INTEGRAL IN74LS164N, IN74LS164D Datasheet

8-Bit Serial-Input/Parallel-Output
Shift Register

This 8-bit shift register features gated serial inputs and an
asynchronous reset. The gated serial inputs (A and B) permit complete
control over incoming data as a low at either (or both) input(s) inhibits
entry of the new data and resets the first flip flop to the low level at the
next clock pulse. A high level input enables the other input which will
then determine the state of the first flip-flop. Data at the serial inputs
may be changed while the clock is high or low, but only information
meeting the setup requirements will be entered clocking occurs or the
low-to-high level transition of the clock input. All inputs are diode­clamped to minimize transmission-line effects.

•

Gated (Enable/Disable) Serial Inputs

•

Fully Buffered Clock and Serial Inputs

•

Asynchronous Clear

TECHNICAL DATA

IN74LS164

ORDERING INFORMATION

IN74LS164N Plastic

IN74LS164D SOIC

TA =0° to 70°C

for all packages

LOGIC DIAGRAM

PIN 14 =V

PIN 7 = GND

CC

PIN ASSIGNMENT

FUNCTION TABLE

Inputs Outputs

Reset Clock A1 A2 QA QB ... Q

L X X X L L ... L
H X X no change
H H D D QAn ... Q
H D H D QAn ... Q
H L L L QAn ... Q

D = data input
X = don’t care
Q

- Q

An

rising edge at the clock input.

= data shifted from the previous stage on a

Gn

H

Gn

Gn

Gn

1

IN74LS164

MAXIMUM RATINGS

*

Symbol Parameter Value Unit

V

CC

V

V

OUT

Supply Voltage 7.0 V
Input Voltage 7.0 V

IN

Output Voltage 5.5 V

Tstg Storage Temperature Range -65 to +150

*

Maximum Ratings are those values beyond which damage to the device may occur.

Functional operation should be restricted to the Recommended Operating Conditions.

RECOMMENDED OPERATING CONDITIONS

Symbol Parameter Min Max Unit

V

V
V
I

f

CC

IH

IL

OH

I

OL

T

A

clock

t

su

t

h

t

w

t

w

t

rec

Supply Voltage 4.75 5.25 V
High Level Input Voltage 2.0 V
Low Level Input Voltage 0.8 V
High Level Output Current -0.4 mA
Low Level Output Current 8.0 mA
Ambient Temperature Range 0 +70
Clock Frequency 0 25 MHz
Setup Time, A1 or A2 to Clock 15 ns
Hold Time, Clock to A1 or A2 5 ns
Pulse Width, Clock 20 ns
Pulse Width, Reset 20 ns
Recovery Time 5 ns

°

C

°

C

DC ELECTRICAL CHARACTERISTICS

over full operating conditions

Guaranteed Limit

Symbol Parameter Test Conditions Min Max Unit

V

V

OH

V

OL

Input Clamp Voltage VCC = min, IIN = -18 mA -1.5 V

IK

High Level Output Voltage VCC = min, IOH = -0.4 mA 2.7 V
Low Level Output Voltage VCC = min, IOL = 4 mA 0.4 V

VCC = min, IOL = 8 mA 0.5

I

IH

High Level Input Current VCC = max, VIN = 2.7 V 20 mA

VCC = max, VIN = 7.0 V 0.1 mA

I

IL

I

O

Low Level Input Current VCC = max, VIN = 0.4 V -0.4 mA
Output Short Circuit Current VCC = max, VO = 0 V

-20 -100 mA

(Noote 1)

I

CC

Supply Current VCC = max (Note 2) 27 mA

Note 1: Not more than one output should be shorted at a time, and duration should not exceed one second.
Note 2: I

is measured with outputs open, serial inputs grouned, the clock input at 2.4 V, and a momentary

CC

ground, then 4.5 V applied.

2