Philips Semiconductors

Product specification

74F595

8-bit shift register with output latches (3-State)

1990 Apr 18

3

LOGIC SYMBOL

12

13

OE

STCP

15

1

2

3

Q0

Q1

Q2

Q3

10

11

SHCP

SHR

SF01097

VCC = Pin 16

GND = Pin 8

14

Ds

9

Qs

45

6

Q4

Q5

Q6

7

Q7

IEC/IEEE SYMBOL (IEEE/IEC)

SF01098

14

1D

EN3

C1/

!

13

12

10

11

2

3

4

C2

3

15

1

R

SRG8

2D

6

7

9

5

3

2D

MODE SELECT – FUNCTION TABLE

INPUTS

INTERNAL SHIFT

REGISTERS

INTERNAL STORAGE

REGISTER

OUTPUTS

OPERATING

MODES

OE

SHR

SHCP

STCP

Dn

O0

O1–O7

Q0–Q7

Q0–Q7

QS

MODES

H

H

↑

↑

X

O0

O1–O7

Q0–Q7

Z

Q7

No Change

H

L

X

↑

X

L0

L

Q0–Q7

Z

L

Clear shift

L

L

X

↑

X

L0

L

Q0–Q7

Q0–Q7

L

register, hold latch

H

H

↑

↑

ds

Ds

o0–o6

Q0–Q7

Z

o6

Shift

L

H

↑

↑

ds

Ds

o0–o6

Q0–Q7

Q0–Q7

o6

Shift

H

H

↑

↑

X

O0

O1–O7

o0–o7

Z

Q7

Store

L

H

↑

↑

X

O0

O1–O7

o0–o7

o0–o7

Q7

Store

H

H

↑

↑

ds

Ds

o0–o6

o0–o7*

Z

o6

Store then Shift

L

H

↑

↑

ds

Ds

o0–o6

o0–o7*

o0–o*

o6

Store, then Shift

H = High voltage level

L

= Low voltage level

X = Don’t care

Z = High impedance

dn (on)=Lower case letters indicate the state of the referenced input (or output) one setup time prior to the Low-to-High clock transition

↑ = Low-to-High clock transition

↑ = Not a Low-to-High clock transition

*

= When clocking both SHCP and STCP simultaneously the Shift Register state will always be one clock pulse ahead of the Storage

Register