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MM74HC161 • MM74HC163
AC Electrical Characteristics
V
CC
= 5V, T
A
= 25°C, C
L
= 15 pF, t
r
= t
f
= 6 ns
AC Electrical Characteristics
C
L
= 50 pF, t
r
= t
f
= 6 ns (unless otherwise specified)
Symbol Parameter Conditions Typ Guaranteed Limit Units
f
MAX
Maximum Operating Frequency 43 30 MHz
t
PHL
, t
PLH
Maximum Propagation Delay, Clock to RC 30 35 ns
t
PHL
, t
PLH
Maximum Propagation Delay, Clock to Q 29 34 ns
t
PHL
, t
PLH
Maximum Propagation Delay, ENT to RC 18 32 ns
t
PHL
Maximum Propagation Delay, Clear to Q or RC 27 38 ns
t
REM
Minimum Removal Time, Clear to Clock 10 20 ns
t
S
Minimum Set Up Time Clear, Load, 30 ns
Enable or Data to Clock
t
H
Minimum Hold Time, Data from Clock 5 ns
t
W
Minimum Pulse Width Clock, 16 ns
Clear, or Load
Symbol Parameter Conditions
V
CC
T
A
= 25°CT
A
= −40 to 85°CT
A
= −55 to 125°C
Units
Typ Guaranteed Limits
f
MAX
Maximum Operating 2.0V 10 5 4 4
MHzFrequency 4.5V 40 27 21 18
6.0V 45 32 25 21
t
PHL
Maximum Propagation 2.0V 100 215 271 320
nsDelay, Clock to RC 4.5V 32 43 54 64
6.0V 28 37 46 54
t
PLH
Maximum Propagation 2.0V 88 175 220 260
nsDelay, Clock to RC 4.5V 18 35 44 52
6.0V 15 30 37 44
t
PHL
Maximum Propagation 2.0V 95 205 258 305
nsDelay, Clock to Q 4.5V 30 41 52 61
6.0V 26 35 44 52
t
PLH
Maximum Propagation 2.0V 85 170 214 253
nsDelay, Clock to Q 4.5V 17 34 43 51
6.0V 14 29 36 43
t
PHL
Maximum Propagation 2.0V 90 195 246 291
nsDelay, ENT to RC 4.5V 28 39 49 58
6.0V 24 33 42 49
t
PLH
Maximum Propagation 2.0V 80 160 202 238
nsDelay, ENT to RC 4.5V 16 32 40 48
6.0V 14 27 34 41
t
PHL
Maximum Propagation 2.0V 100 220 275 325
nsDelay, Clear to RC 4.5V 32 44 55 66
6.0V 28 37 47 55
t
PHL
Maximum Propagation 2.0V 100 210 260 315
nsDelay, Clear to Q 4.5V 32 42 52 63
6.0V 28 36 45 54
t
REM
Minimum Removal 2.0V 125 158 186
nsTime Clear to Clock 4.5V 25 32 37
6.0V 21 27 32
t
S
Minimum Setup 2.0V 150 190 225
nsTime Clear or Data 4.5V 30 38 45
to Clock 6.0V 26 32 38
t
S
Minimum Setup 2.0V 135 170 200
nsTime Load 4.5V 27 34 41
to Clock 6.0V 23 29 35
