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ST485B from ST8,ST Microelectronics

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ST485B

Manufacturer: ST8

LOW POWER RS-485/RS-422 TRANSCEIVER

Partnumber Manufacturer Quantity Availability
ST485B ST8 1722 In Stock

Description and Introduction

LOW POWER RS-485/RS-422 TRANSCEIVER The ST485B is a low-power transceiver manufactured by STMicroelectronics (ST). It is designed for RS-485 and RS-422 communication applications.  

### **Specifications:**  
- **Supply Voltage:** 5V ±10%  
- **Operating Temperature Range:** -40°C to +85°C  
- **Data Rate:** Up to 2.5 Mbps  
- **Low Power Consumption:**  
  - Driver disabled: 120 µA (max)  
  - Receiver disabled: 120 µA (max)  
- **Half-Duplex Communication**  
- **ESD Protection:** ±15 kV (Human Body Model)  
- **Driver Output Current:** ±60 mA (short-circuit protected)  
- **Receiver Input Sensitivity:** ±200 mV  
- **Common-Mode Voltage Range (Receiver):** -7V to +12V  
- **Number of Drivers/Receivers:** 1 Driver, 1 Receiver  

### **Descriptions:**  
The ST485B is a robust, low-power transceiver suitable for industrial and commercial RS-485/RS-422 applications. It features fail-safe circuitry to ensure a high logic level when inputs are open or shorted.  

### **Features:**  
- **Enhanced ESD Protection**  
- **Thermal Shutdown Protection**  
- **Driver Short-Circuit Current Limiting**  
- **Wide Common-Mode Range for Noise Immunity**  
- **Compatible with TTL and CMOS Logic Levels**  
- **Available in SO-8 and DIP-8 Packages**  

The ST485B is commonly used in industrial control systems, building automation, and point-of-sale equipment.  

(Source: STMicroelectronics datasheet for ST485B)

Application Scenarios & Design Considerations

LOW POWER RS-485/RS-422 TRANSCEIVER
Partnumber Manufacturer Quantity Availability
ST485B ST 403 In Stock

Description and Introduction

LOW POWER RS-485/RS-422 TRANSCEIVER The ST485B is a low-power transceiver manufactured by STMicroelectronics, designed for RS-485 and RS-422 communication applications.  

### **Specifications:**  
- **Supply Voltage (VCC):** 4.75V to 5.25V  
- **Operating Temperature Range:** -40°C to +85°C  
- **Data Rate:** Up to 2.5 Mbps  
- **Low Power Consumption:** Typically 300 µA in shutdown mode  
- **Driver Output Current:** ±60 mA (short-circuit protected)  
- **Receiver Input Impedance:** ≥12 kΩ  
- **ESD Protection:** ±15 kV (Human Body Model)  
- **Package Options:** SO-8, PDIP-8  

### **Descriptions and Features:**  
- **Half-Duplex Communication:** Supports bidirectional data transmission over a single twisted pair.  
- **Enhanced ESD Protection:** Robust protection against electrostatic discharge.  
- **Thermal Shutdown Protection:** Prevents damage from excessive heat.  
- **Wide Common-Mode Range:** ±-7V for noise immunity in industrial environments.  
- **Driver Enable/Disable Control:** Allows for bus sharing in multi-drop networks.  
- **Compliance:** Meets TIA/EIA-485-A and TIA/EIA-422-B standards.  

The ST485B is commonly used in industrial control systems, instrumentation, and long-distance data transmission applications.

Application Scenarios & Design Considerations

LOW POWER RS-485/RS-422 TRANSCEIVER

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