Datasheet
SCLS136D − DECEMBER 1982 − REVISED AUGUST 2003
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
electrical characteristics over recommended operating free-air temperature range (unless otherwise
noted)
PARAMETER
TEST CONDITIONS
V
CC
T
A
= 25°C SN54HC273 SN74HC273
UNIT
PARAMETER
TEST CONDITIONS
V
CC
MIN TYP MAX MIN MAX MIN MAX
UNIT
2 V 1.9 1.998 1.9 1.9
I
OH
= −20 µA
4.5 V 4.4 4.499 4.4 4.4
V
OH
V
I
= V
IH
or V
IL
I
OH
= −20 µA
6 V 5.9 5.999 5.9 5.9
V
V
OH
V
I
= V
IH
or V
IL
I
OH
= −4 mA 4.5 V 3.98 4.3 3.7 3.84
V
I
OH
= −5.2 mA 6 V 5.48 5.8 5.2 5.34
2 V 0.002 0.1 0.1 0.1
I
OL
= 20 µA
4.5 V 0.001 0.1 0.1 0.1
V
OL
V
I
= V
IH
or V
IL
I
OL
= 20 µA
6 V 0.001 0.1 0.1 0.1
V
V
OL
V
I
= V
IH
or V
IL
I
OL
= 4 mA 4.5 V 0.17 0.26 0.4 0.33
V
I
OL
= 5.2 mA 6 V 0.15 0.26 0.4 0.33
I
I
V
I
= V
CC
or 0 6 V ±0.1 ±100 ±1000 ±1000 nA
I
CC
V
I
= V
CC
or 0, I
O
= 0 6 V 8 160 80 µA
C
i
2 V to 6 V 3 10 10 10 pF
timing requirements over recommended operating free-air temperature range (unless otherwise
noted)
V
CC
T
A
= 25°C SN54HC273 SN74HC273
UNIT
V
CC
MIN MAX MIN MAX MIN MAX
UNIT
2 V 5 4 4
f
clock
Clock frequency
4.5 V
27 18 21
MHz
f
clock
Clock frequency
6 V 32 21 25
MHz
2 V 80 120 100
CLR low
4.5 V 16 24 20
t
w
Pulse duration
CLR low
6 V 14 20 17
ns
t
w
Pulse duration
2 V 80 120 100
ns
CLK high or low
4.5 V 16 24 20
CLK high or low
6 V 14 20 17
2 V 100 150 125
Data
4.5 V 20 30 25
t
su
Setup time before CLK↑
Data
6 V 17 25 21
ns
t
su
Setup time before CLK↑
2 V 100 150 125
ns
CLR inactive
4.5 V 20 30 25
CLR inactive
6 V 17 25 21
2 V 0 0 0
t
h
Hold time, data after CLK↑
4.5 V
0 0 0
ns
t
h
Hold time, data after CLK
6 V 0 0 0
ns