MC34C86

MOTOROLA

3

Parameter

Symbol

Min

Typ

Max

Unit

Propagation Delay Input to Output, CL = 50 pF, VDIFF = 2.5 V

tPLH

tPHL

—

18

30

ns

Skew =

 tPHL – tPLH 

Skew

—

1

—

ns

Propagation Delay Enable to Output

CL = 50 pF, RL = 1000 Ω, VDIFF = 2.5 V

tPLZ

tPHZ

—

12

—

ns

Propagation Delay Enable to Output

CL = 50 pF, RL = 1000 Ω, VDIFF = 2.5 V

tPZL

tPZH

—

14

—

ns

AC TEST CIRCUIT AND SWITCHING TIME WAVEFORMS

Figure 1. Test Circuit

4.9 k

Ω

S1

VCC

OUTPUT

S2

CL = 49 pF

RL = 2 kΩ

TEST

POINT

OUTPUT

0 V

tPHL

Figure 2. Propagation Delays

1.3 V

1.3 V

0 V

INPUT

tPLH

+ 2.5 V

—

– 2.5 V

S1 AND S2 CLOSED

Figure 3. Enable and Disable Times

OUTPUT A

1.3 V

tPHZ

OUTPUT B

50%

1.3 V

ENABLE INPUT

50%

VOL

VOH

tPZH

tPLZ

tPZL

3 V —

0 V

S1 OPEN

S2 CLOSED

S1 CLOSED

S2 CLOSED

S1 CLOSED

S2 OPEN

S1 CLOSED

S2 CLOSED

0.5 V

0.5 V

TYPICAL APPLICATIONS

Figure 4. Two–Wire Balanced Systems (EIA–422–A)

+

–

DATA

DATA

OUTPUT

ENABLE