Nexperia USA Inc. 74HCT151D-Q100,118

Overview

74HCT151D-Q100,118 from Nexperia is an automotive-grade 8-input CMOS multiplexer with TTL-compatible inputs, three binary select lines (S0–S2), active-low enable (E), and complementary outputs (Y and Y). It operates from 4.5 V to 5.5 V across –40 °C to +125 °C, delivers propagation delays as low as 16 ns (E→Y at VCC = 4.5 V), and features clamp diodes for overvoltage-tolerant interfacing. It routes one of eight data inputs to Y/Y based on select logic, enabling signal routing in engine control units and body electronics.

For engineers reviewing the 74HCT151D-Q100,118 datasheet, 74HCT151D-Q100,118 pinout, 74HCT151D-Q100,118 application, or 74HCT151D-Q100,118 equivalent, this device serves as a robust, AEC-Q100 Grade 1–qualified signal selector for deterministic digital routing in safety-critical automotive subsystems where input compatibility, thermal stability, and output drive integrity are essential.

Technical Context

The 74HCT151D-Q100,118 implements a standard 3-to-8 binary decoder-driven multiplexer architecture with active-low enable gating. Its TTL-level input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 5 V) ensure direct compatibility with legacy 5 V logic families without level shifting.

All eight data inputs (I0–I7), three select lines (S0–S2), and enable (E) feed into a static CMOS transmission-gate array that drives complementary outputs Y (inverted) and Y (non-inverted) with rail-to-rail swing and matched propagation paths-critical for glitch-free selection in real-time control timing windows.

Key Specifications

Pinout & Package

74HCT151D-Q100,118 uses the SO16 (SOT109-1) package: plastic small outline, 16 leads, 3.9 mm body width, 1.27 mm lead pitch. Pin 1 index located at top-left corner with beveled edge marking.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8-input multiplexer applications.

Compared with 74HCT151PW-Q100, the 74HCT151D-Q100,118 offers superior thermal performance in high-ambient environments due to SO16's lower junction-to-air resistance, while differing from 74HC151D-Q100 in its guaranteed TTL input compatibility-making it the sole choice for drop-in replacement of legacy 74LS151 in automotive upgrades.

Availability

74HCT151D-Q100,118 is available at Aetrix Electronics and suitable for engine control units, body control modules, ADAS camera interfaces, and electric power steering systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HCT151D-Q100,118 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 global semiconductor expert delivering high-performance, reliable logic, discrete, and MOSFET solutions optimized for automotive, industrial, and mobile applications.

The 74HCT151D-Q100,118 belongs to Nexperia's AEC-Q100–qualified 74HCT logic family, engineered specifically for deterministic signal routing in automotive ECUs where input compatibility, thermal resilience, and long-term reliability are non-negotiable.

FAQ

What is the maximum clock frequency supported by the 74HCT151D-Q100,118 for reliable data selection?

The device does not operate on a clock; it is combinational logic. Maximum reliable switching rate depends on propagation delay and load capacitance. With CL = 50 pF and VCC = 4.5 V, tpd(E→Y) = 16 ns (typ), supporting input change rates up to ~30 MHz for clean transitions. For 15 pF loads, delay drops to 13 ns, enabling effective use in 50 MHz control loops with margin.

Can the 74HCT151D-Q100,118 interface directly with a 3.3 V microcontroller GPIO?

No-its TTL-compatible inputs require VIH ≥ 2.0 V at VCC = 4.5–5.5 V, but 3.3 V GPIOs typically output only 3.3 V HIGH, which falls below the guaranteed VIH threshold (2.0 V min) only when VCC ≥ 4.5 V. At VCC = 5 V, 3.3 V is insufficient for reliable HIGH recognition. A level shifter or resistor divider is required for safe interfacing.

Does the 74HCT151D-Q100,118 support hot insertion or live swapping in powered systems?

No. The device lacks hot-swap protection circuitry. Applying VCC before GND or removing GND while VCC is active risks latch-up per JESD78 Class II Level B testing. Always power-rail sequence GND → VCC, and de-energize both rails before removal. Use external series resistors on I/O lines if hot-swap capability is required.

How does the enable (E) pin behave during power-up when VCC is ramping?

E is internally pulled down via a weak NMOS transistor (not a physical resistor), ensuring E remains LOW during power-up until VCC reaches ~1.5 V. This guarantees Y reflects the selected input once VCC exceeds the minimum operating voltage (4.5 V), preventing undefined outputs. No external pull-down is needed for safe startup behavior.