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SP487EET Datasheet(PDF) 5 Page - Sipex Corporation |
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SP487EET Datasheet(HTML) 5 Page - Sipex Corporation |
5 / 11 page 5 SP486E/487EDS/06 SP486E/487E Enhanced Quad RS-485/RS-422 Line Drivers © Copyright 2000 Sipex Corporation Figure 4. Driver Propagation Delays 3V 0V B A VO –VO VO VO 1 2 tr tf 10% 90% 90% 10% VO 1 2 VDIFF = V(A) – V(B) F = 1MHZ: tr < 10ns: tf < 10ns tPLH tPHL DI 1.5V 1.5V AC PARAMETERS V CC = 5V±5%; typicals at 25°C; TAMB = 25°C unless otherwise noted. PARAMETER MIN. TYP. MAX. UNIT CONDITIONS PROPAGATION DELAY Driver Input to Output R DIFF = 54 Ohms, CL1= CL2= 100pF; Figure 2 Low to High (t PLH) 204060 ns High to Low (t PHL) 204060 ns Differential Skew (t SKEW) 5 15 ns t SKEW = t PLH - tPHL Driver Rise Time (t R) 10% to 90% SP486E 20 ns SP487E 20 ns Driver Fall Time (t F) 90% to 10% SP486E 20 ns SP487E 20 ns DRIVER ENABLE To Output High 60 110 ns C L = 100pF; Figures 3 and 5 (S 2 closed) To Output Low 60 115 ns C L = 100pF; Figures 3 and 5 (S 1 closed) DRIVER DISABLE From Output Low 60 130 ns C L = 15pF; Figures 3 and 5 (S 1 closed) From Output High 60 130 ns C L = 15pF; Figures 3 and 5 (S 2 closed) |
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