CY74FCT191T

4-BIT UP/DOWN BINARY COUNTER

SCCS016A – MAY 1994 – REVISED SEPTEMBER 2001

4

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

absolute maximum rating over operating free-air temperature range (unless otherwise noted)†

Supply voltage range to ground potential

–0.5 V to 7 V

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

DC input voltage range

–0.5 V to 7 V

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

DC output voltage range

–0.5 V to 7 V

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

DC output current (maximum sink current/pin)

120 mA

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

Package thermal impedance,

qJA (see Note 1): Q package

90

°C/W

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

SO package

57

°C/W

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

Ambient temperature range with power applied, TA

–65

_C to 135_C

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

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.

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

recommended operating conditions (see Note 2)

MIN

NOM

MAX

UNIT

VCC

Supply voltage

4.75

5

5.25

V

VIH

High-level input voltage

2

V

VIL

Low-level input voltage

0.8

V

IOH

High-level output current

– 32

mA

IOL

Low-level output current

64

mA

TA

Operating free-air temperature

–40

85

°C

NOTE 2: All unused inputs of the device must be held at VCC or GND to ensure proper device operation.