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SP489AET Datasheet(PDF) 5 Page - Sipex Corporation |
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SP489AET Datasheet(HTML) 5 Page - Sipex Corporation |
5 / 7 page SP488A/489ADS/07 SP488A/489A High Speed Quad RS-485/RS-422 Line Receivers © Copyright 2000 Sipex Corporation 5 SP489A PINOUT Pin 1 — RI 1B — Receiver 1 input B. Pin 2 — RI 1A — Receiver 1 input A. Pin 3 — RO 1 — Receiver 1 Output — If Re- ceiver 1 output is enabled, if RI 1A > RI1B by 200mV, Receiver output is high. If Receiver 1 output is enabled, and if RI 1A < RI1B by 200mV, Receiver 1 output is low. Pin 4 — EN1/EN2 — Receiver 1 and 2 Output Enable. Please refer to SP489A Truth Table (2). Pin 5 — RO 2 — Receiver 2 Output — If Re- ceiver 2 output is enabled, if RI 2A > RI2B by 200mV, Receiver 2 output is high. If Receiver 2 output is enabled, and if RI 2A < RI2B by 200mV, Receiver 2 output is low. Pin 6 — RI 2A — Receiver 2 input A. Pin 7 — RI 2B — Receiver 2 input B. Pin 8 — GND — Digital Ground. Pin 9 — RI 3B — Receiver 3 input B. Pin 10 — RI 3A — Receiver 3 input A. Pin 11 — RO 3 — Receiver 3 Output — If Receiver 3 output is enabled, if RI 3A > RI3B by 200mV, Receiver 3 output is high. If Receiver 3 output is enabled, and if RI 3A < RI3B by 200mV, Receiver 3 output is low. Pin 12 — EN3/EN4 — Receiver 3 and 4 Output Enable. Please refer to SP489A Truth Table (2). Pin 13 — RO 4 — Receiver 4 Output — If Receiver 4 output is enabled, if RI 4A > RI4B by 200mV, Receiver 4 output is high. If Receiver 4 output is enabled, and if RI 4A < RI4B by 200mV, Receiver 4 output is low. Pin 14 — RI 4A — Receiver 4 input A. Pin 15 — RI 4B — Receiver 4 input B. Pin 16 — Supply Voltage V CC — 4.75V ≤ VCC ≤ 5.25V. A B 54 Ω 50pF DI 1/4 SP486 1/4 SP488 50pF EN EN ROn DRIVER RCVR CL Figure 3. Timing Test Circuit S1 RCVR S2 VCC 1k Ω CL 1k Ω Figure 4. Enable/Disable Timing Test Circuit |
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