Nexperia USA Inc. 74HC7541DB,118

Overview

74HC7541DB,118 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 noisy or slow-rising inputs, and supports industrial temperature range (−40 °C to +125 °C) in SO20 package. Used in bus interface and noise-immune digital signal routing.

For engineers reviewing the 74HC7541DB,118 datasheet, 74HC7541DB,118 pinout, 74HC7541DB,118 application, or 74HC7541DB,118 equivalent, key selection criteria include Schmitt-trigger hysteresis voltage (0.3–0.5 V at VCC = 6.0 V), propagation delay (11–32 ns), 3-state enable/disable timing, input clamping 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: OE1 and OE2 both active-low, enabling simultaneous or selective output disable. Its Schmitt-trigger inputs provide defined switching thresholds (VT+ = 4.2 V, VT− = 1.8 V at VCC = 6.0 V) and 0.3–0.5 V hysteresis to reject noise on slow edges.

The architecture supports non-inverting buffering with unlimited input rise/fall times, clamp diodes on all inputs for current-limited overvoltage tolerance up to VCC + 0.5 V, and rail-to-rail output swing (VOH ≥ 5.2 V, VOL ≤ 0.4 V at VCC = 6.0 V, IO = ±7.8 mA).

Key Specifications

Pinout & Package

74HC7541DB,118 is supplied in SO20 (SOT163-1) plastic small outline package: 20-pin, 7.5 mm body width, 1.27 mm pitch, gull-wing leads. Thermal resistance θJA = 81.3 K/W (JEDEC low-efficiency board).

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC7541DB,118, the 74HC7540DB,118 offers functional equivalence except polarity inversion, while SN74LVTH162244DGGR trades Schmitt noise immunity for higher drive and density - making the former a drop-in replacement for polarity-flexible designs, and the latter a trade-off for speed/density over robustness.

Availability

74HC7541DB,118 is available at Aetrix Electronics and suitable for industrial bus interface, motor control signal conditioning, legacy system bus extension, and test equipment digital I/O buffering requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HC7541DB,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 focused on high-volume, high-reliability logic, analog, and MOSFET solutions, with manufacturing rooted in process excellence and automotive-grade quality systems.

The 74HC7541DB,118 belongs to Nexperia's HC logic family - engineered for robust noise immunity, wide supply flexibility, and industrial temperature resilience in signal integrity-critical digital interface applications.

FAQ

What is the maximum clock frequency supported by the 74HC7541DB,118?

The 74HC7541DB,118 does not operate as a clocked device but as a combinatorial buffer. Its usable signal bandwidth is determined by propagation delay (11–32 ns at VCC = 6.0 V) and transition time (4–15 ns). For clean square-wave transmission, it reliably supports data rates up to ~30 MHz with 50 pF load, assuming proper termination and layout.

Can OE1 and OE2 be tied together for simplified control?

Yes - OE1 and OE2 may be connected to a single control line since both are active-low and electrically identical. Doing so reduces GPIO usage but eliminates independent control of output groups. The datasheet confirms identical electrical characteristics (VIH/VIL, drive strength) for both enables, supporting this configuration without performance penalty.

Does the 74HC7541DB,118 support mixed-voltage operation (e.g., 3.3 V inputs with 5 V VCC)?

No - input voltage limits are referenced to VCC. With VCC = 5 V, inputs must stay within 0 V to 5 V. However, the integrated input clamp diodes allow safe interfacing to voltages up to VCC + 0.5 V (i.e., 5.5 V max) when used with series current-limiting resistors, per Section 7 limiting values and Figure 1 functional diagram notes.

How does the Schmitt-trigger hysteresis improve performance in motor control applications?

In motor control, hall-effect or encoder signals often exhibit slow edges and EMI-induced noise near zero-crossings. The 74HC7541DB,118's 0.3–0.5 V hysteresis prevents multiple output toggles during slow transitions, ensuring one clean edge per magnetic pole passage - directly improving commutation timing accuracy and reducing torque ripple in BLDC drives.