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Número de pieza
componentes Descripción
HD74HC670 Ver la hoja de datos (PDF) - Hitachi -> Renesas Electronics
Número de pieza
componentes Descripción
Fabricante
HD74HC670
4-by-4 Register File (with 3-state outputs)
Hitachi -> Renesas Electronics
HD74HC670 Datasheet PDF : 10 Pages
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HD74HC670
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
— — 160 —
— 21 32 —
— — 27 —
Max Unit
200 ns
40
34
t
PLH
2.0
— — 200 — 250 ns
t
PHL
4.5
— 24 40 — 50
6.0
— — 34 — 43
t
PLH
2.0
— — 150 — 190 ns
t
PHL
4.5
— 18 30 — 38
6.0
— — 26 — 33
Output enable
t
ZH
time
t
ZL
2.0
— — 150 — 190 ns
4.5
— 18 30 — 38
6.0
— — 26 — 33
Output disable
t
HZ
time
t
LZ
2.0
— — 150 — 190 ns
4.5
— 17 30 — 38
6.0
— — 26 — 33
Pulse width
t
w
2.0
80 — — 100 — ns
4.5
16 — — 20 —
6.0
14 — — 17 —
Setup time
t
su
2.0
60 — — 75 — ns
4.5
12 4 — 15 —
6.0
10 — — 13 —
t
su
2.0
60 — — 75 — ns
4.5
12 — — 15 —
6.0
10 — — 13 —
Hold time
t
h
2.0
50 — — 63 — ns
4.5
10 6 — 13 —
6.0
9 — — 11 —
2.0
50 — — 63 — ns
4.5
10 — — 13 —
6.0
9 — — 11 —
Test Conditions
Read select to Q
Write enable to Q
Data to Q
Data to Write enable
Write select to Write enable
Write enable to Data
Write enable to Write select
5
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