Datasheet
SCLS117D − DECEMBER 1982 − REVISED SEPTEMBER 2003
4
POST OFFICE BOX 655303 • DALLAS, TEXAS 75265
recommended operating conditions (see Note 3)
SN54HC166 SN74HC166
UNIT
MIN NOM MAX MIN NOM MAX
UNIT
V
CC
Supply voltage 2 5 6 2 5 6 V
V
CC
= 2 V 1.5 1.5
V
IH
High-level input voltage
V
CC
= 4.5 V
3.15 3.15
V
V
IH
High-level input voltage
V
CC
= 6 V 4.2 4.2
V
V
CC
= 2 V 0.5 0.5
V
IL
Low-level input voltage
V
CC
= 4.5 V
1.35 1.35
V
V
IL
Low-level input voltage
V
CC
= 6 V 1.8 1.8
V
V
I
Input voltage 0 V
CC
0 V
CC
V
V
O
Output voltage 0 V
CC
0 V
CC
V
V
CC
= 2 V 1000 1000
∆t/∆v
†
Input transition rise/fall time
V
CC
= 4.5 V
500 500
ns
∆t/∆v
†
Input transition rise/fall time
V
CC
= 6 V 400 400
ns
T
A
Operating free-air temperature −55 125 −40 85 °C
NOTE 3: All unused inputs of the device must be held at V
CC
or GND to ensure proper device operation. Refer to the TI application report,
Implications of Slow or Floating CMOS Inputs, literature number SCBA004.
†
If this device is used in the threshold region (from V
IL
max = 0.5 V to V
IH
min = 1.5 V), there is a potential to go into the wrong state from induced
grounding, causing double clocking. Operating with the inputs at t
t
= 1000 ns and V
CC
= 2 V does not damage the device; however, functionally,
the CLK inputs are not ensured while in the shift, count, or toggle operating modes.
electrical characteristics over recommended operating free-air temperature range (unless
otherwise noted)
PARAMETER
TEST CONDITIONS
V
CC
T
A
= 25°C SN54HC166 SN74HC166
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