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參數資料
| 型號： | 935051260112 |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 總線收發(fā)器 |
| 英文描述： | HC/UH SERIES, OCTAL 1-BIT REGISTERED TRANSCEIVER, TRUE OUTPUT, PDIP24 |
| 封裝： | PLASTIC, DIP-24 |
| 文件頁數： | 5/10頁 |
| 文件大?。?/td> | 99K |
| 代理商： | 935051260112 |
September 1993
4
Philips Semiconductors
Product specication
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
2. The data output functions may be enabled or disabled by various signals at OEAB and OEBA 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.
INPUTS (1)
DATA I/O (2)
OPERATION OR FUNCTION
OEAB OEBA
CPAB
CPBA
SAB
SBA
A1 THRU A8
B1 THRU B8
HC/HCT652
L
H
H or L
X
Isolation
LH
↑↑
X
Store A and B data
XH
↑
H or L
X
Input
Not specied
Store A, Hold B
HH
↑↑
L
X
Input
Output
Store A in both registers
L
X
H or L
↑
X
Not specied
Input
Hold A, Store B
LL
↑↑
X
L
Ouput
Input
Store B in both registers
LL
X
L
Ouput
Input
Real Time B Data to A Bus
L
X
H or L
X
H
Stored B Data to A Bus
HH
X
L
X
Input
Output
Real Time A Data to B Bus
H
H or L
X
H
X
Stored A Data to B Bus
H
L
H or L
H
Output
Stored A Data to B Bus and
Stored B Data to A Bus
Fig.4 Functional diagram.
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