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Texas Instruments SN74ALVTH16244GR
- Part No.:
- SN74ALVTH16244GR
- Manufacturer:
- Texas Instruments
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
SN74ALVTH16244GR.pdf
- Description:
- IC BUF NON-INVERT 3.6V 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:130
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Product details
Overview
SN74ALVTH16244GR from Texas Instruments is a 2.5-V/3.3-V 16-bit noninverting buffer/driver with 3-state outputs, designed for mixed-voltage system interfacing between 3.3-V logic and 5-V TTL environments. It features bus-hold circuitry on all data inputs, Ioff protection for hot insertion, and supports VCC down to 2.3 V for unregulated battery operation - used in industrial backplane drivers and FPGA I/O expansion.
For engineers reviewing the SN74ALVTH16244GR datasheet, SN74ALVTH16244GR pinout, SN74ALVTH16244GR application, or SN74ALVTH16244GR equivalent, key selection considerations include its 32 mA high-drive capability at 3.3 V, auto-3-state behavior above VCC, and TSSOP-48 (DGG) package compatibility with space-constrained PCB layouts.
Technical Context
This device implements four independent 4-bit buffer sections, each with dedicated output-enable (OE) control and active bus-hold on all A-inputs. Its ABT BiCMOS architecture enables low static power dissipation while maintaining TTL-compatible input thresholds and 5-V tolerant I/O under 3.3-V VCC operation.
The SN74ALVTH16244GR integrates power-up/power-down 3-state logic that forces outputs into high-impedance when VCC ≤ 1.2 V, and supports Ioff current limiting (< ±100 µA) to prevent backflow during hot-swap events. Output ground bounce (VOLP) remains below 0.8 V at 3.3 V and 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3 V to 3.6 V - supports unregulated battery rails and dual-supply system integration |
| IOH/IOL (3.3 V) | –32 mA / 64 mA - drives heavy capacitive loads or multiple TTL inputs without external buffers |
| VIH/VIL (3.3 V) | 2.0 V / 0.8 V - ensures reliable TTL-level signal recognition in mixed-voltage buses |
| tPLH/tPHL (CL = 50 pF) | 1 ns / 2.5 ns - enables sub-5 ns propagation for high-speed address/data buffering |
| Bus-Hold Current | ±75 µA at VI = 2.0 V - maintains valid logic state on floating inputs without external resistors |
| Ioff Limit | ±100 µA at VCC = 0 - prevents damaging current flow during live board insertion |
| Operating Temp | –40°C to +85°C - qualified for industrial temperature range operation |
Pinout & Package
TSSOP-48 (DGG) package: 12.6 mm × 6.2 mm × 1.2 mm body, 0.5 mm pitch, lead-free, RoHS-compliant, moisture sensitivity level (MSL) not specified per TI documentation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE, 3OE, 4OE | Group output-enable control | Active-low enables/disables corresponding 4-bit buffer section; tied to VCC via pullup for safe power-up |
| 1A1–1A4, 2A1–2A4, etc. | Data inputs | 16 total inputs with integrated bus-hold; tolerate 0–5.5 V regardless of VCC |
| 1Y1–1Y4, 2Y1–2Y4, etc. | Buffered outputs | 16 total 3-state outputs; auto-3-state activates when VO > VCC, eliminating bus contention |
| VCC (Pins 7, 18, 25, 34) | Power supply | Four distributed VCC pins reduce IR drop and improve noise immunity across wide bus |
| GND (Pins 4, 10, 15, 21, 27, 32, 37, 43) | Ground reference | Eight GND pins provide low-inductance return paths for high-speed switching currents |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode I/O tolerance | 5-V input/output voltage support with 3.3-V VCC - eliminates level-shifters in legacy interface designs |
| Auto-3-state output logic | Outputs enter high-impedance automatically if output voltage exceeds VCC - prevents bus conflicts during overvoltage transients |
| Integrated bus-hold | Holds unused inputs at valid logic levels - removes need for 10-kΩ external pullups/pulldowns on 16 lines |
| Hot-insertion support | Ioff and power-up 3-state ensure zero-current backflow and conflict-free insertion into live backplanes |
| Low ground bounce | VOLP < 0.8 V at 3.3 V - maintains signal integrity in high-density parallel bus applications |
Applications
| Industrial Backplane Interface | FPGA I/O Expansion |
|---|---|
Use Scenario: Interfacing 3.3-V FPGA I/O banks to legacy 5-V peripheral cards in programmable logic controllers. IC Role / Device Role / Timing Role: Level-translating buffer isolating FPGA core logic from noisy 5-V bus domains while preserving timing margins. Use Value: Eliminates discrete level shifters and reduces BOM count by 16 components per interface channel. |
Use Scenario: Driving high-capacitance traces from FPGA GPIOs to external ADCs, DACs, and memory interfaces. IC Role / Device Role / Timing Role: High-drive buffer ensuring clean signal edges across 10-cm PCB traces with 30–50 pF load. Use Value: Delivers 64 mA sink current to meet setup/hold timing under worst-case trace loading. |
| Hot-Swappable Module Carrier | Embedded Control Bus Isolation |
Use Scenario: Enabling live replacement of sensor modules in modular test equipment without powering down main controller. IC Role / Device Role / Timing Role: Hot-insertion–qualified buffer providing Ioff isolation and power-up 3-state coordination. Use Value: Prevents backfeeding into powered-backplane rails and avoids bus contention during module insertion/removal. |
Use Scenario: Isolating microcontroller GPIOs from noisy motor driver or relay control lines in factory automation systems. IC Role / Device Role / Timing Role: Directional signal conditioner decoupling sensitive MCU pins from EMI-prone actuator circuits. Use Value: Bus-hold maintains defined logic states during MCU reset or brownout, preventing spurious actuation. |
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/24 mA), no bus-hold, LVC CMOS process only - no 5-V tolerance without external clamping | Suitable for pure 3.3-V systems; requires external pullups if inputs float | Choose for cost-sensitive, single-rail 3.3-V designs where bus-hold and 5-V tolerance are unnecessary |
| SN74ALVCH16244GR | Same pinout and function but lacks auto-3-state and has reduced Ioff spec (±10 µA vs ±100 µA) | Not qualified for hot-swap; requires explicit OE control sequencing during power transitions | Choose only if auto-3-state and robust hot-insertion are not required in the target system |
Compared with SN74LVC16244ADGGR and SN74ALVCH16244GR, the SN74ALVTH16244GR uniquely delivers 5-V I/O tolerance, auto-3-state, and ±100 µA Ioff - making it the sole option among the three qualified for mixed-voltage hot-swap backplane applications.
Availability
SN74ALVTH16244GR is available at Aetrix Electronics and suitable for industrial backplane interface, FPGA I/O expansion, hot-swappable module carrier, and embedded control bus isolation requiring stable component supply across extended product lifecycles.
Supply support for SN74ALVTH16244GR 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 company specializing in analog, embedded processing, and connectivity technologies, with leadership in industrial, automotive, and communications markets.
The SN74ALVTH16244GR belongs to TI's Widebus™ family of advanced bus-interface ICs, engineered specifically for high-reliability, mixed-voltage system interconnect in industrial control and programmable logic infrastructure.
FAQ
What is the maximum operating voltage for SN74ALVTH16244GR inputs and outputs?
The SN74ALVTH16244GR supports input and output voltages up to 5.5 V regardless of VCC level, enabling direct connection to 5-V TTL buses while powered from 2.5-V or 3.3-V supplies. This 5-V tolerance is maintained across the full –40°C to +85°C temperature range and does not require external clamping diodes.
Does SN74ALVTH16244GR require external pullup resistors on its data inputs?
No - the SN74ALVTH16244GR includes active bus-hold circuitry on all 16 data inputs, which maintains a valid logic state when inputs are floating or unused. This eliminates the need for external 10-kΩ pullup or pulldown resistors, reducing component count and PCB area in high-pin-count applications.
How does the auto-3-state feature of SN74ALVTH16244GR operate?
The SN74ALVTH16244GR enters high-impedance automatically whenever any output voltage exceeds VCC - a hardware-level safety mechanism that prevents bus contention during overvoltage faults or mismatched supply sequencing. This behavior is independent of OE pin state and requires no firmware or external logic.
What is the thermal performance of SN74ALVTH16244GR in its TSSOP-48 (DGG) package?
The SN74ALVTH16244GR in the DGG package has a junction-to-ambient thermal resistance (θJA) of 89°C/W. At maximum rated output current (64 mA per output, worst-case), junction temperature rise remains within safe limits for continuous operation at ambient temperatures up to 85°C with standard PCB copper pour.
Is SN74ALVTH16244GR suitable for hot-plug applications?
Yes - the SN74ALVTH16244GR is explicitly characterized for hot-insertion use via two mechanisms: Ioff circuitry limits current to ±100 µA when VCC = 0, and power-up 3-state forces outputs into high-impedance during VCC ramp-up (≤200 µs/V), preventing bus conflicts during live module insertion.
SN74ALVTH16244GR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ALVTH
- Package/Case:
- 48-TFSOP (0.240", 6.10mm Width)
- Packaging:
- Tape & Reel (TR)
- 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-TSSOP
SN74ALVTH16244GR FAQ
1.How can I place an order for SN74ALVTH16244GR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALVTH16244GR 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 SN74ALVTH16244GR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALVTH16244GR is usually 5 days.
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Once your SN74ALVTH16244GR order is processed, you will receive an email with the shipment details and tracking number.
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5.How can I obtain technical support or documentation for SN74ALVTH16244GR?
For technical support, including SN74ALVTH16244GR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALVTH16244GR requirements.
6.How does Aetrix verify that SN74ALVTH16244GR is sourced from the original manufacturer or authorized distributors?
All SN74ALVTH16244GR 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 SN74ALVTH16244GR meets industry standards.
7.What is the process for return or replacement of SN74ALVTH16244GR?
All SN74ALVTH16244GR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALVTH16244GR, 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 SN74ALVTH16244GR part is unused and in its original packaging.
Return procedure for SN74ALVTH16244GR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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