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

Texas Instruments SN74F541DWR

Name: SN74F541DWR
Brand: Texas Instruments
SKU: SN74F541DWR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74F541DWR

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

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

Datasheet:: SN74F541DWR.pdf

Description:: IC BUF NON-INVERT 5.5V 20SOIC

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Product details

Overview

SN74F541DWR from Texas Instruments is an octal 3-state buffer/driver IC used for bus interfacing and memory address register buffering in TTL-compatible digital systems. It features dual active-low output-enable inputs (OE1, OE2), 8-bit non-inverting data path, 20-pin SOIC package, and operates from 4.5 V to 5.5 V at 0°C to 70°C. Typical propagation delay is 3.3 ns (tPLH/tPHL) with 64 mA low-level output drive capability.

For engineers reviewing the SN74F541DWR datasheet, SN74F541DWR pinout, SN74F541DWR application, or SN74F541DWR equivalent, key selection considerations include 3-state bus-driving capability, input/output separation for PCB layout optimization, TTL-level compatibility, thermal rating for commercial environments, and SOIC-20 tape-and-reel availability for automated assembly.

Technical Context

The SN74F541DWR implements a dual-gated 3-state control architecture: both OE1 and OE2 must be low to enable outputs; either high forces all Y1–Y8 into high-impedance. Its data flow-through pinout places all 8 inputs (A1–A8) on one side and all 8 outputs (Y1–Y8) on the opposite side, minimizing trace crossovers on dense PCBs.

Designed for TTL logic families, it delivers 64 mA sink current per output (IOL) and –15 mA source current (IOH) under recommended conditions, with guaranteed VOH ≥ 2.0 V and VOL ≤ 0.55 V. Output leakage in 3-state mode is ±50 µA, supporting reliable bus contention management in shared-data-path systems.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	4.5 V to 5.5 V - Ensures stable operation across standard TTL rail tolerances without regulation.
Operating Temperature	0°C to 70°C - Qualified for commercial-grade embedded and industrial control applications.
Propagation Delay	1.5–6 ns - Enables reliable timing in 25+ MHz bus systems with 50 pF load.
Output Drive (IOL)	64 mA - Sufficient to drive multiple TTL inputs or terminated transmission lines.
3-State Leakage	±50 µA - Minimizes bus loading when outputs are disabled, preserving signal integrity.
Input Thresholds	VIL = 0.8 V, VIH = 2.0 V - Fully compatible with standard TTL logic voltage levels.
Package	SOIC-20 (DW) - Surface-mount format with 1.27 mm pitch, optimized for automated placement and reflow.

Pinout & Package

SN74F541DWR uses a 20-pin SOIC (DW) package with 7.6 mm × 13.0 mm body size and 2.65 mm max height. Pin 1 identifier is located at top-left corner with notch marking orientation.

Pin/Terminal	Circuit Role	Design Meaning
1, 19	OE1, OE2	Active-low output enable inputs - Both must be low for Y1–Y8 to reflect A1–A8; independent gating allows partial bus control.
2–9	A1–A8	Data inputs - Non-inverting inputs aligned on left side to simplify routing from microcontroller or ASIC address/data buses.
11–18	Y1–Y8	3-state buffered outputs - Right-side placement enables straight-through bus trace layout with minimal vias.
10	GND	Ground reference - Shared return path for all I/O and internal logic; requires low-inductance connection.
20	VCC	Power supply - 5 V nominal; decoupling capacitor (0.1 µF) required near pin for noise suppression.

Key Features

Feature	Design Value
Dual 3-state enable logic	AND-gated OE1/OE2 with active-low inputs enables flexible bus arbitration and hierarchical enable schemes.
Data flow-through pinout	Inputs (A1–A8) and outputs (Y1–Y8) on opposite package edges reduce PCB layer count and crosstalk in high-density layouts.
TTL-compatible drive strength	64 mA sink / –15 mA source ensures robust fanout to 10+ standard TTL loads without external buffers.
Low propagation skew	Max tPLH/tPHL variation ≤ 0.5 ns across channels maintains timing alignment in parallel data paths.
SOIC-20 tape-and-reel packaging	2000-unit reels with Q1 pin-1 quadrant support seamless integration into SMT pick-and-place workflows.

Applications

Memory Address Buffering	Parallel Bus Isolation
Use Scenario: Buffering 8-bit address lines between a microcontroller and SRAM or EPROM to prevent loading and timing violations. IC Role / Device Role / Timing Role: Non-inverting 3-state buffer that isolates address bus during DMA cycles or peripheral access. Use Value: Enables clean address transitions with <6 ns propagation delay and eliminates bus contention via OE-controlled high-Z state.	Use Scenario: Interfacing two independent 8-bit data buses (e.g., CPU-to-peripheral and peripheral-to-FPGA) sharing a common physical trace. IC Role / Device Role / Timing Role: Bidirectional bus driver with independent OE control for direction and arbitration. Use Value: Prevents signal corruption during bus handoff using dual OE gating; supports hot-swap-safe isolation.
Legacy System Bus Expansion	Industrial Control Backplane Interface
Use Scenario: Adding expansion slots to vintage 8-bit computer designs (e.g., Z80 or 6502-based systems) requiring TTL-level address/data buffering. IC Role / Device Role / Timing Role: Octal buffer providing level-shifting and fanout extension for legacy bus protocols. Use Value: Maintains strict TTL voltage thresholds and timing margins while enabling modular board stacking.	Use Scenario: Driving distributed I/O modules over long backplane traces in programmable logic controller (PLC) racks. IC Role / Device Role / Timing Role: Robust bus driver delivering 64 mA per line to overcome trace capacitance and EMI-induced attenuation. Use Value: Guarantees signal integrity up to 25 cm trace lengths with <0.55 V VOL and controlled edge rates.

Memory Address Buffering

Parallel Bus Isolation

Use Scenario: Buffering 8-bit address lines between a microcontroller and SRAM or EPROM to prevent loading and timing violations.

IC Role / Device Role / Timing Role: Non-inverting 3-state buffer that isolates address bus during DMA cycles or peripheral access.

Use Value: Enables clean address transitions with <6 ns propagation delay and eliminates bus contention via OE-controlled high-Z state.

Use Scenario: Interfacing two independent 8-bit data buses (e.g., CPU-to-peripheral and peripheral-to-FPGA) sharing a common physical trace.

IC Role / Device Role / Timing Role: Bidirectional bus driver with independent OE control for direction and arbitration.

Use Value: Prevents signal corruption during bus handoff using dual OE gating; supports hot-swap-safe isolation.

Legacy System Bus Expansion

Industrial Control Backplane Interface

Use Scenario: Adding expansion slots to vintage 8-bit computer designs (e.g., Z80 or 6502-based systems) requiring TTL-level address/data buffering.

IC Role / Device Role / Timing Role: Octal buffer providing level-shifting and fanout extension for legacy bus protocols.

Use Value: Maintains strict TTL voltage thresholds and timing margins while enabling modular board stacking.

Use Scenario: Driving distributed I/O modules over long backplane traces in programmable logic controller (PLC) racks.

IC Role / Device Role / Timing Role: Robust bus driver delivering 64 mA per line to overcome trace capacitance and EMI-induced attenuation.

Use Value: Guarantees signal integrity up to 25 cm trace lengths with <0.55 V VOL and controlled edge rates.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LS541N	Lower drive (24 mA IOL), slower propagation (15 ns typical), PDIP-20 only	Compatible in legacy through-hole designs but unsuitable for high-speed or surface-mount production	Select when cost sensitivity outweighs speed and package requirements
SN74ACT541PW	CMOS technology, 5 V tolerant, 24 mA IOL, 7 ns max delay, TSSOP-20	Higher noise immunity and lower ICC, but reduced drive vs. F-series TTL	Prefer for mixed-voltage systems or where power efficiency > raw drive strength

Compared with SN74LS541N and SN74ACT541PW, the SN74F541DWR provides superior current drive and speed for TTL-bus-critical applications, while its SOIC-20 packaging supports modern SMT manufacturing-making it optimal for new commercial designs requiring proven bus-driving performance.

Availability

SN74F541DWR is available at Aetrix Electronics and suitable for memory address buffering, parallel bus isolation, and industrial backplane interface applications requiring stable component supply and long-term manufacturability.

Supply support for SN74F541DWR 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

Texas Instruments is a global semiconductor leader founded in 1930, specializing in analog, embedded processing, and logic solutions with broad industrial, automotive, and communications reach.

The SN74F541DWR belongs to TI's 74F logic family-designed specifically for high-speed TTL-compatible digital interfacing in commercial systems where propagation delay, drive strength, and layout efficiency are critical.

FAQ

What is the maximum operating temperature range for the SN74F541DWR?

The SN74F541DWR is characterized for operation from 0°C to 70°C, meeting commercial-grade environmental specifications. This range supports deployment in office equipment, consumer electronics, and industrial control panels where ambient temperatures remain within standard room-temperature envelopes. The SN74F541DWR does not support extended or military temperature ranges-those require the SN54F541 variant.

Does the SN74F541DWR support true bidirectional data flow?

No, the SN74F541DWR is a unidirectional octal buffer: data flows only from A1–A8 inputs to Y1–Y8 outputs. It lacks internal direction control or bus transceiver functionality. For bidirectional operation, discrete pairing with a second SN74F541DWR (with swapped A/Y connections) or use of a dedicated transceiver like the SN74F245 is required. The SN74F541DWR's dual OE inputs allow coordinated enable/disable but not reversal of signal direction.

What is the recommended decoupling strategy for the SN74F541DWR?

Place a 0.1 µF ceramic capacitor between VCC (pin 20) and GND (pin 10), located within 5 mm of the SN74F541DWR package. For systems with multiple SN74F541DWR devices or high switching activity, add a bulk 4.7 µF tantalum or aluminum electrolytic capacitor per 5–10 ICs on the same VCC rail. Avoid shared vias between decoupling caps and GND pins to minimize inductance and ensure effective high-frequency noise suppression.

Can SN74F541DWR outputs be safely tied together in wired-OR configuration?

No-SN74F541DWR outputs are not designed for wired-OR. Its 3-state outputs are intended for bus-sharing via mutual exclusion (only one device enabled at a time). Connecting multiple SN74F541DWR outputs directly risks contention damage if any two devices simultaneously drive opposing logic states. Wired-OR requires open-collector/drain outputs with pull-up resistors, which the SN74F541DWR does not provide.

Is the SN74F541DWR RoHS compliant and lead-free?

Yes, the SN74F541DWR is RoHS compliant with lead-free terminations. Its package uses NiPdAu (nickel-palladium-gold) plating on copper leads, meeting JEDEC J-STD-609 Category 1 requirements. The MSL rating is Level-1 at 260°C peak reflow, confirming suitability for standard Pb-free soldering processes. Full compliance documentation-including substance declarations and test reports-is available through Texas Instruments' Quality & Environmental page.

SN74F541DWR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74F

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:: -

Output Type:: 3-State

Current - Output High, Low:: 15mA, 64mA

Voltage - Supply:: 4.5V ~ 5.5V

Operating Temperature:: 0°C ~ 70°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 20-SOIC

SN74F541DWR FAQ

1.How can I place an order for SN74F541DWR through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74F541DWR 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 SN74F541DWR reliable?

The price and inventory of SN74F541DWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74F541DWR is usually 5 days.

3.What payment methods are accepted for SN74F541DWR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74F541DWR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN74F541DWR?

SN74F541DWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74F541DWR 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 SN74F541DWR?

For technical support, including SN74F541DWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74F541DWR requirements.

6.How does Aetrix verify that SN74F541DWR is sourced from the original manufacturer or authorized distributors?

All SN74F541DWR 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 SN74F541DWR meets industry standards.

7.What is the process for return or replacement of SN74F541DWR?

All SN74F541DWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74F541DWR, 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 SN74F541DWR part is unused and in its original packaging.

Return procedure for SN74F541DWR:

1.Submit a request within 90 days.

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

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