MAX1488EEPD+ - English Editing Encyclopedia Entry

Product Overview

Category

The MAX1488EEPD+ belongs to the category of integrated circuits (ICs).

Use

This IC is commonly used for serial communication applications, specifically for RS-485/RS-422 transceiver functions.

Characteristics

• The MAX1488EEPD+ is a low-power transceiver that operates with a single 5V supply.
• It supports data rates up to 250kbps, making it suitable for various industrial and communication applications.
• This IC features a slew-rate-limited driver that reduces electromagnetic interference (EMI) and minimizes reflections on transmission lines.
• It has a wide common-mode voltage range, allowing reliable communication in noisy environments.
• The MAX1488EEPD+ offers thermal shutdown protection, preventing damage due to excessive temperature.

Package and Quantity

The MAX1488EEPD+ is available in an industry-standard 14-pin plastic dual in-line package (PDIP). It is typically sold in reels or tubes containing a quantity of 250 units.

Specifications

• Supply Voltage: 4.75V to 5.25V
• Data Rate: Up to 250kbps
• Operating Temperature Range: -40°C to +85°C
• Driver Output Current: ±60mA
• Receiver Input Voltage Range: -7V to +12V
• Shutdown Supply Current: 1μA (typical)

Pin Configuration

The MAX1488EEPD+ has a total of 14 pins, each serving a specific function:

1. DE (Driver Output Enable)
2. RE (Receiver Output Enable)
3. DI (Driver Input)
4. RO (Receiver Output)
5. A (Non-Inverting Driver Output / Receiver Input)
6. B (Inverting Driver Output / Receiver Input)
7. GND (Ground)
8. B (Inverting Driver Output / Receiver Input)
9. A (Non-Inverting Driver Output / Receiver Input)
10. VCC (Supply Voltage)
11. RE (Receiver Output Enable)
12. DE (Driver Output Enable)
13. GND (Ground)
14. DI (Driver Input)

Functional Features

• The MAX1488EEPD+ provides a full-duplex, differential communication interface for RS-485/RS-422 networks.
• It incorporates fail-safe circuitry that ensures the receiver outputs are in a known state when the inputs are open or shorted.
• This IC supports half-duplex operation through the control of the driver and receiver enable pins.
• It offers thermal shutdown protection, which disables the device if the temperature exceeds the specified limit.

Advantages and Disadvantages

Advantages

• Low-power consumption
• Wide common-mode voltage range
• Slew-rate-limited driver reduces EMI
• Fail-safe circuitry for reliable communication
• Thermal shutdown protection

Disadvantages

• Limited data rate compared to some other transceivers
• Availability only in PDIP package

Working Principles

The MAX1488EEPD+ operates by converting the logic-level signals from the driver input (DI) into differential voltage signals on the A and B outputs. These signals are then transmitted over the RS-485/RS-422 network. On the receiving end, the differential voltage signals are converted back into logic-level signals by the receiver inputs (A and B). The driver and receiver enable pins (DE and RE) control the direction of data flow, allowing half-duplex communication.

Detailed Application Field Plans

The MAX1488EEPD+ is widely used in various industrial and communication applications, including:

1. Industrial automation systems
2. Building automation and control systems
3. HVAC (Heating, Ventilation, and Air Conditioning) systems
4. Security systems
5. Data communication networks
6. Instrumentation and measurement equipment

Detailed Alternative Models

1. MAX1487E - Similar to the MAX1488EEPD+, but with a lower data rate of 120kbps.
2. MAX485 - A popular alternative with higher data rates up to 2.5Mbps.
3. SN75176 - Another widely used RS-485 transceiver with similar characteristics.

In conclusion, the MAX1488EEPD+ is a versatile IC designed for reliable serial communication in RS-485/RS-422 networks. Its low-power consumption, wide common-mode voltage range, and thermal shutdown protection make it suitable for various industrial and communication applications. However, its limited data rate and availability only in PDIP package may be considered as disadvantages.