Texas Instruments CLVC541AQPWRG4Q1

Overview

CLVC541AQPWRG4Q1 from Texas Instruments is an automotive-qualified octal buffer/driver with 3-state outputs, designed for 2 V to 3.6 V V_CC operation. It features dual active-low output-enable inputs (OE1/OE2), supports mixed-mode 5-V input/3.3-V V_CC operation, delivers 5.1 ns max propagation delay at 3.3 V, and provides I_off support for partial-power-down mode - ideal for bus driving and memory address buffering in automotive control modules.

For engineers reviewing the CLVC541AQPWRG4Q1 datasheet, CLVC541AQPWRG4Q1 pinout, CLVC541AQPWRG4Q1 application, or CLVC541AQPWRG4Q1 equivalent, key selection considerations include its AEC-Q100 Grade 1 qualification (-40°C to +125°C), 20-pin TSSOP (PW) package, 3-state timing behavior (t_en = 7.0 ns, t_dis = 7.0 ns), and compatibility with 5-V-tolerant inputs in 3.3-V systems.

Technical Context

The CLVC541AQPWRG4Q1 implements eight noninverting buffers with independent 3-state control via a dual-input AND gate (OE1 and OE2, both active-low). When either OE is high, all Y outputs enter high-impedance state - enabling shared-bus arbitration. Its I_off circuitry prevents backflow current during partial power-down, satisfying automotive system-level safety requirements.

Input voltage tolerance extends to 5.5 V regardless of V_CC, allowing direct interfacing with legacy 5-V logic while operating at 3.3 V. Output drive strength is ±24 mA at V_CC = 3 V, with guaranteed VOL ≤ 0.55 V and VOH ≥ 2.2 V under load - ensuring noise margin compliance in noisy automotive environments.

Key Specifications

Pinout & Package

TSSOP-20 (PW) package: 6.5 mm × 4.4 mm, 1.2 mm max height, lead pitch 0.65 mm, RoHS-compliant NiPdAu finish, MSL Level-1.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal buffer applications.

Compared with SN74LVC541AQPWRQ1, CLVC541AQPWRG4Q1 adds enhanced test screening for mission-critical automotive functions; compared with SN74LVC541ADGSRQ1, it trades smaller size for better thermal performance and mechanical reliability in high-vibration environments.

Availability

CLVC541AQPWRG4Q1 is available at Aetrix Electronics and suitable for engine control units, body control modules, and ADAS domain controllers requiring stable component supply across extended automotive product lifecycles.

Supply support for CLVC541AQPWRG4Q1 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-grade ICs, with over 50 years of automotive electronics experience and ISO/TS 16949-certified manufacturing.

The SN74LVC541A-Q1 product line delivers AEC-Q100-qualified logic devices optimized for signal integrity, power efficiency, and functional safety in automotive electronic control units - from powertrain to infotainment.

FAQ

What is the maximum input voltage CLVC541AQPWRG4Q1 supports while operating at 3.3 V V_CC?

The CLVC541AQPWRG4Q1 supports input voltages up to 5.5 V regardless of V_CC level. This allows direct interfacing with 5-V logic families such as TTL or older microcontrollers without external level shifters. The specification is verified across the full operating temperature range (–40°C to +125°C) and is explicitly stated in the Absolute Maximum Ratings table of the official datasheet.

Does CLVC541AQPWRG4Q1 support partial power-down, and how is it implemented?

Yes, CLVC541AQPWRG4Q1 supports partial power-down via its I_off circuitry. When V_CC = 0 V, the outputs are automatically disabled to prevent damaging current backflow from live inputs into the unpowered device. This feature is fully characterized and guaranteed per AEC-Q100 stress testing, making CLVC541AQPWRG4Q1 suitable for automotive systems with staggered power sequencing.

What is the function of the dual OE inputs (OE1 and OE2) on CLVC541AQPWRG4Q1?

The OE1 and OE2 pins form a 2-input AND gate with active-low logic: both must be low for the Y outputs to be enabled. If either OE1 or OE2 is high, all eight outputs enter high-impedance state. This architecture enables flexible bus arbitration - for example, OE1 can be controlled by a master CPU while OE2 responds to a watchdog timeout signal, providing hardware-level fail-safe isolation in CLVC541AQPWRG4Q1-based systems.

Is CLVC541AQPWRG4Q1 pin-compatible with standard SN74LVC541A variants?

Yes, CLVC541AQPWRG4Q1 uses the same TSSOP-20 (PW) package and identical pinout as SN74LVC541AQPWRQ1 and SN74LVC541AQPWRQ1.B. All signal, power, and ground assignments match exactly - including OE1 (pin 1), A1 (pin 2), Y1 (pin 11), GND (pin 10), and V_CC (pin 20). No PCB redesign is needed when upgrading to the G4-screened version of CLVC541AQPWRG4Q1.

What thermal performance can be expected from CLVC541AQPWRG4Q1 in a typical automotive PCB layout?

In standard 2-layer automotive PCBs with 1 oz copper and minimal thermal vias, CLVC541AQPWRG4Q1 exhibits a θ_JA of 83°C/W (per JEDEC JESD51-7). At 24 mA per output and worst-case 3.6 V V_CC, total power dissipation remains below 150 mW - resulting in <13°C junction-to-ambient rise. TI recommends using the exposed pad variant (not applicable to PW package) for higher-power applications; the TSSOP package relies on trace conduction and ambient airflow.