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부품번호 | 54F651 기능 |
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기능 | Transceivers/Registers | ||
제조업체 | National Semiconductor | ||
로고 | |||
전체 10 페이지수
December 1994
54F 74F651 54F 74F652
Transceivers Registers
General Description
These devices consist of bus transceiver circuits with
D-type flip-flops and control circuitry arranged for multi-
plexed transmission of data directly from the input bus or
from internal registers Data on the A or B bus will be
clocked into the registers as the appropriate clock pin goes
to HIGH logic level Output Enable pins (OEAB OEBA) are
provided to control the transceiver function
Features
Y Independent registers for A and B buses
Y Multiplexed real-time and stored data
Y Choice of non-inverting and inverting data paths
’F651 inverting
’F652 non-inverting
Y Guaranteed 4000V minimum ESD protection
Commercial
74F651SPC
74F651SC (Note 1)
74F652SPC
74F652SC (Note 1)
Military
54F651SDM (Note 2)
54F651FM (Note 2)
54F651LM (Note 2)
54F652SDM (Note 2)
54F652FM (Note 2)
54F652LM (Note 2)
Package
Number
N24C
J24F
M24B
W24C
E28A
N24C
J24F
M24B
W24C
E28A
Package Description
24-Lead (0 300 Wide) Molded Dual-In-Line
24-Lead (0 300 Wide) Ceramic Dual-In-Line
24-Lead (0 300 Wide) Molded Small Outline JEDEC
24-Lead Cerpack
24-Lead Ceramic Leadless Chip Carrier Type C
24-Lead (0 300 Wide) Molded Dual-In-Line
24-Lead (0 300 Wide) Ceramic Dual-In-Line
24-Lead (0 300 Wide) Molded Small Outline JEDEC
24-Lead Cerpack
24-Lead Ceramic Leadless Chip Carrier Type C
Note 1 Devices also available in 13 reel Use suffix e SCX
Note 2 Military grade device with environmental and burn-in processing Use suffix e DMQB FMQB and LMQB
Connection Diagrams
Pin Assignment
DIP SOIC and Flatpak
Pin Assignment
for LCC
TL F 9581 – 3
TRI-STATE is a registered trademark of National Semiconductor Corporation
C1995 National Semiconductor Corporation TL F 9581
TL F 9581 – 4
RRD-B30M75 Printed in U S A
Functional Description
In the transceiver mode data present at the HIGH imped-
ance port may be stored in either the A or B register or both
The select (SAB SBA) controls can multiplex stored and
real-time
The examples in Figure 1 demonstrate the four fundamental
bus-management functions that can be performed with the
Octal bus transceivers and receivers
Data on the A or B data bus or both can be stored in the
internal D flip-flop by LOW to HIGH transitions at the appro-
Note A Real-Time
Transfer Bus B to Bus A
Note B Real-Time
Transfer Bus A to Bus B
priate Clock Inputs (CPAB CPBA) regardless of the Select
or Output Enable Inputs When SAB and SBA are in the real
time transfer mode it is also possible to store data without
using the internal D flip-flops by simultaneously enabling
OEAB and OEBA In this configuration each Output reinforc-
es its Input Thus when all other data sources to the two
sets of bus lines are in a HIGH impedance state each set of
bus lines will remain at its last state
Note C Storage
Note D Transfer Storage
Data to A or B
TL F 9581–6
OEAB OEBA CPAB CPBA SAB SBA
L L X X XL
TL F 9581– 7
OEAB OEBA CPAB CPBA SAB SBA
H H X X LX
TL F 9581 – 8
OEAB
X
L
L
OEBA
H
X
H
CPAB
L
X
L
CPBA
X
L
L
SAB
X
X
X
SBA
X
X
X
TL F 9581 – 9
OEAB OEBA CPAB CPBA SAB SBA
H
L H or L H or L H
X
FIGURE 1
Inputs
Inputs Outputs (Note 1)
Operating Mode
OEAB
L
L
OEBA
H
H
CPAB
H or L
L
CPBA
H or L
L
SAB
X
X
SBA
X
X
A0 thru A7
Input
B0 thru B7
Input
Isolation
Store A and B Data
X
H
L H or L
X
X Input
Not Specified Store A Hold B
H
H
LL
X
X Input
Output
Store A in Both Registers
L
X
H or L
L
X
X Not Specified Input
Hold A Store B
L L L L X X Output
Input
Store B in Both Registers
L L X X X L Output
L
L
X
H or L
X
H
Input
Real-Time B Data to A Bus
Store B Data to A Bus
H H X X LX
Input
H
H H or L X
HX
Output
Real-Time A Data to B Bus
Stored A Data to B Bus
H
L
H or L H or L
H
H Output
Output
Stored A Data to B Bus and
Stored B Data to A Bus
H e HIGH Voltage Level
L e LOW Voltage Level
X e Immaterial
L e LOW to HIGH Clock Transition
Note 1 The data output functions may be enabled or disabled by various signals at OEAB or OEBA inputs Data input functions are always enabled i e data at the
bus pins will be stored on every LOW to HIGH transition on the clock inputs
4
4페이지 7
7페이지 | |||
구 성 | 총 10 페이지수 | ||
다운로드 | [ 54F651.PDF 데이터시트 ] |
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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 |
54F651 | Transceivers/Registers | National Semiconductor |
54F651 | 54F651 54F652 74F651 74F652 Transceivers and Registers (Rev. A) | Texas Instruments |
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