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Texas Instruments 74ACT16541DLG4
- Part No.:
- 74ACT16541DLG4
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
74ACT16541DLG4.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,178
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Product details
Overview
74ACT16541DLG4 from Texas Instruments is a 16-bit noninverting buffer/driver IC with dual 3-state output-enable control per 8-bit section, designed for high-speed TTL-compatible bus interfacing in industrial and embedded systems. It operates from 4.5 V to 5.5 V, delivers ±24 mA drive strength, supports –40°C to 85°C temperature range, and features flow-through pinout in 48-pin SSOP (DL) package.
For engineers reviewing the 74ACT16541DLG4 datasheet, 74ACT16541DLG4 pinout, 74ACT16541DLG4 application, or 74ACT16541DLG4 equivalent, key selection criteria include dual independent 3-state enable logic, 5-V ACT-family speed/power balance, distributed VCC/GND layout support, and compatibility with legacy Widebus™-based backplane and memory interface designs.
Technical Context
The 74ACT16541DLG4 implements two independent 8-bit noninverting buffer sections, each requiring both OE inputs (e.g., 1OE1 and 1OE2) low to activate outputs - enabling granular bus segment control. Its EPIC™ 1-µm CMOS process ensures 500-mA latch-up immunity at 125°C and TTL-voltage-compatible inputs (VIL ≤ 0.8 V, VVIH ≥ 2 V).
Switching performance is characterized at VCC = 5 V: tPLH/tPHL ≤ 9 ns, tPZL/tPHZ ≤ 11 ns, with power dissipation capacitance of 40 pF (outputs enabled) and 9.5 pF (outputs disabled), supporting low-noise, high-density PCB layouts via distributed VCC/GND pins and flow-through architecture.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Logic Family | ACT (Advanced CMOS TTL-compatible), 5-V supply only |
| Output Drive | ±24 mA per output - sufficient to drive 50-Ω transmission lines or multiple TTL loads |
| Propagation Delay | ≤ 9 ns (A→Y), ≤ 11 ns (OE→Y) - enables sub-100-MHz bus operation |
| Operating Temperature | –40°C to +85°C - qualified for commercial/industrial ambient environments |
| Input Compatibility | TTL-level inputs (VIL ≤ 0.8 V, VVIH ≥ 2 V) - interoperable with legacy 74LS/74F systems |
| Package | 48-pin Shrink Small-Outline Package (SSOP-DL), 300-mil width, 25-mil pitch - 2× I/O density vs standard SOIC |
| ESD/Latch-up | ≥ 500 mA latch-up immunity at 125°C - robust against transient-induced failure in noisy systems |
Pinout & Package
48-pin Shrink Small-Outline Package (SSOP-DL), 300-mil body width, 25-mil center-to-center pin spacing, RoHS-compliant NiPdAu lead finish, MSL Level-1 (260°C peak reflow, unlimited floor life).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 24, 25, 48 | Output Enable (1OE1, 1OE2, 2OE1, 2OE2) | Active-low dual enables per 8-bit section - both must be low for Y outputs to drive; enables bus isolation granularity |
| 2–9, 36–43 | Inputs (1A1–1A8, 2A1–2A8) | TTL-compatible data inputs - accept 0.8 V / 2 V thresholds without level-shifting |
| 10–11, 13–20, 26–27, 29–34 | Outputs (1Y1–1Y8, 2Y1–2Y8) | 3-state buffered outputs - high-Z when any OE is high, reducing bus contention risk |
| 4, 6, 12, 15, 18, 21, 23, 30, 35, 38, 41, 44, 46, 47 | GND / VCC | Distributed power/ground pins - minimize simultaneous switching noise and improve signal integrity |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through pinout architecture | Input and output pins aligned on opposite sides - simplifies layer routing and reduces trace crossovers on dense PCBs |
| Dual independent 3-state control per 8-bit section | Two OE inputs per section require logical AND condition - allows selective activation of half-bus segments |
| EPIC™ 1-µm CMOS process | Enables 500-mA latch-up immunity and stable operation up to 125°C junction temperature |
| Distributed VCC/GND pin configuration | 14 dedicated power/ground terminals across 48-pin layout - lowers impedance path and suppresses ground bounce |
| TTL-input voltage compatibility | Accepts standard 74LS/74F logic levels directly - eliminates need for external level translators in mixed-logic systems |
Applications
| Backplane Data Bus Interface | Memory Address/Data Buffering |
|---|---|
Use Scenario: Isolating and driving parallel address/data lines between CPU and peripheral cards in modular industrial backplanes. IC Role / Device Role / Timing Role: Noninverting 16-bit buffer with dual 3-state enables - provides direction-controlled, low-skew signal regeneration across long traces. Use Value: Flow-through pinout and distributed power pins reduce timing skew and crosstalk, enabling reliable 20+ MHz bus operation without termination. | Use Scenario: Driving multiplexed address and data buses between microcontroller and SRAM/Flash in space-constrained embedded controllers. IC Role / Device Role / Timing Role: High-drive 16-bit buffer with independent section enables - allows dynamic partitioning of memory access windows. Use Value: ±24 mA drive strength sustains signal integrity across 10+ cm traces; 9 ns propagation delay supports >50 MHz CPU clock domains. |
| Legacy System Logic Migration | Industrial PLC I/O Expansion Module |
Use Scenario: Replacing obsolete 74F244 or 74AS244 buffers in aging test equipment while maintaining pin-compatible footprint and timing. IC Role / Device Role / Timing Role: Drop-in ACT-family upgrade - matches TTL input thresholds and 5-V operation of legacy designs. Use Value: Identical 48-pin DL package and function table allow direct replacement without PCB revision; lower ICC improves thermal margin. | Use Scenario: Interfacing field-side digital I/O signals to isolated controller buses in programmable logic controllers. IC Role / Device Role / Timing Role: Robust 16-bit bus driver with high latch-up immunity - withstands ESD and surge events common in factory-floor environments. Use Value: 500-mA latch-up rating at 125°C ensures reliability under sustained overvoltage transients; wide temp range supports uncooled enclosures. |
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 |
|---|---|---|---|
| SN74ACT16244DLR | Same 48-pin DL package, but uses single OE per 4-bit group (4 enables total); higher ICC (max 120 µA vs 80 µA) | Less granular enable control - suitable for simpler bus segmentation where per-4-bit gating suffices | Select when finer-grained 8-bit section control is unnecessary and cost-per-enable is prioritized |
| 74LVCH16244ADLGR | 3.3-V tolerant, dual-supply capable (1.65–3.6 V core, 3.6 V I/O), 48-pin DL, but not TTL-input compatible | Requires level translation for 5-V TTL systems; optimized for low-voltage portable/embedded use | Select only in new 3.3-V designs; incompatible with direct 5-V TTL input interfaces |
Compared with SN74ACT16244DLR and 74LVCH16244ADLGR, the 74ACT16541DLG4 uniquely provides dual OE per 8-bit section for precise bus partitioning, maintains full TTL input compatibility without translation, and delivers the highest latch-up immunity in its class - making it optimal for industrial backplane upgrades and legacy system sustainment.
Availability
74ACT16541DLG4 is available at Aetrix Electronics and suitable for industrial automation, legacy system repair, and embedded controller design requiring stable component supply and long-term obsolescence management.
Supply support for 74ACT16541DLG4 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 heritage in industrial-grade logic families.
The 74ACT16541DLG4 belongs to TI's Widebus™ family - engineered specifically for high-speed, low-noise parallel bus interfacing in backplane, memory, and control applications where signal integrity and thermal robustness are critical.
FAQ
What is the operating voltage range for the 74ACT16541DLG4?
The 74ACT16541DLG4 operates over a supply voltage range of 4.5 V to 5.5 V, with recommended nominal VCC = 5 V. It is not rated for 3.3-V operation, and applying voltages outside this range may cause permanent damage or undefined behavior. The device's TTL-compatible inputs function correctly within this 5-V window, ensuring interoperability with legacy 74LS and 74F logic families.
How does the dual output-enable logic work on the 74ACT16541DLG4?
The 74ACT16541DLG4 divides its 16-bit functionality into two independent 8-bit sections, each controlled by two active-low output-enable inputs (e.g., 1OE1 and 1OE2 for Section 1). Both enables must be low simultaneously for that section's outputs to drive; if either is high, all eight outputs enter high-impedance state. This AND-gated enable scheme enables precise bus segment isolation without external logic.
Is the 74ACT16541DLG4 pin-compatible with other 48-pin DL-package buffers?
The 74ACT16541DLG4 uses the standard 48-pin Shrink Small-Outline Package (DL) footprint defined by Texas Instruments, matching mechanical dimensions and pin pitch (25-mil) of SN74ACT16244DLR and 74LVCH16244ADLGR. However, pin functions differ - especially OE and I/O assignments - so electrical compatibility requires verification against the specific function table and signal mapping of the target design.
What is the maximum output current drive capability of the 74ACT16541DLG4?
The 74ACT16541DLG4 delivers ±24 mA per output under recommended conditions (VCC = 5.5 V, TA = 25°C), supporting direct drive of multiple TTL loads or 50-Ω transmission lines. Absolute maximum ratings permit short-duration ±75 mA pulses (≤10 ms), but sustained operation above ±24 mA risks exceeding thermal limits or violating VOL/VOH specs. Total package current is limited to ±400 mA across all pins.
Does the 74ACT16541DLG4 support hot-swap or live-insertion applications?
The 74ACT16541DLG4 is not explicitly characterized for hot-swap operation. While its 3-state outputs and high latch-up immunity (500 mA at 125°C) provide inherent robustness, it lacks integrated slew-rate control, hot-swap biasing circuitry, or IEC 61000-4-2 ESD certification beyond standard HBM (≥2 kV). For live-insertion, external current-limiting resistors and sequencing controls are recommended to prevent bus contention during insertion.
74ACT16541DLG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ACT
- Package/Case:
- 48-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tube
- 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:
- 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
74ACT16541DLG4 FAQ
1.How can I place an order for 74ACT16541DLG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ACT16541DLG4 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 74ACT16541DLG4 reliable?
The price and inventory of 74ACT16541DLG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ACT16541DLG4 is usually 5 days.
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4.How is shipping managed for 74ACT16541DLG4?
74ACT16541DLG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ACT16541DLG4 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 74ACT16541DLG4?
For technical support, including 74ACT16541DLG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ACT16541DLG4 requirements.
6.How does Aetrix verify that 74ACT16541DLG4 is sourced from the original manufacturer or authorized distributors?
All 74ACT16541DLG4 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 74ACT16541DLG4 meets industry standards.
7.What is the process for return or replacement of 74ACT16541DLG4?
All 74ACT16541DLG4 units undergo pre-shipment inspection (PSI). If there is an issue with 74ACT16541DLG4, 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 74ACT16541DLG4 part is unused and in its original packaging.
Return procedure for 74ACT16541DLG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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