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부품번호 | 54LS74 기능 |
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기능 | Dual Positive-Edge-Triggered D Flip-Flops | ||
제조업체 | National Semiconductor | ||
로고 | |||
전체 6 페이지수
www.DataSheet4U.com
June 1989
54LS74 DM54LS74A DM74LS74A
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 (54LS74) is avail-
able Contact a National Semiconductor Sales Office
Distributor for specifications
Connection Diagram
Dual-In-Line Package
Function Table
TL F 6373 – 1
Order Number 54LS74DMQB 54LS74FMQB 54LS74LMQB
DM54LS74AJ DM54LS74AW DM74LS74AM or DM74LS74AN
See NS Package Number E20A J14A M14A N14A or W14B
Inputs
Outputs
PR CLR CLK D
Q
Q
LH
XXH
L
HL
XX L
H
LL
X XH
H
H
H
uH
H
L
H H uL L 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
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 6373
RRD-B30M105 Printed in U S A
www.DataSheet4U.com
Physical Dimensions inches (millimeters)
Ceramic Leadless Chip Carrier Package (E)
Order Number 54LS74LMQB
NS Package Number E20A
14-Lead Ceramic Dual-In-Line Package (J)
Order Number 54LS74DMQB or DM54LS74AJ
NS Package Number J14A
4
4페이지 | |||
구 성 | 총 6 페이지수 | ||
다운로드 | [ 54LS74.PDF 데이터시트 ] |
당사 플랫폼은 키워드, 제품 이름 또는 부품 번호를 사용하여 검색할 수 있는 |
구매 문의 | 일반 IC 문의 : 샘플 및 소량 구매 ----------------------------------------------------------------------- IGBT, TR 모듈, SCR 및 다이오드 모듈을 포함한 광범위한 전력 반도체를 판매합니다. 전력 반도체 전문업체 상호 : 아이지 인터내셔날 사이트 방문 : [ 홈페이지 ] [ 블로그 1 ] [ 블로그 2 ] |
부품번호 | 상세설명 및 기능 | 제조사 |
54LS74 | Dual Positive-Edge-Triggered D Flip-Flops | National Semiconductor |
54LS74A | 54LS74 DM54LS74A Dual Pos-Edge-Trig D FFlops w/Preset Clear Compl Out (Rev. A) | Texas Instruments |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |