MC75172B Datasheet, PDF (4/12 Pages) ON Semiconductor – QUAD EIA-485 LINE DRIVERS

MC75172B MC75174B
Figure 1. VDD Measurement
VCC
Vin
(0.8 or 2.0 V)
VOD2,A
RL/2
RL/2 _VOS
VCC
Vin
(0.8 or 2.0 V)
Figure 2. Common Mode Test
VOD3
375
58
375
+
VCM = 12 to –7.0 V
VCC
Y
Vin
Z
S.G.
Figure 3. Propagation Delay, Single–Ended Outputs
2.3 V
27 Ω
Output
15 pF
Vin ^{1.5 V}
tPLH
Output Y
3.0 V
Output Z
tPHL ^{3.0 V}
3.0 V
1.5 V
0V
tPHL
3.0 V
VOL
tPLH
VOH
3.0 V
Figure 4. Propagation Delay, Differential Outputs
VCC
Vin
54
50 pF ^VOD
Vin
1.5 V
tPLHD
S.G.
1.5 V
VOD
50%
[4.6 V
– 1.5 V
tdr
p p NOTES: 1. S.G. set to: f 1.0 MHz; duty cycle = 50%; tr, tf, 5.0 ns.
2. tSK1 =  tPLHD – tPHLD for each driver.
3. tSK2 computed by subtracting the shortest tPLHD from the longest tPLHD of the 4 drivers within a package.
4. tSK3 computed by subtracting the shortest tPHLD from the longest tPHLD of the 4 drivers within a package.
3.0 V
1.5 V
0V
tPHLD
1.5 V
50%
– 1.5 V
tdf
4
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