Overview
The TRSF3243EIRHBR, produced by Texas Instruments, is a 3-V to 5.5-V multichannel RS-232 compatible line driver and receiver. This device is designed to provide the electrical interface between an asynchronous communication controller and the serial-port connector. It features a dual charge-pump circuit and includes three line drivers, five line receivers, and robust ESD protection. The TRSF3243EIRHBR operates with a single supply voltage, making it versatile for various applications requiring serial communication.
Key Specifications
| Parameter | Min | Nom | Max | Unit |
|---|---|---|---|---|
| Supply Voltage (VCC) | 3.0 (3.3V), 4.5 (5V) | 3.3 (3.3V), 5 (5V) | 3.6 (3.3V), 5.5 (5V) | V |
| Driver and Control High-Level Input Voltage (VIH) | 2 (3.3V), 2.4 (5V) | - | - | V |
| Driver and Control Low-Level Input Voltage (VIL) | 0.8 | - | - | V |
| Receiver Input Voltage | -25 | - | 25 | V |
| Operating Free-Air Temperature | -40 | - | 85 | °C |
| ESD Protection (HBM) | ±15 kV | - | - | - |
| ESD Protection (IEC 61000-4-2, Contact Discharge) | ±8 kV | - | - | - |
| ESD Protection (IEC 61000-4-2, Air-Gap Discharge) | ±15 kV | - | - | - |
| Data Signaling Rate | 250 kbit/s | - | 1 Mbit/s | - |
| Standby Current | - | 1 μA | - | - |
Key Features
- Operates with a single 3-V to 5.5-V VCC supply.
- Always-active noninverting receiver output (ROUT2B).
- Low standby current: 1 μA typical.
- External capacitors: 4 × 0.1 μF required.
- Accepts 5-V logic input with 3.3-V supply.
- Serial-mouse driveability.
- Supports operation up to 1 Mbit/s.
- Auto-powerdown feature to disable driver outputs when no valid RS-232 signal is sensed.
- Robust ESD protection: ±15-kV HBM, ±8-kV IEC 61000-4-2 Contact Discharge, and ±15-kV IEC 61000-4-2 Air-Gap Discharge.
- Available in space-saving VQFN-32 package (5 mm x 5 mm).
Applications
- Industrial PCs
- Wired networking
- Data center and networking equipment
- Notebooks and laptops
- Hand-held equipment
- Battery-powered systems
- PDAs and palmtop PCs
Q & A
- What is the operating voltage range of the TRSF3243EIRHBR?
The TRSF3243EIRHBR operates with a single supply voltage ranging from 3-V to 5.5-V.
- What is the ESD protection level of the TRSF3243EIRHBR?
The device offers ±15-kV ESD protection using the Human-Body Model (HBM) and ±8-kV ESD protection for IEC 61000-4-2 Contact Discharge, as well as ±15-kV for Air-Gap Discharge.
- What is the maximum data signaling rate supported by the TRSF3243EIRHBR?
The device supports operation up to 1 Mbit/s.
- What is the typical standby current of the TRSF3243EIRHBR?
The typical standby current is 1 μA.
- Does the TRSF3243EIRHBR support 5-V logic input with a 3.3-V supply?
Yes, it accepts 5-V logic input with a 3.3-V supply.
- What is the purpose of the auto-powerdown feature in the TRSF3243EIRHBR?
The auto-powerdown feature disables the driver outputs when no valid RS-232 signal is sensed, reducing power consumption.
- What package options are available for the TRSF3243EIRHBR?
The device is available in a space-saving VQFN-32 package (5 mm x 5 mm).
- What are the typical applications of the TRSF3243EIRHBR?
Typical applications include industrial PCs, wired networking, data center and networking equipment, notebooks, laptops, and hand-held equipment.
- How many external capacitors are required for the TRSF3243EIRHBR?
Four external capacitors (4 × 0.1 μF) are required.
- Is the TRSF3243EIRHBR compatible with other Texas Instruments devices?
Yes, it is inter-operable with devices like the SN65C3238 and SN75C3238.
