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MAX485CPA

Name: MAX485CPA
Rating: 4.7 (12 reviews)

IC TRANSCEIVER HALF 1/1 8PDIP

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規格

Part Status	Obsolete
Type	Transceiver
Protocol	RS422, RS485
Number of Drivers/Receivers	1/1
Duplex	Half
Receiver Hysteresis	70 mV
Data Rate	2.5Mbps
Voltage - Supply	4.75V ~ 5.25V
Operating Temperature	0°C ~ 70°C
Mounting Type	Through Hole
Package / Case	8-DIP (0.300", 7.62mm)
Supplier Device Package	8-PDIP
Base Product Number	MAX485

概述

Description

MAX485CPA is Maxim Integrated’s low‑power RS‑485/RS‑422 transceiver. It provides half‑duplex differential serial communication for multi‑node networks (useful in industrial automation, building automation, etc.).
Key points:
- 5V single‑supply operation with low power consumption.
- Data rate up to about 2.5 Mbps (RS‑485 compatible).
- A/B pins drive the differential bus; DI is MCU transmit, RO is MCU receive.
- DE (driver enable) and RE (receiver enable) control transmission and reception.
- Receiver features a failsafe output (RO goes high when the bus is idle/open/shorted).
- Available in small 8‑pin packages (DIP/SOIC), with 1/8‑unit‑load on the bus for many nodes.
Typical use: connect a microcontroller to a twisted‑pair RS‑485 network for reliable, multi‑point communication. Keep in mind DE/RE control timing to avoid bus conflicts.

Features

MAX485CPA features (concise):
- 5V single-supply operation
- Half-duplex RS-485/RS-422 transceiver
- Data rate up to 2.5 Mbps
- 1/8-unit-load receiver (enables many nodes on a single bus)
- Separate DE and /RE controls for direction and enable
- Tri-state outputs for bus sharing
- Failsafe receiver output (RO) stays high when inputs are open, idle, or shorted
- Low-power CMOS design; suitable for battery/low-power apps
- Industrial temperature range (typical options in variant family)
- Available in compact 8-pin packages (e.g., DIP/SOIC)
Note: For exact electrical numbers and package options, consult the MAX485CPA datasheet.

Package

MAX485CPA comes in an 8-pin Plastic DIP (PDIP) package.

Pinout

- Pin count: 8 pins
- Function: Low-power, half‑duplex RS-485/RS-422 transceiver (driver and receiver). DI feeds the driver, RO is the receiver output, DE enables the driver, RE enables the receiver, with A and B as the differential bus pins, plus VCC and GND.
- Typical pinout: 1 RO, 2 RE (active low), 3 DE, 4 DI, 5 GND, 6 A, 7 B, 8 VCC.

Manufacturer

- Manufacturer: Maxim Integrated (the MAX485CPA product line; now part of Analog Devices after the acquisition in 2021).
- What kind of company: A semiconductor company that designs and markets analog and mixed-signal integrated circuits (e.g., RS-485 transceivers).

Application

MAX485CPA is a low‑power, 5V, half‑duplex RS‑485/RS‑422 transceiver. Typical applications:
- Industrial automation and PLC networks (multi‑point RS‑485)
- Building automation, smart meters, HVAC, energy monitoring
- Remote telemetry and SCADA
- Data acquisition and distributed sensor networks
- Networked instrumentation and serial links in noisy environments
(Uses: long‑distance, multi‑point serial communication with noise immunity.)

Equivalent

Equivalent RS-485 half‑duplex transceivers to MAX485CPA include:
- Analog Devices: ADM485
- Texas Instruments: SN65HVD178 (and SN65HVD75 family)
- Exar/MaxLinear: SP3482, SP3485
- Intersil/Renesas: ISL8480, ISL8482
Notes: these are functionally similar (5V RS‑485, half‑duplex), but pinouts and timing vary. Check data sheets for voltage, speed, and package compatibility before cross‑replacing.