Nexperia USA Inc. 74HC541D,652

Overview

74HC541D,652 from Nexperia is an octal non-inverting 3-state buffer/line driver in SO20 (SOT163-1) package, operating from 2.0 V to 6.0 V supply, featuring dual active-low output enables (OE1, OE2), CMOS input levels, and guaranteed operation from –40 °C to +125 °C. It drives high-capacitance buses in microcontroller I/O expansion, memory address latching, and industrial control backplanes.

For engineers reviewing the 74HC541D,652 datasheet, 74HC541D,652 pinout, 74HC541D,652 application, or 74HC541D,652 equivalent, key selection criteria include propagation delay (10–35 ns at VCC = 4.5–6.0 V), 3-state enable/disable timing (16–48 ns), output drive strength (±6 mA at VCC = 4.5 V), and SO20 thermal derating (12.3 mW/K above 109 °C).

Technical Context

This device implements eight identical non-inverting buffer circuits with independent input-to-output signal paths and shared 3-state control logic. Its dual OE inputs allow grouped or split bus control - OE1 and OE2 must both be LOW for outputs to drive; either HIGH forces all eight Yn outputs into high-impedance state.

The internal architecture includes input clamp diodes enabling safe interfacing to voltages exceeding VCC when used with current-limiting resistors, and CMOS-level input thresholds (VIH ≥ 3.15 V at VCC = 4.5 V) ensuring compatibility with 3.3 V and 5 V logic families without level translation.

Key Specifications

Pinout & Package

74HC541D,652 uses the SO20 plastic small outline package (SOT163-1), 20-pin, 7.5 mm body width, with standard 1.27 mm pitch and gull-wing leads. Thermal resistance θJA = 82 K/W (JEDEC 2S2P board).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal non-inverting 3-state buffer applications.

Compared with 74HC541D,652, the 74HCT541D,652 offers guaranteed TTL-input compatibility at 5 V while retaining identical packaging and timing - making it the preferred choice for mixed-technology upgrades; SN74LVC541APWR provides superior drive and speed in 3.3 V systems but sacrifices voltage flexibility and overvoltage tolerance.

Availability

74HC541D,652 is available at Aetrix Electronics and suitable for industrial automation controllers, automotive body control modules, medical diagnostic equipment, and test instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74HC541D,652 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, and energy-efficient components for automotive, industrial, computing, consumer, and communications markets.

The 74HC series targets general-purpose logic applications demanding wide supply range, low static power, and robust noise immunity - specifically engineered for cost-sensitive, thermally constrained embedded systems requiring proven reliability over 15+ year lifespans.

FAQ

Can 74HC541D,652 operate at 2.5 V supply?

Yes. The 74HC541D,652 is fully specified from 2.0 V to 6.0 V. At VCC = 2.5 V, VIH = 1.5 V (min.), VIL = 0.5 V (max.), and tpd ≤ 115 ns (max.) per datasheet Table 6 and Table 7 - enabling use in battery-powered 2.5 V systems such as portable data loggers and sensor nodes.

What is the maximum capacitive load this device can drive reliably?

Per datasheet Figure 5 and Table 7, 74HC541D,652 is characterized with CL = 50 pF. Its ±6 mA output drive supports stable operation into ≥ 50 pF loads at VCC = 4.5 V and Tamb = 25 °C. For heavier loads (e.g., 100 pF), propagation delay increases to ~45 ns, and slew rate degrades - add series termination or reduce trace length to maintain signal integrity.

Are OE1 and OE2 logically OR'd or AND'd internally?

OE1 and OE2 are AND'd: outputs Y0–Y7 enter high-impedance state if OE1 OR OE2 is HIGH. Functional Table 3 confirms that Yn = Z when either OE1 = H or OE2 = H - meaning both enables must be LOW (active) simultaneously for outputs to drive. This enables fail-safe bus isolation if either control line floats HIGH.

Does this part have built-in ESD protection on all pins?

Yes. Datasheet Section 2 specifies HBM > 2000 V and CDM > 1000 V on all I/O pins (A0–A7, Y0–Y7, OE1, OE2), verified per ANSI/ESDA/JEDEC JS-001 Class 2 and JS-002 Class C3. No external TVS diodes are required for typical board-level ESD events, though layout best practices (short traces, ground plane) remain essential.