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Texas Instruments SN74ABT16244ADLG4
- Part No.:
- SN74ABT16244ADLG4
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74ABT16244ADLG4.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,472
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Product details
Overview
SN74ABT16244ADLG4 from Texas Instruments is a 16-bit noninverting buffer/driver with 3-state outputs in a 48-pin SSOP (DL) package, featuring –32-mA high-drive IOH and 64-mA IOL, 5-V supply operation, and –40°C to 85°C temperature range - used for memory address buffering, clock distribution, and bus interface isolation in industrial control backplanes.
For engineers reviewing the SN74ABT16244ADLG4 datasheet, SN74ABT16244ADLG4 pinout, SN74ABT16244ADLG4 application, or SN74ABT16244ADLG4 equivalent, key selection criteria include output drive strength, 3-state enable timing (tPZH/tPLZ), distributed VCC/GND pin layout for noise suppression, and compatibility with 5-V TTL/CMOS logic systems.
Technical Context
This device implements four independent 4-bit noninverting buffers, each with active-low 3-state output-enable (OE) control. Its EPIC-IIB™ BiCMOS architecture enables high-speed switching while minimizing power dissipation and ground bounce (VOLP <1 V at 5 V).
The flow-through pinout and distributed VCC/GND configuration reduce simultaneous switching noise; each buffer group has dedicated OE inputs (1OE–4OE), and all outputs are symmetrical with true (noninverted) logic polarity.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures robust operation across standard 5-V rail tolerances in industrial bus systems |
| Output Drive | –32 mA IOH / 64 mA IOL - supports heavy capacitive loads and fanout to multiple TTL inputs without signal degradation |
| Propagation Delay | 1 ns to 3.5 ns (tPLH/tPHL @ 5 V, 25°C) - enables reliable timing in ≤100-MHz address/data paths |
| 3-State Enable Time | tPZH = 1–4.8 ns, tPLZ = 1–4.1 ns - guarantees fast bus release for time-critical multiplexed architectures |
| Input Thresholds | VIL = 0.8 V, VIH = 2.0 V - compatible with standard 5-V TTL input levels and noise margins |
| Operating Temperature | –40°C to +85°C - qualified for extended-temperature industrial embedded applications |
| Package | SSOP-48 (DL) - 300-mil body width, surface-mount compatible with standard reflow profiles (MSL Level-1) |
Pinout & Package
SN74ABT16244ADLG4 uses a 48-pin Shrink Small-Outline Package (SSOP, DL) with 0.5-mm lead pitch, 12.4 mm × 5.3 mm body, and gull-wing leads. Pin 1 is marked by a beveled corner; the package features alternating VCC/GND pairs per quadrant to suppress high-speed switching noise.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE–4OE | Active-low output-enable inputs | Independent control per 4-bit group; must be pulled high via resistor during power-up to ensure high-impedance state |
| 1A1–4A4 | Buffer input terminals (16 total) | True logic inputs accepting TTL/CMOS levels; unused inputs must be tied to VCC or GND |
| 1Y1–4Y4 | Buffer output terminals (16 total) | 3-state outputs with high-drive capability; output impedance >10 kΩ when disabled |
| VCC (Pins 7, 24, 31, 48) | Power supply connections | Distributed VCC pins minimize IR drop and improve transient response across wide bus traces |
| GND (Pins 4, 10, 15, 22, 27, 34, 41, 45) | Ground return connections | Eight GND pins provide low-inductance return paths and reduce ground bounce in multi-bit switching |
Key Features
| Feature | Design Value |
|---|---|
| High-Drive Outputs | –32 mA IOH / 64 mA IOL enables direct driving of 10+ TTL loads or long PCB traces without external buffers |
| Distributed Power/Ground | Four VCC and eight GND pins placed across the perimeter reduce simultaneous switching noise by >30% vs. single-rail packages |
| Flow-Through Architecture | Input-to-output pin alignment (e.g., 1A1→1Y1 adjacent) simplifies layer routing and minimizes trace skew in dense layouts |
| Low Ground Bounce | VOLP <1 V at 5 V ensures stable logic thresholds during multi-bit transitions, critical for error-free bus arbitration |
| Widebus™ Compatibility | Fully interoperable with TI's 16-bit Widebus family (e.g., SN74ABT16245) for seamless system-level scalability |
Applications
| Memory Address Buffering | Industrial Backplane Interface |
|---|---|
Use Scenario: Driving 16-bit address lines from a microcontroller to multiple SRAM/Flash devices on a shared bus. IC Role / Device Role / Timing Role: Noninverting buffer isolating MCU address outputs from bus capacitance; 3-state control synchronizes with chip-select signals. Use Value: Prevents address glitches during bus contention and supports fanout to ≥8 memory devices with <1-ns skew between bits. | Use Scenario: Interfacing PLC CPU modules to I/O expansion racks over a 16-bit parallel backplane. IC Role / Device Role / Timing Role: Bidirectional bus driver (with companion transceiver) providing level-shifted, noise-immune data transfer between isolated subsystems. Use Value: High-current outputs maintain signal integrity across 30-cm backplane traces; distributed GND pins suppress EMI in electrically noisy factory environments. |
| Clock Distribution Network | Legacy Peripheral Interface |
Use Scenario: Fanout of a 25-MHz system clock to multiple FPGA configuration ICs and ADC/DAC peripherals. IC Role / Device Role / Timing Role: Low-skew clock buffer with matched propagation delay across all 16 outputs; OE controlled by reset circuitry. Use Value: Ensures <50-ps inter-channel skew and <1-V ground bounce, meeting setup/hold requirements for synchronous sampling at 100 MSPS. | Use Scenario: Connecting an ARM9 host processor to legacy ISA-style peripherals (e.g., UARTs, GPIO expanders) requiring 5-V tolerant signaling. IC Role / Device Role / Timing Role: Voltage-level translator and bus isolator; 3-state outputs prevent conflicts during peripheral hot-swap sequences. Use Value: Eliminates need for discrete level-shifting resistors; enables safe insertion/removal of add-on cards without system reboot. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 16-bit buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT16244ADGGR | TSSOP-48 (DGG) package; identical electrical specs and pinout; 24.4-mm reel width vs. DL's 14.24-mm tube | Better suited for automated SMT assembly with tape-and-reel; same thermal resistance (θJA = 89°C/W) | Select SN74ABT16244ADGGR for high-volume pick-and-place production; SN74ABT16244ADLG4 remains optimal for prototyping or low-volume tube-based builds. |
| SN74LVC16244ADGGR | 3.3-V only operation (1.65–3.6 V); lower drive (–24 mA/24 mA); CMOS input thresholds (VIH = 2.0 V @ 3.3 V) | Designed for mixed-voltage 3.3-V systems; not interoperable with 5-V buses without level translation | Choose SN74LVC16244ADGGR only in pure 3.3-V domains; SN74ABT16244ADLG4 is mandatory for legacy 5-V industrial interfaces. |
Compared with SN74ABT16244ADGGR, SN74ABT16244ADLG4 offers identical logic behavior but differs in packaging form factor and supply chain format (tube vs. tape-and-reel), while SN74LVC16244ADGGR requires full voltage-domain redesign due to incompatible supply and threshold specifications.
Availability
SN74ABT16244ADLG4 is available at Aetrix Electronics and suitable for industrial control backplanes, memory subsystems, and legacy peripheral interfaces requiring stable component supply across extended temperature ranges and long product lifecycles.
Supply support for SN74ABT16244ADLG4 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 over 50 years of innovation in high-reliability interface and bus technologies.
The SN74ABT16244ADLG4 belongs to TI's Widebus™ family of high-speed 3-state buffers, engineered specifically for noise-resilient, high-density memory addressing, clock distribution, and bus-oriented receiver/transmitter applications in industrial and communications infrastructure.
FAQ
What is the recommended power-up sequence for SN74ABT16244ADLG4 to avoid bus contention?
TI specifies that OE inputs must be held high (via pullup resistor to VCC) during power-up and power-down to guarantee outputs remain in high-impedance state. For SN74ABT16244ADLG4, use a ≤10-kΩ pullup on each OE line; minimum resistor value is determined by the driver's current-sinking capability. This prevents unintended output activation before system logic stabilizes.
Does SN74ABT16244ADLG4 support hot-swap applications?
SN74ABT16244ADLG4 includes Ioff protection (±100 µA max at VCC = 0 V), allowing safe insertion into live backplanes. When VCC is unpowered, all I/Os present high impedance regardless of input voltage (≤5.5 V), preventing current backfeed. However, OE must still be externally controlled to avoid metastable states during partial power conditions.
What is the maximum capacitive load SN74ABT16244ADLG4 can drive while maintaining specified timing?
TI characterizes SN74ABT16244ADLG4 switching parameters at CL = 50 pF. While it can drive higher loads (e.g., 100 pF), propagation delays increase nonlinearly - tPLH rises ~1.8× at 100 pF. For designs exceeding 50 pF, verify timing margins using the device's ∆t/∆v = 10 ns/V input transition rate spec and actual trace capacitance.
How does the distributed VCC/GND pin layout in SN74ABT16244ADLG4 reduce noise compared to conventional packages?
SN74ABT16244ADLG4 places four VCC and eight GND pins across its perimeter, creating localized low-inductance power loops. This reduces ground bounce (VOLP <1 V) and supply droop during simultaneous 16-bit switching - measured at least 30% lower than equivalent single-VCC packages - directly improving signal integrity in high-speed bus applications.
Can SN74ABT16244ADLG4 be used as a level shifter between 3.3-V and 5-V logic domains?
No - SN74ABT16244ADLG4 is a 5-V-only device (VCC = 4.5–5.5 V). Its inputs tolerate up to 5.5 V, but outputs swing rail-to-rail at 5 V and lack 3.3-V-compatible thresholds. For bidirectional 3.3-V/5-V translation, use purpose-built level shifters like TXB0108; SN74ABT16244ADLG4 is strictly for 5-V bus buffering.
SN74ABT16244ADLG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 48-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Tube
- 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:
- 32mA, 64mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-SSOP
SN74ABT16244ADLG4 FAQ
1.How can I place an order for SN74ABT16244ADLG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT16244ADLG4 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
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The price and inventory of SN74ABT16244ADLG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT16244ADLG4 is usually 5 days.
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5.How can I obtain technical support or documentation for SN74ABT16244ADLG4?
For technical support, including SN74ABT16244ADLG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT16244ADLG4 requirements.
6.How does Aetrix verify that SN74ABT16244ADLG4 is sourced from the original manufacturer or authorized distributors?
All SN74ABT16244ADLG4 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 SN74ABT16244ADLG4 meets industry standards.
7.What is the process for return or replacement of SN74ABT16244ADLG4?
All SN74ABT16244ADLG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT16244ADLG4, 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 SN74ABT16244ADLG4 part is unused and in its original packaging.
Return procedure for SN74ABT16244ADLG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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