NXP Semiconductors 74HC151D,118

Overview

74HC151D,118 from NXP Semiconductors is an 8-input CMOS multiplexer in SO16 package, featuring complementary outputs (Y and Y), active-low enable (E), and three binary select inputs (S0–S2). It routes one of eight data inputs (I0–I7) to Y/Y based on select code, with guaranteed operation from −40 °C to +125 °C and supply voltage range 2.0–6.0 V. Used in digital logic routing, address decoding, and data path selection in industrial control and instrumentation systems.

For engineers reviewing the 74HC151D,118 datasheet, 74HC151D,118 pinout, 74HC151D,118 application, or 74HC151D,118 equivalent, key selection criteria include input compatibility (CMOS-level), propagation delay (15–51 ns at VCC = 4.5–6.0 V), output drive capability (±4 mA), ESD robustness (HBM >2000 V), and SO16 thermal performance (500 mW max at Tamb ≤70 °C).

Technical Context

The 74HC151D,118 implements a standard 8:1 data selector using static CMOS logic, with non-inverting signal path from selected input to Y and inverting path to Y. Its enable input (Pin 7) forces both outputs to fixed states (Y = LOW, Y = HIGH) when asserted HIGH, providing synchronous gating independent of select lines.

All inputs include clamp diodes for overvoltage protection, allowing interface to signals exceeding VCC when used with current-limiting resistors. The device complies with JEDEC Std 7A and supports mixed-voltage system interfacing within its specified VI/VO ranges.

Key Specifications

Pinout & Package

74HC151D,118 is housed in a plastic small outline package (SO16, SOT109-1) with 16 leads, 3.9 mm body width, and gull-wing lead form. Pin pitch is 1.27 mm; package conforms to JEDEC MS-012.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HCT151D,118 and SN74LS151N, the 74HC151D,118 delivers optimal balance of wide supply range (2–6 V), low power (<160 μA), and SO16 thermal performance - making it the preferred choice for modern mixed-voltage embedded systems requiring long-term reliability and design flexibility.

Availability

74HC151D,118 is available at Aetrix Electronics and suitable for industrial automation, test equipment, and embedded control applications requiring stable component supply, extended temperature support, and RoHS-compliant packaging.

Supply support for 74HC151D,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

NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with core expertise in logic, RF, and microcontroller technologies.

The 74HC151D,118 belongs to NXP's legacy 74HC logic family, designed for high-noise-immunity, low-power digital signal routing in space-constrained industrial and instrumentation systems.

FAQ

What is the maximum operating frequency supported by the 74HC151D,118?

The 74HC151D,118 does not specify a maximum clock or toggle frequency in its datasheet. Its usable speed is determined by propagation delay: at VCC = 6.0 V and CL = 50 pF, tpd(In→Y) is 15–29 ns (typ–max), supporting reliable data selection in digital paths up to ~30 MHz. System-level timing must account for setup/hold margins relative to select and enable edges.

Can the 74HC151D,118 operate with a 3.3 V supply?

Yes, the 74HC151D,118 is fully specified for VCC = 2.0–6.0 V, including 3.3 V operation. At VCC = 3.3 V, VIH(min) ≈ 2.31 V and VIL(max) ≈ 1.0 V (interpolated from 2.0 V and 4.5 V data), ensuring compatibility with standard 3.3 V CMOS outputs. Propagation delay increases to ~25–40 ns versus 15–29 ns at 6.0 V.

Does the 74HC151D,118 have internal pull-up or pull-down resistors on its inputs?

No, the 74HC151D,118 has no internal pull-up or pull-down resistors on any input (I0–I7, S0–S2, or E). All inputs are high-impedance CMOS and require externally defined logic states - either driven actively or terminated with external resistors to VCC or GND to prevent floating conditions and undefined outputs.

How does the enable input (E) affect output behavior in the 74HC151D,118?

In the 74HC151D,118, the enable input (Pin 7) is active-HIGH. When E = HIGH, Y is forced LOW and Y is forced HIGH regardless of S0–S2 or I0–I7 states. When E = LOW, normal multiplexing occurs: the selected input appears at Y, and its inverse at Y. This provides unconditional output override for system reset or standby modes.

Is the 74HC151D,118 pin-compatible with the 74HCT151D,118?

Yes, the 74HC151D,118 and 74HCT151D,118 share identical SO16 pinout, pin functions, and mechanical footprint (SOT109-1). They differ only in input threshold specifications: 74HC151D,118 requires CMOS-level inputs, while 74HCT151D,118 accepts TTL-level inputs. Substitution is electrically safe but may affect noise margin in mixed-signal environments.