CD54HC190, CD74HC190

CD54HC191, CD74HC191, CD54HCT191, CD74HCT191

SYNCHRONOUS UP/DOWN COUNTERS WITH DOWN/UP MODE CONTROL

SCHS275E − MARCH 2002 − REVISED OCTOBER 2003

11

POST OFFICE BOX 655303

• DALLAS, TEXAS 75265

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

Supply voltage range, VCC

−0.5 V to 7 V

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

Input clamp current, IIK (VI < 0 or VI > VCC) (see Note 1)

±20 mA

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

Output clamp current, IOK (VO < 0 or VO > VCC) (see Note 1)

±20 mA

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

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

±35 mA

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

Continuous output source or sink current per output, IO (VO = 0 to VCC)

±25 mA

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

Continuous current through VCC or GND

±50 mA

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

Package thermal impedance,

θJA (see Note 2): E package

67

°C/W

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

M package

73

°C/W

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

NS package

64

°C/W

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

PW package

108

°C/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 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 for ’HC190 and ’HC191 (see Note 3)

TA = 25°C

TA = −55°C

TO 125

°C

TA = −40°C

TO 85

°C

UNIT

MIN

MAX

MIN

MAX

MIN

MAX

UNIT

VCC

Supply voltage

2

6

2

6

2

6

V

VCC = 2 V

1.5

1.5

1.5

VIH

High-level input voltage

VCC = 4.5 V

3.15

3.15

3.15

V

VIH

High-level input voltage

VCC = 6 V

4.2

4.2

4.2

V

VCC = 2 V

0.5

0.5

0.5

VIL

Low-level input voltage

VCC = 4.5 V

1.35

1.35

1.35

V

VIL

Low-level input voltage

VCC = 6 V

1.8

1.8

1.8

V

VI

Input voltage

0

VCC

0

VCC

0

VCC

V

VO

Output voltage

0

VCC

0

VCC

0

VCC

V

VCC = 2 V

1000

1000

1000

tt

Input transition (rise and fall) time

VCC = 4.5 V

500

500

500

ns

tt

Input transition (rise and fall) time

VCC = 6 V

400

400

400

ns

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.

recommended operating conditions for ’HCT191 (see Note 4)

TA = 25°C

TA = −55°C

TO 125

°C

TA = −40°C

TO 85

°C

UNIT

MIN

MAX

MIN

MAX

MIN

MAX

UNIT

VCC

Supply voltage

4.5

5.5

4.5

5.5

4.5

5.5

V

VIH

High-level input voltage

2

2

2

V

VIL

Low-level input voltage

0.8

0.8

0.8

V

VI

Input voltage

VCC

VCC

VCC

V

VO

Output voltage

VCC

VCC

VCC

V

tt

Input transition (rise and fall) time

500

500

500

ns

NOTE 4: 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.