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Texas Instruments 74ACT16541DLR
- Part No.:
- 74ACT16541DLR
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
74ACT16541DLR.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,565
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Product details
Overview
74ACT16541DLR from Texas Instruments is a 16-bit noninverting buffer/driver IC with dual 3-state output-enable control per 8-bit section, TTL-compatible inputs, 5-V supply operation, ±24-mA drive strength, and 3.1–9.2-ns propagation delay. It serves as a high-speed bus interface and data isolation component in industrial backplanes and memory expansion subsystems.
For engineers reviewing the 74ACT16541DLR datasheet, 74ACT16541DLR pinout, 74ACT16541DLR application, or 74ACT16541DLR equivalent, key selection criteria include 3-state output timing (tPZH/tPLZ ≤ 9.7 ns), latch-up immunity (500 mA at 125°C), flow-through pinout for PCB signal integrity, and SSOP-48 package compatibility with high-density routing.
Technical Context
The 74ACT16541DLR implements two independent 8-bit buffer sections, each requiring both OE1 and OE2 inputs low to enable outputs; either OE high forces that section's Y outputs into high-impedance state. Its EPIC™ 1-µm CMOS process delivers rail-to-rail output swing and TTL-level input thresholds (VIL = 0.8 V, VIH = 2 V).
Distributed VCC/GND pins across the 48-pin SSOP package minimize simultaneous switching noise, while the flow-through architecture aligns inputs on one side and outputs on the opposite side-reducing layer transitions and crosstalk in multilayer PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - supports standard 5-V logic rails with ±10% tolerance |
| Output Drive | ±24 mA - sufficient to drive 50-pF loads at 10-MHz toggle rates without waveform degradation |
| Propagation Delay | 3.1–9.2 ns - enables sub-100-MHz bus operation with deterministic timing margins |
| Input Compatibility | TTL-voltage - interfaces directly with legacy 74LS/74ALS logic without level-shifting |
| Latch-Up Immunity | 500 mA at 125°C - meets stringent industrial reliability requirements under ESD and surge stress |
| Operating Temperature | –40°C to +85°C - qualified for extended commercial and industrial ambient environments |
| Power Dissipation | 1.2 W max (TA = 55°C) - defines thermal derating limits for continuous operation in enclosed enclosures |
Pinout & Package
74ACT16541DLR is housed in a 48-pin Shrink Small-Outline Package (SSOP-DL), 300-mil body width, 0.025-in pitch, RoHS-compliant NiPdAu lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 24, 25, 48 | 1OE1, 1OE2, 2OE1, 2OE2 | Active-low enable controls for two independent 8-bit sections - dual-OE architecture prevents partial bus contention |
| 2–9, 36–43 | 1A1–1A8, 2A1–2A8 | Noninverting input signals - mapped to corresponding Y outputs with no polarity inversion |
| 10–11, 13–20, 26–27, 29–34 | 1Y1–1Y8, 2Y1–2Y8 | 3-state buffered outputs - high-impedance when respective OE pair is not both asserted |
| 4, 12, 18, 23, 30, 35, 41, 47 | GND | Distributed ground terminals - reduce ground bounce and improve noise margin during fast switching |
| 7, 16, 22, 32, 39, 45 | VCC | Distributed power terminals - lower impedance supply path and suppress VCC droop across wide bus |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through pinout | Inputs on left/right edges and outputs on opposite side - eliminates layer jumps and improves signal routing efficiency |
| Dual OE per 8-bit section | Independent control of two 8-bit groups - enables selective bus gating without external logic |
| EPIC™ process technology | 1-µm CMOS with implanted wells - achieves 500-mA latch-up immunity and stable operation up to 125°C junction |
| TTL-input compatibility | VIL ≤ 0.8 V, VIH ≥ 2 V - ensures interoperability with legacy bipolar logic families |
| Distributed VCC/GND | 6 VCC and 8 GND pins - reduces simultaneous switching noise by >6 dB compared to single-rail SSOP packages |
Applications
| Memory Expansion Interface | Industrial Backplane Driver |
|---|---|
Use Scenario: Adding SRAM or Flash modules to microcontroller-based PLC I/O cards with shared address/data buses. IC Role / Device Role / Timing Role: Bidirectional bus buffer isolating CPU from peripheral memory, enabling 3-state arbitration during DMA cycles. Use Value: Propagation delay ≤9.2 ns ensures setup/hold compliance at 20-MHz bus clocks; dual OE allows independent enable of upper/lower memory banks. | Use Scenario: Driving parallel control signals across 200-mm backplane traces in modular test equipment racks. IC Role / Device Role / Timing Role: Signal repeater and fanout driver for TTL-level control lines (e.g., reset, interrupt, strobe) between slots. Use Value: ±24-mA drive capability maintains signal integrity over 15-cm FR-4 traces; distributed power pins suppress crosstalk between adjacent channels. |
| Legacy System Bus Isolation | High-Density FPGA I/O Expansion |
Use Scenario: Interfacing modern FPGA I/O banks to legacy ISA or VMEbus peripherals operating at 5 V. IC Role / Device Role / Timing Role: Level-translating buffer with 3-state control, decoupling FPGA voltage domain from 5-V bus transceivers. Use Value: TTL-compatible inputs accept 5-V logic directly; tPZH ≤9.7 ns guarantees clean enable/disable transitions during bus arbitration windows. | Use Scenario: Expanding I/O count on Xilinx Artix-7 FPGA carrier boards where native bank voltage differs from 5-V peripheral logic. IC Role / Device Role / Timing Role: Parallel output expander providing additional 16-bit 5-V-tolerant GPIO for sensor/motor control interfaces. Use Value: Flow-through pinout simplifies breakout routing from BGA FPGA to through-hole headers; 500-mA latch-up immunity protects against field-induced faults. |
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 |
|---|---|---|---|
| SN74ACT16541DGGR | Same function, 48-pin TSSOP package (0.5-mm pitch), identical AC/DC specs, but thinner profile (1.2-mm height vs. DL's 2.0-mm) | Better suited for space-constrained designs where board height is limited; requires requalification of solder paste volume and reflow profile | Select SN74ACT16541DGGR when footprint area is constrained and vertical clearance <1.5 mm is required. |
| 74ACT16244DLR | Inverting output logic (vs. noninverting), otherwise identical pinout, timing, and drive strength; shares same EPIC process and temperature range | Required only when system-level logic polarity mandates inversion - e.g., active-low enable chains or complemented bus protocols | Choose 74ACT16244DLR only if inverting behavior matches upstream/downstream signal polarity requirements. |
Compared with SN74ACT16541DGGR and 74ACT16244DLR, the 74ACT16541DLR offers optimal PCB layout efficiency via its flow-through SSOP-DL pinout and noninverting logic-critical for minimizing trace length in high-speed backplane interconnects.
Availability
74ACT16541DLR is available at Aetrix Electronics and suitable for industrial automation controllers, test equipment backplanes, and legacy bus interface modules requiring stable component supply and long-term obsolescence management.
Supply support for 74ACT16541DLR 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 for industrial, automotive, and communications markets since 1930.
The 74ACT16541DLR belongs to TI's Widebus™ family of high-speed logic ICs, engineered specifically for robust 5-V bus interfacing, noise-immune PCB layout, and reliable operation in harsh industrial environments.
FAQ
What is the maximum operating temperature range for the 74ACT16541DLR?
The 74ACT16541DLR is characterized for operation from –40°C to +85°C. This extended commercial temperature range supports deployment in industrial control cabinets, factory-floor instrumentation, and outdoor telecom infrastructure where ambient temperatures exceed standard commercial limits. The EPIC™ process ensures parametric stability across this full range without derating.
Does the 74ACT16541DLR require external pull-up or pull-down resistors on unused inputs?
Yes - per TI's recommended operating conditions, all unused inputs on the 74ACT16541DLR must be held statically high or low to prevent floating states that could cause excessive ICC current or undefined output behavior. TI specifies this requirement explicitly in Note 3 of the SCAS208A datasheet to ensure predictable 3-state control and avoid shoot-through current paths.
Can the 74ACT16541DLR drive a 50-pF load at 10 MHz without signal degradation?
Yes - the 74ACT16541DLR delivers ±24 mA output drive and exhibits typical propagation delays of 3.1–9.2 ns at 5 V, enabling clean 10-MHz square-wave transmission into 50-pF loads. Its power dissipation capacitance (Cpd) is specified at 40 pF per buffer when enabled, confirming stable high-frequency performance without excessive dynamic power draw or edge rounding.
Is the 74ACT16541DLR pin-compatible with the 74ACT16244DLR?
No - although both are 48-pin SSOP buffers from TI's ACT family, the 74ACT16541DLR is noninverting while the 74ACT16244DLR is inverting. Their pinouts differ: 74ACT16244DLR maps inverted outputs to pins 10–17 and 26–33, whereas 74ACT16541DLR places noninverted outputs at those locations. Substitution requires logic-level verification and may necessitate PCB redesign.
What does the "DL" in 74ACT16541DLR signify?
The "DL" in 74ACT16541DLR denotes Texas Instruments' Shrink Small-Outline Package (SSOP) variant with 48 pins, 300-mil body width, and 0.025-inch center-to-center pin pitch. This package provides double the I/O density of standard SOIC while maintaining compatibility with automated SMT assembly processes and offering superior thermal and electrical performance versus older plastic DIP or SOIC formats.
74ACT16541DLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ACT
- 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:
- 24mA, 24mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-SSOP
74ACT16541DLR FAQ
1.How can I place an order for 74ACT16541DLR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ACT16541DLR 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 74ACT16541DLR reliable?
The price and inventory of 74ACT16541DLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ACT16541DLR is usually 5 days.
3.What payment methods are accepted for 74ACT16541DLR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ACT16541DLR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ACT16541DLR?
74ACT16541DLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ACT16541DLR 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 74ACT16541DLR?
For technical support, including 74ACT16541DLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ACT16541DLR requirements.
6.How does Aetrix verify that 74ACT16541DLR is sourced from the original manufacturer or authorized distributors?
All 74ACT16541DLR 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 74ACT16541DLR meets industry standards.
7.What is the process for return or replacement of 74ACT16541DLR?
All 74ACT16541DLR units undergo pre-shipment inspection (PSI). If there is an issue with 74ACT16541DLR, 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 74ACT16541DLR part is unused and in its original packaging.
Return procedure for 74ACT16541DLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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