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Part Name
Description
74HC148 View Datasheet(PDF) - Hitachi -> Renesas Electronics
Part Name
Description
MFG CO.
74HC148
8-to-3-line Octal Priority Encoder
Hitachi -> Renesas Electronics
74HC148 Datasheet PDF : 8 Pages
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HD74HC148
AC Characteristics
(C
L
= 50 pF, Input t
r
= t
f
= 6 ns)
Ta = 25
°
C
Ta = –40 to
+85
°
C
Item
Symbol
Propagation delay t
PLH
time
t
PHL
V
CC
(V)
2.0
4.5
6.0
Min Typ Max Min
— — 230 —
— 15 46 —
— — 39 —
Max Unit
290 ns
58
49
t
PLH
2.0
— — 250 — 315 ns
t
PHL
4.5
— 16 50 — 63
6.0
— — 43 — 54
t
PLH
2.0
— — 270 — 340 ns
t
PHL
4.5
— 18 54 — 68
6.0
— — 46 — 58
t
PLH
2.0
— — 230 — 290 ns
t
PHL
4.5
— 12 46 — 58
6.0
— — 39 — 49
t
PLH
2.0
— — 250 — 315 ns
t
PHL
4.5
— 12 50 — 63
6.0
— — 43 — 54
t
PLH
2.0
— — 270 — 340 ns
t
PHL
4.5
— 12 54 — 68
6.0
— — 46 — 58
Output rise/fall
t
TLH
time
t
THL
2.0
— — 75 — 90 ns
4.5
— 5 15 — 19
6.0
— — 13 — 16
Input capacitance Cin
—
— 5 10 — 10 pF
Test Conditions
0 - 7 to A
0
- A
2
0 - 7 to EO
0 - 7 to GS
EI to A
0
- A
2
EI to GS
EI to EO
4
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