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參數(shù)資料
| 型號： | 74ALS646 |
| 廠商： | NXP Semiconductors N.V. |
| 英文描述： | Transceiver/register |
| 中文描述： | 收發(fā)器/注冊 |
| 文件頁數(shù)： | 5/13頁 |
| 文件大?。?/td> | 155K |
| 代理商： | 74ALS646 |
Philips Semiconductors
Product specification
74ALS646/74ALS646-1
74ALS648/74ALS648-1
Transceiver/register
1991 Feb 08
5
LOGIC SYMBOL – 74ALS646/646-1
V
= Pin 24
GND = Pin 12
A0
OE
B0
1D
C1
1D
C1
DIR
CPBA
SBA
CPAB
SAB
1 OF 8 CHANNELS
TO 7 OTHER CHANNELS
21
4
20
3
23
22
1
2
SC00124
LOGIC SYMBOL – 74ALS648/648-1
V
= Pin 24
GND = Pin 12
A0
OE
B0
1D
C1
1D
C1
DIR
CPBA
SBA
CPAB
SAB
1 OF 8 CHANNELS
TO 7 OTHER CHANNELS
21
4
20
3
23
22
1
2
SC00125
FUNCTION TABLE
INPUTS
DATA I/O
OPERATING MODE
OE
DIR
CPAB
CPBA
SAB
SBA
An
Bn
74ALS646/74ALS646-1
74ALS648/74ALS648-1
X
X
↑
X
X
X
Input
Unspecified*
Store A, B unspecified*
Store A, B unspecified*
X
X
X
↑
↑
X
X
Unspecified*
Input
Store B, A unspecified*
Store B, A unspecified*
H
X
↑
X
X
Input
Input
Store A and B data
Store A and B data
H
X
H or L
H or L
X
X
Input
Input
Isolation, hold storage
Isolation, hold storage
L
L
X
X
X
L
Output
Input
Real time B data to A bus
Real time B data to A bus
L
L
X
H or L
X
H
Output
Input
Stored B data to A bus
Stored B data to A bus
L
H
X
X
L
X
Input
Output
Real time A data to B bus
Real time A data to B bus
L
H
H or L
X
H
X
Input
Output
Stored A data to B bus
Stored A data to B bus
NOTES:
H =
L
=
X =
*
=
High voltage level
Low voltage level
Don’t care
The data output function may be enabled or disabled by various signals at the OE and DIR inputs. 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.
Low-to-High clock transition
↑
=
相關PDF資料 |
PDF描述 |
|---|---|
| 74ALS646-1D | Transceiver/register |
| 74ALS646-1N | Transceiver/register |
| 74ALS646D | Transceiver/register |
| 74ALS646N | Transceiver/register |
| 74ALS648 | Transceiver/register |
相關代理商/技術參數(shù) |
參數(shù)描述 |
|---|---|
| 74ALS646-1 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Transceiver/register |
| 74ALS646-1D | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Transceiver/register |
| 74ALS646-1N | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Transceiver/register |
| 74ALS646D | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:Transceiver/register |
| 74ALS646FN | 制造商:Rochester Electronics LLC 功能描述:- Bulk |
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