參數(shù)資料
型號(hào): DM74AS646WM
廠商: FAIRCHILD SEMICONDUCTOR CORP
元件分類: 通用總線功能
英文描述: Octal Bus Transceiver and Register
中文描述: AS SERIES, 8-BIT REGISTERED TRANSCEIVER, TRUE OUTPUT, PDSO24
封裝: 0.300 INCH, MS-013, SOIC-24
文件頁數(shù): 2/8頁
文件大小: 82K
代理商: DM74AS646WM
www.fairchildsemi.com
2
D
Connection Diagram
Function Table
H—HIGH level; L—LOW level; X—irrelevant;
—LOW-to-HIGH level transition
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.
Inputs
Data I/O (Note 1)
Operation or Function
G
H
DIR
X
X
CAB
H or L H or L
X
X
CBA
SAB SBA A1 thru A8 B1 thru B8
X
X
Input
X
X
DM74AS646
DM74AS648
Input
Isolation, Hold Storage
Store A and B Data
Isolation, Hold Storage
Store A and B Data
X
L
L
L
X
X
L
H
Output
Input
Real Time B Data to A Bus
Stored B Data to A Bus
Real Time B Data to A Bus
Stored B Data to A Bus
H or L
L
H
H
X
X
X
L
H
X
X
Input
Output
Real Time A Data to B Bus
Stored A Data to B Bus
Store A, B Unspecified
(Note 1)
Store B, A Unspecified
(Note 1)
Real Time A Data to B Bus
Stored A Data to B Bus
Store A, B Unspecified
(Note 1)
Store B, A Unspecified
(Note 1)
H or L
X
X
X
X
X
Input
Unspecified
(Note 1)
X
X
X
X
X
Unspecified
(Note 1)
Input
相關(guān)PDF資料
PDF描述
DM74AS648NT 9-Bit Bus Transceiver With 3-State Outputs 24-SSOP -40 to 85
DM74AS646NT Octal Bus Transceiver and Register
DM74AS651 Octal Bus Transceiver and Register
DM74AS651NT 9-Bit Bus Transceiver With 3-State Outputs 24-TVSOP -40 to 85
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DM74AS648WMX 功能描述:總線收發(fā)器 Oct 3-STATE Bus Reg RoHS:否 制造商:Fairchild Semiconductor 邏輯類型:CMOS 邏輯系列:74VCX 每芯片的通道數(shù)量:16 輸入電平:CMOS 輸出電平:CMOS 輸出類型:3-State 高電平輸出電流:- 24 mA 低電平輸出電流:24 mA 傳播延遲時(shí)間:6.2 ns 電源電壓-最大:2.7 V, 3.6 V 電源電壓-最小:1.65 V, 2.3 V 最大工作溫度:+ 85 C 封裝 / 箱體:TSSOP-48 封裝:Reel
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