Datasheet
SCLS143D − DECEMBER 1982 − REVISED JULY 2003
5
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
switching characteristics over recommended operating free-air temperature range, C
L
= 50 pF
(unless otherwise noted) (see Figure 1)
PARAMETER
FROM
TO
V
CC
T
A
= 25°C SN54HC393 SN74HC393
UNIT
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
V
CC
MIN TYP MAX MIN MAX MIN MAX
UNIT
2 V 6 10 4.2 5
f
max
CLK Q
A
4.5 V 31 50 21 25
MHz
f
max
CLK
Q
A
6 V 36 60 25 28
MHz
2 V 50 120 180 150
Q
A
4.5 V 15 24 36 30
Q
A
6 V 13 20 31 26
2 V 72 190 285 240
Q
B
4.5 V 22 38 57 47
t
pd
CLK
Q
B
6 V 18 32 48 40
ns
t
pd
CLK
2 V 91 240 360 300
ns
Q
C
4.5 V 28 48 72 60
Q
C
6 V 22 41 61 51
2 V 100 290 430 360
Q
D
4.5 V 32 58 87 72
Q
D
6 V 24 50 74 62
2 V 45 165 250 205
t
PHL
CLR Any
4.5 V 17 33 49 41
ns
t
PHL
CLR
Any
6 V 14 28 42 35
ns
2 V 28 75 110 95
t
t
Any
4.5 V 8 15 22 19
ns
t
t
Any
6 V 6 13 19 16
ns
operating characteristics, T
A
= 25°C
PARAMETER TEST CONDITIONS TYP UNIT
C
pd
Power dissipation capacitance per counter No load 40 pF