SP1486E Datasheet, PDF (8/15 Pages) Sipex Corporation – +5V, 20Mbps PROFIBUS RS485/RS422 Transceivers Advanced Failsafe, 1/8th Unit Load, ±15kV ESD-Protected

DI
D
VCC
DESCRIPTION
R/2
VOD
A
VID _{B R}
OUT
R/2 _VOC
RE
Driver DC Test Circuit
Receiver DC Test Circuit
A
DI _D
VOD
B
3.3V
R_L
C_L
54Ω 50pF
Driver Propagation Delay Time Test Circuit and Timing Diagram
Vcc
DI
0V
A
B
V_DIFF
V_A – V_B
V_O⁺
0V
V_O^–
Vcc/2
V_O ^1/2VO
t_PLH
t_PHL
Vcc/2
1/2V_O
90%
10%
t_R
t _SKEW = |t _PLH - t _PHL |
90%
10%
t_F
Exar Corporation 48720 Kato Road, Fremont CA, 94538 • 510-668-7017 • www.exar.com
8
SP1486E_100_061009