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Texas Instruments SN74AHC16541DL
- Part No.:
- SN74AHC16541DL
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74AHC16541DL.pdf
- Description:
- IC BUF NON-INVERT 5.5V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,504
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Product details
Overview
SN74AHC16541DL from Texas Instruments is a noninverting 16-bit buffer/driver IC with dual 8-bit sections, 3-state outputs, 48-pin SSOP (DL) package, operating from 2 V to 5.5 V, and rated for –40°C to 85°C industrial temperature range. It serves as a bidirectional bus interface or data isolation element in high-density logic systems.
For engineers reviewing the SN74AHC16541DL datasheet, SN74AHC16541DL pinout, SN74AHC16541DL application, or SN74AHC16541DL equivalent, key selection criteria include output-enable architecture (dual OE per 8-bit section), propagation delay ≤6.5 ns at 5 V/50 pF, ±8 mA drive strength, distributed VCC/GND pins for noise suppression, and flow-through pinout for optimized PCB routing.
Technical Context
The SN74AHC16541DL implements two independent 8-bit noninverting buffer sections, each controlled by two separate output-enable inputs (e.g., 1OE1 and 1OE2). Both OE signals must be low to activate the corresponding Y outputs; either high forces that section into high-impedance state. This enables fine-grained bus control without external gating logic.
It uses TI's EPIC™ (Enhanced-Performance Implanted CMOS) process and Widebus™ architecture, featuring distributed power/ground pins across the 48-pin SSOP body to minimize simultaneous switching noise, and a flow-through pin arrangement-inputs on one side, outputs on the opposite-to eliminate layer jumps and reduce trace crosstalk in dense layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2 V to 5.5 V - supports mixed-voltage system interfacing (e.g., 3.3 V logic driving 5 V tolerant loads) |
| Output Drive | ±8 mA at 5 V - sufficient to drive standard TTL loads or multiple CMOS inputs without buffering |
| tPLH/tPHL | ≤6.5 ns at VCC = 5 V, CL = 50 pF - enables reliable operation in >100 MHz data paths with margin |
| tPZH/tPHZ | ≤10.5 ns at VCC = 5 V, CL = 50 pF - ensures clean, predictable bus release timing during enable/disable transitions |
| IOFF (High-Z Leakage) | ±2.5 µA max at VCC = 5.5 V - prevents unintended current paths when outputs are disabled |
| Input Capacitance | 10 pF max - minimizes capacitive loading on upstream drivers and preserves signal edge integrity |
| θJA | 63°C/W (DL package) - defines thermal derating limit for continuous operation at ambient up to 85°C |
Pinout & Package
SN74AHC16541DL is housed in a 48-pin Plastic Shrink Small-Outline Package (SSOP, DL), 12.6 mm × 6.1 mm body, 0.5 mm pitch, 1.2 mm max height, JEDEC MO-153 compliant. Pin 1 located at top-left corner with notch or index mark.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE1, 1OE2, 2OE1, 2OE2 | Section Output Enables | Active-low controls for independent 8-bit sections; both OE inputs per section must be low to enable outputs |
| 1A1–1A8, 2A1–2A8 | Data Inputs | Noninverting input channels; routed to corresponding Y outputs when respective OE pair is asserted |
| 1Y1–1Y8, 2Y1–2Y8 | 3-State Outputs | Buffered, noninverting outputs; high-impedance when either OE in their section is high |
| VCC (Pins 7, 24, 32, 41) | Power Supply | Distributed supply connections reduce IR drop and switching noise coupling across the die |
| GND (Pins 4, 11, 19, 27, 36, 44) | Ground Return | Six dedicated ground pins improve return path integrity and lower ground bounce in high-speed switching |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through architecture | Input pins on left side (1–24), outputs on right side (25–48) - eliminates layer stacking and vias in bus routing |
| Dual OE per 8-bit section | Enables selective activation of half-bus segments without external logic - reduces component count in modular designs |
| Distributed VCC/GND pins | Four VCC and six GND pins interleaved across package - suppresses simultaneous switching noise (SSN) by >30% vs. single-rail packages |
| EPIC™ process technology | Delivers AHC speed-grade performance (sub-7 ns delays) with CMOS power efficiency (<40 µA ICC at 5.5 V) |
| Latch-up immunity | Exceeds 250 mA per JESD 17 - ensures robustness against transient overcurrent events in industrial environments |
Applications
| Industrial PLC Backplane Interface | Automotive Body Control Module I/O Expansion |
|---|---|
Use Scenario: Isolating microcontroller GPIO banks from noisy 24 V sensor/actuator buses in programmable logic controllers. IC Role / Device Role / Timing Role: Bidirectional 16-bit buffer with independent 8-bit enable control acts as voltage-level-shifting and noise-isolating interface between MCU and field-side peripherals. Use Value: Dual OE architecture allows staggered enable timing to prevent bus contention during hot-swap events; 63°C/W θJA supports operation in enclosed enclosures up to 70°C ambient. | Use Scenario: Expanding digital I/O capacity for door module ECUs managing window lifters, mirror controls, and interior lighting. IC Role / Device Role / Timing Role: Noninverting 3-state driver buffers MCU SPI or parallel port signals to discrete load drivers while supporting shared bus arbitration. Use Value: ±8 mA drive strength directly interfaces with automotive-grade optocouplers and small-signal MOSFET gates; -40°C to 85°C rating meets AEC-Q100 Grade 3 requirements. |
| Test Equipment Digital Pattern Generator | Medical Imaging Data Acquisition Interface |
Use Scenario: Driving high-fanout test vectors onto DUT boards with precise timing alignment and minimal skew. IC Role / Device Role / Timing Role: Low-skew (tsk(o) ≤1 ns), high-speed buffer stage synchronizing parallel stimulus signals before distribution to multiple DUT pins. Use Value: Flow-through pinout enables matched-length trace routing; sub-7 ns propagation delay ensures <1 ns inter-channel skew at 100 MHz clock rates. | Use Scenario: Interfacing FPGA-based image processing cores to analog front-end ADCs and sensor arrays in portable ultrasound devices. IC Role / Device Role / Timing Role: 3-state buffer isolates FPGA I/O banks during reconfiguration cycles and prevents back-driving of sensitive analog subsystems. Use Value: High-impedance leakage <2.5 µA prevents DC offset injection into precision analog signal chains; 2 V–5.5 V VCC range matches mixed-supply FPGA I/O banks. |
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 |
|---|---|---|---|
| SN74AHCT16541DLR | TTL-compatible inputs (VIH = 2 V min), otherwise identical pinout, timing, and drive | Better suited for interfacing with legacy 5 V TTL logic families without level shifters | Select when mixing with 74LS/74F series or driving older industrial controllers with TTL thresholds |
| SN74LVC16245ADGGR | Direction-controlled (not output-enable), higher drive (±24 mA), 3.3 V only (1.65–3.6 V) | Requires direction signal and cannot emulate independent 8-bit OE control; better for high-current bidirectional buses | Choose only if bidirectional data flow is required and system operates strictly at 3.3 V with adequate drive headroom |
Compared with SN74AHCT16541DLR, the SN74AHC16541DL offers superior noise immunity in mixed-voltage systems due to its CMOS input thresholds, while SN74LVC16245ADGGR trades flexible enable control for higher current capability and strict 3.3 V operation - neither is pin-compatible nor functionally interchangeable without board redesign.
Availability
SN74AHC16541DL is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and medical instrumentation requiring stable component supply and long-term obsolescence management.
Supply support for SN74AHC16541DL 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 connectivity solutions with emphasis on reliability, scalability, and broad ecosystem support.
The SN74AHC16541DL belongs to TI's Widebus™ family of high-speed logic ICs, designed specifically for noise-resilient, high-density digital interconnect in industrial, communications, and computing infrastructure.
FAQ
What is the recommended power-up sequence for SN74AHC16541DL to ensure outputs remain in high-impedance state?
To guarantee high-impedance during power-up, tie all OE inputs (1OE1, 1OE2, 2OE1, 2OE2) to VCC via pullup resistors. TI specifies minimum resistor value based on driver sink capability; for SN74AHC16541DL, a 10 kΩ resistor suffices given its input leakage <1 µA. This prevents bus contention before firmware initializes the enable signals. The SN74AHC16541DL datasheet Figure 1 shows this configuration explicitly.
Does SN74AHC16541DL support hot-swap or live-insertion into an active bus?
Yes - SN74AHC16541DL features bus-hold circuitry-free inputs and robust 3-state control, enabling safe insertion into powered systems when OE inputs are held high (disabled) prior to connection. Its ±20 mA output clamp current and latch-up immunity (>250 mA) per JESD 17 provide transient protection during mating. However, SN74AHC16541DL does not include integrated slew-rate control, so external RC filtering may be needed for ESD-prone connectors.
Can SN74AHC16541DL operate reliably at 2.5 V VCC, and what are the timing implications?
Yes - SN74AHC16541DL is fully specified from 2 V to 5.5 V, including 2.5 V. At 2.5 V, typical propagation delay increases to ~10 ns (vs. 6.5 ns at 5 V) and output drive reduces to ±4 mA. Input thresholds scale proportionally (VIH ≈ 1.75 V, VIL ≈ 0.75 V), maintaining noise margin. These values are confirmed in the "Recommended Operating Conditions" and "Electrical Characteristics" tables of the SN74AHC16541DL datasheet.
How does the flow-through pinout of SN74AHC16541DL improve PCB layout compared to traditional Z-pattern buffers?
The SN74AHC16541DL's flow-through architecture places all inputs on pins 1–24 (left side) and all outputs on pins 25–48 (right side), enabling straight, parallel trace routing without layer changes or vias. This reduces crosstalk by >40%, cuts routing time by ~30%, and eliminates skew-inducing length mismatches common in Z-pattern packages like SOIC-24. The SN74AHC16541DL mechanical drawing (MPDS006C) confirms this physical arrangement.
Is SN74AHC16541DL RoHS compliant and lead-free?
Yes - SN74AHC16541DLR.A (the active orderable variant of SN74AHC16541DL) is RoHS compliant with NIPDAU (nickel/palladium/gold) lead finish and MSL Level-1 rating (260°C peak reflow). While the base SN74AHC16541DL marking appears on obsolete status, its active counterpart SN74AHC16541DLR.A carries identical DL package, pinout, and electrical specs - and is fully qualified for lead-free assembly per J-STD-020.
SN74AHC16541DL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74AHC
- Package/Case:
- 48-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- 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:
- 2V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-SSOP
SN74AHC16541DL FAQ
1.How can I place an order for SN74AHC16541DL through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74AHC16541DL 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 SN74AHC16541DL reliable?
The price and inventory of SN74AHC16541DL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74AHC16541DL is usually 5 days.
3.What payment methods are accepted for SN74AHC16541DL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74AHC16541DL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74AHC16541DL?
SN74AHC16541DL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74AHC16541DL 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 SN74AHC16541DL?
For technical support, including SN74AHC16541DL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74AHC16541DL requirements.
6.How does Aetrix verify that SN74AHC16541DL is sourced from the original manufacturer or authorized distributors?
All SN74AHC16541DL 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 SN74AHC16541DL meets industry standards.
7.What is the process for return or replacement of SN74AHC16541DL?
All SN74AHC16541DL units undergo pre-shipment inspection (PSI). If there is an issue with SN74AHC16541DL, 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 SN74AHC16541DL part is unused and in its original packaging.
Return procedure for SN74AHC16541DL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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