74HC594DB datasheet(2/10 Pages) PHILIPS

2 / 10 page

December 1991

Philips Semiconductors

Product speciﬁcation

8-bit shift register with output register

74HC/HCT594

FEATURES

• Synchronous serial input and output

• 8-bit parallel output

• Shift and storage register have independent direct clear

and clocks

• 100 MHz (typ.)

• Output capability:

– parallel outputs: bus driver

– serial outputs: standard

• ICC category: MSI

APPLICATIONS

• Serial-to parallel data conversion

• Remote control holding register

DESCRIPTION

The 74HC/HCT594 are high-speed, Si-gate CMOS

devices, and are pin compatible with low power Schottky

TTL (LSTTL). They are specified in compliance with

JEDEC standard No. 7A.

The 74HC/HCT594 contain an 8-bit, non-inverting,

serial-in, parallel-out shift register that feeds an 8-bit

D-type storage register. Separate clocks and direct

overriding clears are provided on both the shift and storage

registers. A serial output (Q7’) is provided for cascading

purposes.

Both the shift and storage register clocks are positive-edge

triggered. If the user wishes to connect both clocks

together, the shift register will always be one count pulse

ahead of the storage register.

QUICK REFERENCE DATA

GND = 0 V: Tamb = 250 C; tr = tf = 6 ns.

Notes

1. CPD is used to determine the dynamic power dissipation (PD in µW).

PD = CPD × VCC2 × fi + ∑ (CL × VCC2 × fo), where:

fi = input frequency in MHz; fo = output frequency in MHz;

∑ (CL × VCC2 × fo) = sum of the outputs;

CL = output load capacitance in pF; VCC = supply voltage in V.

2. For HC, the condition is VI = GND to VCC; for HCT, the condition is VI = GND to VCC − 1.5 V.

ORDERING INFORMATION

SYMBOL

PARAMETER

CONDITIONS

TYPICAL

UNIT

HCT

tPHL/tPLH

propagation delay

CL = 15 pF; VCC = 5 V

SHCP to Q7’

1315ns

STCP to Qn

SHR to Qn

STR to Qn

fmax

maximum clock frequency SHCP,STCP

100

MHz

input capacitance

3.5

CPD

power dissipation capacitance per package

notes 1 and 2

EXTENDED TYPE NUMBER

PACKAGES

PINS

PIN POSITION

MATERIAL

CODE

PC74HC/HCT594P

DIL

plastic

SOT38C, P

PC74HC/HCT594T

plastic

SOT109A

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