MAX487ECSA

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MAX487ECSA

IC TRANSCEIVER HALF 1/1 8SOIC

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規格

Package Tube
ProductStatus Obsolete
Type Transceiver
Protocol RS422, RS485
NumberofDrivers/Receivers 1/1
Duplex Half
ReceiverHysteresis 70 mV
DataRate 250kbps
Voltage-Supply 4.75V ~ 5.25V
OperatingTemperature 0°C ~ 70°C
MountingType Surface Mount
Package/Case 8-SOIC (0.154, 3.90mm Width)

概述

Description

MAX487ECSA is an 8‑pin RS‑485/RS‑422 transceiver from Maxim (now Analog Devices). It provides a half‑duplex differential driver and receiver in one device, with DI data input, RO data output, DE to enable the driver, and RE# to enable the receiver.
Key points:
- Bus: A and B differential interface; supports RS‑485/RS‑422 signaling.
- 1/8 unit‑load on the bus, suitable for multi‑node networks.
- Low power, single‑supply operation (typical variant runs from a 4.75–5.25 V rail; check datasheet for exact range).
- Failsafe receiver so RO stays high when the bus is idle/open/shorted.
- Robust protection and industry‑standard 8‑pin package; ECSA suffix indicates a specific packaging/temperature variant (check the datasheet for exact details).
Common uses: industrial automation, building/energy management, instrumentation, and any cast‑in RS‑485 network.
Note: Refer to the MAX487ECSA datasheet for exact voltage, temperature range, pinout, and electrical specs for your particular variant.

Features

Key features of MAX487ECSA (RS-485/RS-422 transceiver):
- Half‑duplex RS-485/RS-422 transceiver
- 5V operation with 1/8 unit-load on the bus (multi-drop capable)
- Separate driver enable (DE) and receiver enable (RE) controls
- Fail‑safe receiver: RO goes high when inputs are open, idle, or shorted
- Differential A/B bus pins with tri‑state outputs
- TTL/CMOS-compatible DI/RO inputs and outputs
- Robust protection on bus pins (ESD/overvoltage protection)
- Low-power operation with standby/idle current benefits
- Available in compact 8-pin package (typical for MAX487 family)
Note: exact temperature range and package options vary by variant; consult the datasheet for specifics.

Package

8-pin SOIC (small-outline) surface-mount package.

Pinout

- Pin count: 8 pins
- Function: RS-485/RS-422 half-duplex transceiver (transmit/receive on a differential bus). It provides DI/RO on the logic side and A/B on the bus side, with DE (driver enable) and RE (receiver enable) controls plus Vcc and GND.

Manufacturer

Manufacturer: Maxim Integrated (now part of Analog Devices).
Company type: A U.S.-based semiconductor company that designs and manufactures analog and mixed-signal ICs (including power management and interface devices). In 2021 Maxim was acquired by Analog Devices and operates as part of ADI.

Application

MAX487ECSA is a low-power RS-485/RS-422 transceiver. Common application areas:
- Industrial automation and process control networks (RS-485/RS-422)
- Multi-point data acquisition and telemetry systems
- Building automation (HVAC, lighting, security) and smart metering
- PLC/microcontroller serial interfaces (point-to-point or multipoint)
- Long-distance, noise-immune industrial communication links

Equivalent

MAX487ECSA is a 5V, half‑duplex RS‑485/RS‑422 transceiver (8‑pin). Common equivalents from other vendors include:
- Analog Devices ADM485
- TI SN65HVD1780/1782 (and 1781)
- STMicroelectronics SP487 (and SP348x family such as SP3482/SP3485)
These offer similar 5V RS‑485/RS‑422 transceiver functionality and packaging.

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