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参数资料
| 型号： | 74ALS648N |
| 厂商： | NXP SEMICONDUCTORS |
| 元件分类： | 通用总线功能 |
| 英文描述： | Transceiver/register |
| 中文描述： | ALS SERIES, 8-BIT REGISTERED TRANSCEIVER, INVERTED OUTPUT, PDIP24 |
| 封装： | 0.300 INCH, PLASTIC, DIP-24 |
| 文件页数： | 5/13页 |
| 文件大小： | 155K |
| 代理商： | 74ALS648N |
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
↑
=
相关PDF资料 |
PDF描述 |
|---|---|
| 74ALS651-1 | Octal transceiver/register, inverting (3-State)(八通道收发器/寄存器，反向（三态）) |
| 74ALS651 | Transceiver/register |
| 74ALS651D | Transceiver/register |
| 74ALS651N | Transceiver/register |
| 74ALS652 | Transceiver/register |
相关代理商/技术参数 |
参数描述 |
|---|---|
| 74ALS651 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Transceiver/register |
| 74ALS651-1 | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Transceiver/register |
| 74ALS651-1D | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Transceiver/register |
| 74ALS651-1N | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Transceiver/register |
| 74ALS651D | 制造商:PHILIPS 制造商全称:NXP Semiconductors 功能描述:Transceiver/register |
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