SN54LS630

The SN54LS630 is a type of 16 bit parallel error detection and correction circuit. A modified hamming code is used by it to generate a 6-bit check word from a 16 bit data word. This check word is stored along with the data word during the memory write circle.

Features of SN54LS630  are: (1)detects and corrections single-bit errors; (2)detects and flags dual-bit errors; (3)fast processing times: write cycle: generates check word in 45ns typical, read cycle: flags errors in 27ns typical; (4)power dissipation 600mW typical; (5) choice of output configuration: 3-state.

The absolute maximum ratings and electrical characteristics of the SN54LS630 can be summarized as: (1)supply volt age: 7V; (2)input voltage: 7V;(3)operating free air temperature range:-55 to 125;(4)storage temperature rang:-65 to 150; (5)off-state output voltage: 5.5V. Electrical characteristics: (1)high-level input voltage: 2V min; (2)low-level input voltage: 0.7V max; (3)input clamp voltage(VCC=min, I1=-18mA): -1.5V max; (4)low level input current(VC C=max, V1=0.4V):-0.2mA max; (5)short-circuit output current(VCC=max):-20mA min and-100mA max, etc.