參數(shù)資料
型號(hào): MC74LVQ646
廠商: Motorola, Inc.
英文描述: LOW-VOLTAGE CMOS OCTAL TRANSCEIVER/ REGISTERED TRANSCEIVER
中文描述: 低電壓CMOS八端口收發(fā)器/注冊(cè)收發(fā)器
文件頁(yè)數(shù): 2/10頁(yè)
文件大?。?/td> 230K
代理商: MC74LVQ646
LOGIC DIAGRAM
C
D
Q
OE
DIR
CBA
SBA
SAB
CAB
C
D
Q
A0
B0
1 of 8 Channels
To 7 Other Channels
1
3
21
22
2
23
MC74LVQ646
MOTOROLA
LVQ DATA
BR1478
2
FUNCTION TABLE
Inputs
Storage
Registers
Data
Ports
Operating Mode
OE
DIR
CAB
CBA
SAB
SBA
QA
QB
An
Bn
Operating Mode
H
X
Input
Input
X
X
NC
NC
X
X
Isolation, Hold Storage
X
X
L
H
X
X
X
X
L
H
L
H
X
X
X
X
L
H
Store A and/or B Data
L
H
Input
Output
X*
L
X
NC
NC
NC
NC
L
H
L
H
Real Time A Data to B Bus
H
X
NC
NC
X
QA
Stored A Data to B Bus
X*
L
X
L
H
NC
NC
L
H
L
H
Real Time A Data to B Bus;
Store A Data
H
X
L
H
NC
NC
L
H
QA
QA
Stored A Data to B Bus;
Store A Data
L
L
Output
Input
X*
X
L
NC
NC
NC
NC
L
H
L
H
Real Time B Data to A Bus
X
H
NC
NC
QB
X
Stored B Data to A Bus
X*
X
L
NC
NC
L
H
L
H
L
H
Real Time B Data to A Bus;
Store B Data
X
H
NC
NC
L
H
QB
QB
L
H
Stored B Data to A Bus;
Store B Data
H = High Voltage Level; L = Low Voltage Level; X = Don’t Care;
= Low–to–High Clock Transition;
= NOT Low–to–High Clock Transition; NC = No Change; * = The
clocks are not internally gated with either the Output Enables or the Source Inputs. Therefore, data at the A or B ports may be clocked into the storage registers, at any
time. For ICC reasons, Do Not Float Inputs.
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