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SP491ECP from SIPEX

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SP491ECP

Manufacturer: SIPEX

Enhanced Full Duplex RS-485 Transceivers

Partnumber Manufacturer Quantity Availability
SP491ECP SIPEX 221 In Stock

Description and Introduction

Enhanced Full Duplex RS-485 Transceivers The SP491ECP is a RS-485/RS-422 transceiver manufactured by SIPEX (now part of Exar Corporation). Below are its specifications, descriptions, and features based on factual information from Ic-phoenix technical data files:  

### **Specifications:**  
- **Supply Voltage:** 5V ±10%  
- **Data Rate:** Up to 10 Mbps  
- **Operating Temperature Range:** -40°C to +85°C  
- **Number of Drivers/Receivers:** 1 Driver, 1 Receiver  
- **ESD Protection:** ±15kV (Human Body Model)  
- **Package:** 8-pin PDIP, SOIC  

### **Descriptions:**  
- The SP491ECP is a low-power, high-speed RS-485/RS-422 transceiver designed for balanced communication.  
- It supports half-duplex communication and features slew-rate limiting for reduced EMI.  
- The device includes thermal shutdown and short-circuit protection.  

### **Features:**  
- **Low Power Consumption:** Typically 120μA in shutdown mode.  
- **Enhanced ESD Protection:** Protects against electrostatic discharge.  
- **Slew-Rate Limited Outputs:** Reduces EMI and reflections in transmission lines.  
- **Wide Common-Mode Range:** -7V to +12V for noise immunity.  
- **Driver Short-Circuit Protection:** Ensures reliability under fault conditions.  

This information is based on the manufacturer's datasheet and technical documentation.

Application Scenarios & Design Considerations

Enhanced Full Duplex RS-485 Transceivers

Alternative Part Number

  • MAX491ECP --: Pin-compatible RS-485/RS-422 transceiver with the same ESD protection and full-duplex configuration, widely available and a common drop-in replacement for the SP491ECP.
  • SN75176BP --: Industry-standard RS-485 differential bus transceiver in a DIP-8 package; functionally similar signaling but half-duplex, so verify duplex requirements before use.
  • ADM485ANZ --: Low-power RS-485 transceiver in DIP-8 with comparable data rate and supply range; a reliable alternative when the SP491ECP is unavailable, though duplex mode should be checked.

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