參數(shù)資料
型號(hào): DM74ALS646NT
廠商: FAIRCHILD SEMICONDUCTOR CORP
元件分類(lèi): 通用總線功能
英文描述: Octal 3-STATE Bus Transceiver and Register
中文描述: ALS SERIES, 8-BIT REGISTERED TRANSCEIVER, TRUE OUTPUT, PDIP24
封裝: 0.300 INCH, PLASTIC, MS-001, DIP-24
文件頁(yè)數(shù): 2/6頁(yè)
文件大?。?/td> 56K
代理商: DM74ALS646NT
www.fairchildsemi.com
2
D
Connection Diagram
Function Table
H
=
HIGH Logic Level
L
=
LOW Logic Level
X
=
Don’t Care (Either LOW or HIGH Logic Levels including transitions)
H/L
=
Either LOW or HIGH Logic Level excluding transitions
=
Positive going edge of pulse
Note 1:
The data output functions may be enabled or disabled by various signals at the G 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 on the clock inputs.
Logic Diagram
Inputs
Data I/O (Note 1)
Operation or Function
G
X
X
H
H
L
L
L
L
DIR
X
X
X
X
L
L
H
H
CAB CBA SAB SBA
X
X
H/L
H/L
X
X
X
H/L
X
X
H/L
X
A1 thru A8
Input
Not Specified
Input
Input
Output
Output
Input
Input
B1 thru B8
Not Specified Store A, B Unspecified
Input
Store B, A Unspecified
Input
Store A and B Data
Input
Isolation, Hold Storage
Input
Real-Time B Data to a Bus
Input
Stored B Data to a Bus
Output
Real-Time A Data to B Bus
Output
Stored A Data to B Bus
X
X
X
X
X
X
L
H
X
X
X
X
L
H
X
X
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DM74ALS648 WAF 制造商:Texas Instruments 功能描述: