Nexperia USA Inc. 74HC541DB,112

Overview

74HC541DB,112 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, with dual active-low output enables (OE1, OE2), ±35 mA output drive, and guaranteed operation from –40 °C to +125 °C - used for bidirectional bus interfacing and address/data line isolation in industrial control logic.

For engineers reviewing the 74HC541DB,112 datasheet, 74HC541DB,112 pinout, 74HC541DB,112 application, or 74HC541DB,112 equivalent, key selection criteria include CMOS-level input compatibility, propagation delay ≤23 ns at 4.5 V, 3-state enable/disable timing (ten ≤32 ns, tdis ≤48 ns), and SO20 thermal derating (12.3 mW/K above 109 °C).

Technical Context

This device implements eight identical non-inverting buffer circuits, each with independent input-to-output signal path and shared 3-state control via two active-low enables. Its dual OE architecture allows partitioned bus control - e.g., enabling Y0–Y3 while disabling Y4–Y7 - without external logic.

Input clamp diodes support overvoltage-tolerant interfacing (e.g., 5 V inputs into 3.3 V systems using current-limiting resistors), and static characteristics guarantee VIH ≥1.5 V at VCC = 2.0 V and VOL ≤0.26 V at IO = 7.8 mA, ensuring robust noise immunity and rail-to-rail logic compatibility across voltage domains.

Key Specifications

Pinout & Package

74HC541DB,112 uses the SO20 plastic small outline package (SOT163-1), 20-pin, 7.5 mm body width, with standard 1.27 mm lead pitch and gull-wing leads suitable for reflow soldering.

Key Features

Applications

Equivalent & Alternatives

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

Compared with 74HC541DB,112, the 74HCT541DB,112 offers TTL input compatibility at the cost of reduced noise margin in mixed-voltage CMOS systems, while SN74LVC541APWR trades 5 V tolerance and SO20 thermal performance for lower voltage operation and compact packaging - making each optimal for distinct voltage-domain and thermal constraints.

Availability

74HC541DB,112 is available at Aetrix Electronics and suitable for industrial PLC backplanes, microcontroller memory interfaces, legacy printer port adapters, and ATE signal routing requiring stable component supply across extended temperature ranges.

Supply support for 74HC541DB,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 logic, analog, and MOSFET solutions with emphasis on reliability, efficiency, and manufacturability for industrial and automotive markets.

The 74HC541 belongs to Nexperia's HC-series logic family, designed for robust, low-power, wide-supply-voltage digital interfacing in harsh environments - prioritizing ESD resilience, latch-up immunity, and extended temperature operation.

FAQ

What is the maximum clock frequency supported by 74HC541DB,112?

The 74HC541DB,112 does not operate on a clock; it is a combinational buffer with propagation delay of 12 ns (typ) at 4.5 V. Its usable data rate depends on system timing margins - for example, it supports reliable 25 MHz bus operation when paired with 50 pF loads and proper layout, but no internal clock circuitry exists.

Can OE1 and OE2 be tied together for single-enable operation?

Yes - OE1 and OE2 may be connected to a common control signal. The functional table confirms that a HIGH on either OE forces all outputs to high-impedance, so tying them simplifies control logic without affecting functionality or timing parameters.

Is 74HC541DB,112 pin-compatible with 74HC244?

No - although both are octal 3-state buffers, 74HC244 has different pinout (dual 4-bit groups with separate enables per group) and lacks the dual-OE architecture of 74HC541. Pin mapping differs: 74HC244 places GND at pin 10 but assigns OE1/OE2 to pins 1 and 19 differently, making direct replacement impossible without PCB revision.

Does 74HC541DB,112 support hot-swap insertion?

It supports controlled hot-swap when powered sequencing and bus biasing are managed externally. The device itself features JESD78 Class II latch-up immunity (>100 mA) and HBM ESD protection (>2000 V), but unpowered insertion into a live bus risks output contention and must be avoided unless system-level safeguards (e.g., series resistors, precharge circuits) are implemented.