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74HC670DB Datasheet(PDF) 7 Page - NXP Semiconductors

No. de pieza 74HC670DB
Descripción Electrónicos  4 x 4 register file 3-state
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Fabricante Electrónico  PHILIPS [NXP Semiconductors]
Página de inicio  http://www.nxp.com
Logo PHILIPS - NXP Semiconductors

74HC670DB Datasheet(HTML) 7 Page - NXP Semiconductors

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December 1990
7
Philips Semiconductors
Product specification
4 x 4 register file; 3-state
74HC/HCT670
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; tr =tf = 6 ns; CL =50pF
SYMBOL
PARAMETER
Tamb (°C)
UNIT
TEST CONDITIONS
74HCT
VCC
(V)
WAVEFORMS
+25
−40 to +85 −40 to +125
min.
typ.
max. min. max. min.
max.
tPHL/ tPLH
propagation delay
RA, RB to Qn
21
40
50
60
ns
4.5
Fig.6
tPHL/ tPLH
propagation delay
WE to Qn
28
50
63
75
ns
4.5
Fig.7
tPHL/ tPLH
propagation delay
Dn to Qn
27
50
63
75
ns
4.5
Fig.7
tPZH/ tPZL
3-state output enable time
RE to Qn
18
35
44
53
ns
4.5
Fig.9
tPHZ/ tPLZ
3-state output disable time
RE to Qn
19
35
44
53
ns
4.5
Fig.9
tTHL/ tTLH
output transition time
5
12
15
18
ns
4.5
Fig.6
tW
write enable pulse width
LOW
18
9
23
27
ns
4.5
Fig.8
tsu
set-up time
Dn to WE
12
4
15
18
ns
4.5
Fig.8
tsu
set-up time
WA, WB to WE
12
−2
15
18
ns
4.5
Fig.8
th
hold time
Dn to WE
5
−1
5
5
ns
4.5
Fig.8
th
hold time
WA, WB to WE
5
0
5
5
ns
4.5
Fig.8
tlatch
latch time
WE to RA, RB
25
11
31
38
ns
4.5
Fig.8


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