Overview
The TRS3122ERGET from Texas Instruments is a highly versatile and efficient 1.8 V low power dual RS-232 transceiver. This device is designed to operate in a wide range of voltage conditions, making it compatible with modern system requirements. It features a unique tripler charge pump architecture that enables operation at low VCC levels of 1.8 V while maintaining compatibility with 3.3 V and 5 V supplies. The TRS3122ERGET is particularly suited for applications requiring low power consumption, enhanced ESD protection, and high data rates up to 1000 kbps.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| VCC (Charge Pump Power Supply) | 1.65 | 1.8 | 5.5 | V |
| VL (Logic Power Supply) | 1.65 | - | VCC | V |
| RS-232 Receiver Interface (RIN) | -15 | - | 15 | V |
| RS-232 Transmitter Interface (DOUT) | -12 | - | 12 | V |
| Data Rate | - | - | 1000 | kbps |
| Operating Temperature | -40 | - | 85 | °C |
| Shutdown Supply Current | - | - | 0.5 | μA |
| ESD Protection (Human Body Model) | - | - | ±15 kV | - |
| ESD Protection (IEC 61000-4-2 Air-Gap Discharge) | - | - | ±15 kV | - |
| ESD Protection (IEC 61000-4-2 Contact Discharge) | - | - | ±8 kV | - |
Key Features
- Extended VCC Operating Range: Compatible with 1.8 V, 3.3 V, and 5.0 V supplies.
- Unique Tripler Charge Pump Architecture: Enables low VCC operation while maintaining compatibility with higher voltage supplies.
- Integrated Level-Shifting Functionality: Eliminates the need for external power or additional level shifters when interfacing with low-voltage MCUs.
- Enhanced ESD Protection: ±15 kV IEC 61000-4-2 Air-Gap Discharge, ±8 kV IEC 61000-4-2 Contact Discharge, and ±15 kV Human-Body Model.
- Auto Powerdown Plus Feature: Automatically places the device in a low power mode after 30 seconds of inactivity.
- Low Shutdown Supply Current: Typically 0.5 μA.
- High Data Rate Capability: Up to 1000 kbps.
- Mixed-Logic Voltage System Compatibility: The VL pin allows operation in mixed-logic voltage systems without additional voltage level shifters.
Applications
- Remote Radio Unit (RRU): For wireless communication systems.
- Base Band Unit (BBU): In telecommunications infrastructure.
- Electronic Point of Sale (EPOS): For transactional systems.
- Diagnostics & Data Transmission: In various industrial and medical devices.
- Battery-Powered Equipment: Ideal for power-sensitive applications.
Q & A
- What is the operating voltage range of the TRS3122ERGET?
The TRS3122ERGET operates within a VCC range of 1.65 V to 5.5 V. - What is the unique feature of the charge pump in TRS3122ERGET?
The charge pump features a tripler architecture that allows operation at low VCC levels while maintaining compatibility with higher voltage supplies. - What is the maximum data rate supported by the TRS3122ERGET?
The device supports data rates up to 1000 kbps. - How does the Auto Powerdown Plus feature work?
The Auto Powerdown Plus feature automatically places the device in a low power mode after 30 seconds of inactivity on the driver or receiver inputs. - What level of ESD protection does the TRS3122ERGET offer?
The device offers ±15 kV IEC 61000-4-2 Air-Gap Discharge, ±8 kV IEC 61000-4-2 Contact Discharge, and ±15 kV Human-Body Model ESD protection. - What is the typical shutdown supply current of the TRS3122ERGET?
The typical shutdown supply current is 0.5 μA. - Can the TRS3122ERGET operate in mixed-logic voltage systems?
Yes, the VL pin allows operation in mixed-logic voltage systems without additional voltage level shifters. - What are some common applications of the TRS3122ERGET?
Common applications include remote radio units, base band units, electronic point of sale systems, diagnostics and data transmission, and battery-powered equipment. - How does the device protect against electrostatic discharges?
The device incorporates ESD protection structures on all pins, with enhanced protection on RS-232 bus pins. - What is the operating temperature range of the TRS3122ERGET?
The operating temperature range is from -40°C to 85°C.
