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Texas Instruments 74ACT16244DLRG4
- Part No.:
- 74ACT16244DLRG4
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
74ACT16244DLRG4.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,877
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Product details
Overview
74ACT16244DLRG4 from Texas Instruments is a 16-bit non-inverting 3-state buffer/line driver in SSOP-48 package, operating at 4.5–5.5 V, with ±24 mA output drive, 8.5 ns max propagation delay (A→Y), and TTL-compatible inputs. It serves as memory address register buffer or bus transceiver in industrial control backplanes.
For engineers reviewing the 74ACT16244DLRG4 datasheet, 74ACT16244DLRG4 pinout, 74ACT16244DLRG4 application, or 74ACT16244DLRG4 equivalent, key selection criteria include 3-state timing (tPZH/tPHZ), flow-through pinout for PCB routing, distributed VCC/GND for noise suppression, and −40°C to +85°C industrial temperature rating.
Technical Context
This device implements four independent 4-bit buffered drivers, each with active-low OE control and true (non-inverted) outputs. Its EPIC™ CMOS process enables 500-mA latch-up immunity at 125°C and supports high-speed switching with distributed power/ground pins minimizing simultaneous switching noise.
The flow-through architecture places inputs on one side and outputs on the opposite side of the SSOP-48 package, enabling straight PCB trace routing. Input transition rate is specified up to 10 ns/V, and all 48 pins are assigned - including four dedicated OE inputs (1OE–4OE), sixteen A inputs, and sixteen Y outputs - with no shared or multiplexed functions.
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 systems. |
| Output Drive | ±24 mA - sufficient to drive 50-Ω transmission lines or multiple TTL loads without external buffering. |
| Propagation Delay | Max 8.5 ns (A→Y at VCC = 4.5 V) - enables reliable operation in 100+ MHz bus clock domains. |
| 3-State Enable Time | tPZH ≤ 10.3 ns, tPLZ ≤ 10.9 ns - guarantees fast bus release and acquisition for time-critical arbitration. |
| Input Compatibility | TTL-voltage compatible (VIH = 2 V, VIL = 0.8 V) - allows direct interfacing with legacy 74LS/TTL logic without level shifters. |
| Operating Temperature | −40°C to +85°C - qualified for industrial-grade embedded systems and programmable logic controllers. |
| Power Dissipation | 1.2 W (max at TA = 55°C, DL package) - requires minimal thermal management on standard FR-4 PCBs. |
Pinout & Package
74ACT16244DLRG4 uses a 48-pin Shrink Small-Outline Package (SSOP-DL) with 0.5-mm lead pitch, 12.6 mm × 6.2 mm body, and 1.2 mm max height. Pin 1 is marked in Q1 quadrant per tape-and-reel specification.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE, 3OE, 4OE | Active-low output-enable inputs | Independently control 4-bit groups (Y1–Y4 per section); low = enabled, high = high-impedance. |
| 1A1–1A4, 2A1–2A4, 3A1–3A4, 4A1–4A4 | Buffer input terminals | 16 total non-inverting data inputs, grouped into four 4-bit sections aligned with OE signals. |
| 1Y1–1Y4, 2Y1–2Y4, 3Y1–3Y4, 4Y1–4Y4 | Buffer output terminals | 16 true (non-inverted) 3-state outputs; each mirrors its corresponding A input when OE is low. |
| VCC (pins 7, 18, 28, 39) | Power supply connections | Distributed across package to reduce IR drop and high-frequency impedance in dense bus layouts. |
| GND (pins 4, 10, 15, 21, 25, 31, 36, 42) | Ground connections | Eight GND pins interleaved with VCC and I/O to minimize ground bounce and improve signal integrity. |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through pinout | Inputs on left/right edges, outputs on opposite side - eliminates layer jumps and reduces trace length in bus routing. |
| Distributed VCC/GND | Four VCC and eight GND pins placed strategically - lowers simultaneous switching noise by >6 dB vs. single-supply packages. |
| EPIC™ CMOS process | 1-μm technology with 500-mA latch-up immunity - meets MIL-STD-883 Class B requirements for harsh environments. |
| TTL-input compatibility | VIH = 2 V, VIL = 0.8 V - interoperates directly with 74LS, 74F, and microcontroller GPIO without pull-ups or translators. |
| 3-state output symmetry | tPZH = tPLZ and tPHZ = tPLZ within ±0.5 ns - ensures deterministic bus turnaround timing in bidirectional protocols. |
Applications
| Memory Address Buffering | Industrial Backplane Interface |
|---|---|
Use Scenario: Driving 16-bit address lines from a microcontroller to multiple SRAM or flash devices on a shared bus. IC Role / Device Role / Timing Role: Non-inverting 3-state buffer isolating address generation logic from capacitive bus loading; OE synchronized to memory access strobes. Use Value: Prevents address glitches during bus contention; 8.5 ns delay ensures setup/hold compliance with 10-MHz memory cycles. | Use Scenario: Interfacing PLC CPU modules with I/O expansion cards over a 16-bit parallel backplane. IC Role / Device Role / Timing Role: Bus transceiver providing direction-controlled data isolation between master and slave slots using discrete OE control. Use Value: Enables hot-swap-safe bus arbitration via independent 4-bit OE groups; distributed power pins suppress noise in electrically noisy factory floors. |
| Legacy System Bus Extension | Test Equipment Signal Conditioning |
Use Scenario: Extending a vintage 74LS-based computer bus to add new peripheral cards while maintaining signal integrity. IC Role / Device Role / Timing Role: Level-shifting and fanout buffer converting LS-TTL logic levels to ACT-compatible swing with drive strength upgrade. Use Value: Eliminates need for discrete resistors or additional buffers; TTL-compatible inputs accept 74LS output voltages directly. | Use Scenario: Conditioning digital stimulus signals in automated test equipment before routing to DUT interface connectors. IC Role / Device Role / Timing Role: Output isolation and transient suppression for 16-channel pattern generators using 3-state control for channel blanking. Use Value: High-impedance state prevents signal coupling between test channels; ±24 mA drive ensures clean edges into 50-Ω coaxial loads. |
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 |
|---|---|---|---|
| 74ACT16244DGGRG4 | TSSOP-48 package (DGG), same electrical specs, 1.2 mm height vs. DL's 2.0 mm | Better suited for space-constrained PCBs; slightly higher thermal resistance (0.85 W vs. 1.2 W) | Select DGGRG4 for ultra-thin designs; DL RG4 preferred where board-level mechanical clearance or thermal margin is critical. |
| SN74ABT16244DGGR | ABT family: 4.5–5.5 V, ±64 mA drive, faster tPLH (3.5 ns typ), but higher ICC (30 mA typ) | Higher drive for terminated buses; not TTL-input compatible (VIH = 2.0 V min still holds, but VIH spec tighter) | Choose ABT version only when >24 mA drive or sub-5 ns timing is required; verify input voltage margins with source logic. |
Compared with 74ACT16244DLRG4, the DGGRG4 offers identical functionality in a thinner package but reduced power handling, while the SN74ABT16244DGGR delivers higher speed and drive at the cost of increased quiescent current and stricter input thresholds - making the original ACT variant optimal for balanced industrial bus buffering where noise immunity and thermal headroom are prioritized.
Availability
74ACT16244DLRG4 is available at Aetrix Electronics and suitable for industrial control backplanes, legacy system upgrades, and test equipment signal conditioning requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74ACT16244DLRG4 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 74ACT16244DLRG4 belongs to TI's Widebus™ family of high-density bus interface ICs, engineered specifically to replace discrete TTL buffers in memory addressing, clock distribution, and parallel bus systems while improving noise immunity and layout efficiency.
FAQ
What is the maximum operating temperature range for the 74ACT16244DLRG4?
The 74ACT16244DLRG4 is characterized for operation from −40°C to +85°C, meeting industrial-grade environmental requirements. This range is confirmed in the "Recommended Operating Conditions" table of the SCAS116B datasheet and applies specifically to the DL-package variant. The military-grade SN54ACT16244 (WD package) extends to −55°C to +125°C, but that specification does not apply to the 74ACT16244DLRG4.
Does the 74ACT16244DLRG4 support TTL-level input signals?
Yes, the 74ACT16244DLRG4 features TTL-voltage compatible inputs with VIH = 2.0 V (min) and VIL = 0.8 V (max) at VCC = 4.5 V to 5.5 V. This allows direct connection to 74LS, 74F, and other legacy TTL families without level-shifting circuitry. The specification is explicitly stated in the "Recommended Operating Conditions" section and verified across temperature and voltage corners.
How many independent 3-state control inputs does the 74ACT16244DLRG4 have?
The 74ACT16244DLRG4 has four independent active-low output-enable inputs: 1OE, 2OE, 3OE, and 4OE. Each controls a 4-bit group of outputs (e.g., 1OE enables Y1–Y4 of the first section). This grouping is defined in the function table and logic diagram of the SCAS116B datasheet and physically mapped to pins 1, 48, 25, and 24 respectively in the DL package.
What is the typical propagation delay from input to output for the 74ACT16244DLRG4?
The typical propagation delay (tPLH/tPHL) for the 74ACT16244DLRG4 is 6.5 ns (A→Y) at VCC = 4.5 V and TA = 25°C, with a maximum of 8.5 ns under worst-case conditions. These values are measured per Figure 1 load circuit and appear in the "Switching Characteristics" table for the 74ACT16244 column. Delays are symmetric for rising/falling edges and consistent across all 16 channels.
Is the 74ACT16244DLRG4 pin-compatible with other 74ACT16244 variants like the DGGRG4?
No - the 74ACT16244DLRG4 (SSOP-DL) and 74ACT16244DGGRG4 (TSSOP-DGG) share identical logic functionality and pin numbering, but their physical footprints differ: DL has 0.635-mm lead pitch and 12.6 mm × 6.2 mm body, while DGG uses 0.5-mm pitch and 12.5 mm × 6.1 mm body. PCB layout changes are required; they are not drop-in replacements despite matching pinouts and electrical behavior.
74ACT16244DLRG4 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:
- Discontinued at Digi-Key
- 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
74ACT16244DLRG4 FAQ
1.How can I place an order for 74ACT16244DLRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ACT16244DLRG4 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 74ACT16244DLRG4 reliable?
The price and inventory of 74ACT16244DLRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ACT16244DLRG4 is usually 5 days.
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74ACT16244DLRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ACT16244DLRG4 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 74ACT16244DLRG4?
For technical support, including 74ACT16244DLRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ACT16244DLRG4 requirements.
6.How does Aetrix verify that 74ACT16244DLRG4 is sourced from the original manufacturer or authorized distributors?
All 74ACT16244DLRG4 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 74ACT16244DLRG4 meets industry standards.
7.What is the process for return or replacement of 74ACT16244DLRG4?
All 74ACT16244DLRG4 units undergo pre-shipment inspection (PSI). If there is an issue with 74ACT16244DLRG4, 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 74ACT16244DLRG4 part is unused and in its original packaging.
Return procedure for 74ACT16244DLRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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