DP8406 - National Semiconductor

DP8406 32-Bit Parallel Error Detection and Correction Circuit

The DP8406 device is a 32-bit parallel error detection and correction circuit (EDAC) in a 52-pin or 68-pin package The EDAC uses a modified Hamming code to generate a 7-bit check word from a 32-bit data word This check word is stored along with the data word during the memory write cycle During the memory read cycle the 39-bit words from memory are processed.

Features

Y Y Y Y Y Y Y Detects and corrects single-bit errors Detects and flags dual-bit errors Built-in diagnostic capability Fast write and read cycle processing times Byte-write capability Guaranteed 4000V minimum ESD protection Fully pin and function compatible with SN74ALS632A thru SN74ALS635 series TI’s Simplified Functional Block TL F 9579
  – 9 Device DP8406 DP8406 Package 52-Pin 68-Pin Byte-Write yes yes Output TRI-STATE TRI-STATE FAST and TRI-STATE are registered trademarks of National Semiconductor Corporation C1995 National Semiconductor Corporation TL F 9579 RRD-B30M105 Printed in U.