MOTOROLA CMOS LOGIC DATA

MC14583B

6

Figure 5. 3–State Switching Time Test Circuit and Waveforms

VOL′ and VOH′ refer to the levels present as a result of the 1 k ohm load resistors.

* Metal film,

± 1%, 1/4 W or greater

CL = 15 pF, which includes test circuit capacitance.

Test

Switch Position

ton HL

1

ton LH

2

toff HL

2

toff LH

1

PULSE

GENERATOR 1

PULSE

GENERATOR 2

VDD

VDD

VSS

Ain

DIS

Bin

Aout

Aout



Bout

Bout

CL

1 k*

1 k*

1

2

SW

Ain

Bin

3–STATE

DISABLE

Aout

Bout

VDD

VSS

VDD

VSS

VDD

VSS

VOH

VOL

VOH

VOL

50%

ton LH

toff LH

toff LH

10%

toff HL

VOL

ton LH

10%

90%

VOH′

VOH′

90%

VOH

toff LH

VOL′

10% (VOH – VOL′)

VOL′

10% (VOH – VOL′)

90%

90%

VOH

ton HL

VOH′

SWITCH POSITION 2

SWITCH POSITION 1