MOTOROLA CMOS LOGIC DATA

5

MC14506UB

Figure 6. Switching Time Test Circuit and Waveforms

(Data Inputs)

16

VSS

8

ZA

ZB

INH

AA

BA

CA

DA

EA

AB

BB

CB

DB

EB

DIS

PULSE

GENERATOR

CL

VDD

CL

20 ns

20 ns

VDD

VSS

VOH

VOL

OUTPUT

INPUT

90%

50%

10%

tPHL

tPLH

50%

90%

10%

tTHL

tTLH

VDD

Vout

VDD

16

ZA

ZB

INH

AA

BA

CA

DA

EA

AB

BB

CB

DB

EB

DIS

VSS

8

PULSE

GENERATOR

B

A

CL

1 k

A

B

S2

20 ns

20 ns

DISABLE

INPUT

90%

50%

10%

tPLZ

tPZL

VOH

VOL

10%

tPZH

tPHZ

90%

10%

90%

OUTPUT

≈ 2.5 V @ VDD = 5 V,

10 V AND 15 V

≈ 2 V @ VDD = 5 V

≈ 6 V @ VDD = 10 V

≈ 10 V @ VDD = 15 V

S1

* To test other side of circuit connect to this output and

change switch (S1) to other expand input (E).

SWITCH POSITIONS

TEST

S1

S2

tPLZ

A

A

tPHZ

B

B

tPZL

A

A

tPZH

B

B

Figure 7. Switching Time Test Circuit and Waveforms

(For 3–State Output)