SN74LVC74 datasheet(2/6 Pages) TI

2 / 6 page

SN74LVC74

DUAL POSITIVE-EDGE-TRIGGERED D-TYPE FLIP-FLOP

WITH CLEAR AND PRESET

SCAS287B – JANUARY 1993 – REVISED JULY 1995

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

logic symbol†

1CLK

2CLK

1PRE

2PRE

1CLR

2CLR

† This symbol is in accordance with ANSI/IEEE Std 91-1984 and IEC Publication 617-12.

logic diagram, each flip-flop (positive logic)

PRE

CLK

CLR

absolute maximum ratings over operating free-air temperature range (unless otherwise noted)‡

Supply voltage range, VCC

– 0.5 V to 6.5 V

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

Input voltage range, VI (see Note 1)

– 0.5 V to 6.5 V

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

Output voltage range, VO (see Notes 1 and 2)

– 0.5 V to VCC + 0.5 V

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

Input clamp current, IIK (VI < 0)

– 50 mA

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

Output clamp current, IOK (VO < 0 or VO > VCC)

±50 mA

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

Continuous output current, IO (VO = 0 to VCC)

±50 mA

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

Continuous current through VCC or GND

±100 mA

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

Maximum power dissipation at TA = 55°C (in still air) (see Note 3): D package

1.25 W

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

DB or PW package

0.5 W

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

Storage temperature range, Tstg

–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 negative-voltage ratings may be exceeded if the input and output clamp-current ratings are observed.

2. This value is limited to 4.6 V maximum.

3. The maximum package power dissipation is calculated using a junction temperature of 150

°C and a board trace length of 750 mils.

For more information, refer to the

Package Thermal Considerations application note in the 1994 ABT Advanced BiCMOS Technology

Data Book, literature number SCBD002B.

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