SN74AHCT74QQ1

DUAL POSITIVEEDGETRIGGERED DTYPE FLIPFLOP

WITH CLEAR AND PRESET

SGDS008B − MAY 1998 − REVISED APRIL 2008

3

POST OFFICE BOX 655303

−0.5 V to 7 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

−0.5 V to 7 V

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

−20 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

±20 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

±25 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

±50 mA

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

Package thermal impedance,

86

°C/W

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

PW package

113

°C/W

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

−65

°C to 150°C

. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

† Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device. These are stress ratings only, and

functional operation of the device at these or any other conditions beyond those indicated under “recommended operating conditions” is not

implied. Exposure to absolute-maximum-rated conditions for extended periods may affect device reliability.

NOTES:

1. The input and output voltage ratings may be exceeded if the input and output current ratings are observed.

2. The package thermal impedance is calculated in accordance with JESD 51-7.

recommended operating conditions (see Note 3)

MIN

MAX

UNIT

VCC

Supply voltage

4.5

5.5

V

VIH

High-level input voltage

2

V

VIL

Low-level input voltage

0.8

V

VI

Input voltage

0

5.5

V

VO

Output voltage

0

VCC

V

IOH

High-level output current

−8

mA

IOL

Low-level output current

8

mA

∆t/∆v

Input transition rise or fall rate

20

ns/V

TA

Operating free-air temperature

−40

125

°C

NOTE 3: All unused inputs of the device must be held at VCC 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 recommended operating free-air temperature range (unless

otherwise noted)

PARAMETER

TEST CONDITIONS

VCC

TA = 25°C

MIN

MAX

UNIT

PARAMETER

TEST CONDITIONS

VCC

MIN

TYP

MAX

MIN

MAX

UNIT

VOH

IOH = −50 mA

4.5 V

4.4

4.5

4.4

V

VOH

IOH = −8 mA

4.5 V

3.94

3.8

V

VOL

IOL = 50 mA

4.5 V

0.1

0.1

V

VOL

IOL = 8 mA

4.5 V

0.36

0.44

V

II

VI = 5.5 V or GND

0 V to 5.5 V

±0.1

±1

mA

ICC

VI = VCC or GND,

IO = 0

5.5 V

2

20

mA

∆ICC‡

One input at 3.4 V,

Other inputs at VCC or GND

5.5 V

1.35

1.5

mA

Ci

VI = VCC or GND

5 V

2

10

pF

‡ This is the increase in supply current for each input at one of the specified TTL voltage levels rather than 0 V or VCC.