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SP491ES from SIPEX

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SP491ES

Manufacturer: SIPEX

Full Duplex RS-485 Transceivers

Partnumber Manufacturer Quantity Availability
SP491ES SIPEX 100 In Stock

Description and Introduction

Full Duplex RS-485 Transceivers The SIPEX SP491ES is a low-power RS-485/RS-422 transceiver designed for half-duplex communication.  

### **Specifications:**  
- **Supply Voltage:** 4.5V to 5.5V  
- **Operating Temperature Range:** -40°C to +85°C  
- **Data Rate:** Up to 250kbps  
- **Driver Output Current:** ±60mA  
- **Receiver Input Sensitivity:** ±200mV  
- **Low Power Consumption:**  
  - **Driver Disabled (Shutdown Mode):** 1µA (typical)  
  - **Receiver Disabled (Shutdown Mode):** 20µA (typical)  
- **ESD Protection:** ±15kV (Human Body Model)  

### **Descriptions:**  
- The SP491ES is a robust transceiver suitable for industrial and commercial applications.  
- It features a fail-safe receiver design, ensuring a logic-high output when inputs are open or shorted.  
- The device includes thermal shutdown protection to prevent damage from excessive power dissipation.  

### **Features:**  
- Half-duplex communication  
- Low-power shutdown mode  
- 1/8-unit load allows up to 256 devices on the bus  
- Short-circuit current limiting  
- Thermal shutdown protection  
- Compatible with RS-485 and RS-422 standards  

This information is based solely on the manufacturer's specifications for the SP491ES from SIPEX.

Application Scenarios & Design Considerations

Full Duplex RS-485 Transceivers
Partnumber Manufacturer Quantity Availability
SP491ES SP 250 In Stock

Description and Introduction

Full Duplex RS-485 Transceivers The SP491ES is a high-speed, low-power RS-485/RS-422 transceiver manufactured by SP (Signal Processing).  

### **Specifications:**  
- **Supply Voltage:** 4.75V to 5.25V  
- **Data Rate:** Up to 10Mbps  
- **Operating Temperature Range:** -40°C to +85°C  
- **Number of Drivers/Receivers:** 1 Driver, 1 Receiver  
- **ESD Protection:** ±15kV (Human Body Model)  
- **Low Power Consumption:**  
  - **Standby Current:** 1µA (max)  
  - **Operating Current:** 1mA (max)  

### **Descriptions:**  
- The SP491ES is designed for full-duplex RS-485/RS-422 communication.  
- It features a slew-rate-limited driver for reduced EMI and reflections.  
- The device includes fail-safe circuitry to ensure a high receiver output state when inputs are open or shorted.  

### **Features:**  
- **Enhanced ESD Protection:** ±15kV HBM on bus pins  
- **Low-Power Shutdown Mode:** 1µA (max)  
- **Slew-Rate Limited for Reduced EMI**  
- **Thermal Shutdown Protection**  
- **Compatible with TIA/EIA-485-A and TIA/EIA-422-B Standards**  
- **Available in 8-Pin SOIC and PDIP Packages**  

This information is based on the manufacturer's datasheet for the SP491ES.

Application Scenarios & Design Considerations

Full Duplex RS-485 Transceivers
Partnumber Manufacturer Quantity Availability
SP491ES SIPEX 1000 In Stock

Description and Introduction

Full Duplex RS-485 Transceivers The SP491ES is a low-power RS-485/RS-422 transceiver manufactured by SIPEX (now part of Exar Corporation). Below are its key specifications, descriptions, and features:  

### **Specifications:**  
- **Supply Voltage:** +5V  
- **Operating Temperature Range:** -40°C to +85°C  
- **Data Rate:** Up to 250 kbps  
- **Number of Drivers/Receivers:** 1 Driver, 1 Receiver  
- **ESD Protection:** ±15kV (Human Body Model)  
- **Low Power Consumption:**  
  - **Supply Current (Driver Enabled):** 1.5mA (max)  
  - **Supply Current (Shutdown Mode):** 1µA (max)  
- **Half-Duplex Operation**  
- **Compliant with:**  
  - TIA/EIA-485 (RS-485)  
  - TIA/EIA-422 (RS-422)  

### **Descriptions & Features:**  
- Designed for balanced data transmission in noisy environments.  
- Features a low-power shutdown mode for power-sensitive applications.  
- Includes thermal shutdown protection to prevent damage from excessive power dissipation.  
- Driver maintains high impedance in shutdown or with power off.  
- Receiver has a fail-safe feature ensuring a logic-high output when inputs are open or shorted.  
- Available in an 8-pin SOIC package.  

This transceiver is commonly used in industrial control, instrumentation, and point-to-point data communication systems.  

(Note: SIPEX was acquired by Exar, which was later acquired by MaxLinear.)

Application Scenarios & Design Considerations

Full Duplex RS-485 Transceivers

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