Datasheet
SN54AHCT74
SN74AHCT74
www.ti.com
SCLS263O –OCTOBER 1995–REVISED JUNE 2013
RECOMMENDED OPERATING CONDITIONS
(1)
SN54AHCT74 SN74AHCT74
UNIT
MIN MAX MIN MAX
V
CC
Supply voltage 4.5 5.5 4.5 5.5 V
V
IH
High-level input voltage 2 2 V
V
IL
Low-level Input voltage 0.8 0.8 V
V
I
Input voltage 0 5.5 0 5.5 V
V
O
Output voltage 0 V
CC
0 V
CC
V
I
OH
High-level output current –8 –8 mA
I
OL
Low-level output current 8 8 mA
Δt/Δv Input Transition rise or fall rate 20 20 ns/V
T
A
Operating free-air temperature –55 125 –40 125 °C
(1) 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.
ELECTRICAL CHARACTERISTICS
over operating free-air temperature range (unless otherwise noted)
T
A
= –40°C TO
T
A
= –55°C TO T
A
= –40°C TO
125°C
125°C 85°C
T
A
= 25°C
Recommended
PARAMETER TEST CONDITIONS V
CC
UNIT
SN54AHCT74 SN74AHCT74 SN74AHCT74
MIN TYP MAX MIN MAX MIN MAX MIN MAX
I
OH
= –50 µA 4.4 4.5 4.4 4.4 4.4
V
OH
4.5 V V
I
OH
= –8 mA 3.94 3.8 3.8 3.8
I
OL
= 50 µA 0.1 0.1 0.1 0.1
V
OL
4.5 V V
I
OH
= 8 mA 0.36 0.44 0.44 0.44
0 V to 5.5
I
I
V
I
= 5.5 V or GND ±0.1 ±1
(1)
±1 ±1 µA
V
V
I
= V
CC
or
I
CC
I
O
= 0 5.5 V 2 20 20 20 µA
GND,
One input at 3.4 V,
ΔI
CC
Other inputs at V
CC
or 5.5 V 1.35 1.5 1.5 1.5 mA
GND
C
i
V
I
= V
CC
or GND 5 V 2 10 10 pF
(1) On products compliant to MIL-PRF-38535, this parameter is not production tested at VCC = 0 V.
TIMING REQUIREMENTS
over recommended operating free-air temperature range, V
CC
= 5 V ± 0.5 V (unless otherwise noted) (see Figure 1)
T
A
= –40°C TO
T
A
= –55°C TO T
A
= –40°C TO
125°C
125°C 85°C
T
A
= 25°C
Recommended
PARAMETER UNIT
SN54AHCT74 SN54AHCT74 SN54AHCT74
TYP MAX MIN MAX MIN MAX MIN MAX
PRE or CLR low 5 5 5 5
t
w
Pulse duration ns
CLK 5 5 5 5
Data 5 5 5 5
t
su
Setup time before CLK↑ ns
PRE or CLR
3.5 3.5 3.5 3.5
inactive
t
h
Hold time, data after CLK↑ 0 0 0 0 ns
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