DESCRIPTION

· These devices are 8-bit identity comparators designed to compare two 8-bit binary or BCD words.

· The SN74ALS518 provides P = Q outputs with open-collector configuration.

· The SN74ALS520 and SN74ALS521 provide P = Q outputs with totem-pole configuration.

· The SN74ALS518 and SN74ALS520 feature 20-kΩ pullup resistors on the Q inputs.

· The SN54ALS520 is specified for operation over the military temperature range of -55°C to 125°C.

· The SN74ALS518, SN74ALS520, and SN74ALS521 are specified for operation from 0°C to 70°C.

FEATURES

· Capable of comparing two 8-bit words.

· Offers choice between totem-pole or open-collector outputs.

· Includes 20-kΩ pullup resistors on Q inputs for the SN74ALS518 and SN74ALS520.

· Available in various package options including Plastic Small-Outline (DW), Ceramic Chip Carriers (FK), and Standard Plastic (N) and Ceramic (J) 300-mil DIPs.

APPLICATIONS

· Suitable for systems requiring binary or BCD word comparison.

· Ideal for applications needing flexible output configurations (totem-pole or open-collector).

· Useful in environments where input pullup resistors are necessary for analog or switch data handling.

· Applicable in both commercial (0°C to 70°C) and military (-55°C to 125°C) temperature ranges.