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SP3488CT Datasheet(PDF) 4 Page - Sipex Corporation |
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SP3488CT Datasheet(HTML) 4 Page - Sipex Corporation |
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4 / 9 page  10/16/02 SP3488/3489 Low Power Quad RS-485/422 Line Receivers © Copyright 2002 Sipex Corporation 4 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 — V CC — Positive Supply +3.00V < VCC < +3.60V SP3489 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 Receiver 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 SP3489 Truth Table (2). Pin 5 — RO 2 — Receiver 2 Output — If Receiver 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. DIFFERENTIAL ENABLES OUTPUT A – B EN EN RO V ID ≥ 0.2V H X H XL H –0.2V < V ID < +0.2V H X X XL X V ID ≤ 0.2V H X L XL L XL H Hi–Z Table 1. SP3488 Truth Table 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 SP3489 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 — V CC — Positive Supply +3.00V < VCC < +3.60V Table 2. SP3489 Truth Table DIFFERENTIAL ENABLES OUTPUT A – B EN1/EN2 or EN3/EN4 RO VID ≥ 0.2V H H –0.2V < VID < +0.2V H X VID ≤ 0.2V H L XL Hi–Z FEATURES... The SP3488 and the SP3489 are +3.3V low power quad line receivers that meet the specifications of the RS-485 and RS-422 serial protocols. These devices are pin-to-pin compatible with Sipex's SP488 and SP489 devices as well as popular industry standards. The SP3488 and SP3489 devices feature Sipex's BiCMOS process allowing low power operation without sacrificing performance. The RS-485 standard is ideal for multi-drop applications or for long distance interfaces. RS-485 allows up to 32 drivers and 32 receivers to be connected to a data bus, making it an ideal choice for multi-drop applications. Since the |
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