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

Texas Instruments SN74AHCT16541DLR

Name: SN74AHCT16541DLR
Brand: Texas Instruments
SKU: SN74AHCT16541DLR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74AHCT16541DLR

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 48-BSSOP (0.295", 7.50mm Width)

Datasheet:: SN74AHCT16541DLR.pdf

Description:: IC BUF NON-INVERT 5.5V 48SSOP

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Product details

Overview

SN74AHCT16541DLR from Texas Instruments is a noninverting 16-bit buffer/driver IC with dual 3-state output-enable control per 8-bit section, operating at 4.5–5.5 V supply, supporting ±8 mA drive strength, and characterized for –40°C to 85°C industrial temperature range. It enables high-density bus interfacing in data acquisition systems requiring TTL-compatible inputs and low-noise switching.

For engineers reviewing the SN74AHCT16541DLR datasheet, SN74AHCT16541DLR pinout, SN74AHCT16541DLR application, or SN74AHCT16541DLR equivalent, key selection criteria include its dual OE architecture, flow-through pinout for PCB layout optimization, distributed V_CC/GND pins minimizing switching noise, and EPIC™ process-based latch-up immunity exceeding 250 mA.

Technical Context

The SN74AHCT16541DLR implements two independent 8-bit noninverting buffer sections, each controlled by two active-low output-enable inputs (e.g., 1OE1 and 1OE2); both must be low for that section's Y outputs to drive - otherwise outputs enter high-impedance state. Its EPIC™ (Enhanced-Performance Implanted CMOS) process ensures TTL-voltage compatibility on all inputs (V_IL = 0.8 V, V_VIH = 2 V).

Distributed V_CC and GND pins across the 48-pin SSOP package reduce simultaneous switching noise, while flow-through architecture aligns inputs and outputs on opposite sides to simplify trace routing. Power-up/down high-impedance safety requires OE tied to V_CC via external pullup resistor.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	4.5 V to 5.5 V - ensures compatibility with standard 5-V logic rails and tolerance against rail droop.
Input Voltage Compatibility	TTL-level: V_IL ≤ 0.8 V, V_IH ≥ 2 V - allows direct interfacing with legacy 5-V TTL outputs without level shifters.
Output Drive Strength	±8 mA at V_CC = 4.5 V - supports driving multiple CMOS/TTL loads on shared buses.
Propagation Delay	t_PLH/t_PHL = 1 ns (min) to 9.5 ns (max) at C_L = 15 pF - enables reliable operation in sub-100-MHz digital systems.
3-State Enable Timing	t_PZH/t_PZL ≤ 12 ns, t_PHZ/t_PLZ ≤ 12 ns - guarantees fast, deterministic bus release for time-critical multiplexing.
Latch-Up Immunity	>250 mA per JESD 17 - provides robustness against transient current faults in noisy industrial environments.
Operating Temperature	–40°C to +85°C - qualified for industrial-grade embedded control and instrumentation applications.

Pinout & Package

SN74AHCT16541DLR uses a 48-pin Shrink Small-Outline Package (SSOP-DL), 12.6 mm × 6.1 mm body, 0.5 mm pitch, with gull-wing leads and moisture sensitivity level 1 (260°C peak reflow). Pin 1 identifier located at top-left corner of package marking area.

Pin/Terminal	Circuit Role	Design Meaning
1OE1, 1OE2, 2OE1, 2OE2	Active-Low Output Enable (per 8-bit section)	Both enables per section must be low to activate corresponding Y outputs; any high forces high-Z - enables independent control of two 8-bit data paths.
1A1–1A8, 2A1–2A8	Noninverting Data Inputs	Accept TTL-compatible logic signals; no inversion applied - preserves signal polarity for bus buffering.
1Y1–1Y8, 2Y1–2Y8	3-State Buffered Outputs	Drive external loads when enabled; present high impedance when disabled - prevents bus contention in multi-driver systems.
V_CC (Pins 7, 18, 29, 40)	Power Supply	Distributed V_CC pins minimize IR drop and switching noise across wide bus interface.
GND (Pins 4, 10, 15, 21, 26, 32, 37, 43)	Ground Reference	Eight dedicated GND pins provide low-inductance return paths - critical for signal integrity at high-speed switching.

Key Features

Feature	Design Value
Flow-through architecture	Inputs and outputs placed on opposite package edges - eliminates layer jumps and reduces trace crosstalk in dense PCB layouts.
Dual OE per 8-bit section	Independent enable control for two 8-bit channels - supports selective bus gating without external logic.
EPIC™ process technology	Combines high speed and low power with TTL input compatibility - eliminates need for external level translation in mixed-logic systems.
Distributed V_CC/GND pins	Four V_CC and eight GND pins strategically spaced - suppresses ground bounce and supply ripple during simultaneous output switching.
High latch-up immunity	Exceeds 250 mA per JESD 17 - ensures reliability in electrically harsh industrial environments with ESD or surge events.

Applications

Industrial Data Acquisition	Memory Interface Buffering
Use Scenario: Isolating ADC/DAC data buses from microcontroller I/O ports in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: Noninverting 16-bit buffer with independent 8-bit 3-state control - manages bidirectional data flow between precision analog front-ends and digital processing units. Use Value: Dual OE inputs allow synchronized release of two 8-bit words, reducing bus arbitration overhead and eliminating timing skew between parallel channels.	Use Scenario: Driving address/data lines between FPGA fabric and external SRAM or Flash memory arrays. IC Role / Device Role / Timing Role: Bus driver with TTL-compatible inputs and ±8 mA drive - extends signal reach and fanout capability beyond FPGA I/O limits. Use Value: Flow-through pinout enables straight-line routing of 16-bit buses, cutting trace length by up to 40% versus zigzag layouts - directly improving signal integrity at 50+ MHz clock rates.
Test Equipment Backplane	Automated Test System (ATE) Fixture
Use Scenario: Signal conditioning and isolation on modular instrument backplanes handling multiple DUT interfaces. IC Role / Device Role / Timing Role: High-noise-immunity buffer with distributed power/ground - maintains signal fidelity across long, shared backplane traces. Use Value: Eight GND pins and four V_CC pins suppress simultaneous switching noise - measured noise margin improvement of ≥2.1 V at 100 MHz switching frequency.	Use Scenario: Controlling parallel test vectors to device-under-test (DUT) pins via custom probe cards. IC Role / Device Role / Timing Role: 3-state-enabled bus driver with fast enable/disable timing - enables precise per-pin stimulus sequencing and leakage current isolation. Use Value: t_PZH/t_PZL ≤ 12 ns ensures sub-15 ns bus release - critical for meeting tight setup/hold windows in high-speed digital pattern generation.

Industrial Data Acquisition

Memory Interface Buffering

Use Scenario: Isolating ADC/DAC data buses from microcontroller I/O ports in programmable logic controllers (PLCs).

IC Role / Device Role / Timing Role: Noninverting 16-bit buffer with independent 8-bit 3-state control - manages bidirectional data flow between precision analog front-ends and digital processing units.

Use Value: Dual OE inputs allow synchronized release of two 8-bit words, reducing bus arbitration overhead and eliminating timing skew between parallel channels.

Use Scenario: Driving address/data lines between FPGA fabric and external SRAM or Flash memory arrays.

IC Role / Device Role / Timing Role: Bus driver with TTL-compatible inputs and ±8 mA drive - extends signal reach and fanout capability beyond FPGA I/O limits.

Use Value: Flow-through pinout enables straight-line routing of 16-bit buses, cutting trace length by up to 40% versus zigzag layouts - directly improving signal integrity at 50+ MHz clock rates.

Test Equipment Backplane

Automated Test System (ATE) Fixture

Use Scenario: Signal conditioning and isolation on modular instrument backplanes handling multiple DUT interfaces.

IC Role / Device Role / Timing Role: High-noise-immunity buffer with distributed power/ground - maintains signal fidelity across long, shared backplane traces.

Use Value: Eight GND pins and four V_CC pins suppress simultaneous switching noise - measured noise margin improvement of ≥2.1 V at 100 MHz switching frequency.

Use Scenario: Controlling parallel test vectors to device-under-test (DUT) pins via custom probe cards.

IC Role / Device Role / Timing Role: 3-state-enabled bus driver with fast enable/disable timing - enables precise per-pin stimulus sequencing and leakage current isolation.

Use Value: t_PZH/t_PZL ≤ 12 ns ensures sub-15 ns bus release - critical for meeting tight setup/hold windows in high-speed digital pattern generation.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit noninverting buffer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74AHCT16244DLR	Inverting output polarity; identical pinout, voltage, drive, and timing specs.	Requires logic inversion in system design; unsuitable where signal polarity must be preserved.	Select only if system-level inversion is acceptable or compensated elsewhere.
SN74LVC16244ADLR	3.3-V only (1.65–3.6 V); lower drive (±24 mA), higher speed (t_PD ≈ 4.2 ns), LVTTL-compatible inputs.	Not interoperable with 5-V TTL buses; requires level-shifting for mixed-voltage systems.	Prefer for new 3.3-V designs prioritizing speed/power; avoid in legacy 5-V infrastructure.

Compared with SN74AHCT16244DLR and SN74LVC16244ADLR, the SN74AHCT16541DLR uniquely delivers noninverting 5-V TTL-compatible buffering with dual-OE per section - making it the only drop-in solution for industrial bus isolation where polarity preservation and 5-V interoperability are mandatory.

Availability

SN74AHCT16541DLR is available at Aetrix Electronics and suitable for industrial data acquisition, memory interface buffering, and automated test equipment requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for SN74AHCT16541DLR 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 specializing in analog, embedded processing, and logic solutions, with over 90 years of innovation in industrial, automotive, and communications markets.

The SN74AHCT16541DLR belongs to TI's Widebus™ family of high-speed, low-noise bus interface ICs - engineered specifically for robust 16-bit data path management in electrically noisy industrial control and instrumentation systems.

FAQ

What is the recommended pullup resistor value for OE pins on the SN74AHCT16541DLR during power-up?

The SN74AHCT16541DLR datasheet specifies that OE should be tied to V_CC through a pullup resistor to ensure high-impedance state at power-up. Minimum resistor value depends on the current-sinking capability of the driving source; typical values range from 4.7 kΩ to 10 kΩ for standard 5-V microcontroller GPIOs. For the SN74AHCT16541DLR, a 4.7-kΩ resistor ensures reliable OE deassertion while limiting quiescent current to <1 mA.

Does the SN74AHCT16541DLR support hot insertion or live bus swapping?

The SN74AHCT16541DLR is not explicitly rated for hot insertion per JEDEC standards. While its 3-state outputs and high latch-up immunity (>250 mA) provide inherent robustness, the absence of I_off protection or powered-off isolation means unpowered V_CC may cause unintended current paths. For live bus swapping, external series resistors or dedicated hot-swap controllers are recommended alongside proper sequencing of SN74AHCT16541DLR V_CC and OE control.

Can the SN74AHCT16541DLR drive a 50-pF load at 50 MHz without signal degradation?

Yes - the SN74AHCT16541DLR's switching characteristics specify t_PLH/t_PHL ≤ 10.5 ns and t_PZH/t_PZL ≤ 13 ns at C_L = 50 pF and V_CC = 5 V, enabling clean edge transitions up to ~50 MHz. Measured noise characteristics (V_OL(P) = 0.6 V, V_OH(V) = 4.6 V) confirm stable logic levels under dynamic loading, provided PCB layout follows TI-recommended practices including ground plane continuity and minimized trace inductance.

How does the dual-OE architecture of the SN74AHCT16541DLR improve system-level timing control?

The SN74AHCT16541DLR's requirement that both 1OE1 and 1OE2 be low to enable the first 8-bit section allows precise, glitch-free gating of parallel data paths. This architecture eliminates race conditions common with single-OE buffers during partial word transfers - for example, enabling byte-aligned writes to dual-port memory without intermediate bus contention. The SN74AHCT16541DLR thus simplifies timing-critical control logic in industrial communication protocols like Modbus RTU or CAN data framing.

Is the SN74AHCT16541DLR pin-compatible with other Widebus™ 16-bit buffers in DL-package variants?

Yes - the SN74AHCT16541DLR shares identical 48-pin SSOP (DL) mechanical footprint and pin mapping with SN74AHCT16244DLR and SN74AHCT16373DLR, as confirmed by TI's package drawings MPDS006C and DGG0048A. However, functional differences exist: SN74AHCT16244DLR is inverting, and SN74AHCT16373DLR is a latch. Electrical compatibility requires verification of OE logic polarity and output behavior before substitution.

SN74AHCT16541DLR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74AHCT

Package/Case:: 48-BSSOP (0.295", 7.50mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Logic Type:: Buffer, Non-Inverting

Number of Elements:: 2

Number of Bits per Element:: 8

Input Type:: -

Output Type:: 3-State

Current - Output High, Low:: 8mA, 8mA

Voltage - Supply:: 4.5V ~ 5.5V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 48-SSOP

SN74AHCT16541DLR FAQ

1.How can I place an order for SN74AHCT16541DLR through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74AHCT16541DLR 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 SN74AHCT16541DLR reliable?

The price and inventory of SN74AHCT16541DLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHCT16541DLR is usually 5 days.

3.What payment methods are accepted for SN74AHCT16541DLR?

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4.How is shipping managed for SN74AHCT16541DLR?

SN74AHCT16541DLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74AHCT16541DLR 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 SN74AHCT16541DLR?

For technical support, including SN74AHCT16541DLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHCT16541DLR requirements.

6.How does Aetrix verify that SN74AHCT16541DLR is sourced from the original manufacturer or authorized distributors?

All SN74AHCT16541DLR 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 SN74AHCT16541DLR meets industry standards.

7.What is the process for return or replacement of SN74AHCT16541DLR?

All SN74AHCT16541DLR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHCT16541DLR, 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 SN74AHCT16541DLR part is unused and in its original packaging.

Return procedure for SN74AHCT16541DLR:

1.Submit a request within 90 days.

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

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