Texas Instruments TRSF3223EIRGWR

Overview

TRSF3223EIRGWR from Texas Instruments is a 3-V to 5.5-V dual RS-232 line driver and receiver IC with ±15-kV IEC 61000-4-2 contact ESD protection, 1000 kbit/s data rate capability, and auto-powerdown mode reducing supply current to 1 μA. It integrates a dual charge-pump circuit and supports 3.3-V logic inputs on a 3.3-V supply, enabling direct interface with low-voltage microcontrollers in portable serial communication systems.

For engineers reviewing the TRSF3223EIRGWR datasheet, TRSF3223EIRGWR pinout, TRSF3223EIRGWR application, or TRSF3223EIRGWR equivalent, key selection considerations include its VQFN-20 (RGW) package thermal performance (R_θJA = 32.2°C/W), INVALID output for RS-232 signal presence detection, and flexible power management via FORCEON/FORCEOFF control pins.

Technical Context

The TRSF3223EIRGWR implements two independent RS-232 drivers and receivers with integrated charge-pump voltage converters generating ±V_CC-derived rails (V⁺, V⁻) using four 0.1-μF external capacitors. Its auto-powerdown logic monitors receiver inputs and disables drivers when no valid RS-232 signal (±2.7 V threshold) is detected for >30 μs, reducing ICC to 1 μA.

Receiver input hysteresis is 0.5 V, with V_IT+ = 1.6–2.4 V and V_IT− = 0.6–1.4 V across 3.3-V/5-V supplies; the INVALID output asserts high when any RIN exceeds ±2.7 V or transitions through 0 V in <30 μs, providing real-time bus activity indication.

Key Specifications

Pinout & Package

VQFN-20 (RGW) package with 5 mm × 5 mm body, 0.65-mm pitch, and exposed thermal pad (pin 20 = GND). Designed for low-inductance ground connection and improved thermal performance (R_θJB = 11.5°C/W).

Key Features

Applications

Equivalent & Alternatives

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

Compared with MAX3223ESE+ and SP3223EBET-L, TRSF3223EIRGWR delivers superior thermal performance in a smaller VQFN package, includes the INVALID output for autonomous wake-up, and guarantees full ±15-kV IEC 61000-4-2 contact discharge protection-critical for portable and medical applications.

Availability

TRSF3223EIRGWR is available at Aetrix Electronics and suitable for industrial serial terminals, medical handheld diagnostics, and ruggedized field tablets requiring stable component supply, guaranteed long-term availability, and RoHS-compliant VQFN packaging.

Supply support for TRSF3223EIRGWR 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 connectivity technologies with over 90 years of innovation in industrial, automotive, and communications markets.

The TRSF3223EIRGWR belongs to TI's RS-232 transceiver product line, engineered for low-power, high-ESD robustness serial interfaces in space-constrained portable and battery-operated systems.

FAQ

What is the maximum data rate supported by the TRSF3223EIRGWR?

The TRSF3223EIRGWR supports a maximum data rate of 1000 kbit/s under recommended operating conditions (V_CC = 3 V–4.5 V, C_L = 250 pF). At 1000 pF load capacitance and V_CC = 4.5 V–5.5 V, it maintains full 1000 kbit/s capability. This enables reliable high-speed communication in modern serial peripherals without signal degradation.

How does the INVALID output function on the TRSF3223EIRGWR?

The INVALID output on the TRSF3223EIRGWR is an open-drain indicator that goes high when any receiver input (RIN1 or RIN2) exceeds ±2.7 V or transitions through 0 V in less than 30 μs-signaling valid RS-232 activity. It remains low if inputs stay within −0.3 V to +0.3 V for >30 μs. This allows host MCUs to detect bus activity and wake from low-power states without polling.

Can the TRSF3223EIRGWR operate with a 3.3-V supply while accepting 5-V logic inputs?

Yes, the TRSF3223EIRGWR accepts 5-V logic inputs (DIN1, DIN2, EN, FORCEON, FORCEOFF) when powered from a 3.3-V V_CC supply. Its input structure is designed for 5-V tolerant operation across the full 3-V to 5.5-V supply range, enabling seamless interfacing with mixed-voltage systems without level shifters.

What external components are required for TRSF3223EIRGWR operation?

The TRSF3223EIRGWR requires four 0.1-μF ceramic capacitors (C1+, C1−, C2+, C2−) for charge-pump operation, plus a minimum 1-μF capacitor between V_CC and GND to meet IEC 61000-4-2 ±15-kV ESD specifications. No additional voltage regulators or discrete level shifters are needed due to its integrated dual charge-pump architecture.

What is the thermal performance advantage of the VQFN-20 (RGW) package used in TRSF3223EIRGWR?

The TRSF3223EIRGWR's VQFN-20 (RGW) package delivers R_θJA = 32.2°C/W and R_θJB = 11.5°C/W-significantly lower than SOIC (76.8°C/W) or TSSOP (89.7°C/W) alternatives. Its exposed thermal pad enables efficient heat transfer to the PCB, allowing sustained 1000 kbit/s operation in compact, sealed enclosures without forced airflow.