National Semiconductor 5474, DM5474, DM7474 Technical data

查询5474供应商

5474/DM5474/DM7474
Dual Positive-Edge-Triggered D Flip-Flops
with Preset, Clear and Complementary Outputs

General Description

This device contains two independent positive-edge-trig­gered D flip-flops with complementary outputs. The informa­tion on the D input is accepted by the flip-flops on the posi­tive going edge of the clock pulse. The triggering occurs at a
voltage level and is not directly related to the transition time
of the rising edge of the clock. The data on the D input may
be changed while the clock is low or high without affecting
the outputs as long as the data setup and hold times are not

Connection Diagram

violated. A low logic level on the preset or clear inputs will
set or reset the outputs regardless of the logic levels of the
other inputs.

Features

Y

Alternate Military/Aerospace device (5474) is available.
Contact a National Semiconductor Sales Office/Distrib­utor for specifications.

Dual-In-Line Package

June 1989

5474/DM5474/DM7474 Dual Positive-Edge-Triggered D Flip-Flops

with Preset, Clear and Complementary Outputs

Order Number 5474DMQB, 5474FMQB, DM5474J, DM5474W, DM7474M or DM7474N

See NS Package Number J14A, M14A, N14A or W14B

TL/F/6526– 1

Function Table

Inputs Outputs

PR CLR CLK D Q Q

LH XXHL
HL XXLH
LL XXH*H*
HH
HH
HH LXQ

e

H

High Logic Level

e

Either Low or High Logic Level

X

e

Low Logic Level

L

e

Positive-going transition of the clock.

u

e

This configuration is nonstable; that is, it will not persist when either the preset and/or clear

*

inputs return to their inactive (high) level.

e

The output logic level of Q before the indicated input conditions were established.

Q

0

C

1995 National Semiconductor Corporation RRD-B30M105/Printed in U. S. A.

TL/F/6526

u
u

HH L
LL H

0

Q

0

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 5.5V

Operating Free Air Temperature Range

DM54 and 54
DM74 0

Storage Temperature Range

b

55§Ctoa125§C

Ctoa70§C

§

b

65§Ctoa150§C

Note:

beyond which the safety of the device cannot be guaran­teed. 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’’ table will define
the conditions for actual device operation.

Recommended Operating Conditions

Symbol Parameter

V

V

V

I

I

f

t

CC

IH

IL

OH

OL

CLK

W

Supply Voltage 4.5 5 5.5 4.75 5 5.25 V

High Level Input Voltage 2 2 V

Low Level Input Voltage 0.8 0.8 V

High Level Output Current

Low Level Output Current 16 16 mA

Clock Frequency (Note 2) 0 15 0 15 MHz

Pulse Width Clock High 30 30
(Note 2)

Clock Low 37 37

Clear Low 30 30

Preset Low 30 30

t

SU

t

H

T

A

Note 1: The symbol (u) indicates the rising edge of the clock pulse is used for reference.

Note 2: T

Input Setup Time (Notes1&2) 20

Input Hold Time (Notes1&2) 5

Free Air Operating Temperature

e

A

25§C and V

e

5V.

CC

DM5474 DM7474

Min Nom Max Min Nom Max

u

u

b

55 125 0 70

The ‘‘Absolute Maximum Ratings’’ are those values

Units

b

0.4

b

0.4 mA

ns

20

u

5

u

ns

ns

C

§

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

Symbol Parameter Conditions Min

e

V

I

V

OH

V

OL

I

I

I

IH

Input Clamp Voltage V

High Level Output V
Voltage V

Low Level Output V
Voltage V

Input Current@Max V
Input Voltage

High Level Input V
Current V

CC

CC
IL

CC
IH

CC

CC
I

e

e

e

eb

Min, I

e

Min, I

Max, V

e

Min, I

Min, V

e

Max, V

e

Max D 40

2.4V

12 mA

I

e

Max

OH

e

Min

IH

e

Max

OL

e

Max

IL

e

5.5V

I

Clock 80

Clear 120

Preset 40

I

IL

Low Level Input V
Current V

e

CC

e

0.4V

I

(Note 6)

Max D

Clock

Clear

Preset

I

OS

I

CC

Note 3: All typicals are at V

Note 4: Not more than one output should be shorted at a time.

Note 5: With all outputs open, I

Note 6: Clear is tested with preset high and preset is tested with clear high.

Short Circuit V
Output Current (Note 4)

Supply Current V

e

e

5V, T

CC

CC

25§C.

A

is measured with the Q and Q outputs high in turn. At the time of measurement the clock is grounded.

e

Max DM54

CC

DM74

e

Max (Note 5) 17 30 mA

CC

2

2.4 3.4 V

b

20

b

18

Typ

(Note 3)

Max Units

b

1.5 V

0.2 0.4 V

1mA

b

1.6

b

3.2

b

3.2

b

1.6

b

55

b

55

mA

mA

mA

Switching Characteristics at V

Symbol Parameter

f

MAX

t

PHL

t

PLH

t

PHL

t

PLH

t

PHL

t

PLH

Maximum Clock
Frequency

Propagation Delay Time Preset
High to Low Level Output to Q

Propagation Delay Time Preset
Low to High Level Output to Q

Propagation Delay Time Clear
High to Low Level Output to Q

Propagation Delay Time Clear
Low to High Level Output to Q

Propagation Delay Time Clock to
High to Low Level Output Q or Q

Propagation Delay Time Clock to
Low to High Level Output Q or Q

CC

e

5V and T

e

25§C (See Section 1 for Test Waveforms and Output Load)

A

e

R

400X

From (Input)

To (Output)

L

e

15 pF Units

C

L

Min Max

15 MHz

40 ns

25 ns

40 ns

25 ns

40 ns

25 ns

3

Physical Dimensions inches (millimeters)

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

Order Number 5474DMQB or DM5474J

NS Package Number J14A

4

Physical Dimensions inches (millimeters) (Continued)

14-Lead Small Outline Molded Package (M)

Order Number DM7474M

NS Package Number M14A

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

Order Number DM7474N

NS Package Number N14A

5

Physical Dimensions inches (millimeters) (Continued)

14-Lead Ceramic Flat Package (W)

Order Number 5474FMQB or DM5474W

NS Package Number W14B

with Preset, Clear and Complementary Outputs

5474/DM5474/DM7474 Dual Positive-Edge-Triggered D Flip-Flops

LIFE SUPPORT POLICY

NATIONAL’S PRODUCTS ARE NOT AUTHORIZED FOR USE AS CRITICAL COMPONENTS IN LIFE SUPPORT
DEVICES OR SYSTEMS WITHOUT THE EXPRESS WRITTEN APPROVAL OF THE PRESIDENT OF NATIONAL
SEMICONDUCTOR CORPORATION. As used herein:

1. Life support devices or systems are devices or 2. A critical component is any component of a life
systems which, (a) are intended for surgical implant support device or system whose failure to perform can
into the body, or (b) support or sustain life, and whose be reasonably expected to cause the failure of the life
failure to perform, when properly used in accordance support device or system, or to affect its safety or
with instructions for use provided in the labeling, can effectiveness.
be reasonably expected to result in a significant injury
to the user.

National Semiconductor National Semiconductor National Semiconductor National Semiconductor
Corporation Europe Hong Kong Ltd. Japan Ltd.

1111 West Bardin Road Fax: (
Arlington, TX 76017 Email: [e-mail] Ocean Centre, 5 Canton Rd. Fax: [phone]
Tel: [phone] Deutsch Tel: (
Fax: [phone] English Tel: (

National does not assume any responsibility for use of any circuitry described, no circuit patent licenses are implied and National reserves the right at any time without notice to change said circuitry and specifications.

Fran3ais Tel: (
Italiano Tel: (

a

49) 0-180-530 85 86 13th Floor, Straight Block, Tel: [phone]

a

49) 0-180-530 85 85 Tsimshatsui, Kowloon

a

49) 0-180-532 78 32 Hong Kong

a

49) 0-180-532 93 58 Tel: [phone]

a

49) 0-180-534 16 80 Fax: [phone]