Overview
The TRS3221EIRGTR, produced by Texas Instruments, is a single-channel RS-232 line driver and receiver designed to operate within a voltage range of 3V to 5.5V. This device is compliant with the TIA/EIA-232-F and ITU v.28 standards, ensuring reliable communication in various applications. It features a single driver and a single receiver, making it a compact solution for converting single-ended signals into RS-232 compatible signals and vice versa. The device is notable for its high ESD protection, low standby current, and auto-powerdown feature, which enhances power efficiency by disabling the drivers when not in use.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range | 3 to 5.5 | V |
| Data Signaling Rate | Up to 250 | kbit/s |
| Driver Output Slew Rate | Up to 30 | V/μs |
| ESD Protection (HBM) | ±15kV | |
| ESD Protection (IEC 61000-4-2 Contact Discharge) | ±8kV | |
| ESD Protection (IEC 61000-4-2 Air-Gap Discharge) | ±15kV | |
| Operating Free-Air Temperature | -40 to 85 | °C |
| Standby Current | 1 μA (Typical) | |
| Package Types | SSOP, TSSOP, VQFN, SOT-23-THN |
Key Features
- Meets or exceeds TIA/EIA-232-F and ITU v.28 standards
- Operates with a single 3V to 5.5V VCC supply
- High ESD protection: ±15kV HBM, ±8kV IEC 61000-4-2 contact discharge, and ±15kV IEC 61000-4-2 air-gap discharge
- Auto-powerdown feature for power savings
- Low standby current: 1 μA typical
- Accepts 5V logic input with 3.3V supply
- Compact package options including near chip-scale package (VQFN)
- External capacitors: 4 × 0.1μF required
Applications
- Industrial PCs
- Wired networking
- Data center and enterprise computing
- Battery-powered systems
- PDAs, notebooks, laptops, and palmtop PCs
- Hand-held equipment
Q & A
- What is the operating voltage range of the TRS3221EIRGTR?
The TRS3221EIRGTR operates within a voltage range of 3V to 5.5V. - What are the data signaling rates supported by the TRS3221EIRGTR?
The device supports data signaling rates up to 250 kbit/s. - What level of ESD protection does the TRS3221EIRGTR offer?
The device offers ±15kV HBM, ±8kV IEC 61000-4-2 contact discharge, and ±15kV IEC 61000-4-2 air-gap discharge ESD protection. - What is the standby current of the TRS3221EIRGTR?
The standby current is typically 1 μA. - Does the TRS3221EIRGTR support auto-powerdown?
Yes, the device features an auto-powerdown mode to save power when not in use. - What types of packages are available for the TRS3221EIRGTR?
The device is available in SSOP, TSSOP, VQFN, and SOT-23-THN packages. - What is the purpose of the INVALID output pin?
The INVALID output pin indicates whether the receiver input is valid or not, going high for valid data and low for invalid data. - Can the TRS3221EIRGTR be used in battery-powered systems?
Yes, the device is suitable for use in battery-powered systems due to its low power consumption. - How does the auto-powerdown feature work?
The auto-powerdown feature disables the drivers when the device does not sense a valid RS-232 signal on the receiver input, reducing supply current to 1 μA. - What are the thermal characteristics of the TRS3221EIRGTR?
The device has various thermal metrics depending on the package type, such as junction-to-ambient thermal resistance.
