1 Features

• LSTTL input logic compatible

– VIL(max) = 0.8 V, VIH(min) = 2 V

• CMOS input logic compatible

– II ≤ 1 μA at VOL, VOH

• 4.5 V to 5.5 V operation

• Supports fanout up to 10 LSTTL loads

• Direct overriding load (data) inputs

• Gated clock inputs

• Extended ambient temperature range: –40°C to

+125°C, TA

2 Applications

• Increase the number of inputs on a microcontroller

3 Description

The SN74HCT165 is a parallel- or serial-in, serial-out

8-bit shift register. Parallel-in access to each stage is

provided by eight individual direct data (A-H) inputs

that are enabled by a low level at the shift/load

(SH/LD) input. The SN74HCT165 also features a

clock-inhibit (CLK INH) function and a complementary

serial (Q H) output.