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參數(shù)資料
| 型號： | DM74AS651 |
| 廠商： | Fairchild Semiconductor Corporation |
| 英文描述： | Octal Bus Transceiver and Register |
| 中文描述： | 八路總線收發(fā)器和注冊 |
| 文件頁數(shù)： | 2/8頁 |
| 文件大小： | 71K |
| 代理商： | DM74AS651 |
www.fairchildsemi.com
2
D
Connection Diagram
Function Table
H
=
HIGH Level
L
=
LOW Level
X
=
Irrelevant
↑
=
LOW-to-HIGH Transition
Note 1:
The data output functions may be enabled or disabled by various signals at the GAB and GBA 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.
Note 2:
If the select control is LOW, the clocks can occur simultaneously. If the select control is HIGH, the clocks must be staggered in order to load both
registers.
INPUTS
DATA I/O (Note 1)
OPERATION OR FUNCTION
GAB GBA
CAB
CBA
SAB
SBA
A1
THRU
A8
B1
THRU
B8
DM74AS651
DM74AS652
L
L
H
H
H or L H or L
↑
X
X
X
X
Input
Input
Isolation
Store A and B Data
Isolation
Store A and B Data
↑
L
L
X
X
X
L
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
L
L
X
H or L
X
H
H
H
X
X
L
X
Input
Output
Real Time A Data to B
Bus
Stored A Data to B Bus
Real Time A Data to B
Bus
Stored A Data to B Bus
H
H
H or L
X
H
X
H
L
H or L H or L
H
H
Output
Output
Stored A Data to B Bus
& Stored B Data to A Bus & Stored B Data to A Bus
Store A, Hold B
Stored A Data to B Bus
X
H
↑
H or L
X
X
Input
Unspecified
(Note 1)
Output
Store A, Hold B
H
H
↑
↑
X
(Note
2)
X
X
Input
Store A in both registers
Store A in both registers
L
X
H or L
↑
X
Unspecified
(Note 1)
Output
Input
Hold A, Store B
Hold A, Store B
L
L
↑
↑
X
X
(Note
2)
Input
Store B in both registers
Store B in both registers
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| DM74AS651NT | 功能描述:總線收發(fā)器 Oct Bus Tran and 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 |
| DM74AS651WM | 功能描述:總線收發(fā)器 Oct Bus Tran and 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 |
| DM74AS651WMX | 功能描述:總線收發(fā)器 Oct Bus Tran and 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 |
| DM74AS652NT | 功能描述:總線收發(fā)器 Oct Bus Tran and 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 |
| DM74AS652WM | 功能描述:總線收發(fā)器 Oct Bus Tran and 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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