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Texas Instruments SN74ALVTH16244DL
- Part No.:
- SN74ALVTH16244DL
- Manufacturer:
- Texas Instruments
- Package:
- 48-BSSOP (0.295", 7.50mm Width)
- Datasheet:
-
SN74ALVTH16244DL.pdf
- Description:
- IC BUFFER NON-INVERT 3.6V 48SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,871
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Product details
Overview
SN74ALVTH16244DL from Texas Instruments is a 16-bit noninverting buffer/driver with 3-state outputs, designed for 2.5-V/3.3-V VCC operation and 5-V I/O tolerance. It delivers ±32 mA high-drive capability, supports mixed-mode signal interfacing (5-V inputs/outputs with 3.3-V supply), and integrates bus-hold circuitry to eliminate external pull resistors. Used in backplane data routing and level-shifting between 3.3-V logic and legacy 5-V systems.
For engineers reviewing the SN74ALVTH16244DL datasheet, SN74ALVTH16244DL pinout, SN74ALVTH16244DL application, or SN74ALVTH16244DL equivalent, key selection considerations include its 48-pin SSOP (DL) package, auto-3-state behavior, Ioff-enabled hot insertion support, and guaranteed operation down to 2.3-V unregulated battery supply.
Technical Context
This device implements four independent 4-bit buffer sections, each with dedicated output-enable (OE) control. Its Advanced BiCMOS Technology (ABT) architecture enables low static power dissipation while maintaining TTL-compatible thresholds at 3.3-V VCC and supporting 5-V input voltage tolerance without level shifters.
The integrated bus-hold circuit maintains valid logic states on floating inputs, and the auto-3-state feature forces outputs into high-impedance when VO exceeds VCC - critical for preventing bus contention during hot-swap events. Ioff protection disables outputs during power-down to block reverse current flow.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3 V to 3.6 V - supports unregulated battery operation and dual-voltage system integration |
| Output Drive | –32 mA / +64 mA - drives heavy capacitive loads and interfaces directly with 5-V TTL inputs |
| Input Voltage Tolerance | 0 V to 5.5 V - enables direct connection to 5-V buses without external level translation |
| Propagation Delay | 1 ns to 2.4 ns (CL = 50 pF, VCC = 3.3 V) - ensures timing-critical data path integrity in high-speed digital systems |
| Bus-Hold Current | ±75 µA at VI = 0.8 V / 2.0 V - actively sustains logic state on unterminated data lines |
| Ioff Leakage | ±100 µA at VCC = 0 V - prevents damaging backflow during hot insertion or partial power-down |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded and communications equipment |
Pinout & Package
SN74ALVTH16244DL uses a 48-pin Shrink Small-Outline Package (SSOP, DL), 300-mil body width, 0.5-mm lead pitch, JEDEC MO-153 compliant. Package dimensions: 12.6 mm × 7.9 mm × 1.2 mm max height.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE, 3OE, 4OE | Section Output Enable (active-low) | Independent control of four 4-bit buffer groups; asserted low enables outputs |
| 1A1–1A4, 2A1–2A4, etc. | Data Inputs | 16 buffered inputs with integrated bus-hold; no external pull resistors required |
| 1Y1–1Y4, 2Y1–2Y4, etc. | Buffered Outputs | 16 3-state outputs with ±32 mA drive; auto-3-state activates if VO > VCC |
| VCC (Pins 7, 18, 31, 42) | Power Supply | Four distributed VCC pins reduce switching noise and improve PSRR across widebus layout |
| GND (Pins 4, 10, 15, 23, 27, 34, 39, 45) | Ground Reference | Eight GND pins provide low-inductance return paths for high-speed switching currents |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode I/O compatibility | Operates at 3.3-V VCC while accepting and driving 5-V signals - eliminates discrete level shifters in hybrid voltage systems |
| Auto-3-state output logic | Outputs automatically enter high-impedance when output voltage exceeds VCC - prevents bus contention during voltage transients or hot-swap |
| Integrated bus-hold circuitry | Holds floating inputs at valid logic levels using ±75 µA dynamic current - removes need for 10-kΩ external pullup/pulldown resistors |
| Ioff and power-up 3-state | Blocks reverse current flow during power-down and forces outputs to high-Z during power ramp - enables safe hot insertion in modular backplanes |
| Low ground bounce (VOLP) | Typical <0.8 V at VCC = 3.3 V - reduces noise coupling into adjacent signal lines and improves signal integrity |
Applications
| Backplane Data Routing | Legacy System Interface |
|---|---|
Use Scenario: Isolating and buffering address/data lines between 3.3-V processor modules and 5-V peripheral slots in modular telecom chassis. IC Role / Device Role / Timing Role: Noninverting buffer with 3-state control per 4-bit group, enabling time-multiplexed bus sharing and isolation during module insertion/removal. Use Value: Auto-3-state and Ioff prevent bus conflicts and backfeed during hot-swap; 5-V tolerant inputs accept legacy peripheral signaling without translation. | Use Scenario: Interfacing a modern 3.3-V FPGA I/O bank to legacy 5-V industrial controllers via parallel bus. IC Role / Device Role / Timing Role: Level-translating buffer with bus-hold, ensuring stable logic levels on unterminated control lines during FPGA configuration or reset. Use Value: Eliminates external pull resistors and discrete translators; ±32 mA drive ensures robust signal integrity over long PCB traces. |
| Unregulated Power Systems | Hot-Swappable Module Control |
Use Scenario: Driving LEDs, relays, and status indicators from a battery-powered portable instrument with decaying 2.5–3.6-V supply rail. IC Role / Device Role / Timing Role: High-drive buffer sustaining logic compatibility and output swing as VCC drops below nominal 3.3 V. Use Value: Guaranteed operation down to 2.3 V allows extended runtime before shutdown; VOL remains ≤0.55 V even at 64 mA sink. | Use Scenario: Enabling/disabling communication lines between a main controller and field-replaceable I/O modules in railway signaling hardware. IC Role / Device Role / Timing Role: Sectionally enabled buffer providing controlled signal gating and fault isolation during module insertion. Use Value: Independent OE pins per 4-bit section allow granular enable sequencing; power-up 3-state avoids glitch propagation during power ramp. |
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 |
|---|---|---|---|
| SN74LVC16244ADGGR | Lower drive (±24 mA), no auto-3-state, no bus-hold, 1.65–3.6-V VCC range | Suitable only for clean 3.3-V-only systems without hot-swap or floating inputs | Select when cost and power are prioritized over 5-V tolerance and robustness in noisy or mixed-voltage environments |
| SN74AVC16244DGGR | 1.2–3.6-V VCC, ±12 mA drive, no bus-hold, no auto-3-state, higher speed (tPD <1.5 ns) | Targeted at ultra-low-voltage mobile interfaces; lacks industrial-level robustness features | Choose only for battery-constrained, single-supply 1.8-V/2.5-V designs where 5-V compatibility is irrelevant |
Compared with SN74LVC16244ADGGR and SN74AVC16244DGGR, the SN74ALVTH16244DL uniquely combines 5-V I/O tolerance, auto-3-state, bus-hold, and Ioff - making it the sole option for industrial hot-swap and mixed-voltage backplane applications requiring zero external components for signal integrity.
Availability
SN74ALVTH16244DL is available at Aetrix Electronics and suitable for backplane data routing, legacy system interface, unregulated power systems, and hot-swappable module control requiring stable component supply across industrial temperature ranges and long-lifecycle programs.
Supply support for SN74ALVTH16244DL 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 connectivity technologies with over 50 years of innovation in industrial, automotive, and communications markets.
The SN74ALVTH16244DL belongs to TI's Widebus™ family of advanced bus-interface devices, engineered specifically for robust, mixed-voltage board-level interconnect in mission-critical industrial and telecom infrastructure.
FAQ
What is the operating voltage range for the SN74ALVTH16244DL?
The SN74ALVTH16244DL operates over a VCC range of 2.3 V to 3.6 V, supporting both 2.5-V and 3.3-V nominal supplies. This range enables reliable function under unregulated battery conditions and accommodates supply tolerances in industrial power rails. The device maintains full 5-V input/output voltage tolerance across this entire VCC window, allowing seamless integration into mixed-voltage systems without external level-shifting circuitry.
Does the SN74ALVTH16244DL support hot insertion?
Yes, the SN74ALVTH16244DL supports hot insertion through two complementary features: Ioff circuitry disables outputs when VCC = 0 V to prevent reverse current flow, and power-up 3-state forces outputs into high-impedance during power ramp. These features are fully characterized and guaranteed per TI's datasheet SCES070G, making SN74ALVTH16244DL suitable for modular backplane and field-replaceable unit applications where live board insertion is required.
How does the auto-3-state function work on the SN74ALVTH16244DL?
The auto-3-state function on the SN74ALVTH16244DL automatically places outputs in high-impedance whenever the output voltage (VO) exceeds VCC - a condition that occurs during bus contention, ESD events, or hot-swap transients. This behavior is intrinsic to the ABT output stage design and requires no external circuitry or configuration. It is distinct from the OE-controlled 3-state and provides an additional layer of bus protection beyond standard enable logic.
What package type is used for the SN74ALVTH16244DL?
The SN74ALVTH16244DL uses a 48-pin Shrink Small-Outline Package (SSOP) with designation DL, measuring 12.6 mm × 7.9 mm × 1.2 mm max height and featuring 0.5-mm lead pitch. This JEDEC MO-153 compliant package offers high pin density with surface-mount reliability and is optimized for automated assembly in industrial PCBs requiring thermal and mechanical robustness.
Does the SN74ALVTH16244DL require external pullup or pulldown resistors on its inputs?
No, the SN74ALVTH16244DL does not require external pullup or pulldown resistors due to its integrated bus-hold circuitry. Each data input actively maintains its last-valid logic state using ±75 µA dynamic current, eliminating floating nodes and ensuring deterministic behavior in unterminated or sparsely loaded buses. This feature is enabled by default and requires no configuration or external components.
SN74ALVTH16244DL Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALVTH
- 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:
- 32mA, 64mA
- Voltage - Supply:
- 2.3V ~ 2.7V, 3V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 48-SSOP
SN74ALVTH16244DL FAQ
1.How can I place an order for SN74ALVTH16244DL through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALVTH16244DL 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 SN74ALVTH16244DL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALVTH16244DL is usually 5 days.
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Once your SN74ALVTH16244DL 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 SN74ALVTH16244DL?
For technical support, including SN74ALVTH16244DL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALVTH16244DL requirements.
6.How does Aetrix verify that SN74ALVTH16244DL is sourced from the original manufacturer or authorized distributors?
All SN74ALVTH16244DL 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 SN74ALVTH16244DL meets industry standards.
7.What is the process for return or replacement of SN74ALVTH16244DL?
All SN74ALVTH16244DL units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALVTH16244DL, 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 SN74ALVTH16244DL part is unused and in its original packaging.
Return procedure for SN74ALVTH16244DL:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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