74hct670 NXP Semiconductors, 74hct670 Datasheet - Page 7

• Manufacturer Part Number: 74hct670
• Description: 4 X 4 Register File; 3-state
• Manufacturer: NXP Semiconductors

Philips Semiconductors
AC CHARACTERISTICS FOR 74HCT
GND = 0 V; t
December 1990
t
t
t
t
t
t
t
t
t
t
t
t
SYMBOL
PHL
PHL
PHL
PZH
PHZ
THL
W
su
su
h
h
latch
4 x 4 register file; 3-state
/ t
/ t
/ t
/ t
/ t
/ t
TLH
PLH
PLH
PLH
PZL
PLZ
propagation delay
propagation delay
propagation delay
3-state output enable time
3-state output disable time
output transition time
write enable pulse width
set-up time
set-up time
hold time
hold time
latch time
r
W
WE to R
= t
R
WE to Q
D
RE to Q
RE to Q
LOW
D
W
D
A
A
n
n
n
f
A
, W
, R
to Q
to WE
to WE
= 6 ns; C
, W
PARAMETER
B
B
B
to Q
n
to WE
A
n
n
to WE
n
, R
n
B
L
= 50 pF
18
12
12
5
5
25
min. typ. max. min. max. min. max.
21
28
27
18
19
5
9
4
0
11
2
1
25
40
50
50
35
35
12
7
T
74HCT
amb
23
15
15
5
5
31
40 to 85
( C)
50
63
63
44
44
15
27
18
18
5
5
38
40 to 125
60
75
75
53
53
18
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns
UNIT
74HC/HCT670
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
4.5
TEST CONDITIONS
V
(V)
Product specification
CC
Fig.6
Fig.7
Fig.7
Fig.9
Fig.9
Fig.6
Fig.8
Fig.8
Fig.8
Fig.8
Fig.8
Fig.8
WAVEFORMS