Nexperia USA Inc. 74HCT151PW,118

Overview

74HCT151PW,118 from Nexperia is a TTL-level-compatible 8-input digital multiplexer in TSSOP16 package, featuring complementary Y/Y outputs, active-low enable (E), and three binary select inputs (S0–S2) for routing one of eight data inputs (I0–I7). It operates from 4.5 V to 5.5 V, supports -40 °C to +125 °C industrial temperature range, and delivers 22 ns typical propagation delay (In→Y) at VCC = 4.5 V with CL = 50 pF - used in address/data routing, signal selection, and logic state consolidation in embedded control systems.

For engineers reviewing the 74HCT151PW,118 datasheet, 74HCT151PW,118 pinout, 74HCT151PW,118 application, or 74HCT151PW,118 equivalent, this device serves as a drop-in-selectable signal path controller in legacy TTL-interfaced digital subsystems, requiring precise timing validation, supply voltage compatibility checks, and thermal derating awareness for high-density PCB layouts.

Technical Context

The 74HCT151PW,118 implements a single-pole, 8-throw analog-style switching function using CMOS transistor logic with TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 5 V). Its internal architecture routes selected input through a non-inverting path to Y while simultaneously generating the inverted complement at Y, with E asserting dominant control over output state.

Propagation delays are asymmetrically specified across input types: select-input-to-output (Sn→Y) and enable-to-output (E→Y) paths exhibit 23–25 ns typical delay at 4.5 V, while data-input-to-output (In→Y) is 22 ns - critical for setup/hold timing in synchronous bus arbitration and address decoding applications.

Key Specifications

Pinout & Package

TSSOP16 plastic thin shrink small outline package (SOT403-1), 4.4 mm body width, 0.65 mm lead pitch, 16-terminal surface-mount construction optimized for high-density PCB assembly and thermal performance up to 125 °C ambient.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC151PW,118 and SN74LS151DR, the 74HCT151PW,118 uniquely balances TTL input compatibility, industrial temperature support, and low-power CMOS efficiency - making it optimal for upgrading legacy 5 V systems without redesigning interface logic or thermal management.

Availability

74HCT151PW,118 is available at Aetrix Electronics and suitable for industrial control logic, legacy system bus arbitration, digital test equipment, and automated calibration sequencing requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HCT151PW,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 with focus on efficiency, reliability, and sustainability.

The 74HCT151PW,118 belongs to Nexperia's 74HCT logic family - engineered specifically for seamless integration between TTL-output devices and CMOS-based systems, emphasizing noise immunity, wide operating margins, and industrial-grade qualification.

FAQ

Can 74HCT151PW,118 operate at 3.3 V supply?

No. The 74HCT151PW,118 is specified only for 4.5 V to 5.5 V operation per Table 5. At 3.3 V, input thresholds fall outside TTL-compatibility range (VIH minimum becomes undefined), and output drive capability degrades below specification. Use 74HC151PW,118 for 3.3 V systems.

What is the maximum capacitive load for Y/Y outputs?

The 74HCT151PW,118 is characterized up to 50 pF load capacitance in dynamic specifications (Table 7). Driving >50 pF increases propagation delay nonlinearly and may cause overshoot; for >100 pF loads, add series termination or buffer stage per Figure 6 test circuit guidelines.

Does the enable pin (E) override select inputs asynchronously?

Yes. Pin 13 (E) is asynchronous and dominant: when E = HIGH, Y is forced LOW and Y is forced HIGH regardless of S0–S2 or I0–I7 states. This behavior is confirmed in Table 3 (Function Table) and Section 1 functional description.

Is thermal pad on TSSOP16 package (SOT403-1) required to be soldered?

No. The exposed thermal pad on the bottom of the TSSOP16 package has no electrical function and may remain unsoldered. If soldered, it must be left floating or connected to GND - per SOT403-1 mechanical drawing note and datasheet Section 5.1 pinning details.