SN54ALS526, SN54ALS527, SN54ALS528
SN74ALS526, SN74ALS527, SN74ALS528
FUSE-PROGRAMMABLE IDENTITY COMPARATORS

SDAS051A - JUNE 1994 - REVISED MAY 1986

features

• Can Be Programmed and Verified on Most Incoming Test Equipment
• Reduces Board and Package Size for Similar Fixed Comparator Functions
• High-Speed Address Recognition
• Package Options Include Plastic Small Outline Packages, Ceramic Chip Carriers, and Standard Plastic and Ceramic 300-mil DIPs
• Dependable Texas Instruments Quality and Reliability
• Programming Capabilities
  • ALS526 - Fuse Programmable 16-Bit
  • Identity Comparator
  • ALS527 - Fuse Programmable 8-Bit
  • Identity Comparator and 4-Bit Comparator
  • ALS528 - Fuse Programmable 12-Bit Identity Comparator

   

description

The 'ALS526 and 'ALS528 are fuse-programmable identity comparators designed for easy programming in fixed-comparator applications. The 'ALS526 compares a 16-bit data word against a preprogrammed 16-bit data word while the 'ALS528 compares a 12-bit data word against a preprogrammed 12-bit data word. The 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 'ALS527 is a combination of an 8-bit fuse-programmable comparator and a conventional 4-bit comparator. For the 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.