SP431 datasheet(5/15 Pages) SIPEX

5 / 15 page

SP431DS/08

SP431 High Speed, +3.3V Quad RS-422 Differential Line Driver

Figure 4. Driver Single-Ended TRI-STATE Test Circuit

Figure 5. Driver Single-Ended TRI-STATE Waveforms

Figure 2. AC Test Circuit

Figure 3. Propagation Delays

AC TEST CIRCUITS AND SWITCHING TIME WAVEFORMS

Generator

Driver

Enabled

Ω

Figure 6. Differential Rise and Fall Times

tTLH

tTHL

3.0V

0.0V

INPUT

OUTPUT

(DIFFERENTIAL)

10%

90%

10%

Input pulse: f = 1MHz, 50%

tr < 6ns

tf < 6ns

f=1 MHz tR < 10ns, tF < 10ns

1.5V

tPLHD

tPHLD

DRIVER

INPUT DIX

DIFFERENTIAL

OUTPUT

20%

tTLH

tTHL

80%

DIFF = VA - VB

0V (Differential)

GND

VOH

VOL

DRIVER D0

VCC

ENABLE

110

Ω

Test

Point

VCC

If ENABLE is the input, then ENABLE = HIGH

If ENABLE is the input, then ENABLE = LOW

ENABLE

1.5V

PHZ

PLZ

OL+ 0.3V

PZH

1.3V

GND

PZL

1.3V

Input = ENABLE or ENABLE

S1= VCC

S2 = D0

S3 = GND

and/or

S1 = GND

S2 = D0

S3 = GND

Input = ENABLE or ENABLE

S1= GND

S2 = D0

S3 = VCC

and/or

S1 = VCC

S2 = D0

S3 = VCC

OH = 0.3V

ENABLE

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