MAX491CSD

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MAX491CSD

IC TRANSCEIVER FULL 1/1 14SOIC

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Spécifications

Supplier Rochester Electronics, LLC,Analog Devices Inc./Maxim Integrated
Package Tube,Tube
ProductStatus Obsolete
Type Transceiver
Protocol RS422, RS485
NumberofDrivers/Receivers 1/1
Duplex Full
ReceiverHysteresis 70 mV
DataRate 2.5Mbps
Voltage-Supply 4.75V ~ 5.25V
OperatingTemperature 0°C ~ 70°C
MountingType Surface Mount
Package/Case 14-SOIC (0.154, 3.90mm Width)

Vue d'ensemble

Description

Introduction to MAX491CSD
- The MAX491CSD is a Maxim/Analog Devices RS-485/RS-422 transceiver. It combines a differential line driver and a differential line receiver in one device for robust serial communication over multi-point networks.
- It operates from a single supply across a wide voltage range and supports standard RS-485/RS-422 signaling.
- The device provides direction control via the DE (driver enable) pin and a receiver enable (RE) pin to tri-state the receiver as needed.
- It includes fail-safe logic so RO is a valid logic level (typically high) when the bus is idle, open, or shorted.
- The CSD suffix indicates a specific package/revision of the part.
- Typical applications: industrial automation, building automation, data acquisition, and any long-distance or multi-drop serial links.
- For exact electrical specs (Vcc range, data rate, propagation delay, pinout, ESD protection), consult the MAX491CSD datasheet. I can help with a quick pinout summary if you’d like.

Features

Key features of MAX491CSD (RS-485/RS-422 transceiver):
- Half‑duplex RS‑485/RS‑422 transceiver
- 5V single‑supply operation; industrial temperature range (-40°C to +85°C)
- Up to 2.5 Mbps data rate
- 1/8 unit‑load receiver; supports up to 32 devices on the bus
- Fail‑safe receiver: RO outputs high when bus is idle, open, or shorted
- Separate DI, RO, DE and /RE pins (DE enables driver; /RE enables receiver)
- Low power consumption
- 8‑pin package (CSD), with A, B bus pins and TTL/CMOS input thresholds
- Bus‑transient protection and ESD protection on A/B lines
Note: Verify exact specs in the datasheet for your manufacturing lot, as there can be small variant differences.

Package

MAX491CSD comes in an 8-pin SOIC (small-outline) surface-mount package.

Pinout

Pin count: 8 pins (SOIC-8/DIP-8).
Function: RS-485/RS-422 transceiver (half‑duplex). Pins include DI (data in), RO (data out), DE (driver enable), /RE (receiver enable), A and B (differential bus), Vcc, and GND.

Manufacturer

Manufacturer: Maxim Integrated (now part of Analog Devices).
What kind of company: A global semiconductor company that designs and markets analog and mixed-signal integrated circuits; historically fabless (outsourcing fabrication) and now part of Analog Devices.

Application

MAX491CSD is a low-power RS-485/RS-422 differential transceiver with multipoint capability. Typical applications include industrial automation and control (PLCs, motor controllers), process/building automation, data acquisition and telemetry, instrumentation and sensor networks, and any long-distance, noise-prone differential-bus communications.

Equivalent

MAX491CSD is a 5V RS-485/RS-422 transceiver. Direct equivalents from major vendors include: Maxim MAX485; TI SN65HVD178 (and SN65HVD177); ST SP485/SP487; Analog Devices ADM485; Onsemi MC485. Always verify pinout, data rate, and feature compatibility before substituting.

Expédition

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Référence des frais d'expédition (DHL/FedEx):

DHL: Les frais d'expédition vont de 25 à 45 $ (0,5 kg), avec un délai de livraison estimé de 2 à 5 jours ouvrables.

FedEx: Les frais d'expédition varient de 25 à 40 $ (0,5 kg), avec un délai de livraison estimé de 3 à 7 jours ouvrables.

UPS: Les frais d'expédition vont de 25 à 45 $ (0,5 kg), avec un délai de livraison estimé de 3 à 7 jours ouvrables.

TNT: Les frais d'expédition varient de 25 à 65 $ (0,5 kg), avec un délai de livraison estimé de 3 à 7 jours ouvrables.

EMS: Les frais d'expédition varient de 30 à 50 $ (0,5 kg), avec un délai de livraison estimé de 7 à 15 jours ouvrables.

Courrier aérien enregistré: Le coût d'expédition est de 2 à 4 $ (0,1 kg), avec un délai de livraison estimé de 5 à 20 jours ouvrables.

Paiements

Payment Methods

Le terme de paiement est 100% prépayé.

Actuellement, nous n'acceptons que les méthodes de paiement ci-dessous:

1. PayPal

2. Carte de crédit/débit

3. Transfert bancaire

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