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Texas Instruments SN74ABTH16244DL
- Part No.:
- SN74ABTH16244DL
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74ABTH16244DL.pdf
- Description:
- IC BUFF NON-INVERT 5.5V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:364
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Product details
Overview
SN74ABTH16244DL from Texas Instruments is a 16-bit noninverting 3-state buffer/driver IC in 48-pin SSOP (DL) package, featuring ±32-mA high-drive outputs, bus-hold on all data inputs, and operation from –40°C to 85°C. It supports memory address buffering, clock distribution, and bus-transceiver applications with symmetrical active-low OE control and flow-through pinout.
For engineers reviewing the SN74ABTH16244DL datasheet, SN74ABTH16244DL pinout, SN74ABTH16244DL application, or SN74ABTH16244DL equivalent, key selection criteria include 3-state drive strength (–32 mA/64 mA), bus-hold functionality eliminating external resistors, thermal resistance (θJA = 63°C/W), and compatibility with 5-V TTL-level systems requiring high-noise-immunity bus interfacing.
Technical Context
This device implements four independent 4-bit noninverting buffers, each with dedicated active-low output-enable (OE) control and true (noninverting) logic path. Its EPIC-IIB BiCMOS architecture delivers low power dissipation while maintaining TTL-compatible input thresholds (VIL = 0.8 V, VVIH = 2 V) and rail-to-rail output swing under load.
Distributed VCC/GND pins and flow-through pin mapping minimize switching noise and optimize PCB layout for high-speed bus applications. Latch-up immunity exceeds 500 mA per JESD 17, and output ground bounce (VOLP) remains below 1 V at VCC = 5 V and TA = 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - Ensures robust operation across industrial 5-V rail tolerances without level-shifting. |
| Output Drive | –32 mA IOH, 64 mA IOL - Drives heavy capacitive loads and multiple TTL inputs directly. |
| Propagation Delay | 0.7–3.6 ns (tPLH/tPHL) - Supports >200 MHz bus toggle rates with CL = 50 pF. |
| Bus-Hold Current | ±40 µA hold current at VI = 2 V/0.8 V - Maintains valid logic state on floating inputs without external biasing. |
| Thermal Resistance | θJA = 63°C/W (DL package) - Enables sustained 16-bit switching at ambient up to 85°C with standard PCB copper. |
| ESD Protection | >2000 V HBM, >200 V MM - Survives handling and board-level electrostatic events without protection diodes. |
| Operating Temperature | –40°C to +85°C - Qualified for industrial-grade embedded and computing infrastructure environments. |
Pinout & Package
SN74ABTH16244DL uses a 48-pin Shrink Small-Outline Package (SSOP-DL) with 0.5-mm pitch, 12.4 mm × 6.0 mm body, and 1.2-mm max height. Pin 1 identifier located at top-left corner with notch marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE, 3OE, 4OE | Active-low output-enable inputs | Independently disable each 4-bit buffer section; tie to VCC via pullup for power-up high-Z safety. |
| 1A1–1A4, 2A1–2A4, 3A1–3A4, 4A1–4A4 | Data inputs | All inputs feature bus-hold circuitry; no external pullups/pulldowns required for unused lines. |
| 1Y1–1Y4, 2Y1–2Y4, 3Y1–3Y4, 4Y1–4Y4 | True (noninverting) buffered outputs | High-drive 3-state outputs capable of sinking 64 mA or sourcing 32 mA into TTL loads. |
| VCC (Pins 7, 18, 31, 42) | Power supply | Distributed VCC pins reduce simultaneous switching noise and improve power integrity. |
| GND (Pins 4, 10, 15, 21, 28, 34, 39, 45) | Ground reference | Eight GND pins provide low-inductance return paths and minimize ground bounce during fast transitions. |
Key Features
| Feature | Design Value |
|---|---|
| Flow-through architecture | Input and output pins arranged on opposite sides of package to eliminate layer jumps and reduce trace length in dense bus layouts. |
| Bus-hold circuitry | Eliminates need for 10-kΩ external pullup/pulldown resistors on all 16 data inputs, reducing BOM count and board space. |
| Distributed power/ground | Four VCC and eight GND pins suppress simultaneous switching noise and maintain signal integrity at >100-MHz edge rates. |
| High-drive 3-state outputs | –32 mA source / 64 mA sink capability drives 20+ TTL loads or long traces without external buffers. |
| Latch-up immunity | Exceeds 500 mA per JESD 17 - prevents destructive latch-up during transient overvoltage or hot-insertion events. |
Applications
| Memory Address Buffering | Backplane Clock Distribution |
|---|---|
|
Use Scenario: Driving 16-bit address buses between microcontroller and SRAM/Flash in industrial controllers. IC Role / Device Role / Timing Role: Noninverting 3-state buffer isolating CPU address lines from memory module loading and enabling multi-drop bus sharing. Use Value: Bus-hold maintains valid address state during reset or standby; high-drive ensures setup/hold timing margins with 50-pF trace capacitance. |
Use Scenario: Distributing synchronized clock signals across multiple FPGA or ASIC clock domains on a backplane. IC Role / Device Role / Timing Role: Low-skew, high-fanout clock driver with independent OE control per quadrant for dynamic domain gating. Use Value: Flow-through pinout minimizes skew between channels; distributed VCC/GND reduces jitter induced by simultaneous edge transitions. |
| PCI/ISA Bus Transceiver Interface | Industrial I/O Expansion Module |
|
Use Scenario: Level-shifting and buffering between legacy ISA bus peripherals and modern host controllers. IC Role / Device Role / Timing Role: Bidirectional 3-state interface translating TTL logic levels and driving bus capacitance up to 100 pF. Use Value: Symmetrical tPZH/tPLZ (0.7–4.9 ns) ensures deterministic bus release timing; latch-up immunity withstands bus contention faults. |
Use Scenario: Isolating programmable logic controller (PLC) CPU from noisy field I/O modules via opto-isolated backplane. IC Role / Device Role / Timing Role: Data conditioning buffer between isolated serial interface and local parallel I/O register bank. Use Value: –40°C to +85°C rating supports extended temperature operation; bus-hold prevents floating inputs during hot-swap insertion. |
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 |
|---|---|---|---|
| SN74ABT16244DL | Omits bus-hold circuitry; otherwise identical pinout, drive strength, and timing. | Requires external pullup/pulldown resistors on all inputs if left unconnected. | Select when bus-hold is unnecessary and BOM cost reduction is prioritized. |
| SN74LVTH16244DL | Lower voltage operation (2.7–3.6 V); reduced drive (–24 mA/48 mA); higher propagation delay (typ. 4.2 ns). | Not compatible with 5-V TTL systems; suited for mixed-voltage 3.3-V bus interfaces. | Choose only for 3.3-V domains where power efficiency outweighs speed and drive requirements. |
Compared with SN74ABTH16244DL, SN74ABT16244DL removes bus-hold to cut cost but increases external component count, while SN74LVTH16244DL shifts to 3.3-V operation with lower performance-neither offers drop-in replacement capability in 5-V industrial bus designs.
Availability
SN74ABTH16244DL is available at Aetrix Electronics and suitable for memory subsystems, backplane clock trees, industrial I/O expansion, and legacy bus interface designs requiring stable component supply across extended product lifecycles.
Supply support for SN74ABTH16244DL 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 delivering analog, embedded processing, and logic solutions with emphasis on reliability, longevity, and industrial-grade qualification.
The SN74ABTH16244DL belongs to TI's Widebus™ family of high-speed bus-interface logic, engineered specifically for noise-resilient, high-density memory addressing, clock distribution, and bus-oriented transceiver applications in industrial and computing infrastructure.
FAQ
What is the maximum operating temperature range for the SN74ABTH16244DL?
The SN74ABTH16244DL is characterized for operation from –40°C to +85°C, meeting industrial temperature requirements. This range is confirmed in the "recommended operating conditions" table of the SCBS677D datasheet and applies specifically to the DL-package variant. The SN54ABTH16244 military version operates from –55°C to 125°C, but that specification does not extend to the SN74ABTH16244DL.
Does the SN74ABTH16244DL require external pullup resistors on its input pins?
No, the SN74ABTH16244DL includes integrated bus-hold circuitry on all 16 data inputs (A1–A16), which actively maintains a valid logic state when inputs float. This eliminates the need for external pullup or pulldown resistors, reducing BOM count and PCB area. The bus-hold current is specified as ±40 µA at VI = 2 V or 0.8 V.
What is the thermal resistance θJA of the SN74ABTH16244DL package?
The SN74ABTH16244DL in the SSOP (DL) package has a junction-to-ambient thermal resistance (θJA) of 63°C/W, as stated in the "absolute maximum ratings" table of the SCBS677D datasheet. This value assumes standard JEDEC test board conditions and enables thermal design for continuous 16-bit switching at full drive strength within the –40°C to +85°C ambient range.
Can the SN74ABTH16244DL be used as a 16-bit, 8-bit, or 4-bit buffer?
Yes, the SN74ABTH16244DL is architecturally flexible: it contains four independent 4-bit noninverting buffers, each with its own active-low OE input (1OE–4OE). Users may configure it as one 16-bit buffer (all OEs tied), two 8-bit buffers (1OE+2OE and 3OE+4OE grouped), or four separate 4-bit buffers - all with true outputs and identical electrical characteristics.
How does the SN74ABTH16244DL handle power-up and power-down states?
To ensure high-impedance outputs during power-up or power-down, the OE inputs of the SN74ABTH16244DL must be tied to VCC through a pullup resistor. The minimum resistor value depends on the current-sinking capability of the driving source, as specified in the functional description. This prevents bus contention before system initialization completes.
SN74ABTH16244DL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABTH
- Package/Case:
- 48-BSSOP (0.295", 7.50mm Width)
- Packaging:
- Bulk
- 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:
- 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
SN74ABTH16244DL FAQ
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Please submit a Request for Quotation (RFQ) for SN74ABTH16244DL 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 SN74ABTH16244DL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABTH16244DL is usually 5 days.
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Once your SN74ABTH16244DL 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 SN74ABTH16244DL?
For technical support, including SN74ABTH16244DL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABTH16244DL requirements.
6.How does Aetrix verify that SN74ABTH16244DL is sourced from the original manufacturer or authorized distributors?
All SN74ABTH16244DL 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 SN74ABTH16244DL meets industry standards.
7.What is the process for return or replacement of SN74ABTH16244DL?
All SN74ABTH16244DL units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABTH16244DL, 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 SN74ABTH16244DL part is unused and in its original packaging.
Return procedure for SN74ABTH16244DL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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