The TC74VHC9595 is an advanced high speed 8-BIT SHIFT

REGISTER/LATCH fabricated with silicon gate C2MOS

technology.

TC74VHC9595 combines low power consumption of CMOS with

Schottky TTL speeds.

Shift operation is accomplished on the positive going transition of

the SCK input. The output register is loaded with the contents of

the shift register on the positive going transition of the RCK input.

Since RCK and SCK signal are independent, parallel outputs can

be held stable during the shift operation.

This register can be used in serial-to-parallel conversion, data

receivers, etc.

All the inputs have hysteresis between the positive-going and

negative-going thresholds. Thus the TC74VHC9595 is capable of

squaring up transitions of slowly changing input signals and

provides an improved noise immunity.

Additionally, all the inputs have a newly developed protection

circuit without a diode returned to VCC. This enables the inputs

to be tolerant of up to 5.5 volts even when power supply is down.

The input power-down protection capability makes the

TC74VHC9595 ideal for a wide range of applications, such as

interfacing between different voltages, voltage translation from 5

V to 3 V and battery back-up circuits.

A variant of the TC 74HC/VHC/AHC/LV595, the TC74VHC9595

contains negative-edge-triggered flip-flops to improve timing

margins that are affected by long wires or slowly changing clocks

when multiple parts are cascaded together.

Features

 High speed: fmax = 224MHz (typ.) at VCC = 5 V

 Low power dissipation: ICC = 4 µA (max) at Ta = 25°C

 Power down protection is provided on all inputs.

 Balanced propagation delays: tpLH ∼− tpHL

 Wide operating voltage range: VCC (opr) = 2 V to 5.5 V