DP8404 Datasheet, National Semiconductor

Y Detects and corrects single-bit errors Y Detects and flags double-bit errors Y Built-in diagnostic capability Y Fast write and read cycle processing times Y Byte-write .

The DP8402A DP8403 DP8404 and DP8405 devices are 32-bit parallel error detection and correction circuits (EDACs) in 52-pin DP8402A and DP8403 or 48-pin DP8404 and DP8405 600-mil packages The EDACs use a modified Hamming code to generate a 7-bit check.