Datasheet

6
LE Pulse Width t
W
250- -65-75- ns
4.5 10 - - 13 - 15 - ns
6 9 - - 1 - 13 - ns
HCT TYPES
An to LE Setup Time t
SU
4.5 10 - - 13 - 15 - ns
An to LE Hold Time
t
H
CD74HCT137 4.5 7 - - 9 - 11 - ns
CD74HCT237 t
H
4.55--5-5-ns
LE Pulse Width t
W
4.5 10 - - 13 - 15 - ns
Switching Specifications Input t
r
, t
f
= 6ns
PARAMETER SYMBOL
TEST
CONDITIONS V
CC
(V)
25
o
C
-40
o
C TO
85
o
C -55
o
C TO 125
o
C
UNITSMIN TYP MAX MIN MAX MIN MAX
HC TYPES
Propagation Delay
CD74HC137, CD74HCT137
t
PLH,
t
PHL
C
L
= 50pF 2 - - 180 - 225 - 270 ns
An to any Y 4.5 - - 36 - 45 - 54 ns
6 - - 31 - 38 - 46 ns
Propagation Delay
’HC237, CD74HCT237
t
PLH,
t
PHL
C
L
= 50pF 2 - - 160 - 200 - 240 ns
An to any Y 4.5 - - 32 - 40 - 48 ns
6 - - 27 - 34 - 41 ns
Address to Output
CD74HC137 t
PLH
, t
PHL
C
L
= 15pF 5 5 15 - - - - - ns
’HC237 t
PLH
, t
PHL
C
L
= 15pF 5 - 13 - - - - - ns
OE
0
to any Y or Y t
PLH,
t
PHL
C
L
= 50pF 2 - - 145 - 180 - 220 ns
4.5 - - 29 - 36 - 44 ns
6 - - 25 - 31 - 38 ns
OE
1
to any Y or Y t
TLH
, t
THL
C
L
= 50pF 2 - - 145 - 180 - 220 ns
4.5 - - 29 - 36 - 44 ns
6 - - 25 - 31 - 38 ns
LE to any Y or Y t
TLH
, t
THL
C
L
= 50pF 2 - - 190 - 240 - 285 ns
4.5 - - 38 - 48 - 57 ns
6 - - 32 - 41 - 48 ns
Power Dissipation
Capacitance, (Notes 3, 4)
CD74HC137 C
PD
C
L
= 15pF 5 - 19 - - - - - pF
’HC237 C
PD
C
L
= 15pF 5 - 23 - - - - - pF
Output Transition Time t
TLH
, t
THL
C
L
= 50pF 2 - - 75 - 95 - 110 ns
4.5 - - 15 - 19 - 22 ns
6 - - 13 - 16 - 19 ns
Input Capacitance C
I
- - - - 10 - 10 - 10 pF
Prerequisite For Switching Specifications (Continued)
PARAMETER SYMBOL
V
CC
(V)
25
o
C -40
o
C TO 85
o
C -55
o
C TO 125
o
C
UNITSMIN TYP MAX MIN MAX MIN MAX
CD74HC137, CD74HCT137, CD54HC237, CD74HC237, CD74HCT237