SN54ALS569AJ

The SN54ALS569AJ is a synchronous 4-bit up/down binary counter manufactured by Texas Instruments. This component belongs to the ALS technology family and offers 3-state outputs that directly drive bus lines. The counter operation is independent of the 3-state output state. It supports fully synchronous clear, count, and load functions, along with an asynchronous clear option. The device is fully cascadable, allowing for expansion.

Designed for demanding applications, the SN54ALS569AJ operates across a wide temperature range of -55°C to 125°C, making it suitable for military environments. Its bipolar input type and 3-state output type are characteristic of its logic family. The counter is programmable and can count up or down based on the U/D\ input. High-speed operation is supported with propagation delays typically between 10ns and 50ns.

Available in various package options including CDIP (J), LCCC (FK), Plastic Small-Outline (DW), Standard Plastic (N), Ceramic (J), and 300-mil DIPs, this counter is designed for through-hole mounting. The 3-state Q outputs are enabled when the output-enable input is low, forcing them into a high-impedance state when high. The clear function can be initiated asynchronously or synchronously, with asynchronous clear overriding all other functions.