Datasheet

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    
SCLS121D − DECEMBER 1982 − REVISED OCTOBER 2003
8
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 SN54HC191 SN74HC191
UNIT
PARAMETER
FROM
(INPUT)
TO
(OUTPUT)
V
CC
MIN TYP MAX MIN MAX MIN MAX
UNIT
2 V 4.2 8 2.8 3.3
f
max
4.5 V 21 42 14 17
MHz
f
max
6 V 24 48 16 19
MHz
2 V 130 264 396 330
LOAD Any Q
4.5 V 40 53 79 66
LOAD
Any Q
6 V 33 45 67 56
Q
A
, Q
B
, Q
C
,
2 V 135 240 360 300
A, B, C, or D
Q
A
, Q
B
, Q
C
,
or Q
D
4.5 V 36 48 72 60
A, B, C, or D
or Q
D
6 V 30 41 61 51
2 V 58 120 180 150
RCO
4.5 V 17 24 36 30
RCO
6 V 14 21 31 26
2 V 107 192 288 240
CLK Any Q
4.5 V 31 38 58 48
t
pd
CLK
Any Q
6 V 26 32 49 41
ns
t
pd
2 V 123 252 378 315
ns
MAX/MIN
4.5 V 39 50 76 63
MAX/MIN
6 V 32 43 65 54
2 V 102 228 342 285
RCO
4.5 V 29 46 68 57
D/U
RCO
6 V 24 38 59 49
D/U
2 V 86 192 288 240
MAX/MIN
4.5 V 24 38 58 48
MAX/MIN
6 V 20 32 49 41
2 V 50 132 198 165
CTEN RCO
4.5 V 15 26 40 33
CTEN
RCO
6 V 13 23 34 28
2 V 38 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 No load 50 pF