74AHC594

Document number: DS35484 Rev. 3 - 2

3 of 10

www.diodes.com

June 2013

© Diodes Incorporated

74HC594

Functional Description and Timing Diagram

Control

Input

Output

Function

SHR

STR

SHCP

STCP

DS

Q7S

Qn

L

X

X

X

X

L

NC

Clear Shift Register

X

L

X

X

X

NC

L

Clear Storage Register

H

X



L

H or L

Q6S

NC

H

H

X



X

NC

Qs

H

H





H or L

Q6S

QnS

Shift Register one pulse count ahead of storage register.

H=HIGH voltage state

L=LOW voltage state

=LOW to HIGH transition

X= don’t care – high or low (not floating)

NC= No change

SHCP

DS

STCP

SHR

STR

Q0

Q1

Q6

Q7

Q7S

Symbol

Description

Rating

Unit

ESD HBM

Human Body Model ESD Protection

2

KV

ESD CDM

Charged Device Model ESD Protection

1

KV

ESD MM

Machine Model ESD Protection

200

V

Supply Voltage Range

-0.5 to +7.0

V

Input Voltage Range

-0.5 to +7.0

V

Voltage applied to output in high or low state

V

Input Clamp Current

-20

mA

Input Clamp Current

VI > Vcc +0.5V

20

mA

-20

mA

20

mA

Continuous output current

Q7 standard output

±25

mA

Qn bus driver outputs

±35

mA

Continuous current through Vcc

70

mA

Continuous current through GND

-70

mA

Operating Junction Temperature

-40 to +150

°C

Storage Temperature

-65 to +150

°C

Total Power Dissipation

500

mW

Note:

4. Stresses beyond the absolute maximum may result in immediate failure or reduced reliability. These are stress values and device operation should be

within recommend values.