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부품번호 | DM74LS251 기능 |
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기능 | TRI-STATE Data Selectors/Multiplexers | ||
제조업체 | National Semiconductor | ||
로고 | |||
전체 6 페이지수
June 1989
DM54LS251 DM74LS251
TRI-STATE Data Selectors Multiplexers
General Description
These data selectors multiplexers contain full on-chip bina-
ry decoding to select one-of-eight data sources and feature
a strobe-controlled TRI-STATE output The strobe must be
at a low logic level to enable these devices The TRI-STATE
outputs permit direct connection to a common bus When
the strobe input is high both outputs are in a high-imped-
ance state in which both the upper and lower transistors of
each totem-pole output are off and the output neither drives
nor loads the bus significantly When the strobe is low the
outputs are activated and operate as standard TTL totem-
pole outputs
To minimize the possibility that two outputs will attempt to
take a common bus to opposite logic levels the output con-
trol circuitry is designed so that the average output disable
time is shorter than the average output enable time
Features
Y TRI-STATE version of LS151
Y Interface directly with system bus
Y Perform parallel-to-serial conversion
Y Permit multiplexing from N-lines to one line
Y Complementary outputs provide true and inverted data
Y Maximum number of common outputs
54LS 49
74LS 129
Y Typical propagation delay time (D to Y)
54LS 17 ns
74LS 17 ns
Y Typical power dissipation
54LS 35 mW
74LS 35 mW
Connection Diagram
Dual-In-Line Package
Function Table
Inputs
Outputs
Select
Strobe Y W
CBA
S
XXX
H
ZZ
L L L L D0 D0
L L H L D1 D1
L H L L D2 D2
L H H L D3 D3
H L L L D4 D4
H L H L D5 D5
H H L L D6 D6
H H H L D7 D7
H e High Logic Level L e Low Logic Level
X e Don’t Care Z e High Impedance (Off)
D0 D1 D7 e The level of the respective D input
TL F 6415 – 1
Order Number DM54LS251J DM54LS251W
DM74LS251M or DM74LS251N
See NS Package Number J16A M16A N16E or W16A
TRI-STATE is a registered trademark of National Semiconductor Corporation
C1995 National Semiconductor Corporation TL F 6415
RRD-B30M105 Printed in U S A
Physical Dimensions inches (millimeters)
16-Lead Ceramic Dual-In-Line Package (J)
Order Number DM54LS251J
NS Package Number J16A
4
4페이지 | |||
구 성 | 총 6 페이지수 | ||
다운로드 | [ DM74LS251.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 |
DM74LS251 | TRI-STATE Data Selectors/Multiplexers | National Semiconductor |
DM74LS251 | 3-STATE 1-of-8 Line Data Selector/Multiplexer | Fairchild Semiconductor |
DataSheet.kr | 2020 | 연락처 | 링크모음 | 검색 | 사이트맵 |