參數(shù)資料
型號: HCT652
廠商: NXP Semiconductors N.V.
英文描述: Octal bus transceiver/register; 3-state
中文描述: 八路總線收發(fā)器/冊;三態(tài)
文件頁數(shù): 4/10頁
文件大?。?/td> 104K
代理商: HCT652
September 1993
4
Philips Semiconductors
Product specification
Octal bus transceiver/register; 3-state
74HC/HCT652
FUNCTION TABLE
Notes
1.
H = HIGH voltage level
L = LOW voltage level
X = don’t care
= LOW-to-HIGH transition
The data output functions may be enabled or disabled by various signals at OE
AB
and OE
BA
inputs. Data input
functions are always enabled, i.e., data at the bus inputs will be stored on every LOW-to-HIGH transition on the clock
inputs.
2.
INPUTS
(1)
DATA I/O
(2)
OPERATION OR FUNCTION
OE
AB
L
L
X
H
L
L
L
L
H
H
OE
BA
H
H
H
H
X
L
L
L
H
H
CP
AB
H or L
H or L
X
X
X
H or L
CP
BA
H or L
H or L
X
H or L
X
X
S
AB
X
X
X
L
X
X
X
X
L
H
S
BA
X
X
X
X
X
L
L
H
X
X
A
1
THRU A
8
B
1
THRU B
8
HC/HCT652
Input
Input
Isolation
Store A and B data
Store A, Hold B
Store A in both registers
Hold A, Store B
Store B in both registers
Real Time B Data to A Bus
Stored B Data to A Bus
Real Time A Data to B Bus
Stored A Data to B Bus
Stored A Data to B Bus and
Stored B Data to A Bus
Input
Input
Not specified
Output
Input
Input
Not specified
Ouput
Ouput
Input
Input
Output
H
L
H or L
H or L
H
H
Output
Output
Fig.4 Functional diagram.
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