SP26LV431 Datasheet, PDF (4/13 Pages) Sipex Corporation – High Speed, +3.3V Quad RS-422 Differential Line Driver

AC TEST CIRCUITS AND SWITCHING TIME WAVEFORMS
Generator
Driver
Enabled
DI_X
D
50Ω
Figure 2. AC Test Circuit
CL
CL RL ^D0XA
D0_XB
CL
DRIVER
INPUT DIX
DRIVER D0_XB
DRIVER D0_XA
f=1 MHz tR < 10ns, tF < 10ns
1.5V
tPLHD
0V (Differential)
1.5V
tPHLD
0V
DIFFERENTIAL
OUTPUT
0V
20%
80%
V_DIFF = V_A - V_B
tTLH
80%
0V
20%
tTHL
3V
GND
VOH
VOL
Figure 3. Propagation Delays
VCC _S1
D0_XA
S2
D0 B ^CL
X
ENABLE
ENABLE
If ENABLE is the selected input, then ENABLE = HIGH
If ENABLE is the selected input, then ENABLE = LOW
To force the driver outputs into high-Z, ENABLE = LOW
ENABLE = HIGH
Test
Point
S3
VCC
110Ω
ENABLE
1.5V
ENABLE
t_PHZ
Input = ENABLE or ENABLE
S1= VCC
S2 = D0_XA
S3 = GND
and/or
S1 = GND
S2 = D0_XB
t_PLZ
S3 = GND
V_OH = 0.3V
Input = ENABLE or ENABLE
S1= GND
S2 = D0_XB
S3 = VCC
and/or
S1 = VCC
S2 = D0_XA
S3 = VCC
V_OL+ 0.3V
1.5V
t_PZH
1.3V
t_PZL
1.3V
3V
0V
V_OH
GND
V_CC
V_OL
Figure 4. Driver Single-Ended TRI-STATE Test Circuit
Figure 5. Driver Single-Ended TRI-STATE Waveforms
3.0V
INPUT
0.0V
OUTPUT
(DIFFERENTIAL)
90%
10%
tTLH
Input pulse: f = 1MHz, 50%
tr < 6ns
tf < 6ns
90%
10%
tTHL
Figure 6. Differential Rise and Fall Times
Rev: A Date: 3/08/04
SP26LV431 High Speed, +3.3V Quad RS-422 Differential Line Driver
4
© Copyright 2004 Sipex Corporation