Datasheet

6
HCT Input Loading Table
INPUT UNIT LOADS
All 0.5
NOTE: Unit Load is ∆I
CC
limit specified in DC Electrical Table, e.g.
360µA max at 25
o
C.
Prerequisite for Switching Specifications
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 TYP MAX MIN TYP MAX
HC TYPES
Input Pulse Widths t
WH
, t
WL
A, B 2 80 - - 100 - - 120 - - ns
4.5 16 - - 20 - - 24 - - ns
614- -17- -20- -ns
Rt
WL
2 80 - - 100 - - 120 - - ns
4.5 16 - - 20 - - 24 - - ns
614- -17- -20- -ns
Reset Recovery Time t
REC
25--5--5--ns
4.5 5 - - 5 - - 5 - - ns
65--5--5--ns
Retrigger Time
(Figure 11)
t
rT
5 - 175 - - - - - - - ns
HCT TYPES
Input Pulse Widths t
WH
, t
WL
A, B 4.5 16 - - 20 - - 24 - - ns
Rt
WL
4.5 20 - - 25 - - 30 - - ns
Reset Recovery Time t
REC
4.5 5 - - 5 - - 5 - - ns
Retrigger Time
(Figure 11)
t
rT
5 - 175 - - - - - - - ns
CD54HC4538, CD74HC4538, CD54HCT4538, CD74HCT4538