3-V to 5.5-V Single-Channel RS-232 Line Driver/Receiver With +/-15-kV IEC ESD Protection 16-SSOP -40 to 85 The **TRS3221EIDB** is a **3-V to 5.5-V multichannel RS-232 line driver/receiver** manufactured by **Texas Instruments (TI)**.  

### **Key Specifications:**  
- **Supply Voltage Range:** **3 V to 5.5 V**  
- **Data Rate:** Up to **1 Mbps**  
- **Number of Drivers/Receivers:** **3 Drivers, 5 Receivers**  
- **ESD Protection:** **±15 kV (Human Body Model)**  
- **Operating Temperature Range:** **-40°C to +85°C**  
- **Package:** **SSOP-28 (DB)**  

### **Features:**  
- **Low Power Consumption:** Auto-powerdown feature to reduce power usage.  
- **Enhanced ESD Protection:** Protects against electrostatic discharge.  
- **Wide Supply Voltage Range:** Supports 3.3 V and 5 V systems.  
- **Meets EIA/TIA-232-F Standards:** Ensures compatibility with RS-232 communication.  
- **External Capacitors:** Requires only **0.1 µF** capacitors for charge pump.  

### **Applications:**  
- **Industrial Equipment**  
- **Point-of-Sale (POS) Terminals**  
- **Networking & Telecom Devices**  
- **Battery-Powered Systems**  

This device is designed for **robust RS-232 communication** in **mixed-voltage environments**.