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MAX491ECPD from MAXI,MAXIM - Dallas Semiconductor

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MAX491ECPD

Manufacturer: MAXI, MAXIM, MAXIM

15kV ESD-Protected / Slew-Rate-Limited / Low-Power / RS-485/RS-422 Transceivers

Partnumber Manufacturer Quantity Availability
MAX491ECPD MAXI, MAXIM, MAXIM 173 In Stock

Description and Introduction

15kV ESD-Protected / Slew-Rate-Limited / Low-Power / RS-485/RS-422 Transceivers The MAX491ECPD is a low-power transceiver manufactured by Maxim Integrated (now part of Analog Devices). Below are its key specifications, descriptions, and features:

### **Specifications:**
- **Manufacturer:** Maxim Integrated  
- **Part Number:** MAX491ECPD  
- **Package:** PDIP (Plastic Dual In-Line Package)  
- **Operating Voltage Range:** +4.5V to +5.5V  
- **Data Rate:** Up to 2.5Mbps  
- **Number of Drivers/Receivers:** 1 Driver, 1 Receiver  
- **Operating Temperature Range:** 0°C to +70°C  
- **ESD Protection:** ±15kV (Human Body Model)  
- **Supply Current (Shutdown Mode):** 1µA (max)  
- **Supply Current (Active Mode):** 1mA (max)  

### **Descriptions:**
The MAX491ECPD 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 includes slew-rate limiting to reduce EMI and minimize reflections in improperly terminated cables. It operates from a single +5V supply and includes a low-power shutdown mode.

### **Features:**
- **Low Power Consumption:** 1µA max in shutdown mode.  
- **Slew-Rate Limited for Reduced EMI.**  
- **RS-422/RS-485 Compliant.**  
- **Single +5V Supply Operation.**  
- **Enhanced ESD Protection (±15kV HBM).**  
- **Half-Duplex Communication.**  
- **Thermal Shutdown Protection.**  
- **Driver Output Short-Circuit Protection.**  

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

Application Scenarios & Design Considerations

15kV ESD-Protected / Slew-Rate-Limited / Low-Power / RS-485/RS-422 Transceivers

Alternative Part Number

  • SN75176BP --: Industry-standard RS-485/RS-422 transceiver in DIP-8, pin-compatible with MAX491 and widely available as a direct functional substitute.
  • ADM485ANZ --: Low-power RS-485 transceiver in DIP-8 with similar data rate and supply range, suitable drop-in replacement for MAX491 in most designs.
  • LTC485CN8 --: RS-485 transceiver in DIP-8 offering comparable performance and pinout, a reliable alternative when MAX491 is unavailable.
  • ST485CN --: Low-power RS-485/RS-422 transceiver in DIP-8 with similar electrical characteristics, offering a cost-effective alternative for the MAX491ECPD.

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