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MAX491EPD from MAXIM,MAXIM - Dallas Semiconductor

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MAX491EPD

Manufacturer: MAXIM, MAX

Low-Power / Slew-Rate-Limited RS-485/RS-422 Transceivers

Partnumber Manufacturer Quantity Availability
MAX491EPD MAXIM, MAX 4533 In Stock

Description and Introduction

Low-Power / Slew-Rate-Limited RS-485/RS-422 Transceivers The MAX491EPD is a low-power transceiver manufactured by Maxim Integrated. Below are its specifications, descriptions, and features based on factual information:

### **Specifications:**  
- **Manufacturer:** Maxim Integrated  
- **Part Number:** MAX491EPD  
- **Package:** 14-Pin PDIP (Plastic Dual In-Line Package)  
- **Operating Voltage:** 4.5V to 5.5V  
- **Data Rate:** Up to 2.5Mbps  
- **Operating Temperature Range:** -40°C to +85°C  
- **Number of Drivers/Receivers:** 1 Driver, 1 Receiver  
- **Supply Current (Standby):** Typically 300µA  
- **ESD Protection:** ±15kV (Human Body Model)  

### **Description:**  
The MAX491EPD is a low-power, RS-422/RS-485 compliant transceiver designed for balanced communication. It features a single driver and receiver, making it suitable for half-duplex applications. The device operates from a single 5V supply and includes thermal shutdown protection to prevent damage from excessive power dissipation.

### **Features:**  
- **Low Power Consumption:** Ideal for battery-powered applications.  
- **Half-Duplex Operation:** Supports bidirectional communication.  
- **Thermal Shutdown Protection:** Prevents damage from overheating.  
- **Wide Common-Mode Input Range:** Ensures robust noise immunity.  
- **Driver Short-Circuit Current Limiting:** Enhances reliability.  
- **Compatible with RS-422/RS-485 Standards:** Ensures interoperability.  

For detailed electrical characteristics and application notes, refer to the official Maxim Integrated datasheet.

Application Scenarios & Design Considerations

Low-Power / Slew-Rate-Limited RS-485/RS-422 Transceivers

Alternative Part Number

  • SN75176BP --: Industry-standard RS-485/RS-422 differential transceiver in a 14-pin DIP, functionally similar to the MAX491 and widely available as a drop-in style replacement.
  • ADM485JN --: Low-power RS-485 transceiver in a 14-pin DIP package with comparable data rate and driver/receiver characteristics to the MAX491.
  • ST485BN --: RS-485/RS-422 transceiver in a DIP-14 package offering similar electrical performance and a cost-effective alternative to the MAX491.
  • ADM485ANZ --: Low-power RS-485 transceiver in DIP-8/14 style packaging with similar data rate and driver/receiver characteristics, suitable for drop-in RS-485 bus applications.

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