Renesas 74HC157FP-E

Overview

74HC157FP-E from Renesas Electronics is a quad 2-to-1-line data selector/multiplexer with noninverted outputs, designed for digital signal routing in logic control and data path management. It operates across 2–6 V supply, delivers 12 ns typical propagation delay (CL = 50 pF), supports fanout of 10 LSTTL loads, and features low quiescent current (4 µA max at 25°C). It is used in address/data bus selection, function generator control, and digital test equipment.

For engineers reviewing the 74HC157FP-E datasheet, 74HC157FP-E pinout, 74HC157FP-E application, or 74HC157FP-E equivalent, key selection criteria include its SOP-16 JEITA package, strobe-enabled output enable logic, single-select decoding architecture, and guaranteed operation from –40°C to +85°C.

Technical Context

The 74HC157FP-E integrates four independent 2-input multiplexers sharing common Select and Strobe inputs. When Strobe is low, outputs Y1–Y4 reflect selected A/B inputs per the Select state; when Strobe is high, all outputs are forced low - enabling synchronous enable/disable of the entire mux bank.

Internal select decoding eliminates external logic for input routing, and the device uses standard high-speed CMOS technology with TTL-compatible input thresholds (VIH = 3.15 V min at VCC = 4.5 V, VIL = 1.35 V max), ensuring interoperability with legacy 74LS and modern mixed-voltage systems.

Key Specifications

Pinout & Package

SOP-16 package (JEITA standard PRSP0016DH-B, FP-16DAV footprint), 5.5 mm × 10.06 mm body, 1.27 mm pitch, gull-wing leads, Ni/Pd/Au plating.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad 2-to-1 multiplexer applications.

Compared with SN74HC157DR and 74AHC157PW, the 74HC157FP-E offers tighter quiescent current control for ultra-low-power industrial monitoring, JEITA-standard SOP packaging for consistent assembly yield, and full 2–6 V operation supporting legacy 5 V and emerging 3.3 V mixed-rail systems without voltage translation.

Availability

74HC157FP-E is available at Aetrix Electronics and suitable for programmable logic control, digital test equipment, industrial bus interface, embedded function generation, and sensor signal routing requiring stable component supply and long-term industrial lifecycle support.

Supply support for 74HC157FP-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 delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, and enterprise applications.

The 74HC157FP-E belongs to Renesas' legacy HD74HC logic family, designed specifically for robust, pin-compatible replacement of 74LS-series devices in industrial control, instrumentation, and legacy system upgrades.

FAQ

What is the maximum operating supply voltage for the 74HC157FP-E?

The 74HC157FP-E supports a maximum supply voltage of 6.0 V, with absolute maximum rating up to +7.0 V. Operation beyond 6.0 V violates recommended conditions and risks parametric degradation or latch-up. The device is fully specified from 2.0 V to 6.0 V, making it compatible with both 3.3 V and 5 V logic systems without level-shifting circuitry. Always observe derating guidelines per Renesas' recommended operating conditions when designing for long-term reliability.

Does the 74HC157FP-E support true three-state outputs?

No, the 74HC157FP-E does not provide three-state (high-impedance) outputs. Its Strobe input forces all Y outputs to a defined logic low state when high - not high-impedance. This active-low enable behavior differs from tri-state buffers and requires external pull-up resistors or downstream gating if bus contention must be avoided. The 74HC157FP-E is intended for point-to-point or wired-OR configurations where outputs drive dedicated loads, not shared busses requiring high-Z isolation.

What is the function of Pin 9 (Strobe) on the 74HC157FP-E?

Pin 9 (Strobe) on the 74HC157FP-E acts as a global output enable/disable control. When Strobe is low (L), the device performs normal 2-to-1 multiplexing: outputs Y1–Y4 reflect the selected A or B inputs per the Select input state. When Strobe is high (H), all four outputs are forced to logic low regardless of Select or input states. This provides synchronous blanking capability useful for timing-critical arbitration, test mode insertion, or power-gated operation - distinct from individual channel enable schemes.

Can the 74HC157FP-E operate reliably at –40°C?

Yes, the 74HC157FP-E is fully characterized and guaranteed to operate across –40°C to +85°C, meeting industrial temperature grade requirements. All electrical specifications - including propagation delay, VOH/VOL, and input thresholds - are validated over this full range per Renesas' Recommended Operating Conditions. No derating or special layout is required for cold-start operation in outdoor or unheated industrial environments, provided VCC remains within 2–6 V and load capacitance stays ≤50 pF.

Is the 74HC157FP-E pin-compatible with the 74HC158?

No, the 74HC157FP-E is not pin-compatible with the 74HC158. Although both share identical pinouts and package footprints, the 74HC158 features inverted outputs (Y = NOT(A or B)), while the 74HC157FP-E provides noninverted outputs (Y = A or B). Swapping them without logic inversion in the system will cause functional failure. The 74HC157FP-E and 74HC158 are functionally complementary - not drop-in replacements - and require matching downstream logic polarity or redesign of the output interface.