MC74HC03A

http://onsemi.com

4

Figure 1. Switching Waveforms

CL*

*Includes all probe and jig capacitance

TEST

POINT

DEVICE

UNDER

TEST

OUTPUT

Figure 2. Test Circuit

1k

Ω

Rpd

VCC

INPUT A

90%

50%

10%

tf

tr

GND

VCC

OUTPUT Y

tPZL

tTHL

HIGH

IMPEDANCE

VOL

10%

tPLZ

90%

50%

10%

VO, OUTPUT VOLTAGE (VOLTS)

012345

0

5

10

15

20

25

Figure 3. Open–Drain Output Characteristics

A1

B1

A2

B2

An

Bn

1/4

HC03

1/4

HC03

1/4

HC03

Y1

Y2

Yn

TYPICAL

T=25

°C

T=25

°C

T=85

°C

T=125

°C

EXPECTED MINIMUM*

VCC=5V

*The expected minimum curves are not guarantees, but are design aids.

VCC

PULLUP

RESISTOR

OUTPUT

OUTPUT = Y1

• Y2 • . . . • Yn

= A1B1

• A2B2 • . . . • AnBn

Figure 4. Wired AND

LED1

1/4

HC03

LED2

LED

ENABLE

VCC

+

VR

–

+

VF

–

1/4

HC03

VCC

DESIGN EXAMPLE

CONDITIONS: ID^10mA

USING FIGURE NO TAG TYPICAL

CURVE, at ID=10mA, VDS^0.4V

NR +

VCC * VF * VO

ID

+ 5V * 1.7V * 0.4V

10mA

USE R = 270

Ω

+ 290W

Figure 5. LED Driver With Blanking