參數(shù)資料
型號: 74LS147
廠商: Texas Instruments, Inc.
英文描述: 10-LINE TO 4-LINE AND 8-LINE TO 3-LINE PRIORITY ENCODERS
中文描述: 10線的4線和8線三線優(yōu)先編碼器
文件頁數(shù): 13/22頁
文件大?。?/td> 623K
代理商: 74LS147
SDLS053B OCTOBER 1976 REVISED MAY 2004
13
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
APPLICATION INFORMATION
0
1
2 3
4
5
6 7 EI
EO
A0
A1
A2 GS
’148/’LS148
0
1
2 3
4
5
6 7 EI
EO
A0
A1
A2
GS
’148/LS148
’08/’LS08
0
1
2 3
4
5
6 7
9 10 11 12 13 14 15
Enable
(active low)
0
1
2
3
Encoded Data (active low)
Priority Flag
(active low)
16-Line Data (active low)
0
1
2 3
4
5
6 7 EI
EO A0
A1
A2 GS
’148/’LS148
0
1
2 3
4
5
6 7 EI
EO
A0
A1
A2
GS
’148/’LS148
’HC00
0
1
2 3
4
5
6 7
8
9 10 11 12 13 14 15
Enable
(active low)
0
1
2
3
Encoded Data (active high)
Priority Flag
(active high)
16-Line Data (active low)
8
Figure 3. Priority Encoder for 16 Bits
Because the ’147/’LS147 and ’148/’LS148 devices are combinational logic circuits, wrong addresses can appear
during input transients. Moreover, for the ’148/’LS148 devices, a change from high to low at EI can cause a transient
low on GS when all inputs are high. This must be considered when strobing the outputs.
相關PDF資料
PDF描述
74148 10-LINE TO 4-LINE AND 8-LINE TO 3-LINE PRIORITY ENCODERS
74LS147 10-LINE-TO-4-LINE AND 8-LINE-TO-3-LINE PRIORITY ENCODERS
74LS148 8-line-to-3-line Octal Priority Encoders
74LS148 10-LINE TO 4-LINE AND 8-LINE TO 3-LINE PRIORITY ENCODERS
74LS148 10-LINE-TO-4-LINE AND 8-LINE-TO-3-LINE PRIORITY ENCODERS
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