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DM7474 の電気的特性と機能

DM7474のメーカーはNational Semiconductorです、この部品の機能は「Dual Positive-Edge-Triggered D Flip-Flops」です。


製品の詳細 ( Datasheet PDF )

部品番号 DM7474
部品説明 Dual Positive-Edge-Triggered D Flip-Flops
メーカ National Semiconductor
ロゴ National Semiconductor ロゴ 




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DM7474 Datasheet, DM7474 PDF,ピン配置, 機能
June 1989
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-trig-
gered D flip-flops with complementary outputs The informa-
tion on the D input is accepted by the flip-flops on the posi-
tive 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
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 Distrib-
utor for specifications
Connection Diagram
Dual-In-Line Package
TL F 6526 – 1
Order Number 5474DMQB 5474FMQB DM5474J DM5474W DM7474M or DM7474N
See NS Package Number J14A M14A N14A or W14B
Function Table
Inputs
Outputs
PR CLR CLK D
Q
Q
LH
X XH L
HL
X XL H
LL
X
XH
H
H H u HH L
H H u LL H
HH
L X Q0 Q0
H e High Logic Level
X e Either Low or High Logic Level
L e Low Logic Level
u e Positive-going transition of the clock
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
Q0 e The output logic level of Q before the indicated input conditions were established
C1995 National Semiconductor Corporation TL F 6526
RRD-B30M105 Printed in U S A

1 Page





DM7474 pdf, ピン配列
Switching Characteristics at VCC e 5V and TA e 25 C (See Section 1 for Test Waveforms and Output Load)
Symbol
Parameter
From (Input)
To (Output)
RL e 400X
CL e 15 pF
Min Max
Units
fMAX
Maximum Clock
Frequency
15 MHz
tPHL
Propagation Delay Time
Preset
High to Low Level Output
to Q
40 ns
tPLH
Propagation Delay Time
Preset
Low to High Level Output
to Q
25 ns
tPHL
Propagation Delay Time
High to Low Level Output
Clear
to Q
40 ns
tPLH
Propagation Delay Time
Low to High Level Output
Clear
to Q
25 ns
tPHL
Propagation Delay Time
Clock to
High to Low Level Output
Q or Q
40 ns
tPLH
Propagation Delay Time
Clock to
Low to High Level Output
Q or Q
25 ns
3


3Pages


DM7474 電子部品, 半導体
Physical Dimensions inches (millimeters) (Continued)
14-Lead Ceramic Flat Package (W)
Order Number 5474FMQB or DM5474W
NS Package Number W14B
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
systems which (a) are intended for surgical implant
into the body or (b) support or sustain life and whose
failure to perform when properly used in accordance
with instructions for use provided in the labeling can
be reasonably expected to result in a significant injury
to the user
2 A critical component is any component of a life
support device or system whose failure to perform can
be reasonably expected to cause the failure of the life
support device or system or to affect its safety or
effectiveness
National Semiconductor
Corporation
1111 West Bardin Road
Arlington TX 76017
Tel 1(800) 272-9959
Fax 1(800) 737-7018
National Semiconductor
Europe
Fax (a49) 0-180-530 85 86
Email cnjwge tevm2 nsc com
Deutsch Tel (a49) 0-180-530 85 85
English Tel (a49) 0-180-532 78 32
Fran ais Tel (a49) 0-180-532 93 58
Italiano Tel (a49) 0-180-534 16 80
National Semiconductor
Hong Kong Ltd
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Ocean Centre 5 Canton Rd
Tsimshatsui Kowloon
Hong Kong
Tel (852) 2737-1600
Fax (852) 2736-9960
National Semiconductor
Japan Ltd
Tel 81-043-299-2309
Fax 81-043-299-2408
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

6 Page



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データシートを活用すると、その部品の主な機能と仕様を詳しく理解できます。 ピン構成、電気的特性、動作パラメータ、性能を確認してください。


共有リンク

Link :


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DM7473N

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DM7474

Dual Positive-Edge-Triggered D-Type Flip-Flops with Preset/ Clear and Complementary Outputs

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