Overview
The TRSF3232EIRGTR, produced by Texas Instruments, is a dual-channel RS-232 line driver/receiver designed to operate within a voltage range of 3V to 5.5V. This device is part of the TRSF3232E family and is packaged in a VQFN (RGT) package. It provides a robust electrical interface between an asynchronous communication controller and the serial-port connector, making it suitable for various applications requiring reliable serial communication.
The device features a dual charge-pump circuit that allows operation from a single supply voltage, eliminating the need for external voltage regulators. It also includes ±15-kV ESD protection on serial-port connection pins, ensuring high reliability in harsh environments.
Key Specifications
| Parameter | Min | Max | Unit | |
|---|---|---|---|---|
| Supply Voltage Range (VCC) | 3 | 3.3 / 5 | 5.5 | V |
| Operating Free-Air Temperature | -40 | 85 | °C | |
| Driver High-Level Output Voltage (VOH) | 5 | 5.5 | V | |
| Driver Low-Level Output Voltage (VOL) | -5 | -5.4 | V | |
| Receiver High-Level Output Voltage (VOH) | VCC - 0.6 | VCC - 0.1 | V | |
| Receiver Low-Level Output Voltage (VOL) | 0.4 | V | ||
| Maximum Data Rate | 1000 | kbit/s | ||
| ESD Protection (HBM) | ±15 kV | |||
| Supply Current (ICC) | 0.3 | 1 | mA |
Key Features
- Operates with a single 3V to 5.5V supply voltage.
- Supports data signaling rates up to 1 Mbit/s.
- Low supply current: 300 μA typical.
- ±15-kV ESD protection on serial-port connection pins.
- Dual charge-pump circuit for generating the required RS-232 voltage levels.
- External capacitors required: 4 × 0.1 μF.
- Driver output slew rate of 14 V/μs to 150 V/μs.
- Available in various packages including SOIC, SSOP, TSSOP, and VQFN.
Applications
- Battery-powered systems.
- PDAs (Personal Digital Assistants).
- Notebooks and laptops.
- Palmtop PCs and handheld equipment.
- Any application requiring reliable serial communication over RS-232 interfaces.
Q & A
- What is the operating voltage range of the TRSF3232EIRGTR?
The TRSF3232EIRGTR operates within a voltage range of 3V to 5.5V.
- What is the maximum data rate supported by the TRSF3232EIRGTR?
The device supports data signaling rates up to 1 Mbit/s.
- What kind of ESD protection does the TRSF3232EIRGTR offer?
The device offers ±15-kV ESD protection on serial-port connection pins.
- What are the typical supply current requirements for the TRSF3232EIRGTR?
The typical supply current is 300 μA.
- What external components are required for the TRSF3232EIRGTR to operate?
Four external capacitors of 0.1 μF each are required.
- In what packages is the TRSF3232EIRGTR available?
The device is available in SOIC, SSOP, TSSOP, and VQFN packages.
- What is the driver output slew rate of the TRSF3232EIRGTR?
The driver output slew rate is between 14 V/μs and 150 V/μs.
- What are some common applications for the TRSF3232EIRGTR?
Common applications include battery-powered systems, PDAs, notebooks, palmtop PCs, and handheld equipment.
- How does the dual charge-pump circuit benefit the operation of the TRSF3232EIRGTR?
The dual charge-pump circuit allows the device to operate from a single supply voltage, generating the necessary RS-232 voltage levels without external voltage regulators.
- What is the thermal pad's purpose on the VQFN package?
The thermal pad can be connected to GND or left floating to help with heat dissipation.
