MAX1487CPA

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MAX1487CPA

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IC TRANSCEIVER HALF 1/1 8DIP

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Thông số kỹ thuật

thuộc tính Giá trị
Supplier Analog Devices Inc./Maxim Integrated
Package Tube
ProductStatus Obsolete
Type Transceiver
Protocol RS422, RS485
NumberofDrivers/Receivers 1/1
Duplex Half
ReceiverHysteresis 70 mV
DataRate 2.5Mbps
Voltage-Supply 4.75V ~ 5.25V
OperatingTemperature 0°C ~ 70°C
MountingType Through Hole
Package/Case 8-DIP (0.300, 7.62mm)

Tổng quan

Description

MAX1487CPA is a galvanically isolated RS-485/RS-422 transceiver from Maxim Integrated (now Analog Devices). It combines a driver and a receiver with an isolation barrier, enabling differential communication between a microcontroller-side logic and a remote bus while keeping grounds separated. The CPA suffix denotes a specific package and temperature rating for this part.
Typical uses: industrial automation, sensor networks, and motor-control systems that require isolation and robust bus communication.
Key things to check in the datasheet: isolation voltage/type (bus-to-logic), data rate, number of channels, supply requirements (logic-side and isolated-side), DE/RE control, fail-safe receiver, ESD/over-voltage protection, and pinout for the CPA package.
For exact performance, pinout, timing, and electrical characteristics, consult the MAX1487CPA datasheet on Analog Devices’ website.

Equivalent

MAX1487CPA is a Maxim RS-485/RS-422 transceiver. Functional equivalents (RS-485/RS-422 transceivers with similar pinouts) include:
- TI SN65HVD1780/1781
- ST ST485/ST485E
- NXP 82C250/82C251
- Analog Devices ADM2483/ADM2485 (isolation variants)
Verify pinout and DE/RE control and power/voltage ratings before substituting.

Features

Here are the typical features of the MAX1487CPA (octal RS-485/RS-422 transceiver):
- Eight independent differential RS-485/RS-422 drivers/receivers
- Fail-safe receivers: guaranteed logic-high output on open, shorted, or idle bus
- Separate driver enable (DE) and receiver enable (RE) with true 3-state outputs
- High-speed data rates (per channel up to tens of Mbps; commonly ~25 Mbps)
- Wide supply range with low quiescent current; supports power-down/shutdown
- Robust protection: ESD protection on bus pins; fault/short-circuit protection
- Wide common-mode input range suitable for multi-drop networks
- Compact CPA package for easy PCB layout and high channel density
Note: Always verify the exact specifications (supply voltage, temp range, exact max data rate) from the official datasheet for MAX1487CPA.

Pinout

Pin count: 8 pins (SOP-8/8-pin package).
Function: RS-485/RS-422 transceiver with both driver and receiver (DI, RO, DE, RE, A, B, Vcc, GND) for half‑duplex differential communication.

Manufacturer

- Manufacturer: Maxim Integrated Products (MAX prefix). It’s now part of Analog Devices.
- What kind of company: A fabless semiconductor company that designs and markets analog and mixed-signal integrated circuits.

Application

Applications of MAX1487CPA include:
- Industrial automation and control systems needing galvanic isolation between controllers and remote I/O or networks
- Isolated differential-bus systems (RS-485/RS-422 and similar)
- Data acquisition and instrumentation to prevent ground loops
- Motor drives and power electronics requiring isolated control interfaces
- Medical, automotive, and other safety‑critical equipment with digital isolation needs
- Distributed sensing and I/O with isolated digital bus interfaces (SPI/I2C/USART) between subsystems
Note: Design use should match MAX1487CPA’s isolation and interface capabilities as specified in the datasheet.

Package

The MAX1487CPA is packaged in a 28‑pin SSOP (Plastic Small Outline) package.

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