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Home > Products > Integrated Circuits (ICs) > Logic > Buffers, Drivers, Receivers, Transceivers

Nexperia USA Inc. 74HCT7541D,118

Name: 74HCT7541D,118
Brand: Nexperia USA Inc.
SKU: 74HCT7541D,118
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74HCT7541D,118

Manufacturer:: Nexperia USA Inc.

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 20-SOIC (0.295", 7.50mm Width)

Datasheet:: 74HCT7541D,118.pdf

Description:: IC BUFFER NON-INVERT 5.5V 20SO

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Product details

Overview

74HCT7541D,118 from Nexperia is an octal Schmitt-trigger buffer/line driver with 3-state outputs, dual active-low output enables (OE1, OE2), TTL-compatible inputs, and SO20 (SOT163-1) packaging. It operates from 4.5 V to 5.5 V, delivers ±6 mA output drive at 5 V, supports -40 °C to +125 °C ambient, and transforms slow-rising/noisy signals into clean digital outputs in industrial bus interface applications.

For engineers reviewing the 74HCT7541D,118 datasheet, 74HCT7541D,118 pinout, 74HCT7541D,118 application, or 74HCT7541D,118 equivalent, key selection criteria include Schmitt-trigger hysteresis (0.23 V typ), 3-state enable timing (t_en = 18 ns max at V_CC = 4.5 V), 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 all eight non-inverting outputs (Y0–Y7); either HIGH forces full high-impedance state. Inputs feature integrated clamp diodes enabling safe interfacing to voltages exceeding V_CC when used with current-limiting resistors.

Schmitt-trigger inputs provide 0.23 V typical hysteresis (V_T+ = 2.0 V, V_T− = 0.77 V at V_CC = 4.5 V), eliminating chatter on noisy or slowly transitioning signals. Output drive strength is specified at ±6.0 mA (V_OH ≥ 3.98 V, V_OL ≤ 0.26 V) under recommended operating conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply voltage	4.5 V to 5.5 V - ensures compatibility with 5 V TTL systems and stable operation across industrial temperature range
Input threshold (V_T+/V_T−)	2.0 V / 0.77 V at V_CC = 4.5 V - defines noise immunity margin and reliable switching on degraded waveforms
Hysteresis (V_H)	0.23 V typical - suppresses multiple transitions caused by signal ringing or EMI
Output drive (I_OH/I_OL)	±6.0 mA at V_CC = 4.5 V - supports direct fan-out to ≥10 LS-TTL loads or termination of medium-length PCB traces
Propagation delay (A→Y)	19 ns max at V_CC = 4.5 V, C_L = 50 pF - enables use in sub-25 MHz synchronous bus buffering
Enable/disable time (OE→Y)	18 ns / 20 ns max at V_CC = 4.5 V - allows precise timing control in multiplexed data paths
Operating temperature	-40 °C to +125 °C - qualified for under-hood automotive modules and industrial motor drives

Pinout & Package

74HCT7541D,118 is housed in a plastic small outline package (SO20, SOT163-1) with 20 leads and 7.5 mm body width. Pin 1 is index-marked; pin 10 is GND; pin 20 is V_CC.

Pin/Terminal	Circuit Role	Design Meaning
1, 19	OE1, OE2	Active-low 3-state enables - both must be LOW to activate outputs; independent control allows partial bus isolation
2–9	A0–A7	Non-inverting Schmitt-trigger inputs - tolerate slow edges and noise; clamp diodes permit >V_CC input protection
10	GND	Ground reference - decoupling capacitor must be placed adjacent to pin 10 for stable switching
11–18	Y0–Y7	3-state buffered outputs - high-impedance state prevents bus contention during shared-line arbitration
20	V_CC	Positive supply - requires local 100 nF ceramic bypass between pins 20 and 10

Key Features

Feature	Design Value
Dual 3-state enables	Independent OE1/OE2 control enables selective channel gating without external logic
TTL-compatible inputs	Accepts standard 5 V TTL logic levels while operating from 4.5–5.5 V supply - eliminates level-shifter requirement
Schmitt-trigger hysteresis	0.23 V typical - rejects up to 230 mV of superimposed noise on input signals
Input clamp diodes	Enable safe interfacing to voltages up to V_CC + 0.5 V using series current-limiting resistors
High-noise immunity	CMOS input structure with 100% tested latch-up immunity (>100 mA per JESD78 Class II B)

Applications

Industrial Bus Interface

Motor Control I/O Expansion

Use Scenario: Buffering address/data lines between microcontroller and isolated CAN or RS-485 transceivers in factory automation PLCs.

IC Role / Device Role / Timing Role: Signal conditioning and bus isolation layer - converts noisy controller outputs into jitter-free, slew-controlled signals for robust communication PHYs.

Use Value: Schmitt-trigger inputs reject EMI-induced glitches on long backplane traces; 3-state outputs prevent contention during transceiver direction switching.

Use Scenario: Driving opto-isolated gate drivers for 3-phase IGBT inverters in servo drives.

IC Role / Device Role / Timing Role: Level-shifting and fan-out buffer - translates MCU GPIO logic to higher-current, noise-immune signals for isolated power stage control.

Use Value: ±6 mA drive capability directly sources optocoupler LEDs; wide temp range (-40 °C to +125 °C) ensures reliability in enclosed motor enclosures.

Test Equipment Signal Conditioning

Legacy System Upgrade Interface

Use Scenario: Cleaning slow-rising clock or trigger signals from analog waveform generators before feeding FPGA timing inputs.

IC Role / Device Role / Timing Role: Input signal integrity enhancer - eliminates metastability risk in digital acquisition systems by squaring up marginal edges.

Use Value: 0.23 V hysteresis removes sub-200 mV noise spikes; propagation delay <20 ns preserves timing alignment in high-speed sampling triggers.

Use Scenario: Interfacing modern 3.3 V microcontrollers to legacy 5 V parallel peripherals (e.g., dot-matrix displays, EEPROM programmers).

IC Role / Device Role / Timing Role: Voltage-tolerant bidirectional buffer - accepts 3.3 V logic while driving 5 V loads, with 3-state control for bus sharing.

Use Value: TTL-level inputs accept 3.3 V outputs as valid HIGH; clamp diodes allow safe 5 V pull-ups without damage.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74HCT244N	Single OE input; no Schmitt-trigger inputs; identical SO20 package and 5 V operation	Lacks noise immunity on slow inputs; suitable only for clean digital sources	Select when input signals are already well-conditioned and dual-OE control is unnecessary
74HCT541D	Same Schmitt-trigger inputs and dual-OE architecture; differs in pinout (Y0–Y7 on pins 12–19 vs. 11–18) and minor timing specs	Pin-compatible replacement with identical functional behavior and thermal profile	Choose for drop-in substitution where board layout permits minor trace rerouting

Compared with SN74HCT244N, 74HCT7541D,118 adds essential Schmitt-trigger noise rejection for harsh environments; versus 74HCT541D, it offers identical functionality but distinct pin mapping requiring layout verification - both alternatives lack the combined dual-OE and hysteresis advantages of the original.

Availability

74HCT7541D,118 is available at Aetrix Electronics and suitable for industrial bus interface, motor control I/O expansion, test equipment signal conditioning, and legacy system upgrade interface applications requiring stable component supply across extended temperature ranges.

Supply support for 74HCT7541D,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 delivering high-performance, reliable discrete, logic, and MOSFET solutions optimized for efficiency-critical applications.

The 74HCT7541D,118 belongs to Nexperia's 74HCT logic family, engineered for robust 5 V TTL-compatible operation in industrial and automotive-adjacent systems where noise immunity, thermal stability, and bus contention control are essential.

FAQ

What is the maximum allowable supply voltage for continuous operation?

The absolute maximum supply voltage is +7 V, but continuous operation must remain within the recommended range of 4.5 V to 5.5 V. Exceeding 5.5 V risks violating static characteristics and may cause premature wear due to increased ICC and junction temperature - sustained operation above 5.5 V voids parametric guarantees and accelerates electromigration.

Can 74HCT7541D,118 safely interface with 3.3 V microcontroller outputs?

Yes: its TTL-compatible inputs recognize 3.3 V as a valid HIGH-level input (VIH min = 2.0 V at VCC = 4.5 V). No level shifter is needed. However, outputs swing rail-to-rail (0 V to VCC), so connecting to 3.3 V-only inputs requires external voltage limiting or clamping to avoid overstress.

How does the dual output-enable architecture improve system design?

Dual OE inputs (OE1 and OE2) allow independent control of two groups of four outputs or coordinated enable/disable sequencing. This enables partial bus isolation, staggered power-up, or fault containment - for example, disabling half the outputs during diagnostic mode while keeping critical signals active.

Is thermal derating required for SO20 package operation above 109 °C?

Yes: total power dissipation derates linearly at 12.3 mW/K above 109 °C for the SO20 (SOT163-1) package. At 125 °C ambient, maximum allowed Ptot drops to ~290 mW. Designers must calculate worst-case dynamic power (using CPD = 32 pF) and ensure junction temperature stays below 150 °C with appropriate PCB copper area.

74HCT7541D,118 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: 74HCT

Package/Case:: 20-SOIC (0.295", 7.50mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Logic Type:: Buffer, Non-Inverting

Number of Elements:: 1

Number of Bits per Element:: 8

Input Type:: Schmitt Trigger

Output Type:: 3-State

Current - Output High, Low:: 6mA, 6mA

Voltage - Supply:: 4.5V ~ 5.5V

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 20-SO

74HCT7541D,118 FAQ

1.How can I place an order for 74HCT7541D,118 through Aetrix?

Please submit a Request for Quotation (RFQ) for 74HCT7541D,118 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.

2.Are the price and stock information for 74HCT7541D,118 reliable?

The price and inventory of 74HCT7541D,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT7541D,118 is usually 5 days.

3.What payment methods are accepted for 74HCT7541D,118?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT7541D,118 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74HCT7541D,118?

74HCT7541D,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74HCT7541D,118 order is processed, you will receive an email with the shipment details and tracking number.

Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.

5.How can I obtain technical support or documentation for 74HCT7541D,118?

For technical support, including 74HCT7541D,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT7541D,118 requirements.

6.How does Aetrix verify that 74HCT7541D,118 is sourced from the original manufacturer or authorized distributors?

All 74HCT7541D,118 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that 74HCT7541D,118 meets industry standards.

7.What is the process for return or replacement of 74HCT7541D,118?

All 74HCT7541D,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT7541D,118, returns or replacements are accepted under the following conditions:

1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.

2.The issue is reported within 90 days of delivery.

3.The 74HCT7541D,118 part is unused and in its original packaging.

Return procedure for 74HCT7541D,118:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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