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SN75121N. from TI,Texas Instruments

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SN75121N.

Manufacturer: TI

Dual Line Drivers

Partnumber Manufacturer Quantity Availability
SN75121N.,SN75121N TI 27 In Stock

Description and Introduction

Dual Line Drivers The SN75121N is a dual differential line receiver manufactured by Texas Instruments (TI).  

### **Specifications:**  
- **Type:** Dual Differential Line Receiver  
- **Supply Voltage (VCC):** 4.75V to 5.25V  
- **Input Voltage Range:** ±30V (Differential)  
- **Propagation Delay:** 20ns (Typical)  
- **Output Current:** ±8mA (Sink/Source)  
- **Operating Temperature Range:** 0°C to 70°C  
- **Package:** 16-Pin PDIP (Plastic Dual In-Line Package)  

### **Descriptions:**  
The SN75121N is designed for balanced and unbalanced digital data transmission. It features high input impedance, differential input thresholds, and TTL-compatible outputs. It is commonly used in RS-422 and RS-423 communication systems.  

### **Features:**  
- **Dual-Channel Operation**  
- **High Input Impedance (≥12kΩ)**  
- **TTL-Compatible Outputs**  
- **Wide Common-Mode Voltage Range (±7V)**  
- **Built-In Input Hysteresis for Noise Immunity**  
- **ESD Protection on Inputs**  

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

Application Scenarios & Design Considerations

Dual Line Drivers

Alternative Part Number

  • MC1489AN --: Quad line receiver in a standard DIP-14 package, widely used as a functional substitute for the SN75121N in interface applications.
  • DS75121N --: Direct second-source equivalent of the SN75121 line receiver with the same pinout and electrical characteristics.
  • UA9637ACP --: Dual differential line receiver in DIP-8 that can replace the SN75121N in many balanced-line receiver circuits with minor layout changes.

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