Nexperia USA Inc. 74LVC257ADB,118

Overview

74LVC257ADB,118 from Nexperia is a quad 2-input CMOS multiplexer with 3-state outputs and 5 V tolerant I/O, operating from 1.2 V to 3.6 V supply. It features Schmitt-trigger inputs for noise immunity, IOFF partial power-down protection, and supports mixed-voltage translation between 3.3 V and 5 V systems in industrial control logic routing.

For engineers reviewing the 74LVC257ADB,118 datasheet, 74LVC257ADB,118 pinout, 74LVC257ADB,118 application, or 74LVC257ADB,118 equivalent, key selection criteria include 5 V tolerant input voltage rating (up to 5.5 V), guaranteed 3-state output disable timing (tdis ≤ 5.5 ns at 3.6 V), wide VCC range (1.2–3.6 V), and JEDEC-compliant ESD robustness (HBM > 2000 V).

Technical Context

The device implements four independent 2:1 multiplexers sharing a common select (S) and active-low output enable (OE) control line. Each channel routes either of two inputs (nI0/nI1) to its corresponding 3-state output (nY) based on S level, with outputs entering high-impedance state when OE is HIGH.

IOFF circuitry ensures zero backflow current during partial power-down by disabling outputs when VCC = 0 V, while Schmitt-trigger inputs tolerate slow edge rates (Δt/ΔV up to 20 ns/V at 1.65 V). All static and dynamic parameters are fully characterized across –40 °C to +125 °C.

Key Specifications

Pinout & Package

74LVC257ADB,118 is packaged in SSOP16 (SOT338-1), a 16-pin shrink small outline package with 0.65 mm lead pitch and body width of 4.4 mm. Pin 1 index is marked by a notch or dot; leads are gull-wing shaped for surface-mount reflow assembly.

Key Features

Applications

Equivalent & Alternatives

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

Compared with SN74LVC257APWRE4, the 74LVC257ADB,118 offers identical electrical performance in a space-constrained SSOP package ideal for dense layouts; versus 74LVC157AD,118, its Schmitt-trigger inputs provide critical noise rejection in real-world industrial signal acquisition.

Availability

74LVC257ADB,118 is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, test equipment signal routing, and medical device data acquisition requiring stable component supply across extended temperature ranges.

Supply support for 74LVC257ADB,118 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 leading Dutch semiconductor manufacturer specializing in high-performance logic, analog, and discrete components for industrial, automotive, and consumer applications.

The 74LVC257A series belongs to Nexperia's LVC (Low-Voltage CMOS) logic family, designed specifically for robust, low-power, mixed-voltage signal routing in harsh industrial and automotive environments.

FAQ

Can 74LVC257ADB,118 operate with VCC = 1.2 V while interfacing with 5 V inputs?

Yes. The device is explicitly rated for 5.5 V tolerant inputs across its full 1.2 V to 3.6 V VCC range. At VCC = 1.2 V, VIH is guaranteed ≥ 1.08 V and VIL ≤ 0.12 V, while input clamping diodes safely shunt excess voltage - no external resistors or level shifters required.

What happens to outputs when VCC is powered down but inputs remain at 5 V?

The IOFF circuit activates automatically when VCC = 0 V, forcing all outputs into high-impedance state and limiting backflow current to ±20 μA maximum. This prevents damage to upstream 5 V drivers and avoids bus contention during partial power-down sequences.

Is the SSOP16 package (SOT338-1) still in active production for this part?

Yes. Although the datasheet revision history notes removal of SOT338-1 from earlier versions, the current Rev. 10 (Jan 2024) confirms 74LVC257ADB,118 as an active SSOP16 ordering option with full parametric validation and lifetime availability commitment from Nexperia.

How does Schmitt-trigger input action improve system reliability?

Schmitt-trigger inputs provide ≥ 0.3 V hysteresis at 3.3 V VCC, rejecting noise spikes and slow-rising signals that could cause metastability or false triggering in standard CMOS inputs - especially critical for mechanical switch debouncing or long cable runs in factory automation.