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參數(shù)資料
| 型號： | 7ABT646APWDH |
| 廠商： | NXP SEMICONDUCTORS |
| 元件分類： | 通用總線功能 |
| 英文描述： | Octal bus transceiver/register 3-State |
| 中文描述： | ABT SERIES, 8-BIT REGISTERED TRANSCEIVER, TRUE OUTPUT, PDSO24 |
| 封裝： | 4.40 MM, PLASTIC, MO-153AD, SOT-355-1, TSSOP-24 |
| 文件頁數(shù)： | 4/14頁 |
| 文件大?。?/td> | 117K |
| 代理商： | 7ABT646APWDH |
Philips Semiconductors
Product specification
74ABT646A
Octal bus transceiver/register (3-State)
1998 Feb 17
4
FUNCTION TABLE
INPUTS
DATA I/O
OPERATING MODE
OE
DIR
CPAB
CPBA
SAB
SBA
An
Bn
X
X
↑
X
X
X
Input
Unspecified
output*
Store A, B unspecified
X
X
X
↑
X
X
Unspecified
output*
Input
Store B, A unspecified
H
H
X
X
↑
H or L
↑
H or L
X
X
X
X
Input
Input
Store A and B data
Isolation, hold storage
L
L
L
L
X
X
X
H or L
X
X
L
H
Output
Input
Real time B data to A bus
Stored B data to A bus
L
L
H
H
X
H or L
X
X
L
H
X
X
Input
Output
Real time A data to B bus
Stored A data to B bus
H =
L
X =
↑
=
*
High voltage level
Low voltage level
Don’t care
Low-to-High clock transition
The data output function may be enabled or disabled by various signals at the OE input. Data input functions are always enabled, i.e.,
data at the bus pins will be stored on every Low-to-High transition of the clock.
=
LOGIC DIAGRAM
1D
C1
Q
19
18
17
16
15
14
13
B1
B2
B3
B4
B5
B6
B7
5
6
7
8
9
10
11
A1
A2
A3
A4
A5
A6
A7
DETAIL A X 7
OE
DIR
CPBA
SBA
CPAB
SAB
21
3
23
22
1
2
20
B0
1D
C1
Q
4
A0
1of 8 Channels
SA00086
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