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MAX485CPA
+Lista de MateriaisIC TRANSCEIVER HALF 1/1 8PDIP
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FabricanteAnalog Devices Inc./Maxim Integrated
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Peça do Fabricante #MAX485CPA
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Especificações
| Atributo | Valor |
| 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 |
Visão Geral
Description
MAX485CPA is an 8‑pin Maxim (now Analog Devices) RS-485/RS-422 transceiver. It provides a low-power, half‑duplex differential interface so a microcontroller can talk over twisted-pair networks.
Key points:
- 5V single-supply, 1/8 unit load, up to about 2.5 Mbps data rate.
- Differential driver (A/B) and receiver with failsafe output (RO goes high when the bus is idle/open/shorted).
- Separate control pins: DE (driver enable) and /RE (receiver enable) for easy direction control.
- Low quiescent current, suitable for battery-powered/low-power apps.
- CPA suffix denotes a specific package/temperature variant; check the datasheet for exact packaging (e.g., SOIC/DIP) and temp range.
- Common uses: industrial controls, building automation, motor drives, and sensor networks requiring robust RS-485/RS-422 communication.
How to use: connect RO to the MCU RX, DI to the MCU TX, DE/RE per your control logic, and provide bus termination and biasing as needed.
Key points:
- 5V single-supply, 1/8 unit load, up to about 2.5 Mbps data rate.
- Differential driver (A/B) and receiver with failsafe output (RO goes high when the bus is idle/open/shorted).
- Separate control pins: DE (driver enable) and /RE (receiver enable) for easy direction control.
- Low quiescent current, suitable for battery-powered/low-power apps.
- CPA suffix denotes a specific package/temperature variant; check the datasheet for exact packaging (e.g., SOIC/DIP) and temp range.
- Common uses: industrial controls, building automation, motor drives, and sensor networks requiring robust RS-485/RS-422 communication.
How to use: connect RO to the MCU RX, DI to the MCU TX, DE/RE per your control logic, and provide bus termination and biasing as needed.
Equivalent
Equivalent RS-485/RS-422 half‑duplex transceivers to MAX485CPA include:
- Analog Devices ADM485
- Texas Instruments SN65HVD178 (and SN65HVD178A)
- STMicroelectronics SP485
- Microchip MCP4851
Note: choose a device with the same voltage, speed, slave enable/DE behavior, and package to match your design.
- Analog Devices ADM485
- Texas Instruments SN65HVD178 (and SN65HVD178A)
- STMicroelectronics SP485
- Microchip MCP4851
Note: choose a device with the same voltage, speed, slave enable/DE behavior, and package to match your design.
Features
Here are the key features of MAX485CPA:
- 5V, single-supply, 8-pin package RS-485/RS-422 transceiver
- Half-duplex operation (DI/RO with DE/RE control)
- Data rate up to 2.5 Mbps
- 1/8 unit load on the bus (supports up to 128 nodes)
- Fail-safe receiver: RO goes high when inputs are open, shorted, or idle
- Independent driver enable (DE) and receiver enable (RE)
- Wide receiver input common-mode range (-7V to +12V)
- ESD protection on I/O pins
- Industrial temperature range: -40°C to +85°C
Optional: Available in common small-package options for compact designs.
- 5V, single-supply, 8-pin package RS-485/RS-422 transceiver
- Half-duplex operation (DI/RO with DE/RE control)
- Data rate up to 2.5 Mbps
- 1/8 unit load on the bus (supports up to 128 nodes)
- Fail-safe receiver: RO goes high when inputs are open, shorted, or idle
- Independent driver enable (DE) and receiver enable (RE)
- Wide receiver input common-mode range (-7V to +12V)
- ESD protection on I/O pins
- Industrial temperature range: -40°C to +85°C
Optional: Available in common small-package options for compact designs.
Pinout
MAX485CPA is an 8-pin, low‑power RS-485/RS-422 transceiver.
Pinout (8 pins):
- 1 RO — Receiver Output
- 2 RE# — Receiver Enable (active LOW)
- 3 DE — Driver Enable (active HIGH)
- 4 DI — Driver Input
- 5 GND — Ground
- 6 A — RS-485 bus A
- 7 B — RS-485 bus B
- 8 VCC — Supply Voltage
Pinout (8 pins):
- 1 RO — Receiver Output
- 2 RE# — Receiver Enable (active LOW)
- 3 DE — Driver Enable (active HIGH)
- 4 DI — Driver Input
- 5 GND — Ground
- 6 A — RS-485 bus A
- 7 B — RS-485 bus B
- 8 VCC — Supply Voltage
Manufacturer
- Manufacturer: Maxim Integrated (now part of Analog Devices).
- Company type: a semiconductor company that designs and manufactures analog and mixed-signal integrated circuits (multinational, based in the United States).
- Company type: a semiconductor company that designs and manufactures analog and mixed-signal integrated circuits (multinational, based in the United States).
Application
MAX485CPA is a low‑power, half‑duplex RS‑485/RS‑422 transceiver. Typical application areas include:
- Industrial automation and PLC networks
- Building automation (HVAC, lighting, access control)
- Data acquisition, telemetry, and SCADA
- Embedded microcontroller systems needing robust differential serial comms
- Remote I/O, test equipment, and instrumentation
- Automotive/transportation lab equipment using RS‑485 networks
Notes: it supports 5V operation, up to 2.5 Mbps data rate, and low quiescent current.
- Industrial automation and PLC networks
- Building automation (HVAC, lighting, access control)
- Data acquisition, telemetry, and SCADA
- Embedded microcontroller systems needing robust differential serial comms
- Remote I/O, test equipment, and instrumentation
- Automotive/transportation lab equipment using RS‑485 networks
Notes: it supports 5V operation, up to 2.5 Mbps data rate, and low quiescent current.
Package
MAX485CPA uses an 8-pin package, typically an SOIC-8 (surface-mount).
