Texas Instruments TRS3232EQPWRQ1

Overview

TRS3232EQPWRQ1 from Texas Instruments is an automotive-qualified, dual-channel RS-232 line driver/receiver IC operating from a single 3-V to 5.5-V supply, delivering ±15-kV IEC61000-4-2 ESD protection on bus pins, supporting up to 250 kbit/s data rates, and featuring two drivers and two receivers for serial interface bridging in vehicle infotainment and telematics systems.

For engineers reviewing the TRS3232EQPWRQ1 datasheet, TRS3232EQPWRQ1 pinout, TRS3232EQPWRQ1 application, or TRS3232EQPWRQ1 equivalent, key selection criteria include its AEC-Q100 qualification, TIA/EIA-232-F compliance, low 300 µA typical supply current, 0.1 µF external capacitor requirement, and compatibility with 3.3-V logic inputs under 3.3-V VCC operation.

Technical Context

The TRS3232EQPWRQ1 integrates a dual charge-pump circuit generating ±V_CC-derived RS-232 voltage levels (±5.4 V) without requiring separate ±12-V supplies, enabling full-duplex communication over standard DB9 connectors. Its receiver inputs tolerate –25 V to +25 V, and driver outputs deliver ±30-V/µs slew rate control to reduce EMI in noisy automotive environments.

Logic-level translation is supported: DIN inputs accept 5-V logic signals even when V_CC = 3.3 V, while ROUT outputs swing rail-to-rail (V_CC–0.1 V high, 0.4 V low) compatible with standard UART controllers. The device uses positive-logic function tables-DIN low → DOUT high, RIN high → ROUT high-with 300 ns typical propagation delay per channel.

Key Specifications

Pinout & Package

TSSOP-16 (PW) package, 4.4 mm × 5.0 mm body, 0.65 mm pitch, 1.2 mm max height, RoHS-compliant NiPdAu lead finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar RS-232 transceiver applications.

Compared with TRS3232E (industrial) and TRSF3232E (high-speed), the TRS3232EQPWRQ1 uniquely combines automotive qualification, 250 kbit/s capability, and minimal external components-making it the default choice for production vehicle RS-232 interfaces where reliability, regulatory compliance, and BOM simplicity are jointly prioritized.

Availability

TRS3232EQPWRQ1 is available at Aetrix Electronics and suitable for automotive diagnostic tools, telematics control units, and infotainment serial bridges requiring stable component supply across multi-year vehicle production programs.

Supply support for TRS3232EQPWRQ1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and automotive ICs, with decades of experience in high-reliability interface solutions.

The TRS3232EQPWRQ1 belongs to TI's automotive RS-232 transceiver product line, engineered specifically for AEC-Q100 compliance, ESD-hardened serial communication, and seamless integration into vehicle electronic control units and connectivity modules.

FAQ

What automotive qualification does TRS3232EQPWRQ1 meet?

The TRS3232EQPWRQ1 is qualified to AEC-Q100 Grade 2 standards, supporting operation from –40°C to +125°C ambient temperature. It undergoes stress testing for thermal cycling, humidity bias, and ESD per automotive requirements. This qualification makes TRS3232EQPWRQ1 suitable for use in engine control modules, body control units, and telematics systems where environmental ruggedness is mandatory.

Does TRS3232EQPWRQ1 require external voltage supplies beyond V_CC?

No, TRS3232EQPWRQ1 operates from a single 3-V to 5.5-V supply and generates its own ±V_CC RS-232 voltage rails using an internal dual charge-pump circuit. Only four 0.1-µF external capacitors (C1+ / C1– / C2+ / C2–) are required-no ±12-V supplies or additional regulators are needed. This simplifies power design in space-constrained automotive modules.

Can TRS3232EQPWRQ1 interface 5-V logic signals when powered from 3.3 V?

Yes, TRS3232EQPWRQ1 accepts 5-V logic-level inputs on DIN1 and DIN2 pins even when V_CC = 3.3 V. Its driver input structure is designed for overvoltage-tolerant operation, eliminating the need for external level shifters when interfacing with legacy 5-V peripherals or mixed-voltage microcontrollers-enhancing flexibility in TRS3232EQPWRQ1-based designs.

What is the maximum data rate supported by TRS3232EQPWRQ1?

The TRS3232EQPWRQ1 supports data signaling rates up to 250 kbit/s under standard load conditions (C_L = 1000 pF, R_L = 3 kΩ). This meets or exceeds common automotive UART baud rates including 115.2 kbit/s and 230.4 kbit/s used in OBD-II diagnostics and ECU programming. Performance is verified across the full –40°C to +125°C temperature range.

How many external capacitors does TRS3232EQPWRQ1 require, and what values are specified?

TRS3232EQPWRQ1 requires exactly four external 0.1-µF ceramic capacitors (C1+, C1–, C2+, C2–) for charge-pump operation when V_CC = 3.3 V ± 0.3 V. At 5 V, the datasheet specifies C1 = 0.047 µF and C2–C4 = 0.33 µF-but the 0.1-µF solution is preferred for consistency and lower BOM cost. No electrolytic or tantalum capacitors are required.