DM74LS164M - National Semiconductor

TL/F/6398

54LS164/DM54LS164/DM74LS164 8-Bit Serial In/Parallel Out Shift Registers

June 1989

54LS164/DM54LS164/DM74LS164

8-Bit Serial In/Parallel Out Shift Registers

General Description

These 8-bit shift registers feature gated serial inputs and an

asynchronous clear. A low logic level at either input inhibits

entry of the new data, and resets the first flip-flop to the low

level at the next clock pulse, thus providing complete con-

trol over incoming data. A high logic level on either 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 and hold time requirements will be entered. Clock-

ing occurs on the low-to-high level transition of the clock

input. All inputs are diode-clamped to minimize transmis-

sion-line effects.

Features

YGated (enable/disable) serial inputs

YFully buffered clock and serial inputs

YAsynchronous clear

YTypical clock frequency 36 MHz

YTypical power dissipation 80 mW

YAlternate Military/Aerospace device (54LS164) is avail-

able. Contact a National Semiconductor Sales Office/

Distributor for specifications.

Connection Diagram

Dual-In-Line Package

TL/F/6398–1

Order Number 54LS164DMQB, 54LS164FMQB,

54LS164LMQB, DM54LS164J, DM54LS164W,

DM74LS164M or DM74LS164N

See NS Package Number E20A,

J14A, M14A, N14A or W14B

Function Table

Inputs Outputs

Clear Clock A B QAQB... QH

L X X X L L ... L

HLXXQ

A0 QB0 ... QH0

HHHQ

An ... QGn

LX L Q

An ... QGn

XL L Q

An ... QGn

HeHigh Level (steady state), L eLow Level (steady state)

XeDon’t Care (any input, including transitions)

eTransition from low to high level

QA0,Q

B0,Q

H0 eThe level of QA,Q

,orQ

, respectively, before the

indicated steady-state input conditions were established.

QAn,Q

Gn eThe level of QAor QGbefore the most recent

transition of

the clock; indicates a one-bit shift.

Logic Diagram

TL/F/6398–2

C1995 National Semiconductor Corporation RRD-B30M105/Printed in U. S. A.

Absolute Maximum Ratings (Note)

If Military/Aerospace specified devices are required,

please contact the National Semiconductor Sales

Office/Distributors for availability and specifications.

Supply Voltage 7V

Input Voltage 7V

Operating Free Air Temperature Range

DM54LS and 54LS b55§Ctoa

125§C

DM74LS 0§Ctoa

70§C

Storage Temperature Range b65§Ctoa

150§C

Note:

The ‘‘Absolute Maximum Ratings’’ are those values

beyond which the safety of the device cannot be guaran-

teed. The device should not be operated at these limits. The

parametric values defined in the ‘‘Electrical Characteristics’’

table are not guaranteed at the absolute maximum ratings.

The ‘‘Recommended Operating Conditions’’ tables will de-

fine the conditions for actual device operation.

Recommended Operating Conditions

Symbol Parameter DM54LS164 DM74LS164 Units

Min Nom Max Min Nom Max

VCC Supply Voltage 4.5 5 5.5 4.75 5 5.25 V

VIH High Level Input Voltage 2 2 V

VIL Low Level Input Voltage 0.7 0.8 V

IOH High Level Output Current b0.4 b0.4 mA

IOL Low Level Output Current 4 8 mA

fCLK Clock Frequency (Note 4) 0 25 0 25 MHz

tWPulse Width Clock 20 20 ns

(Note 4) Clear 20 20

tSU Data Setup Time (Note 4) 17 17 ns

tHData Hold Time (Note 4) 5 5 ns

tREL Clear Release Time (Note 4) 30 30 ns

TAFree Air Operating Temperature b55 125 0 70 §C

Electrical Characteristics over recommended operating free air temperature range (unless otherwise noted)

Symbol Parameter Conditions Min Typ Max Units

(Note 1)

VIInput Clamp Voltage VCC eMin, IIeb

18 mA b1.5 V

VOH High Level Output VCC eMin, IOH eMax DM54 2.5 3.4 V

Voltage VIL eMax, VIH eMin DM74 2.7 3.4

VOL Low Level Output VCC eMin, IOL eMax DM54 0.25 0.4

Voltage VIL eMax, VIH eMin DM74 0.35 0.5 V

IOL e4 mA, VCC eMin DM74 0.25 0.4

IIInput Current @Max VCC eMax, VIe7V 0.1 mA

Input Voltage

IIH High Level Input Current VCC eMax, VIe2.7V 20 mA

IIL Low Level Input Current VCC eMax, VIe0.4V b0.4 mA

IOS Short Circuit VCC eMax DM54 b20 b100 mA

Output Current (Note 2) DM74 b20 b100

ICC Supply Current VCC eMax (Note 3) 16 27 mA

Note 1: All typicals are at VCC e5V, TAe25§C.

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

Note 3: ICC is measured with all outputs open, the SERIAL input grounded, the CLOCK input at 2.4V, and a momentary ground, then 4.5V, applied to the CLEAR

input.

Note 4: TAe25§C and VCC e5V.

Switching Characteristics at VCC e5V and TAe25§C (See Section 1 for Test Waveforms and Output Load)

From (Input) RLe2kX

Symbol Parameter To (Output) CLe15 pF CLe50 pF Units

Min Max Min Max

fMAX Maximum Clock Frequency 25 MHz

tPLH Propagation Delay Time Clock to 27 30 ns

Low to High Level Output Output

tPHL Propagation Delay Time Clock to 32 40 ns

High to Low Level Output Output

tPHL Propagation Delay Time Clear to 36 45 ns

High to Low Level Output Output

Timing Diagram

TL/F/6398–3

Physical Dimensions inches (millimeters)

Ceramic Leadless Chip Carrier Package (E)

Order Number 54LS164LMQB

NS Package Number E20A

14-Lead Ceramic Dual-In-Line Package (J)

Order Number 54LS164DMQB or DM54LS164J

NS Package Number J14A

Physical Dimensions inches (millimeters) (Continued)

14-Lead Small Outline Molded Package (M)

Order Number DM74LS164M

NS Package Number M14A

14-Lead Molded Dual-In-Line Package (N)

Order Number DM74LS164N

NS Package Number N14A

54LS164/DM54LS164/DM74LS164 8-Bit Serial In/Parallel Out Shift Registers

Physical Dimensions inches (millimeters) (Continued)

14-Lead Ceramic Flat Package (W)

Order Number 54LS164FMQB or DM54LS164W

NS Package Number W14B

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