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Texas Instruments 74ACT16244DLR
- Part No.:
- 74ACT16244DLR
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
74ACT16244DLR.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,893
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Product details
Overview
74ACT16244DLR from Texas Instruments is a 16-bit non-inverting buffer/line driver with 3-state outputs, designed for memory address driving, bus interfacing, and clock distribution in industrial digital systems. It operates at 4.5 V to 5.5 V, delivers ±24 mA output drive, supports –40°C to 85°C operation, and features flow-through pinout for optimized PCB layout.
For engineers reviewing the 74ACT16244DLR datasheet, 74ACT16244DLR pinout, 74ACT16244DLR application, or 74ACT16244DLR equivalent, key selection criteria include TTL-compatible inputs, symmetrical active-low OE control per 4-bit group, 3.4 ns minimum propagation delay (tPHL), 50 pF power dissipation capacitance when enabled, and SSOP-48 package compatibility with high-density routing constraints.
Technical Context
This device implements four independent 4-bit buffer sections, each with dedicated active-low output-enable (OE) inputs-1OE through 4OE-enabling granular bus control. Each section drives true (non-inverted) outputs with rail-to-rail swing and 3-state capability, eliminating bus contention during idle cycles.
Based on TI's EPIC™ 1-μm CMOS process, it integrates distributed VCC/GND pins to suppress switching noise, supports latch-up immunity of 500 mA at 125°C, and maintains stable timing across temperature via guaranteed tPLH/tPHL ≤ 9.4 ns and tPZH/tPZL ≤ 10.3 ns at 5 V and 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures compatibility with standard 5-V TTL and CMOS logic rails without level-shifting. |
| Output Drive | ±24 mA - Sufficient to directly drive 50-pF loads at full speed without external buffering. |
| Propagation Delay | tPHL ≤ 9.5 ns - Enables reliable operation in 100-MHz address/data bus timing windows. |
| 3-State Enable Time | tPZH ≤ 11.3 ns - Guarantees fast bus release for time-critical multiplexed architectures. |
| Input Compatibility | TTL-voltage - Accepts standard 0.8 V / 2.0 V input thresholds, simplifying interface with legacy controllers. |
| Power Dissipation Cap. | Cd = 39 pF - Predictable dynamic power consumption for thermal modeling in dense layouts. |
| Operating Temperature | –40°C to +85°C - Qualified for industrial-grade embedded systems without derating. |
Pinout & Package
74ACT16244DLR uses a 48-pin Shrink Small-Outline Package (SSOP-DL), 11.35 mm × 16.2 mm body, 0.5-mm lead pitch, and Q1 pin-1 quadrant orientation. The package supports automated placement and reflow per JEDEC Level-1-260°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE, 3OE, 4OE | Active-low output-enable inputs | Independently disable each 4-bit buffer group; tied low to enable, high to tri-state outputs. |
| 1A1–1A4, 2A1–2A4, etc. | Buffer input terminals (16 total) | True-input logic signals routed to corresponding Y outputs; TTL-compatible voltage thresholds. |
| 1Y1–1Y4, 2Y1–2Y4, etc. | Buffer output terminals (16 total) | Non-inverted, 3-state outputs; high-impedance when respective OE is high. |
| VCC (Pins 7, 18, 28, 39) | Power supply connections | Distributed VCC pins minimize IR drop and reduce simultaneous switching noise across the die. |
| GND (Pins 4, 10, 21, 32, 45) | Ground return paths | Five GND pins provide low-inductance return paths for all output groups and internal logic. |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through architecture | Input and output pins aligned on opposite sides (e.g., A1–A4 on left, Y1–Y4 on right), enabling straight PCB traces and reduced crosstalk. |
| Distributed VCC/GND | Four VCC and five GND pins placed strategically across the 48-pin array to stabilize supply rails during high-speed switching. |
| EPIC™ process technology | 1-μm CMOS fabrication ensures low static current (ICC ≤ 160 μA), high noise immunity, and robust latch-up resistance (500 mA @ 125°C). |
| TTL-compatible inputs | VIH = 2.0 V min, VIL = 0.8 V max - Interoperates directly with 74LS, 74F, and microcontroller GPIO without external biasing. |
| 3-state output symmetry | Identical tPZH/tPLZ and tPHZ/tPLZ specs across all 16 outputs - Ensures deterministic bus arbitration timing. |
Applications
| Memory Address Buffering | Industrial Bus Transceiver Interface |
|---|---|
Use Scenario: Driving 16-bit address lines from a microcontroller to multiple SRAM or Flash devices sharing a common data bus. IC Role / Device Role / Timing Role: Non-inverting 3-state buffer isolating CPU address outputs from memory load; OE controlled by chip-select decoding. Use Value: Prevents address bus contention during memory access arbitration; enables clean signal integrity up to 100 MHz due to <9.5 ns tPHL. |
Use Scenario: Bidirectional data buffering between an FPGA and legacy parallel peripheral (e.g., printer port or ISA-style I/O card). IC Role / Device Role / Timing Role: Direction-controlled line driver/receiver using paired 74ACT16244DLR units; OE synchronized with direction signal. Use Value: Eliminates need for discrete transceivers; leverages symmetrical enable timing (tPZH/tPLZ ≤ 10.3 ns) for glitch-free bus turnaround. |
| Clock Distribution Network | High-Density PCB Signal Fanout |
Use Scenario: Distributing a single system clock to multiple synchronous logic blocks (e.g., ADC, DAC, and FPGA peripherals) requiring matched skew. IC Role / Device Role / Timing Role: Low-skew, non-inverting fanout buffer; all 16 outputs driven from one clock source with shared OE. Use Value: Achieves inter-output skew <0.5 ns due to matched internal paths and distributed power delivery, critical for setup/hold compliance. |
Use Scenario: Expanding limited MCU GPIO count to drive 16 discrete indicators, relays, or sensor inputs in space-constrained industrial HMI panels. IC Role / Device Role / Timing Role: General-purpose logic-level translator and drive amplifier; inputs tied to MCU port, outputs routed to external loads. Use Value: Delivers ±24 mA per output - sufficient to drive LEDs directly or interface with 5-V optocouplers without external drivers. |
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 (24.4 mm × 13.0 mm); 0.5-mm pitch; thinner profile (1.2 mm max height). | Better suited for ultra-thin or portable designs where board height is constrained; same electrical specs and pinout. | Select DGGR for space-limited assemblies requiring lower profile; DL and DGG are functionally identical but mechanically distinct. |
| SN74ABT16244DGG | ABT family: higher drive (±64 mA), faster propagation (tPHL ≤ 4.5 ns), but higher ICC (up to 30 mA typical). | Required for driving heavier capacitive loads (>100 pF) or sub-5-ns timing-critical buses; not drop-in due to increased power demand. | Choose ABT version only when 74ACT16244DLR's ±24 mA or 9.5 ns delay is insufficient; verify thermal margin and supply stability. |
Compared with 74ACT16244DGGR, the 74ACT16244DLR offers identical logic behavior and timing but in a wider SSOP body better suited for manual inspection and rework; versus SN74ABT16244DGG, it trades speed and drive strength for lower power and broader voltage noise margin, making it optimal for general-purpose industrial buffering where thermal headroom and cost matter.
Availability
74ACT16244DLR is available at Aetrix Electronics and suitable for industrial control systems, memory subsystems, and programmable logic interfaces requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for 74ACT16244DLR 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 founded in 1930, delivering analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
The 74ACT16244DLR belongs to TI's Widebus™ family of high-speed CMOS logic, engineered specifically to increase density and performance of memory address drivers, clock trees, and bus-oriented receivers/transmitters in industrial digital systems.
FAQ
What is the maximum operating temperature range for the 74ACT16244DLR?
The 74ACT16244DLR is characterized for operation from –40°C to +85°C. This industrial temperature rating ensures reliable functionality in factory automation, motor control, and outdoor equipment environments without thermal derating. Its EPIC™ process and distributed power/ground pins maintain timing stability across this full range.
Does the 74ACT16244DLR support true 3-state outputs with simultaneous enable control?
Yes, the 74ACT16244DLR provides true 3-state outputs with four independent active-low OE inputs (1OE–4OE), allowing selective disabling of each 4-bit buffer group. When an OE is high, its associated Y outputs enter high-impedance state with leakage ≤ ±10 μA - verified per datasheet IOZ spec at 5.5 V.
Can the 74ACT16244DLR be used with 3.3-V logic systems?
No - the 74ACT16244DLR requires a 4.5 V to 5.5 V supply and is not 3.3-V tolerant. Its inputs meet TTL thresholds (VIL = 0.8 V, VIH = 2.0 V), but applying 3.3-V signals risks violating VOH/VOL specs and may cause unreliable switching. For mixed-voltage systems, use level translators or 3.3-V-compatible alternatives like SN74LVC16244A.
How does the flow-through pinout of the 74ACT16244DLR improve PCB layout?
The flow-through architecture places inputs (e.g., 1A1–1A4) and corresponding outputs (1Y1–1Y4) on opposite sides of the SSOP-48 package, enabling direct horizontal routing without vias or layer changes. This reduces trace length, crosstalk, and EMI - especially valuable in high-speed memory address or clock distribution layouts.
Is the 74ACT16244DLR pin-compatible with other members of the ACT16244 family?
Yes - the 74ACT16244DLR shares identical pinout and logic function with 74ACT16244DGGR (TSSOP) and SN54ACT16244WD (ceramic flatpack). All variants use the same 48-pin assignment, including VCC/GND distribution and OE/A/Y mapping, enabling mechanical interchangeability within footprint-constrained designs.
74ACT16244DLR 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:
- 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
74ACT16244DLR FAQ
1.How can I place an order for 74ACT16244DLR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ACT16244DLR 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 74ACT16244DLR reliable?
The price and inventory of 74ACT16244DLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ACT16244DLR is usually 5 days.
3.What payment methods are accepted for 74ACT16244DLR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ACT16244DLR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ACT16244DLR?
74ACT16244DLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ACT16244DLR 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 74ACT16244DLR?
For technical support, including 74ACT16244DLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ACT16244DLR requirements.
6.How does Aetrix verify that 74ACT16244DLR is sourced from the original manufacturer or authorized distributors?
All 74ACT16244DLR 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 74ACT16244DLR meets industry standards.
7.What is the process for return or replacement of 74ACT16244DLR?
All 74ACT16244DLR units undergo pre-shipment inspection (PSI). If there is an issue with 74ACT16244DLR, 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 74ACT16244DLR part is unused and in its original packaging.
Return procedure for 74ACT16244DLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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