Priority Encoder
SN54147, SN54148, SN54LS147, SN54LS148 SN74147, SN74148 (TIM9907), SN74LS147, SN74LS148 10ĆLINE TO 4ĆLINE AND 8ĆLINE TO ...
Description
SN54147, SN54148, SN54LS147, SN54LS148 SN74147, SN74148 (TIM9907), SN74LS147, SN74LS148 10ĆLINE TO 4ĆLINE AND 8ĆLINE TO 3ĆLINE PRIORITY ENCODERS
SDLS053B − OCTOBER 1976 − REVISED MAY 2004
’147, ’LS147
D Encode 10-Line Decimal to 4-Line BCD D Applications Include:
− Keyboard Encoding − Range Selection
SN54147, SN54LS147 . . . J OR W PACKAGE SN74147, SN74LS147 . . . D OR N PACKAGE
(TOP VIEW)
’148, ’LS148
D Encode 8 Data Lines to 3-Line Binary
(Octal)
D Applications Include:
− n-Bit Encoding − Code Converters and Generators
SN54148, SN54LS148 . . . J OR W PACKAGE SN74148, SN74LS148 . . . D, N, OR NS PACKAGE
(TOP VIEW)
4 5 6 7 8 C B GND
1 2 3 4 5 6 7 8
16 VCC 15 NC 14 D 13 3 12 2 11 1 10 9 9A
4 5 6 7 EI A2 A1 GND
1 2 3 4 5 6 7 8
16 VCC 15 E0 14 GS 13 3 12 2 11 1 10 0 9 A0
SN54LS147 . . . FK PACKAGE (TOP VIEW)
SN54LS148 . . . FK PACKAGE (TOP VIEW)
3 2 1 20 19
64
18 D
75
17 3
NC 6
16 NC
87
15 2
C8
14 1
9 10 11 12 13
6
3 2 1 20 19 4 18
GS
75
17 3
NC 6
16 NC
EI 7
15 2
A2 8
14 1
9 10 11 12 13
B5 GND 4
NC NC A VCC 9 NC
A1 5 GND 4
NC NC A0 VCC
0 E0
NC − No internal connection
TYPE
’147 ’148 ’LS147 ’LS148
TYPICAL DATA DELAY
10 ns
10 ns
15 ns
15 ns
TYPICAL POWER DISSIPATION
225 mW
190 mW
60 mW
60 mW
NOTE: The SN54147, SN54LS147, SN54148, SN74147, SN74LS147, and SN74148 are obsolete and are no longer supplied.
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments se...
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