SP3070E Datasheet, PDF (10/20 Pages) Exar Corporation – ±15kV ESD-Protected, 3.3V, 1/8 Load, Failsafe RS-485/RS422 Transceivers

figure 5. driver enable & disable times test circuit & timing diagram
Y S1
0 or VCC ^DI D
Z
GENERATOR
50Ω
VCC
RL = 500Ω
OUT
CL = 50pF
DE
V_CC OUT
V_OL
t_ZL, t_ZL(SHDN
V_OM = (V_OL+ V_CC)/2
V_CC
V_CC /2
0
t_LZ
0.25V
figure 6. receiver propagation delay test circuit & timing diagram
A
VID _B R
RE
OUT
CL
15pF
A
B
OUT
1.5V
t _PHL
+1V
-1V
t_PLH
V_OH
V_OL
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com
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SP3070E-SP3078E_100_061109