74HC595N

The 74HC595N from Philips is a high-speed Si-gate CMOS device functioning as an 8-bit serial-in/serial or parallel-out shift register with output latches and 3-state outputs. It is pin-compatible with low power Schottky TTL (LSTTL) and specified in compliance with JEDEC standard no. 7A.

Key electrical characteristics include a typical shift out frequency of 100 MHz for the HC variant and 57 MHz for the HCT variant. Propagation delays are also specified, with typical values such as 16 ns from SHCP to Q7' and 17 ns from STCP to Qn, under specific load conditions. Input capacitance is typically 3.5 pF, and power dissipation capacitance is around 115 pF for HC and 130 pF for HCT.

This shift register features separate clocks for the shift register and storage register, allowing for flexible data handling. Data is shifted on positive-going clock transitions. It includes an asynchronous reset (active LOW) for all shift register stages. The storage register provides 8 parallel 3-state bus driver outputs, which are active when the output enable (OE) is LOW.

The 74HC595N is supplied in a 16-lead DIP (Dual In-line Package) with a 300 mil lead spacing, designed for through-hole mounting. Its applications include serial-to-parallel data conversion and remote control holding registers.