Renesas 74HC151FPEL-E

Overview

74HC151FPEL-E from Renesas is a high-speed 1-of-8-line data selector/multiplexer in SOP-16 package, operating from 2 V to 6 V, with true (Y) and complement (W) outputs, 18 ns typical propagation delay (CL = 50 pF), and low quiescent current (4 µA max at 25°C). It enables digital signal routing in address-decoded logic systems.

For engineers reviewing the 74HC151FPEL-E datasheet, 74HC151FPEL-E pinout, 74HC151FPEL-E application, or 74HC151FPEL-E equivalent, this page delivers verified functional behavior, validated pin roles, real-world timing constraints, and precise substitution guidance for logic-level multiplexing in industrial control and embedded interface design.

Technical Context

The 74HC151FPEL-E implements combinational logic selection using three address inputs (A, B, C) to route one of eight data inputs (D0–D7) to the Y output, while simultaneously providing its logical inverse at W. Strobe (S) acts as an active-low enable: S = H forces Y = L and W = H regardless of address or data states.

Its CMOS architecture ensures rail-to-rail output swing, input thresholds referenced to VCC (VIH ≥ 3.15 V at VCC = 4.5 V; VIL ≤ 1.35 V), and compatibility with both HC and standard LS-TTL loads (fanout of 10 LSTTL). Propagation delays vary by path: D-to-Y (30 ns max at 6 V), A/B/C-to-Y (35 ns max), and S-to-Y (25 ns max).

Key Specifications

Pinout & Package

SOP-16 package (JEITA PRSP0016DH-B, FP-16DAV), 1.27 mm pitch, 5.5 mm × 10.06 mm body, Ni/Pd/Au-plated leads, tape-and-reel packaging (2,000 pcs/reel).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar 1-of-8 multiplexer applications.

Compared with SN74HC151DR and MC74HC151AFEL, the 74HC151FPEL-E offers identical core functionality but distinguishes itself via Renesas' JEITA-compliant FP-16DAV footprint and tighter 4 µA max ICC spec - advantageous in battery-critical or thermally constrained industrial edge nodes.

Availability

74HC151FPEL-E is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, embedded microcontroller peripheral multiplexing, and digital test equipment signal routing requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.

Supply support for 74HC151FPEL-E 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

Renesas Electronics Corporation is a global semiconductor leader specializing in microcontrollers, analog, power, and SoC solutions for automotive, industrial, and enterprise applications.

The HD74HC151 product line delivers standardized high-speed CMOS logic devices optimized for robustness, low power, and interoperability across mixed-voltage digital systems - targeting industrial control, instrumentation, and legacy interface bridging.

FAQ

What is the maximum operating frequency supported by the 74HC151FPEL-E?

The 74HC151FPEL-E does not operate on a clock; it is a combinational logic device. Its usable data rate depends on propagation delay: with 30 ns max tpd (D→Y at VCC = 6 V), it supports reliable switching up to approximately 25 MHz in cascaded or feedback-constrained paths. Real-world throughput is governed by address setup/hold timing relative to strobe assertion, not a clock frequency specification.

Can the 74HC151FPEL-E drive standard TTL loads directly?

Yes, the 74HC151FPEL-E provides a fanout of 10 LSTTL loads due to its ±4 mA output drive capability at VCC = 4.5 V. This meets standard TTL input current requirements (IIH = 40 µA, IIL = –1.6 mA), allowing direct connection without buffer stages in mixed-logic systems.

Is the strobe (S) input internally pulled up or down in the 74HC151FPEL-E?

No, the strobe (S) input of the 74HC151FPEL-E has no internal pull-up or pull-down resistor. It is a standard CMOS input requiring explicit logic-level control: S must be actively driven low to enable data selection, and held high to force Y = L and W = H. External pull-up/pull-down is required only if floating-state prevention is needed in system reset conditions.

Does the 74HC151FPEL-E support 3.3 V-only operation without level shifting?

Yes, the 74HC151FPEL-E operates reliably at VCC = 3.3 V, with guaranteed VIH = 2.31 V min and VIL = 1.09 V max (derived from 70%/30% VCC thresholds), providing 0.6 V noise margin. Its outputs swing rail-to-rail, making it compatible with 3.3 V LVTTL and LVCMOS interfaces without translation.

How does the 74HC151FPEL-E behave when the strobe input is left unconnected?

If the strobe (S) input of the 74HC151FPEL-E is left unconnected, it floats to an indeterminate voltage, potentially causing metastability, increased ICC, or oscillatory output behavior. The device will not guarantee Y or W states. Always tie S to a defined logic level - typically pulled low via MCU GPIO or hardwired to GND in permanently enabled configurations.