice
PLC17019 - Q2 Cy 17 General PLC Notice
PDF320 KB
End Of Life Notice
EEPROM Part Number Guide
PDF228 KB日本語
Guide
EEPROM Product Outline
PDF1.37 MB日本語
Overview
PIN17006 - Q1 2017 Price Increase
PDF227 KB
Price Increase Notice
Unification of a JEDEC tray and a embossed carrier tape for LQFP package (Additional Information & Correction)
PDF4.86 MB日本語
Product Change Notice
Unification of a JEDEC tray and a embossed carrier tape for LQFP package ( PC-WRP-A001B/E )
PDF3.74 MB日本語
Product Change Notice
Unification of a JEDEC tray and a embossed carrier tape for LQFP package ( PC-WRP-A001A/E )
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Product Change Notice
PCN15015 - Data Sheet & Wafer Fabrication Site Change for Listed Intersil X28HC256* Products
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Product Change Notice
PCN12087 - PLCC w/ Gold Bond Wire from ANST to ATP as Alternate Assembly Site
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Product Change Notice
PCN10077 - Alternate Manufacturing Site for Intersil X28HC256J* and X28HC64J* PLCC Packaged Products - Intersil Milpitas, CA
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Product Change Notice
PCN10056 - Manufacturing Site Change for Assembly of the Listed Intersil 28l PDIP Products - Amkor Philippines (ATP)
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Product Change Notice
Postpone the plan standardize to Halogen-free for Renesas EEPROM molding compound (Correction for TN-PME-A002A/E)
PDF33 KB日本語
Technical Update
Standardize to Halogen-free for Renesas EEPROM molding compound
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Technical Update
Addition of assembly and test line
PDF21 KB日本語
Technical Update
Request for replacement by new products of two wire interface serial EEPROM R1EX24***A series from HN58x24*** series.
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Technical Update

Design & Development

Software Downloads

Title Type Date
PLC21060 - End of Life Notice
PDF603 KB
End Of Life Notice
PLC21035 - End of Life Notice
PDF1.17 MB
End Of Life Notice
PLC18009 - Q2 Standard EOL Notice
PDF345 KB
End Of Life Notice
PLC17040 - Product Discontinuance / Obsolescence Notification for Listed Intersil Products
PDF233 KB
End Of Life Notice
PLC17019 - Q2 Cy 17 General PLC Notice
PDF320 KB
End Of Life Notice

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.

Explore ECAD Models

Product Options

    Processing table
    Part Number
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    X28HC256JIZ-12
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    memory
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    X28HC256JIZ-12T1
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    memory
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    		PLCC Reel 750
    X28HC256JIZ-15
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    memory
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    		 PLCC Tube 480 Get Samples,
    X28HC256JIZ-15T1
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    memory
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    		PLCC Reel 750
    X28HC256JIZ-90
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    		 PLCC Tube 240 Get Samples,
    X28HC256JIZ-90T1
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    memory
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    		PLCC Reel 750
    X28HC256JZ-12
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    memory
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    Samples Available
    		 PLCC Tube 240 Get Samples,
    X28HC256JZ-12T1
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    memory
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    		PLCC Reel 750
    X28HC256JZ-15
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    memory
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    Samples Available
    		 PLCC Tube 90 Get Samples,
    X28HC256JZ-15T1
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    memory
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    		PLCC Reel 750
    X28HC256JZ-90
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    memory
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    Samples Available
    		 PLCC Tube 30 Get Samples,
    X28HC256JZ-90T1
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    memory
    spa
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    		PLCC Reel 750
    X28HC256PIZ-12
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    memory
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    Samples Available
    		 PDIP Tube 312 Get Samples,
    X28HC256PIZ-15
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    memory
    spa
    view_in_ar
    Samples Available
    		 PDIP Tube 312 Get Samples,
    X28HC256PZ-12
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    memory
    spa
    view_in_ar
    Samples Available
    		 PDIP Tube 208 Get Samples,
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