74147 |
|
Part Number | 74147 |
Manufacturer | Motorola |
Description | 10-LINE-TO-4-LINE AND 8-LINE-TO-3-LINE PRIORITY ENCODERS The SN54 / 74LS147 and the SN54 / 74LS148 are Priority Encoders. They provide priority decoding of the inputs to ensure that only the highest ... |
Features |
fferences between the LS148 and the LS748 are that (1) Pin 10 (input 0) has a fan-in of 2 on the LS748 versus a fan-in of 1 on the LS148; (2) Pins 1, 2, 3, 4, 11, 12 and 13 (inputs 1, 2, 3, 4, 5, 6, 7) have a fan-in of 3 on the LS748 versus a fan-in of 2 on the LS148.
The only ac difference is that tPHL from EI to EO is changed from 40 to 45 ns.
SN54 / 74LS147 (TOP VIEW)
OUTPUT
INPUTS
OUTPUT
VCC NC D 3 2 1 9 A 16 15 14 13 12 11 10 9
D 32 1 9 4A
5 678C B
1 2 3 4 56 78 4 5 6 7 8 C B GND
INPUTS
OUTPUTS
SN54 / 74LS148 SN54 / 74LS748
(TOP VIEW)
OUTPUTS
VCC EO GS 16 15 14
3 13
INPUTS 21... |
Document |
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