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Texas Instruments SN74AHCT16541DGVR
- Part No.:
- SN74AHCT16541DGVR
- Manufacturer:
- Texas Instruments
- Package:
- 48-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74AHCT16541DGVR.pdf
- Description:
- IC BUF NON-INVERT 5.5V 48TVSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,569
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Product details
Overview
SN74AHCT16541DGVR from Texas Instruments is a noninverting 16-bit buffer/driver with dual 3-state output-enable control per 8-bit section, operating at 4.5–5.5 V, supporting ±8 mA drive strength, and characterized for –40°C to 85°C. It enables bidirectional data buffering in high-density memory address/data bus interfaces.
For engineers reviewing the SN74AHCT16541DGVR datasheet, SN74AHCT16541DGVR pinout, SN74AHCT16541DGVR application, or SN74AHCT16541DGVR equivalent, key selection criteria include TTL-compatible inputs, distributed VCC/GND pins for noise suppression, flow-through pinout for PCB layout optimization, and guaranteed 3-state isolation during power sequencing.
Technical Context
The SN74AHCT16541DGVR implements two independent 8-bit noninverting buffers, each with two active-low output-enable inputs (e.g., 1OE1 and 1OE2) requiring both low to activate outputs; either high forces high-impedance state. Its EPIC™ CMOS process ensures TTL-voltage compatibility on all inputs.
Distributed VCC and GND pins across the 48-pin TVSOP package reduce simultaneous switching noise, while the flow-through architecture aligns inputs and outputs on opposite sides to minimize trace crossovers. Latch-up performance exceeds 250 mA per JESD 17.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures stable operation across industrial-grade 5 V rails with ±10% tolerance. |
| Input Voltage Compatibility | TTL-level (VIL ≤ 0.8 V, VVIH ≥ 2 V) - Directly interfaces legacy 5 V TTL logic without level shifters. |
| Output Drive Strength | ±8 mA at VCC = 4.5 V - Sufficient to drive 50 pF loads with <9.5 ns propagation delay (tPLH/tPHL). |
| 3-State Enable Logic | AND-gated dual OE (e.g., 1OE1 AND 1OE2) - Prevents partial output activation and reduces bus contention risk. |
| Propagation Delay | 1 ns to 10.5 ns (CL = 15–50 pF) - Supports 100+ MHz bus timing margins in synchronous systems. |
| Power Dissipation Capacitance | 12 pF - Enables accurate dynamic power estimation at 1 MHz switching frequency. |
| Operating Temperature | –40°C to +85°C - Qualified for industrial ambient environments without derating. |
Pinout & Package
SN74AHCT16541DGVR uses a 48-pin Thin Very Small-Outline Package (TVSOP, DGV), 7.1 mm × 4.4 mm body, 0.4 mm pitch, 1.2 mm max height, JEDEC MO-153 compliant, with exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE1, 1OE2, 2OE1, 2OE2 | Active-low 3-state enable inputs (per 8-bit section) | Both enables must be low for corresponding Y outputs to drive; any high forces high-Z - prevents bus conflicts during partial enable. |
| 1A1–1A8, 2A1–2A8 | Noninverting input terminals | Directly pass logic states to outputs; TTL-compatible thresholds eliminate need for external biasing. |
| 1Y1–1Y8, 2Y1–2Y8 | Buffered noninverting outputs | Drive external loads with controlled edge rates; high-Z state isolates bus segments during disable. |
| VCC (Pins 7, 18, 25, 36, 47) | Power supply connections | Distributed across package to minimize IR drop and suppress simultaneous switching noise on wide buses. |
| GND (Pins 4, 10, 15, 22, 29, 33, 40, 44) | Ground return paths | Eight dedicated GND pins provide low-inductance return for all 16 drivers, critical for signal integrity at >20 MHz. |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through pinout architecture | Inputs on one side, outputs on opposite side - eliminates layer jumps and vias in dense PCB layouts. |
| Dual-output-enable per 8-bit section | Independent control of two 8-bit groups - enables selective bus gating without full device disable. |
| EPIC™ process technology | Enhanced-Performance Implanted CMOS - delivers TTL-compatible inputs with CMOS power efficiency and noise immunity. |
| Distributed VCC/GND pinning | Five VCC and eight GND pins - reduces ground bounce and supply rail collapse during 16-bit parallel switching. |
| Power-up/down high-Z guarantee | Pullup OE to VCC ensures outputs remain high-impedance until valid enable signals are applied - prevents bus contention at power-on. |
Applications
| Memory Address Buffering | Parallel Bus Isolation |
|---|---|
Use Scenario: Buffering 16-bit address lines between microcontroller and SRAM/Flash in embedded control systems. IC Role / Device Role / Timing Role: Noninverting voltage-level translator and fanout amplifier with deterministic 3-state control for address bus sharing. Use Value: Eliminates timing skew across 16 lines (<1 ns skew), supports 100 MHz address setup/hold margins, and prevents back-driving during memory access arbitration. | Use Scenario: Isolating two 16-bit data buses (e.g., CPU ↔ peripheral, FPGA ↔ ADC) using shared physical traces. IC Role / Device Role / Timing Role: Bidirectional bus driver with AND-gated OE control enabling precise segment enable/disable timing. Use Value: Dual OE per section allows staggered enable sequencing to avoid simultaneous bus transitions, reducing EMI by >6 dB compared to single-OE alternatives. |
| Industrial I/O Expansion | Test Equipment Signal Conditioning |
Use Scenario: Driving 16-bit digital I/O lines from PLC controller to field actuators/sensors over long PCB traces. IC Role / Device Role / Timing Role: Robust buffer with ±25 mA continuous output current rating and latch-up immunity >250 mA. Use Value: Tolerates 50 pF trace capacitance with <10.5 ns delay, maintains signal integrity over 10 cm FR-4 traces, and survives transient coupling in noisy factory environments. | Use Scenario: Level-shifting and driving 16-bit pattern generator outputs into automated test equipment (ATE) load boards. IC Role / Device Role / Timing Role: Precision timing buffer with <1 ns output skew and guaranteed 3-state disable during test vector loading. Use Value: Enables sub-nanosecond edge alignment across all 16 channels, critical for high-speed digital pattern validation at 100+ Mbps. |
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 |
|---|---|---|---|
| SN74AHCT16244DGVR | Inverting output polarity; identical pinout, timing, and drive specs. | Requires logic inversion in upstream design; unsuitable where signal polarity must be preserved. | Select only when system-level inversion is acceptable or compensated elsewhere in the signal chain. |
| SN74LVC16244ADGVR | Lower VCC range (1.65–3.6 V); 3.3 V native logic; no TTL input compatibility. | Cannot interface directly with 5 V TTL sources; requires level translation in mixed-voltage systems. | Prefer for 3.3 V-only designs; avoid in legacy 5 V TTL environments unless translators are added. |
Compared with SN74AHCT16244DGVR and SN74LVC16244ADGVR, the SN74AHCT16541DGVR uniquely preserves signal polarity while maintaining full 5 V TTL interoperability - essential for drop-in replacement in existing industrial bus architectures without redesign.
Availability
SN74AHCT16541DGVR is available at Aetrix Electronics and suitable for memory address buffering, parallel bus isolation, and industrial I/O expansion requiring stable component supply, long-term industrial temperature support, and proven JEDEC MO-153 packaging reliability.
Supply support for SN74AHCT16541DGVR 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 delivering analog, embedded processing, and logic solutions with emphasis on industrial, automotive, and communications applications.
The SN74AHCT16541DGVR belongs to TI's Widebus™ family of high-speed, low-skew bus interface devices, engineered specifically for robust 16-bit parallel data path management in noise-sensitive industrial control and instrumentation systems.
FAQ
What is the recommended power-up sequence for SN74AHCT16541DGVR to ensure outputs remain high-impedance?
To guarantee high-impedance outputs during power-up, tie all output-enable inputs (1OE1, 1OE2, 2OE1, 2OE2) to VCC via pullup resistors. The minimum resistor value depends on the current-sinking capability of the driving source; TI specifies that OE must be held high until valid control signals are established. This behavior is intrinsic to the SN74AHCT16541DGVR's internal structure and applies regardless of VCC ramp rate or sequencing order.
Does SN74AHCT16541DGVR support hot insertion or live bus swapping?
The SN74AHCT16541DGVR is not rated for hot insertion. Its absolute maximum ratings specify VI and VO limits (–0.5 V to VCC + 0.5 V), and no Ioff or power-off protection is documented. Applying signals before VCC stabilization may exceed clamp current limits (±20 mA). For live-swap applications, external protection circuitry or purpose-built hot-swap buffers are required - the SN74AHCT16541DGVR itself does not provide this capability.
Can SN74AHCT16541DGVR drive 50 pF loads at 100 MHz without signal degradation?
Yes - the SN74AHCT16541DGVR is characterized for CL = 50 pF loads with tPLH/tPHL ≤ 10.5 ns and tPZH/tPZL ≤ 13 ns at VCC = 5 V. At 100 MHz (10 ns period), this provides >1 ns timing margin for setup/hold, assuming clean edges and proper termination. However, actual signal integrity depends on PCB layout; TI recommends using the flow-through pinout and distributed VCC/GND to maintain performance - the SN74AHCT16541DGVR's design enables this, but board implementation remains critical.
What is the thermal resistance (θJA) of SN74AHCT16541DGVR in its TVSOP (DGV) package?
The SN74AHCT16541DGVR in the TVSOP (DGV) package has a specified junction-to-ambient thermal resistance (θJA) of 58°C/W under JEDEC JESD 51 conditions. This value assumes standard 2-layer board construction with minimal copper pour. With adequate PCB copper area (e.g., 1-in² thermal pad connected to internal planes), actual θJA can improve to ~40°C/W - sufficient for typical industrial operation where ICC ≤ 40 µA static and dynamic dissipation remains below 150 mW at 10 MHz toggle rate.
How does the dual-output-enable architecture of SN74AHCT16541DGVR improve bus reliability compared to single-OE buffers?
The dual-OE per 8-bit section (e.g., 1OE1 AND 1OE2) in the SN74AHCT16541DGVR enforces strict logical AND control: both enables must be asserted to drive outputs. This prevents unintended partial activation due to noise glitches or incomplete control signal settling. In contrast, single-OE buffers risk momentary bus contention if OE transitions asynchronously with data - a failure mode eliminated by the SN74AHCT16541DGVR's architecture, enhancing reliability in electrically noisy industrial settings.
SN74AHCT16541DGVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHCT
- Package/Case:
- 48-TFSOP (0.173", 4.40mm 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-TVSOP
SN74AHCT16541DGVR FAQ
1.How can I place an order for SN74AHCT16541DGVR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHCT16541DGVR 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 SN74AHCT16541DGVR reliable?
The price and inventory of SN74AHCT16541DGVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHCT16541DGVR is usually 5 days.
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SN74AHCT16541DGVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AHCT16541DGVR 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 SN74AHCT16541DGVR?
For technical support, including SN74AHCT16541DGVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHCT16541DGVR requirements.
6.How does Aetrix verify that SN74AHCT16541DGVR is sourced from the original manufacturer or authorized distributors?
All SN74AHCT16541DGVR 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 SN74AHCT16541DGVR meets industry standards.
7.What is the process for return or replacement of SN74AHCT16541DGVR?
All SN74AHCT16541DGVR units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHCT16541DGVR, 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 SN74AHCT16541DGVR part is unused and in its original packaging.
Return procedure for SN74AHCT16541DGVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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