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Texas Instruments 74ACT16244DL
- Part No.:
- 74ACT16244DL
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
74ACT16244DL.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,078
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Product details
Overview
74ACT16244DL from Texas Instruments is a 16-bit non-inverting buffer/line driver with 3-state outputs, designed for memory address driving, clock distribution, and bus interfacing in industrial and embedded systems. It features true output logic, active-low OE inputs per 4-bit group, ±24 mA drive strength at 5 V, 8.5 ns max propagation delay (A→Y), and operates from –40°C to 85°C.
For engineers reviewing the 74ACT16244DL datasheet, 74ACT16244DL pinout, 74ACT16244DL application, or 74ACT16244DL equivalent, this device serves as a high-density, flow-through-architecture solution for TTL-compatible bus buffering where low skew, noise-immune layout, and 3-state bus control are critical.
Technical Context
The 74ACT16244DL implements four independent 4-bit buffer sections, each with dedicated active-low output-enable (OE) control, enabling flexible segmentation of 16-bit data paths. Its EPIC™ (Enhanced-Performance Implanted CMOS) 1-μm process delivers TTL-voltage-compatible inputs (VIH = 2 V, VIL = 0.8 V) and rail-to-rail output swing (VOH ≥ 4.94 V, VOL ≤ 0.44 V at 24 mA).
It uses distributed VCC/GND pin configuration across the 48-pin SSOP package to minimize high-speed switching noise, and its flow-through pinout-inputs on one side, outputs on the opposite-optimizes PCB trace routing and reduces crosstalk in dense memory or address bus layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - compatible with standard 5 V TTL/CMOS logic rails; no level-shifting required. |
| Output Drive | ±24 mA - sufficient to directly drive multiple TTL loads or terminate short stubs on parallel buses. |
| Propagation Delay | 4 ns min / 9.4 ns max (A→Y, VCC = 5 V) - enables reliable operation in sub-100 MHz synchronous bus environments. |
| 3-State Enable/Disable Time | tPZH/tPLZ = 3–5.4 ns; tPHZ/tPLZ = 5–10.3 ns - fast bus turnaround supports high-throughput burst transfers. |
| Input Compatibility | TTL-voltage thresholds (VIH = 2 V, VIL = 0.8 V) - interoperable with legacy 74LS, 74F, and microcontroller GPIO without interface logic. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded control, instrumentation, and communications equipment. |
| Power Dissipation | 1.2 W max (DL package, TA = 55°C) - thermal design accommodates continuous operation in compact enclosures with natural convection. |
Pinout & Package
74ACT16244DL is housed in a 48-pin Shrink Small-Outline Package (SSOP-DL), 12.6 mm × 6.2 mm × 1.95 mm body, with 0.5 mm lead pitch and gull-wing leads. Pin 1 is marked by a notch or dot in Quadrant Q1 of the tape reel.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE, 3OE, 4OE | Active-low output-enable inputs (per 4-bit group) | Independent control of Y1–Y4 outputs per section; enables partial bus gating without full device disable. |
| 1A1–1A4, 2A1–2A4, 3A1–3A4, 4A1–4A4 | Buffer input terminals (16 total) | Flow-through layout places all A inputs on top/bottom edges for direct connection to address/data lines. |
| 1Y1–1Y4, 2Y1–2Y4, 3Y1–3Y4, 4Y1–4Y4 | True (non-inverting) 3-state outputs (16 total) | Outputs placed opposite corresponding A pins to minimize crossing traces; supports point-to-point or multidrop bus loading. |
| VCC (Pins 7, 18, 31, 42) | Power supply connections | Distributed VCC pins reduce simultaneous switching noise and improve PDN impedance across high-frequency operation. |
| GND (Pins 4, 10, 15, 21, 28, 34, 39, 45) | Ground return connections | Eight GND pins interspersed with VCC and I/O provide low-inductance return paths and suppress ground bounce. |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through architecture | Input and output pins arranged on opposing sides of package - eliminates layer jumps and vias in PCB routing for memory/address buses. |
| Distributed VCC/GND pinning | Four VCC and eight GND pins strategically placed - lowers power delivery impedance and suppresses simultaneous switching noise up to 100 MHz. |
| TTL-input compatibility | VIH = 2 V, VIL = 0.8 V - ensures direct interfacing with legacy 74LS, microcontrollers, and FPGA I/O banks without external biasing. |
| EPIC™ CMOS process | 1-μm implanted CMOS - delivers 500 mA latch-up immunity at 125°C and stable AC performance across industrial temperature range. |
| 3-state output symmetry | Matched tPZH/tPLZ and tPHZ/tPLZ delays (<1 ns skew between enable/disable paths) - prevents bus contention during state transitions. |
Applications
| Memory Address Buffering | System Bus Transceiver Interface |
|---|---|
|
Use Scenario: Driving 16-bit address lines from a microcontroller to SRAM or Flash memory in an industrial PLC backplane. IC Role / Device Role / Timing Role: Non-inverting 3-state buffer providing fanout, noise isolation, and bus arbitration via OE-controlled tri-state. Use Value: Flow-through pinout allows straight-line routing; ±24 mA drive ensures signal integrity across 10 cm PCB traces at 25 MHz. |
Use Scenario: Isolating and buffering bidirectional data bus segments between CPU and peripheral ASIC in a medical imaging subsystem. IC Role / Device Role / Timing Role: Four independent 4-bit buffers used in parallel to manage direction-controlled data lanes with minimal skew. Use Value: Matched enable/disable timing (tPZH/tPHZ ≤ 10.3 ns) prevents bus contention during read/write handshaking cycles. |
| High-Density Clock Distribution | Legacy TTL System Upgrade |
|
Use Scenario: Distributing a 40 MHz system clock to multiple synchronous logic blocks (e.g., FIFOs, counters) on a test equipment mainboard. IC Role / Device Role / Timing Role: Low-skew, non-inverting buffer replicating clock signal with deterministic delay (tPLH/tPHL = 4–9.4 ns). Use Value: Distributed power/ground pins suppress jitter induced by simultaneous clock edge transitions across 16 outputs. |
Use Scenario: Replacing obsolete 74F244 in a legacy industrial controller requiring drop-in compatibility and extended temperature support. IC Role / Device Role / Timing Role: Pin- and function-compatible upgrade delivering improved noise margin, lower ICC, and guaranteed 85°C operation. Use Value: TTL-compatible inputs and identical logic diagram allow board-level replacement without schematic or layout changes. |
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 |
|---|---|---|---|
| 74ACT16244DGGR | TSSOP-48 package (DGG); 1.2 mm max height vs. DL's 1.95 mm; same electrical specs and pinout. | Better suited for ultra-thin designs and automated SMT assembly with tighter footprint tolerance. | Select DGGR for new designs prioritizing board space and reflow compatibility; DL remains viable for legacy SSOP footprints. |
| SN74ABT16244DGGR | ABT family: higher drive (±64 mA), faster speed (tPD = 3.6 ns), but higher ICC and no TTL input compatibility. | Required when driving long traces, heavy capacitive loads (>50 pF), or high-speed buses >66 MHz. | Choose ABT only if drive strength or speed exceeds ACT requirements; otherwise, ACT offers superior noise immunity and lower power. |
Compared with 74ACT16244DGGR and SN74ABT16244DGGR, the 74ACT16244DL provides identical logic functionality and pinout in a taller but thermally robust SSOP package, making it optimal for industrial applications where mechanical clearance and thermal mass outweigh ultra-low profile needs.
Availability
74ACT16244DL is available at Aetrix Electronics and suitable for industrial control systems, legacy system upgrades, and high-reliability memory interface designs requiring stable component supply over extended product lifecycles.
Supply support for 74ACT16244DL 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 industry-standard logic families.
The 74ACT16244DL belongs to TI's Widebus™ family of high-density bus-interface ICs, engineered specifically to enhance performance and layout efficiency in memory addressing, clock distribution, and bus-oriented systems.
FAQ
What is the operating temperature range for the 74ACT16244DL?
The 74ACT16244DL is characterized for operation from –40°C to +85°C, meeting industrial-grade environmental requirements. This range is explicitly specified in the SCAS116B datasheet and validated across all electrical parameters including propagation delay, output drive, and 3-state leakage. The 74ACT16244DL does not support extended military-range operation like the SN54ACT16244 variant.
Is the 74ACT16244DL pin-compatible with other 74ACT16244 variants?
Yes, the 74ACT16244DL shares identical pinout and logic function with the 74ACT16244DGGR (TSSOP) and 74ACT16244DGG (obsolete TSSOP), as confirmed by TI's package drawings and logic diagrams. All variants use the same 48-pin functional mapping, including OE, A, Y, VCC, and GND positions - enabling direct PCB footprint reuse where package height allows.
Does the 74ACT16244DL support TTL-level input signals?
Yes, the 74ACT16244DL features TTL-voltage-compatible inputs with VIH = 2.0 V (min) and VIL = 0.8 V (max) at VCC = 4.5–5.5 V, as verified in the "Recommended Operating Conditions" table of SCAS116B. This allows direct connection to 74LS, 74F, and microcontroller GPIO without pull-up resistors or level shifters.
What is the maximum output current capability of the 74ACT16244DL?
The 74ACT16244DL delivers ±24 mA per output at VOH ≥ 3.94 V and VOL ≤ 0.44 V (VCC = 4.5 V, TA = 25°C), per the "Electrical Characteristics" table. Absolute maximum ratings permit ±50 mA short-term, but sustained operation above ±24 mA risks exceeding VOL/VOH limits and thermal limits in the DL package.
How does the flow-through architecture of the 74ACT16244DL benefit PCB layout?
The 74ACT16244DL arranges all 16 inputs (A1–A16) on one half of the 48-pin SSOP and all 16 outputs (Y1–Y16) on the opposite half, enabling straight-line, via-free routing between memory controllers and DRAM/SRAM devices. This reduces trace length mismatch, crosstalk, and layer count - directly improving signal integrity in high-speed address and data buses.
74ACT16244DL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ACT
- Package/Case:
- 48-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Bulk
- Product Status:
- Obsolete
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 4
- Number of Bits per Element:
- 4
- 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
74ACT16244DL FAQ
1.How can I place an order for 74ACT16244DL through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ACT16244DL 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 74ACT16244DL reliable?
The price and inventory of 74ACT16244DL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ACT16244DL is usually 5 days.
3.What payment methods are accepted for 74ACT16244DL?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ACT16244DL transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ACT16244DL?
74ACT16244DL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ACT16244DL 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 74ACT16244DL?
For technical support, including 74ACT16244DL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ACT16244DL requirements.
6.How does Aetrix verify that 74ACT16244DL is sourced from the original manufacturer or authorized distributors?
All 74ACT16244DL 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 74ACT16244DL meets industry standards.
7.What is the process for return or replacement of 74ACT16244DL?
All 74ACT16244DL units undergo pre-shipment inspection (PSI). If there is an issue with 74ACT16244DL, 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 74ACT16244DL part is unused and in its original packaging.
Return procedure for 74ACT16244DL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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