規格
| 屬性 | 價值 |
| Supplier | Analog Devices Inc./Maxim Integrated |
| Package / Case | Tube |
| 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 |
概述
Description
MAX1487CPA is a Maxim Integrated differential line transceiver designed for serial data links that use balanced lines (RS-485/RS-422 style). It combines a transmitter and receiver in one device, enabling robust, long-distance communications from a single supply. Typical features include a fail-safe receiver (outputs a known level when inputs are open or shorted), differential input/output for good noise immunity, low quiescent current, and built‑in ESD/overvoltage protection. The CPA suffix denotes a specific packaging/temperature option from Maxim, with operation usually around common 3.3V/5V supplies. Common applications are industrial control networks, building automation, and any multi‑node RS‑485/RS‑422 links. For exact electrical specs (data rate, propagation delay, protection levels, pinout), consult the MAX1487CPA datasheet. I can summarize any section if you share a link.
Equivalent
Equivalent products (RS-485/RS-422 transceivers with similar 5V, half‑duplex features) include:
- TI SN65HVD178 (and SN65HVD178B)
- Analog Devices ADM485
- STMicroelectronics SP485 (and SP3485)
- Microchip MCP4851/MCP4852
Note: verify pinout, supply range, data rate, and fail-safe behavior to ensure full compatibility with MAX1487CPA.
- TI SN65HVD178 (and SN65HVD178B)
- Analog Devices ADM485
- STMicroelectronics SP485 (and SP3485)
- Microchip MCP4851/MCP4852
Note: verify pinout, supply range, data rate, and fail-safe behavior to ensure full compatibility with MAX1487CPA.
Features
Key features of MAX1487CPA (RS-485/RS-422 transceiver):
- Half‑duplex RS‑485/RS‑422 differential transceiver
- Operates from a single supply: 3.0 V to 5.5 V
- Separate DE (driver enable) and RE (receiver enable) with tri‑state outputs
- Data rate up to about 2 Mbps (typical RS‑485 performance)
- Receiver failsafe: RO goes high when the bus is idle, shorted, or open
- Low quiescent and operating current (suitable for battery/low‑power apps)
- Robust protection: ESD/bus‑pin protection, short‑circuit and thermal protection
- Wide bus common‑mode input range and reliable bus signaling
- Small 8‑pin package options (CMOS/TTL compatible inputs)
Notes: Always verify exact specs (speed, current, protections) in the latest Maxim datasheet for MAX1487CPA, as variants may have slight differences by packaging or revision.
- Half‑duplex RS‑485/RS‑422 differential transceiver
- Operates from a single supply: 3.0 V to 5.5 V
- Separate DE (driver enable) and RE (receiver enable) with tri‑state outputs
- Data rate up to about 2 Mbps (typical RS‑485 performance)
- Receiver failsafe: RO goes high when the bus is idle, shorted, or open
- Low quiescent and operating current (suitable for battery/low‑power apps)
- Robust protection: ESD/bus‑pin protection, short‑circuit and thermal protection
- Wide bus common‑mode input range and reliable bus signaling
- Small 8‑pin package options (CMOS/TTL compatible inputs)
Notes: Always verify exact specs (speed, current, protections) in the latest Maxim datasheet for MAX1487CPA, as variants may have slight differences by packaging or revision.
Pinout
- Pin count: 20 pins (20-pin package).
- Function: Dual RS-485/RS-422 transceiver (two drivers and two receivers) with direction control, used to interface a microcontroller to differential serial networks.
- Function: Dual RS-485/RS-422 transceiver (two drivers and two receivers) with direction control, used to interface a microcontroller to differential serial networks.
Manufacturer
Manufacturer: Maxim Integrated Products (now part of Analog Devices).
What kind of company: A global semiconductor company that designs and sells analog and mixed-signal integrated circuits.
What kind of company: A global semiconductor company that designs and sells analog and mixed-signal integrated circuits.
Application
Possible application areas for MAX1487CPA:
- Industrial automation: RS-485/RS-422 multi-point control networks (PLCs, sensors, motor controllers)
- Remote sensing and data acquisition in harsh or EMI environments
- Building automation and process control systems
- Automotive/railway electronics requiring robust serial communication
- Telemetry and remote monitoring systems
- Medical equipment needing isolated, high-integrity serial interfaces
Note: Use as a differential serial transceiver with isolation for reliable long-distance links.
- Industrial automation: RS-485/RS-422 multi-point control networks (PLCs, sensors, motor controllers)
- Remote sensing and data acquisition in harsh or EMI environments
- Building automation and process control systems
- Automotive/railway electronics requiring robust serial communication
- Telemetry and remote monitoring systems
- Medical equipment needing isolated, high-integrity serial interfaces
Note: Use as a differential serial transceiver with isolation for reliable long-distance links.
Package
MAX1487CPA comes in an 8‑pin plastic surface-mount package, typically SOIC‑8 (lead‑count 8).
