Datasheet
SCHS275E − MARCH 2002 − REVISED OCTOBER 2003
12
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
’HC190, ’HC191
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
V
CC
T
A
= 25°C
T
A
= −55°C
TO 125°C
T
A
= −40°C
TO 85°C
UNIT
PARAMETER
TEST CONDITIONS
V
CC
MIN MAX MIN MAX MIN MAX
UNIT
2 V 1.9 1.9 1.9
I
OH
= −20 µA
4.5 V 4.4 4.4 4.4
V
OH
V
I
= V
IH
or V
IL
I
OH
= −20 µA
6 V 5.9 5.9 5.9
V
V
OH
V
I
= V
IH
or V
IL
I
OH
= −4 mA 4.5 V 3.98 3.7 3.84
V
I
OH
= −5.2 mA 6 V 5.48 5.2 5.34
2 V 0.1 0.1 0.1
I
OL
= 20 µA
4.5 V 0.1 0.1 0.1
V
OL
V
I
= V
IH
or V
IL
I
OL
= 20 µA
6 V 0.1 0.1 0.1
V
V
OL
V
I
= V
IH
or V
IL
I
OL
= 4 mA 4.5 V 0.26 0.4 0.33
V
I
OL
= 5.2 mA 6 V 0.26 0.4 0.33
I
I
V
I
= V
CC
or 0 6 V ±0.1 ±1 ±1 µA
I
CC
V
I
= V
CC
or 0, I
O
= 0 6 V 8 160 80 µA
C
i
10 10 10 pF
’HCT191
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
V
CC
T
A
= 25°C
T
A
= −55°C
TO 125°C
T
A
= −40°C
TO 85°C
UNIT
PARAMETER
TEST CONDITIONS
V
CC
MIN TYP MAX MIN MAX MIN MAX
UNIT
V
OH
V
I
= V
IH
or V
IL
I
OH
= −20 µA
4.5 V
4.4 4.4 4.4
V
V
OH
V
I
= V
IH
or V
IL
I
OH
= −4 mA
4.5 V
3.98 3.7 3.84
V
V
OL
V
I
= V
IH
or V
IL
I
OL
= 20 µA
4.5 V
0.1 0.1 0.1
V
V
OL
V
I
= V
IH
or V
IL
I
OL
= 4 mA
4.5 V
0.26 0.4 0.33
V
I
I
V
I
= V
CC
to GND 5.5 V ±0.1 ±1 ±1 µA
I
CC
V
I
= V
CC
or 0, I
O
= 0 5.5 V 8 160 80 µA
∆I
CC
†
One input at V
CC
− 2.1 V,
Other inputs at 0 or V
CC
4.5 V to 5.5 V 100 360 490 450 µA
C
i
10 10 10 pF
†
Additional quiescent supply current per input pin, TTL inputs high, 1 unit load
HCT INPUT LOADING TABLE
INPUTS
UNIT LOADS
A-D 0.4
CLK 1.5
LOAD 1.5
D/U 1.2
CTEN 1.5
Unit load is nI
CC
limit specified in electrical
characteristics table, (e.g., 360 µA max at 25°C).