4-80

FAST AND LS TTL DATA

MC54/74F164

MR

D

Q

CD

D

Q

CD

D

Q

CD

D

Q

CD

D

Q

CD

D

Q

CD

D

Q

CD

A

B

CP

Q0

Q1

Q2

Q3

Q4

Q5

Q6

Q7

D

Q

CD

LOGIC DIAGRAM

FUNCTIONAL DESCRIPTION

The F164 is an edge-triggered 8-bit shift register with se-

rial data entry and an output from each of the eight stages.

Data is entered serially through one of two inputs (A or B); ei-

ther of these inputs can be used as an active HIGH Enable

for data entry through the other input. An unused input must

be tied HIGH.

Each LOW-to-HIGH transition on the Clock (CP) input

shifts data one place to the right and enters into Q0 the logical

AND of the two data inputs (A

• B) that existed before the rising

clock edge. A LOW level on the Master Reset (MR) input over-

rides all other inputs and clears the register asynchronously,

forcing all Q outputs LOW.

GUARANTEED OPERATING RANGES

Symbol

Parameter

Min

Typ

Max

Unit

VCC

Supply Voltage

54, 74

4.5

5.0

5.5

V

TA

Operating Ambient Temperature Range

54

–55

25

125

°C

74

0

25

70

IOH

Output Current

 High

54, 74

–1.0

mA

IOL

Output Current

 Low

54, 74

20

mA

DC CHARACTERISTICS OVER OPERATING TEMPERATURE RANGE (unless otherwise specified)

Limits

Symbol

Parameter

Min

Typ

Max

Unit

Test Conditions

VIH

Input HIGH Voltage

2.0

V

Guaranteed Input HIGH Voltage

VIL

Input LOW Voltage

0.8

V

Guaranteed Input LOW Voltage

VIK

Input Clamp Diode Voltage

–1.2

V

VCC = MIN, IIN = –18 mA

VOH

Output HIGH Voltage

54, 74

2.5

V

IOH = –1.0 mA

VCC = MIN

74

2.7

V

IOH = –1.0 mA

VCC = 4.75 V

VOL

Output LOW Voltage

0.5

V

IOL = 20 mA

VCC = MIN

IIH

Input HIGH Current

20

µA

VCC = MAX, VIN = 2.7 V

0.1

mA

VCC = MAX, VIN = 7.0 V

IIL

Input LOW Current

–0.6

mA

VCC = MAX, VIN = 0.5 V

IOS

Output Short Circuit Current (Note 2)

–60

–150

mA

VCC = MAX, VOUT = 0 V

ICC

Power Supply Current

35

55

mA

A, B = GND, VCC = MAX

CP = HIGH, MR = GND

NOTES:

1. For conditions shown as MIN or MAX, use the appropriate value specified under recommended operating conditions for the applicable device type.

2. Not more than one output should be shorted at a time, nor for more than 1 second.