SN54ALS174, SN54ALS175, SN54AS174, SN54AS175B

SN74ALS174, SN74ALS175, SN74AS174, SN74AS175B

HEX/QUADRUPLE D-TYPE FLIP-FLOPS WITH CLEAR

SDAS207E - APRIL 1982 - REVISED MAY 2002

3

POST OFFICE BOX 655303

logic diagrams (positive logic)

1D

C1

R

To Five Other Channels

1

9

3

2

CLR

CLK

1D

1Q

1Q

1

9

C1

1D

CLK

CLR

1D

R

1Q

To Three Other Channels

4

2

3

’ALS174, ’AS174

’ALS175, ’AS175B

Pin numbers shown are for the D, J, N, NS, and W packages.

absolute maximum ratings over operating free-air temperature range, SN54/74ALS174,

7 V

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

7 V

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

Package thermal impedance,

73

°C/W

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

N package

67

°C/W

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

NS package

64

°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.

NOTE 1: The package thermal impedance is calculated in accordance with JESD 51-7.

recommended operating conditions (see Note 2)

SN54ALS174

SN54ALS175

SN74ALS174

SN74ALS175

UNIT

MIN

NOM

MAX

MIN

NOM

MAX

VCC

Supply voltage

4.5

5

5.5

4.5

5

5.5

V

VIH

High-level input voltage

2

2

V

VIL

Low-level input voltage

0.8

0.8

V

IOH

High-level output current

–0.4

–0.4

mA

IOL

Low-level output current

4

8

mA

TA

Operating free-air temperature

–55

125

0

70

°C

NOTE 2: 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.