STMicroelectronics 74LX1G04CTR

Overview

74LX1G04CTR from STMicroelectronics is a low-voltage CMOS single inverter with 5V-tolerant inputs, operating from 1.65 V to 5.5 V, delivering 4.2 ns max propagation delay at 3 V, ±24 mA output drive, and 1 µA max quiescent current at 25°C - used for level-shifting and signal inversion in mixed-voltage digital interfaces.

For engineers reviewing the 74LX1G04CTR datasheet, 74LX1G04CTR pinout, 74LX1G04CTR application, or 74LX1G04CTR equivalent, key selection criteria include 5V input tolerance in sub-3.3V systems, symmetrical 24 mA drive capability at 3 V, power-down protection on all I/O, and SOT323-5L package compatibility with space-constrained PCB layouts.

Technical Context

This device implements a three-stage buffered inverter architecture using C2MOS technology, enabling high noise immunity and stable rail-to-rail output swing across its 1.65–5.5 V supply range. Input thresholds scale with VCC (e.g., VIH = 0.7VCC at 3.0–5.5 V), and output impedance is matched for tPLH ≈ tPHL propagation symmetry.

Power-down protection allows safe operation with VCC = 0 V while accepting 0–7 V on inputs/outputs; ESD protection is integrated on all pins per IEC 61000-4-2. The internal structure supports data retention down to 1.2 V, making it suitable for brown-out tolerant logic stages.

Key Specifications

Pinout & Package

SOT323-5L package: 1.8 mm × 2.2 mm × 0.9 mm body, 5-pin surface-mount, lead-free, RoHS-compliant.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar single inverter applications.

Compared with SN74LVC1G04DBVR and NC7SZ04P5X, the 74LX1G04CTR uniquely combines true power-down I/O protection, 1 µA ICC, and validated −55°C to +125°C operation - making it optimal for automotive and industrial systems requiring fail-safe behavior during supply transients.

Availability

74LX1G04CTR is available at Aetrix Electronics and suitable for industrial sensor interfaces, automotive body control modules, and portable medical device power sequencing requiring stable component supply and long-term lifecycle assurance.

Supply support for 74LX1G04CTR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, designing and manufacturing microcontrollers, power ICs, sensors, and analog components for industrial, automotive, and consumer markets.

The 74LX series targets low-voltage, high-speed logic applications in mixed-supply systems, emphasizing 5V tolerance, ultra-low static power, and robustness in harsh electrical environments.

FAQ

Can 74LX1G04CTR be used with VCC = 1.8 V while interfacing to a 5 V microcontroller output?

Yes - its inputs tolerate −0.5 V to +7.0 V regardless of VCC, so a 5 V MCU output can directly drive pin 1 without risk of damage or latch-up. At VCC = 1.8 V, output swing remains rail-to-rail (0 V to 1.8 V), and VOH/VOL meet specifications for driving downstream 1.8 V logic.

Does the N.C. pin (pin 5) require any PCB layout treatment?

No - pin 5 is internally unconnected and electrically isolated. It may be left floating, tied to GND for mechanical reinforcement, or omitted from solder mask design. STMicroelectronics confirms no current flows through this terminal under any operating condition.

What is the maximum capacitive load this inverter can drive while maintaining 4.2 ns propagation delay?

The 4.2 ns max tPD is specified at VCC = 4.5–5.5 V with CL = 50 pF and RL = 500 Ω. Driving >50 pF increases delay nonlinearly; for 100 pF loads, measured tPD exceeds 6.5 ns at 3 V. Use local buffering or reduce trace capacitance for timing-critical paths above 50 pF.

Is 74LX1G04CTR qualified for automotive AEC-Q100 Grade 1?

No - this part is not AEC-Q100 qualified. It is rated for −55°C to +125°C operation and meets industrial reliability standards, but lacks the stress testing, failure analysis, and documentation required for automotive Grade 1 (−40°C to +125°C with zero defects).