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

Texas Instruments SN74AHCT16541DGGR

Name: SN74AHCT16541DGGR
Brand: Texas Instruments
SKU: SN74AHCT16541DGGR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74AHCT16541DGGR

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 48-TFSOP (0.240", 6.10mm Width)

Datasheet:: SN74AHCT16541DGGR.pdf

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

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Product details

Overview

SN74AHCT16541DGGR from Texas Instruments is a noninverting 16-bit buffer/driver IC with dual 8-bit sections, 3-state outputs, TTL-compatible inputs, and operation over –40°C to 85°C. It features distributed V_CC/GND pins for noise reduction, flow-through pinout for optimized PCB layout, and ±25 mA output drive capability. Used in high-density data bus interfacing and memory address buffering.

For engineers reviewing the SN74AHCT16541DGGR datasheet, SN74AHCT16541DGGR pinout, SN74AHCT16541DGGR application, or SN74AHCT16541DGGR equivalent, key selection criteria include 3-state control timing (t_PZH/t_PHZ ≤ 12 ns at 50 pF), dual independent OE pairs per 8-bit section, thermal resistance (θ_JA = 70°C/W), and TSSOP-48 package compatibility with automated SMT assembly.

Technical Context

The SN74AHCT16541DGGR implements two independent 8-bit noninverting buffer sections, each controlled by two active-low output-enable inputs (e.g., 1OE1 and 1OE2 must both be low for Y1–Y8 to be active). Outputs enter high-impedance state if either OE input is high - enabling precise bus contention management in multiplexed systems.

Manufactured using TI's EPIC™ (Enhanced-Performance Implanted CMOS) process, it delivers TTL-voltage compatibility (V_IL = 0.8 V, V_IH = 2 V) while maintaining CMOS power efficiency. Distributed power/ground pins and flow-through architecture reduce simultaneous switching noise and simplify trace routing on dense logic boards.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply voltage (V_CC)	4.5 V to 5.5 V - ensures stable operation across industrial-grade 5 V rails with margin for ripple.
Output drive (I_OL/I_OH)	±8 mA - sufficient to drive standard TTL loads and multiple CMOS inputs without external buffers.
Propagation delay (t_PLH/t_PHL)	≤9.5 ns at 50 pF - supports >50 MHz bus toggle rates in synchronous data paths.
Enable/disable time (t_PZH/t_PHZ)	≤13 ns at 50 pF - enables fast bus arbitration and dynamic channel isolation.
Input capacitance (C_i)	10 pF max - minimizes loading on upstream drivers and preserves signal integrity in fanout-critical designs.
Thermal resistance (θ_JA)	70°C/W (TSSOP-48) - defines maximum power dissipation (≈170 mW at ΔT = 12°C) before derating required.
Operating temperature	–40°C to +85°C - qualified for industrial ambient environments without extended burn-in or screening.

Pinout & Package

TSSOP-48 (DGG) package: 12.6 mm × 6.1 mm × 1.2 mm body, 0.5 mm pitch, lead-free NiPdAu finish, MSL Level-1.

Pin/Terminal	Circuit Role	Design Meaning
1OE1, 1OE2, 2OE1, 2OE2	Active-low output-enable controls	Each 8-bit section requires both OE signals low to enable outputs; any high disables that section into high-Z - enables independent gating of two 8-bit data lanes.
1A1–1A8, 2A1–2A8	Noninverting input terminals	Direct logic-level pass-through inputs; TTL-compatible thresholds allow direct connection to legacy 5 V microcontrollers and FPGAs.
1Y1–1Y8, 2Y1–2Y8	3-state buffered outputs	Drive bidirectional buses or shared memory/data lines; high-Z state prevents contention during read/write direction changes.
V_CC (pins 7, 18, 29, 40)	Distributed power supply	Four V_CC pins minimize IR drop and switching noise across wide bus - critical for clean signal edges in high-speed parallel interfaces.
GND (pins 4, 10, 15, 22, 27, 34, 43, 46)	Distributed ground return	Eight GND pins provide low-inductance return paths for all 16 outputs - reduces ground bounce and improves EMI performance.

Key Features

Feature	Design Value
Flow-through pinout	Input and output pins aligned on opposite sides (e.g., 1A1→1Y1 adjacent vertically) - eliminates layer jumps and vias in bus routing, reducing parasitic inductance.
Dual independent OE control per 8-bit section	Two OE inputs per section (e.g., 1OE1 & 1OE2) require logical AND activation - allows hierarchical enable schemes and partial-bus isolation.
EPIC™ process technology	Combines high-speed bipolar-like switching with CMOS low static power - achieves <10 ns propagation delay with <40 µA ICC at standby.
TTL-input compatibility	V_IL ≤ 0.8 V, V_IH ≥ 2.0 V - interoperates directly with legacy 5 V TTL logic without level shifters or pull-up resistors.
Latch-up immunity	Exceeds 250 mA per JESD 17 - protects against destructive current surges during hot-plug or supply sequencing events.

Applications

Memory Address Buffering	Industrial PLC I/O Expansion
Use Scenario: Driving 16-bit address lines from a microcontroller to multiple SRAM or Flash devices sharing a common data bus. IC Role / Device Role / Timing Role: Noninverting buffer with 3-state outputs isolates address lines during memory read cycles to prevent bus contention. Use Value: Dual OE control allows separate enabling of upper/lower address bytes, supporting interleaved memory access patterns without additional logic.	Use Scenario: Interfacing a programmable logic controller CPU module to distributed digital I/O racks via parallel backplane wiring. IC Role / Device Role / Timing Role: Bidirectional bus driver managing 16-bit status/command words between master and slave modules. Use Value: Distributed V_CC/GND pins suppress switching noise in electrically noisy factory environments, ensuring reliable communication at 10+ MHz update rates.
Legacy System Bus Interface	Test Equipment Signal Conditioning
Use Scenario: Adapting modern FPGA I/O banks to legacy ISA or VMEbus peripherals requiring 5 V TTL signaling and strict timing margins. IC Role / Device Role / Timing Role: Level-translating buffer with guaranteed t_PLH/t_PHL ≤ 9.5 ns ensures setup/hold compliance for 25 MHz bus clocks. Use Value: Flow-through architecture simplifies PCB layout on space-constrained adapter cards, reducing trace length mismatch and skew.	Use Scenario: Routing and conditioning 16-bit parallel test vectors from ATE pattern generators to DUT interface boards. IC Role / Device Role / Timing Role: Output driver providing clean, slew-controlled signals with defined VOH/VOL (3.8 V/0.44 V at 8 mA) for repeatable parametric testing. Use Value: High noise immunity (V_IL(D) = 0.8 V, V_IH(D) = 2.0 V) maintains vector integrity despite crosstalk in densely wired test fixtures.

Memory Address Buffering

Industrial PLC I/O Expansion

Use Scenario: Driving 16-bit address lines from a microcontroller to multiple SRAM or Flash devices sharing a common data bus.

IC Role / Device Role / Timing Role: Noninverting buffer with 3-state outputs isolates address lines during memory read cycles to prevent bus contention.

Use Value: Dual OE control allows separate enabling of upper/lower address bytes, supporting interleaved memory access patterns without additional logic.

Use Scenario: Interfacing a programmable logic controller CPU module to distributed digital I/O racks via parallel backplane wiring.

IC Role / Device Role / Timing Role: Bidirectional bus driver managing 16-bit status/command words between master and slave modules.

Use Value: Distributed V_CC/GND pins suppress switching noise in electrically noisy factory environments, ensuring reliable communication at 10+ MHz update rates.

Legacy System Bus Interface

Test Equipment Signal Conditioning

Use Scenario: Adapting modern FPGA I/O banks to legacy ISA or VMEbus peripherals requiring 5 V TTL signaling and strict timing margins.

IC Role / Device Role / Timing Role: Level-translating buffer with guaranteed t_PLH/t_PHL ≤ 9.5 ns ensures setup/hold compliance for 25 MHz bus clocks.

Use Value: Flow-through architecture simplifies PCB layout on space-constrained adapter cards, reducing trace length mismatch and skew.

Use Scenario: Routing and conditioning 16-bit parallel test vectors from ATE pattern generators to DUT interface boards.

IC Role / Device Role / Timing Role: Output driver providing clean, slew-controlled signals with defined VOH/VOL (3.8 V/0.44 V at 8 mA) for repeatable parametric testing.

Use Value: High noise immunity (V_IL(D) = 0.8 V, V_IH(D) = 2.0 V) maintains vector integrity despite crosstalk in densely wired test fixtures.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit 3-state buffer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74AHCT16244DGGR	Inverting output polarity; identical pinout, timing, and drive strength.	Requires logic inversion in upstream source or downstream load - unsuitable where signal polarity must be preserved.	Select when system design accommodates inverted data paths or uses complementary buffering stages.
SN74LVC16244ADGGR	Lower V_CC range (1.65–3.6 V); 3.3 V native logic; higher speed (t_PD ≈ 4.2 ns).	Not TTL-compatible; requires level translation for 5 V systems; incompatible with 5 V-only buses.	Choose for new 3.3 V designs prioritizing speed and lower power, not for 5 V legacy interface replacement.

Compared with SN74AHCT16244DGGR and SN74LVC16244ADGGR, the SN74AHCT16541DGGR uniquely provides noninverting 5 V TTL-compatible buffering with dual OE control per byte - making it irreplaceable in systems requiring polarity preservation, 5 V bus interoperability, and independent 8-bit lane gating without redesign.

Availability

SN74AHCT16541DGGR is available at Aetrix Electronics and suitable for industrial PLC backplanes, memory subsystems, and legacy bus adapters requiring stable component supply, long-term obsolescence management, and RoHS-compliant TSSOP packaging.

Supply support for SN74AHCT16541DGGR 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 decades of experience in industrial, automotive, and communications markets.

The SN74AHCT16541DGGR belongs to TI's Widebus™ family of high-speed, low-noise bus interface ICs - engineered specifically for robust 5 V parallel data path management in noise-sensitive industrial and computing systems.

FAQ

What is the recommended power-up sequence for SN74AHCT16541DGGR to avoid output contention?

To ensure high-impedance state during power-up, tie all OE inputs (1OE1, 1OE2, 2OE1, 2OE2) to V_CC through a pullup resistor. Minimum resistance is determined by the driver's current-sinking capability - typically 4.7 kΩ suffices for most 5 V systems. This guarantees outputs remain in high-Z until firmware asserts valid OE states, preventing bus conflicts on SN74AHCT16541DGGR-powered systems.

Can SN74AHCT16541DGGR drive a 50 pF load at 25 MHz without signal degradation?

Yes. At V_CC = 5 V and C_L = 50 pF, SN74AHCT16541DGGR specifies t_PLH/t_PHL ≤ 10.5 ns and t_PZH/t_PHZ ≤ 13 ns - supporting clean 25 MHz toggling (40 ns period) with >20 ns setup/hold margin. Its ±8 mA drive strength and low output capacitance (3 pF) maintain edge integrity across typical PCB traces when used with SN74AHCT16541DGGR in production designs.

Is SN74AHCT16541DGGR compatible with 3.3 V microcontroller GPIOs?

No - SN74AHCT16541DGGR requires 4.5–5.5 V V_CC and has TTL-compatible inputs (V_IH ≥ 2.0 V), but its outputs swing rail-to-rail (0 V to V_CC). Direct connection to 3.3 V-only inputs risks overvoltage damage. Use level-shifting circuitry or select SN74LVC16244ADGGR instead. SN74AHCT16541DGGR is strictly a 5 V interface device.

How does the dual-OE architecture of SN74AHCT16541DGGR improve bus arbitration versus single-OE buffers?

Each 8-bit section of SN74AHCT16541DGGR requires both OE inputs low to activate - enabling hierarchical control (e.g., one OE for chip-select, another for function-enable). This allows finer-grained bus partitioning than single-OE parts, reducing contention windows and simplifying timing in multi-master systems. The architecture is intrinsic to SN74AHCT16541DGGR's design and documented in its function table.

Does SN74AHCT16541DGGR support hot-swap or live-insertion in backplane applications?

While SN74AHCT16541DGGR exceeds JESD 17 latch-up immunity (250 mA), it lacks explicit hot-swap protection features like slew-rate limiting or undervoltage lockout. For live-insertion, add series current-limiting resistors and ensure OE is held inactive until power stabilizes. TI does not characterize SN74AHCT16541DGGR for hot-swap - use only with external safeguards in such applications.

SN74AHCT16541DGGR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74AHCT

Package/Case:: 48-TFSOP (0.240", 6.10mm 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-TSSOP

SN74AHCT16541DGGR FAQ

1.How can I place an order for SN74AHCT16541DGGR through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74AHCT16541DGGR 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 SN74AHCT16541DGGR reliable?

The price and inventory of SN74AHCT16541DGGR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHCT16541DGGR is usually 5 days.

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We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AHCT16541DGGR transactions.

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SN74AHCT16541DGGR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74AHCT16541DGGR 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 SN74AHCT16541DGGR?

For technical support, including SN74AHCT16541DGGR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHCT16541DGGR requirements.

6.How does Aetrix verify that SN74AHCT16541DGGR is sourced from the original manufacturer or authorized distributors?

All SN74AHCT16541DGGR 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 SN74AHCT16541DGGR meets industry standards.

7.What is the process for return or replacement of SN74AHCT16541DGGR?

All SN74AHCT16541DGGR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHCT16541DGGR, 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 SN74AHCT16541DGGR part is unused and in its original packaging.

Return procedure for SN74AHCT16541DGGR:

1.Submit a request within 90 days.

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

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