STMicroelectronics 74LX1G04BJR

Overview

74LX1G04BJR 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 - deployed in mixed-voltage logic interfacing and level-shifting circuits within portable and industrial control systems.

For engineers reviewing the 74LX1G04BJR datasheet, 74LX1G04BJR pinout, 74LX1G04BJR application, or 74LX1G04BJR equivalent, key selection criteria include 5V input tolerance in sub-3.3V supply environments, symmetrical output drive strength, power-down protection for hot-swap compatibility, and Flip-Chip4 package thermal and space advantages.

Technical Context

The device implements a three-stage buffered inverter architecture using C2MOS technology, enabling high noise immunity and stable rail-to-rail switching across its full 1.65–5.5 V operating range. Input and output structures incorporate diode clamps and power-down protection, allowing safe operation with inputs up to 7 V regardless of VCC state.

Its propagation delays are balanced (tPLH ≅ tPHL), and output impedance is symmetrical (|IOH| = |IOL| ≥ 24 mA at 3 V), supporting clean signal inversion in timing-critical paths without skew-induced jitter. The 1.2 V data retention capability enables low-power hold states during partial system shutdown.

Key Specifications

Pinout & Package

74LX1G04BJR uses the Flip-Chip4 package (0.65 mm pitch, 1.07 mm × 1.07 mm body), optimized for high-density PCB layouts and improved thermal performance over leaded SOT variants. It features no external leads - interconnects via solder bumps on bottom-side pads.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC1G04DBVR and NC7SZ04P5X, the 74LX1G04BJR uniquely combines Flip-Chip4 miniaturization, full power-down protection, and superior latch-up immunity - making it optimal for space-constrained, mixed-voltage, and hot-swap-capable embedded systems.

Availability

74LX1G04BJR is available at Aetrix Electronics and suitable for industrial PLC I/O modules, portable medical sensor interfaces, and automotive body control units requiring stable component supply, long-term lifecycle support, and consistent Flip-Chip4 packaging.

Supply support for 74LX1G04BJR 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, designing and manufacturing analog, digital, and mixed-signal ICs for automotive, industrial, and consumer applications.

The 74LX series targets low-voltage, high-noise-immunity logic interfacing in mixed-supply systems - emphasizing robustness, power efficiency, and seamless voltage domain bridging.

FAQ

What is the maximum input voltage the 74LX1G04BJR can tolerate when VCC = 0 V?

The 74LX1G04BJR accepts DC input voltages from –0.5 V to +7.0 V regardless of VCC state, including VCC = 0 V. This is enabled by internal diode clamps and power-down protection circuitry, allowing safe connection to live 5 V buses during system power-down or hot-swap events without risk of damage or back-powering.

Does the 74LX1G04BJR support true rail-to-rail output swing?

Yes - the 74LX1G04BJR delivers rail-to-rail CMOS output swing: VOH ≥ VCC – 0.1 V and VOL ≤ 0.1 V under light load (100 µA), and maintains VOH ≥ 2.2 V and VOL ≤ 0.55 V at ±24 mA drive into 3 V supply. Its push-pull output stage ensures full logic-level compliance across its entire operating voltage range.

Can the N.C. pin on the 74LX1G04BJR be grounded or left floating?

The N.C. pin (Pin 1 per top-view marking) is internally unconnected and must remain electrically floating - neither grounded nor tied to any voltage. STMicroelectronics specifies no internal bond wire or circuit connection to this terminal; grounding it may compromise thermal dissipation or introduce parasitic coupling in high-frequency layouts.

Is the 74LX1G04BJR qualified for automotive temperature range?

No - the 74LX1G04BJR is specified for industrial temperature range (–55 °C to +125 °C), not AEC-Q200 automotive qualification. While its extended temperature rating supports under-hood industrial applications, it lacks automotive-specific reliability testing (e.g., HTOL, TC, ESD HBM ≥ 2 kV), and STMicroelectronics does not list it in their automotive-grade product portfolio.