Nexperia USA Inc. 74LVC257ABQ,115

Overview

74LVC257ABQ,115 from Nexperia is a quad 2-input 3-state multiplexer IC with 5 V tolerant inputs/outputs, operating across 1.2 V–3.6 V supply, supporting mixed-voltage translation between 3.3 V and 5 V systems. It features Schmitt-trigger inputs for noise immunity, IOFF partial power-down protection, and guaranteed operation from –40 °C to +125 °C. Used in bus multiplexing, signal routing, and level-shifting in industrial control logic.

For engineers reviewing the 74LVC257ABQ,115 datasheet, 74LVC257ABQ,115 pinout, 74LVC257ABQ,115 application, or 74LVC257ABQ,115 equivalent, key selection criteria include 5 V tolerance on all I/O, IOFF-enabled safe power-down behavior, propagation delay ≤6.0 ns at 3.3 V, 3-state output drive capability into 50 Ω transmission lines, and DHVQFN16 thermal-enhanced packaging for high-density PCB layouts.

Technical Context

This device implements four independent 2:1 multiplexers sharing one common select (S) and one active-low 3-state enable (OE). Each channel routes either input I0 or I1 to its corresponding Y output based on S, while OE controls output impedance state (driving or high-Z).

The IOFF circuit ensures outputs remain high-impedance when VCC = 0 V, blocking backflow current during partial power-down. Schmitt-trigger inputs provide hysteresis (typ. 0.2 V) to tolerate slow-rising signals and improve noise margin in noisy environments.

Key Specifications

Pinout & Package

DHVQFN16 package (SOT763-1): 2.5 × 3.5 × 0.85 mm body, no leads, thermally enhanced exposed pad (non-soldered by default), 16 terminals, pin 1 index marked.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad 2-input multiplexer applications.

Compared with SN74LVC257APWRE4 and 74LVC157AD,118, the 74LVC257ABQ,115 delivers superior thermal performance and smallest PCB area due to its DHVQFN16 package, while retaining identical logic behavior, 5 V tolerance, and IOFF functionality - making it optimal for space-constrained, thermally demanding embedded systems.

Availability

74LVC257ABQ,115 is available at Aetrix Electronics and suitable for industrial automation, automotive diagnostics, medical instrumentation, and test equipment requiring stable component supply across extended temperature ranges and mixed-voltage interfaces.

Supply support for 74LVC257ABQ,115 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

Nexperia is a global semiconductor expert delivering high-performance logic, discrete, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in high-volume electronics.

The 74LVC257A belongs to Nexperia's LVC logic family, designed specifically for low-voltage, mixed-signal interfacing in space- and power-constrained applications where voltage translation and robust power-down behavior are critical.

FAQ

What is the maximum input voltage the 74LVC257ABQ,115 can safely accept?

The device accepts input voltages up to 5.5 V regardless of VCC level (1.2 V–3.6 V), as confirmed in Table 4 (Limiting Values) and Table 5 (Recommended Operating Conditions). This 5 V tolerance enables direct connection to legacy 5 V peripherals without external level-shifting circuitry.

Does the 74LVC257ABQ,115 support hot insertion or partial power-down?

Yes - its IOFF circuitry actively disables outputs and limits leakage to ±20 μA when VCC = 0 V, satisfying JEDEC JESD78 requirements for partial power-down. This protects downstream circuitry during hot-swap events or staged power sequencing in modular systems.

How does the Schmitt-trigger input improve system robustness?

Schmitt-trigger action provides input hysteresis (~0.2 V typical), allowing reliable switching even with slow-rising/falling signals (e.g., from RC-filtered sensors or long PCB traces). This eliminates metastability and contact bounce issues in industrial switch interfaces and noisy EMI environments.

Can the 74LVC257ABQ,115 drive 50 Ω transmission lines directly?

Yes - the datasheet specifies "Output drive capability: 50 Ω transmission lines at 85 °C" (Section 2). At VCC = 3.0 V, it delivers ±24 mA, sufficient to drive standard 50 Ω loads with controlled edge rates, reducing need for external line drivers in high-speed digital interconnects.