SN54ALS528

The SN54ALS526, SN54ALS527, and SN54ALS528 are fuse-programmable identity comparators designed for easy programming in fixed-comparator applications. The SN54ALS526 compares a 16-bit data word against a preprogrammed 16-bit data word while the SN54ALS528 compares a 12-bit data word against a preprogrammed 12-bit data word. The P = Q output will go low when the applied data word (P inputs) matches the preprogrammed data word (Q represents the preprogrammed data word). Programming is easily accomplished on the bench or with conventional automatic test equipment. Special equipment such as PROM programmers are not required.

The SN54ALS527 is a combination of an 8-bit fuse-programmable comparator and a conventional 4-bit comparator. For the P = Q output to go low, the applied data word P0 through P7 must match the preprogrammed data word Q0 through Q7, and the applied data word P8 through P11 must match the applied data word Q8 through Q11.

The SN54ALS526, SN54ALS527, and SN54ALS528 are characterized for operation over the full military temperature range of 55°C to 125°C. The SN74ALS526, SN74ALS527, and SN74ALS528 are characterized for operation from 0°C to 70°C.