National Semiconductor 54F379, 74F379 Technical data

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54F/74F379
Quad Parallel Register with Enable

54F/74F379 Quad Parallel Register with Enable

August 1995

General Description

The ’F379 is a 4-bit register with buffered common Enable.
This device is similar to the ’F175 but features the common
Enable rather than common Master Reset.

Commercial Military

74F379PC N16E 16-Lead (0.300×Wide) Molded Dual-In-Line

54F379DM (QB) J16A 16-Lead Ceramic Dual-In-Line

74F379SC (Note 1) M16A 16-Lead (0.300×Wide) Molded Small Outline, JEDEC

74F379SJ (Note 1) M16D 16-Lead (0.300×Wide) Molded Small Outline, EIAJ

54F379FM (QB) W16A 16-Lead Cerpack

54F379LM (QB) E20A 20-Lead Ceramic Leadless Chip Carrier, Type C

Note 1: Devices also available in 13×reel. Use suffixeSCX and SJX.

Package

Number

Logic Symbols

IEEE/IEC

Pin Assignment

DIP, SOIC and Flatpak

Features

Y

Edge triggered D-type inputs

Y

Buffered positive edge-triggered clock

Y

Buffered common enable input

Y

True and complement outputs

Y

Guaranteed 4000V minimum ESD protection

Package Description

Connection Diagrams

Pin Assignment

for LCC

TL/F/9527– 1

TL/F/9527– 5

TL/F/9527– 3

TRI-STATEÉis a registered trademark of National Semiconductor Corporation.

C

1995 National Semiconductor Corporation RRD-B30M115/Printed in U. S. A.

TL/F/9527

TL/F/9527– 2

Unit Loading/Fan Out

54F/74F

Pin Names Description

E Enable Input (Active LOW) 1.0/1.0 20 mA/b0.6 mA
D

0–D3

CP Clock Pulse Input (Active Rising Edge) 1.0/1.0 20 mA/

Data Inputs 1.0/1.0 20 mA/b0.6 mA

Q0–Q3Flip-Flop Outputs 50/33.3b1 mA/20 mA
Q

0–Q3

Complement Outputs 50/33.3b1 mA/20 mA

U.L. Input I

HIGH/LOW Output IOH/I

IH/IIL

b

0.6 mA

OL

Functional Description

The ’F379 consists of four edge-triggered D-Type flip-flops
with individual D inputs and Q and Q
(CP) and Enable (E
When the E

) inputs are common to all flip-flops.

is input HIGH, the register will retain the present
data independent of the CP input. The D
change when the clock is in either state, provided that the
recommended setup and hold times are observed.

outputs. The Clock

and E inputs can

n

Truth Table

Inputs Outputs

E CP D

H L XNCNC

LLHH L
LLLLH

e

H

HIGH Voltage Level

e

LOW Voltage Level

L

e

Immaterial

X

e

LOW-to-HIGH Transition

L

e

No Change

NC

n

Logic Diagram

Please note that this diagram is provided only for the understanding of logic operations and should not be used to estimate propagation delays.

Q

n

Q

TL/F/9527– 4

n

2

Absolute Maximum Ratings (Note 1)

If Military/Aerospace specified devices are required,
please contact the National Semiconductor Sales
Office/Distributors for availability and specifications.

Storage Temperature

Ambient Temperature under Bias

Junction Temperature under Bias

Plastic

Pin Potential to

V

CC

Ground Pin

Input Voltage (Note 2)

Input Current (Note 2)

Voltage Applied to Output

in HIGH State (with V
Standard Output

CC

e

TRI-STATEÉOutput

0V)

b

65§Ctoa150§C

b

55§Ctoa125§C

b

55§Ctoa175§C

b

55§Ctoa150§C

b

0.5V toa7.0V

b

0.5V toa7.0V

b

30 mA toa5.0 mA

b

0.5V to V

b

0.5V toa5.5V

Current Applied to Output

in LOW State (Max) twice the rated I

(mA)

OL

ESD Last Passing Voltge (Min) 4000V

Note 1: Absolute maximum ratings are values beyond which the device may
be damaged or have its useful life impaired. Functional operation under
these conditions is not implied.

Note 2: Either voltage limit or current limit is sufficient to protect inputs.

DC Electrical Characteristics

Symbol Parameter

V

V

V

V

V

I

IH

I

BVI

I

CEX

V

I

OD

I

IL

I

OS

I

CCL

IH

IL

CD

OH

OL

ID

Input HIGH Voltage 2.0 V Recognized as a HIGH Signal

Input LOW Voltage 0.8 V Recognized as a LOW Signal

Input Clamp Diode Voltage

Output HIGH 54F 10% V
Voltage 74F 10% V

Output LOW 54F 10% V
Voltage 74F 10% V

Input HIGH 54F 20.0
Current 74F 5.0

Input HIGH Current 54F 100
Breakdown Test 74F 7.0

Output HIGH 54F 250
Leakage Current 74F 50

Input Leakage
Test All Other Pins Grounded

Output Leakage
Circuit Current All Other Pins Grounded

Input LOW Current

Output Short-Circuit Current

Power Supply Current 28 40 mA Max V

74F 5% V

74F 4.75 V 0.0

74F 3.75 mA 0.0

Min Typ Max

2.5 I

CC

2.5 V Min I

CC

2.7 I

CC

CC

CC

b

CC

60

Recommended Operating
Conditions

Free Air Ambient Temperature

Military
Commercial 0

Supply Voltage

Military
Commercial

54F/74F

b

Units V

b

1.2 V Min I

0.5

0.5 I

CC

V Min

mA Max

mA Max

mA Max

b

0.6 mA Max V

150 mA Max V

I

V

V

V

I

V

IN

OH

OH

OH

OL

OL

ID

eb

IN

IN

OUT

e

IOD

IN

OUT

O

eb

eb

eb

e

e

e

e

e

1.9 mA

e

e

e

e

20 mA
20 mA

2.7V

7.0V

0.5V

LOW

Conditions

18 mA

V

150 mV

0V

b

55§Ctoa125§C

Ctoa70§C

§

a

4.5V toa5.5V

a

4.5V toa5.5V

1mA
1mA
1mA

CC

3