Nexperia USA Inc. 74HC7541D,112

Overview

74HC7541D,112 from Nexperia is an octal Schmitt-trigger buffer/line driver with 3-state outputs, dual active-low output enables (OE1, OE2), and CMOS-level inputs. It operates from 2.0 V to 6.0 V, delivers jitter-free signal conditioning for slow-rising inputs, and supports industrial temperature range (−40 °C to +125 °C) in SO20 package. Used in bus interface and noise-prone sensor signal conditioning circuits.

For engineers reviewing the 74HC7541D,112 datasheet, 74HC7541D,112 pinout, 74HC7541D,112 application, or 74HC7541D,112 equivalent, key selection criteria include Schmitt-trigger hysteresis (0.3–0.5 V), propagation delay (11–36 ns at VCC = 4.5–6.0 V), 3-state enable/disable timing, input clamp diode support for overvoltage-tolerant interfacing, and SO20 thermal derating (12.3 mW/K above 109 °C).

Technical Context

This device implements dual independent 3-state control logic: both OE1 and OE2 must be LOW to enable non-inverting outputs; either HIGH forces all eight Yn outputs into high-impedance state. Its Schmitt-trigger inputs provide 0.3–0.5 V hysteresis (VH), with VT+ = 4.2 V and VT− = 1.8 V at VCC = 6.0 V, enabling reliable noise rejection on slow analog-like digital signals.

The SO20 package (SOT163-1) integrates input clamp diodes allowing current-limiting resistor interfacing to voltages exceeding VCC, and meets JESD78 Class II Level B latch-up immunity (>100 mA). Static supply current is ≤160 μA over full temperature range, supporting low-power system-level buffering.

Key Specifications

Pinout & Package

Package: SO20 (SOT163-1), plastic small outline, 20-pin, 7.5 mm body width, 1.27 mm pitch.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal Schmitt-trigger buffer applications.

Compared with 74HC7541D,112, the 74HCT7541D,112 offers guaranteed TTL input compatibility at 5 V but sacrifices some noise margin below 4.5 V; the SN74LVTH162244DGGR provides double the width but removes Schmitt functionality, requiring external RC networks for noise-prone environments.

Availability

74HC7541D,112 is available at Aetrix Electronics and suitable for industrial bus interface, sensor signal conditioning, legacy system glue logic, and test equipment digital I/O expansion requiring stable component supply across extended temperature ranges.

Supply support for 74HC7541D,112 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 discrete, logic, and MOSFET devices optimized for efficiency-critical applications.

The 74HC7541 belongs to Nexperia's HC logic family, designed for low-power, wide-voltage-range buffering and signal conditioning in industrial, automotive, and consumer systems where noise immunity and supply flexibility are essential.

FAQ

Can 74HC7541D,112 interface directly with 12 V sensors?

Yes - its integrated input clamp diodes allow safe connection to voltages up to VCC + 0.5 V. With a 10 kΩ series resistor and VCC = 5 V, it tolerates sustained 12 V inputs while limiting clamp current to <0.7 mA, well within the ±20 mA absolute maximum rating.

What is the minimum recommended VCC for guaranteed Schmitt-trigger operation?

The datasheet specifies Schmitt thresholds down to VCC = 2.0 V: VT+ = 1.9 V and VT− = 0.1 V at that rail. Hysteresis remains functional (≥0.1 V) across the full 2.0–6.0 V range, enabling reliable noise rejection even in battery-powered 2.5 V systems.

How does dual OE control improve bus arbitration compared to single-OE buffers?

OE1 and OE2 act as logically OR'd enables: asserting either disables all outputs. This allows hierarchical control - e.g., OE1 tied to system reset (global disable), OE2 driven by local controller (selective enable), preventing bus contention during power-up or fault recovery without additional logic gates.

Is thermal derating required for continuous operation at +125 °C ambient?

Yes - the SO20 package (SOT163-1) derates total power dissipation linearly at 12.3 mW/K above 109 °C. At +125 °C ambient, maximum allowed Ptot drops to 500 mW − (12.3 mW/K × 16 K) = 303 mW, requiring careful layout and load current limitation to avoid junction overheating.