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Texas Instruments SN74ALVTH16240GR
- Part No.:
- SN74ALVTH16240GR
- Manufacturer:
- Texas Instruments
- Package:
- 48-TFSOP (0.240", 6.10mm Width)
- Datasheet:
-
SN74ALVTH16240GR.pdf
- Description:
- IC BUFFER INVERT 3.6V 48TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,016
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Product details
Overview
SN74ALVTH16240GR from Texas Instruments is a 16-bit inverting buffer/driver with 3-state outputs, designed for 2.5-V/3.3-V operation and TTL-level 5-V system interfacing. It delivers ±24 mA/±32 mA drive at 2.5 V/3.3 V, supports bus-hold on all data inputs, and features auto-3-state detection for output disable when VO > VCC + 0.5 V. It is used in memory address buffering, clock distribution, and bus transceivers in industrial embedded systems.
For engineers reviewing the SN74ALVTH16240GR datasheet, SN74ALVTH16240GR pinout, SN74ALVTH16240GR application, or SN74ALVTH16240GR equivalent, key selection criteria include its mixed-mode 5-V input tolerance, high-impedance state during power-up/down, distributed VCC/GND pin layout for noise reduction, and TSSOP-48 package compatibility with high-density PCB routing.
Technical Context
This device implements four independent 4-bit inverting buffers, each with active-low OE control (1OE–4OE), enabling flexible partitioning as 4×4-bit, 2×8-bit, or 1×16-bit configurations. Its Advanced BiCMOS Technology (ABT) architecture ensures low static power dissipation while maintaining high-speed switching performance.
The logic supports live insertion via power-off output disable and prevents bus contention through guaranteed high-impedance states below 1.5 V VCC. Bus-hold circuitry eliminates external pullup/pulldown resistors by sustaining valid logic levels on floating inputs with ±75 µA hold current at 3.3 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.3 V to 3.6 V - Enables dual-voltage system interoperability and robust operation across supply tolerances. |
| Output Drive | –32 mA / +64 mA at 3.3 V - Sustains signal integrity driving heavy capacitive loads or multiple TTL inputs without external buffers. |
| Propagation Delay | 1 ns to 3.3 ns (CL = 50 pF, VCC = 3.3 V) - Supports high-speed bus timing in DDR memory controllers and FPGA I/O interfaces. |
| Input Voltage Range | –0.5 V to 5.5 V - Allows direct connection to 5-V logic without level shifters, simplifying mixed-voltage board design. |
| Bus-Hold Current | ±75 µA at VI = 0.8 V / 2.0 V - Maintains stable logic states on unterminated data lines, reducing BOM count and layout complexity. |
| Power-Up Behavior | High-impedance state when VCC ≤ 1.2 V - Prevents output conflicts during power sequencing in multi-rail systems. |
| ESD Rating | 2000 V HBM, 1000 V CDM - Meets industrial-grade reliability requirements for assembly and field operation. |
Pinout & Package
TSSOP-48 (DGG) package with 0.5-mm pitch, 12.6 mm × 6.2 mm body, and 1.2 mm max height. Features distributed VCC/GND pins to minimize simultaneous switching noise and flow-through pin arrangement for simplified PCB trace routing.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE–4OE | Active-low output enable | Independent control per 4-bit section; enables partial bus isolation without full device disable. |
| 1A1–4A4 | Data inputs | All inputs include bus-hold circuitry; no external termination required for floating conditions. |
| 1Y1–4Y4 | Inverting buffered outputs | 3-state capable; outputs enter high-Z when OE = high or VCC < 1.5 V. |
| VCC (Pins 7, 15, 28, 40) | Supply voltage | Distributed power pins reduce IR drop and improve high-frequency noise immunity. |
| GND (Pins 4, 10, 18, 25, 32, 39) | Ground reference | Six ground pins provide low-inductance return paths for fast-switching outputs. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode signal operation | 5-V-tolerant inputs/outputs with 2.3–3.6 V VCC - Eliminates level translators in legacy-to-modern interface designs. |
| Auto-3-state detection | Outputs disable automatically when VO exceeds VCC + 0.5 V - Prevents back-driving and latch-up during hot-swap or fault conditions. |
| Flow-through architecture | Input and output pins arranged on opposite sides of package - Reduces layer count and crosstalk in dense routing environments. |
| Low ground bounce | VOLP < 0.8 V at VCC = 3.3 V - Ensures clean logic thresholds under heavy switching loads. |
| Live insertion support | Outputs disabled when VCC = 0 V - Enables safe replacement in powered-backplane systems without disrupting bus operation. |
Applications
| Memory Address Buffering | Clock Distribution Network |
|---|---|
Use Scenario: Driving address lines from an FPGA or microcontroller to multiple SRAM or Flash devices on a shared bus. IC Role / Device Role / Timing Role: Inverting 16-bit buffer with 3-state control, isolating address propagation during chip-select transitions. Use Value: High drive strength (±32 mA/±64 mA) maintains signal edge integrity across long traces and fan-out loads up to 10 TTL units. | Use Scenario: Distributing a single system clock to multiple synchronous peripherals with matched trace lengths. IC Role / Device Role / Timing Role: Low-skew, inverting buffer stage ensuring monotonic clock edges and deterministic enable/disable timing. Use Value: Propagation delay variation < 0.2 ns between channels minimizes clock skew across 16 outputs. |
| Industrial Backplane Interface | FPGA I/O Expansion |
Use Scenario: Interfacing a 3.3-V FPGA to legacy 5-V peripheral cards in programmable logic controllers. IC Role / Device Role / Timing Role: Level-shifting buffer with 5-V-tolerant inputs and 3.3-V-compatible outputs, managed via independent OE controls. Use Value: Eliminates discrete level translators; bus-hold sustains valid states during card insertion/removal. | Use Scenario: Expanding GPIO count from a resource-constrained FPGA to drive LEDs, sensors, or actuators. IC Role / Device Role / Timing Role: Configurable 4×4-bit driver enabling dynamic partitioning of I/O groups with individual 3-state control. Use Value: Auto-3-state prevents output contention when external devices drive same bus lines during reconfiguration. |
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 | Non-inverting, lower drive (±24 mA), no bus-hold, 1.65–3.6 V VCC | Requires external pullups for floating inputs; unsuitable for live-insertion due to no power-off disable | Select when non-inverting logic and cost sensitivity outweigh bus-hold and hot-swap needs. |
| SN74ALVCH16244ZR | Inverting, same ABT process, but lacks auto-3-state and has higher ICC (5.5 mA vs 5.0 mA at 3.3 V) | No VO > VCC+0.5 V detection; requires explicit OE control during overvoltage events | Choose when strict auto-3-state is unnecessary and legacy footprint compatibility is critical. |
Compared with SN74LVC16244ADGGR and SN74ALVCH16244ZR, the SN74ALVTH16240GR uniquely combines 5-V-tolerant inputs, bus-hold, auto-3-state, and power-off disable-making it the only option supporting unassisted live insertion and mixed-voltage bus stabilization without external components.
Availability
SN74ALVTH16240GR is available at Aetrix Electronics and suitable for memory subsystems, clock tree distribution, industrial backplanes, FPGA I/O expansion, and embedded controller bus interfaces requiring stable component supply across extended temperature ranges.
Supply support for SN74ALVTH16240GR 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 for industrial, automotive, and communications markets.
The ALVTH family was engineered for high-speed, low-noise 3-state buffering in mixed-voltage digital systems-targeting memory, clock, and bus interface applications where signal integrity, power sequencing safety, and layout efficiency are critical.
FAQ
What is the operating temperature range for the SN74ALVTH16240GR?
The SN74ALVTH16240GR is characterized for operation from –40°C to +85°C. This industrial temperature range ensures reliable performance in embedded controllers, programmable logic systems, and factory automation equipment where ambient thermal conditions vary significantly. The device maintains specified drive strength, propagation delay, and bus-hold functionality across this full range.
Does the SN74ALVTH16240GR support live insertion in powered backplanes?
Yes, the SN74ALVTH16240GR supports live insertion: its outputs enter a high-impedance state when VCC = 0 V, preventing bus contention during card replacement. This behavior, combined with auto-3-state detection (disabling outputs when VO > VCC + 0.5 V), makes the SN74ALVTH16240GR suitable for hot-pluggable modular systems without requiring external isolation circuitry.
How does bus-hold functionality work on the SN74ALVTH16240GR inputs?
The SN74ALVTH16240GR integrates bus-hold circuitry on all data inputs (1A1–4A4), providing ±75 µA sustaining current at 3.3 V to maintain valid logic levels on floating or unterminated lines. This eliminates the need for external pullup/pulldown resistors, reducing BOM cost and PCB area-particularly valuable in high-pin-count memory and address bus applications where many lines may be unused.
What is the maximum output current capability of the SN74ALVTH16240GR at 3.3 V?
At VCC = 3.3 V, the SN74ALVTH16240GR delivers –32 mA (high-level sink) and +64 mA (low-level source) output current per channel under recommended operating conditions. This high drive strength allows direct interfacing with multiple TTL loads or long PCB traces without signal degradation, making the SN74ALVTH16240GR ideal for driving memory address buses and clock distribution networks.
Is the SN74ALVTH16240GR pin-compatible with other 16-bit ALVTH buffers?
No-the SN74ALVTH16240GR uses a unique 48-pin TSSOP (DGG) pinout optimized for flow-through routing and distributed power/ground. While functionally similar to SN74ALVTH16224GR (non-inverting) and SN74ALVTH16373GR (latch), it is not pin-compatible due to differing OE placement, input/output grouping, and power pin distribution. Always verify pin mapping using the official TI datasheet before board layout.
SN74ALVTH16240GR 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, 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
SN74ALVTH16240GR FAQ
1.How can I place an order for SN74ALVTH16240GR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ALVTH16240GR 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 SN74ALVTH16240GR reliable?
The price and inventory of SN74ALVTH16240GR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALVTH16240GR is usually 5 days.
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Once your SN74ALVTH16240GR 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 SN74ALVTH16240GR?
For technical support, including SN74ALVTH16240GR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALVTH16240GR requirements.
6.How does Aetrix verify that SN74ALVTH16240GR is sourced from the original manufacturer or authorized distributors?
All SN74ALVTH16240GR 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 SN74ALVTH16240GR meets industry standards.
7.What is the process for return or replacement of SN74ALVTH16240GR?
All SN74ALVTH16240GR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALVTH16240GR, 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 SN74ALVTH16240GR part is unused and in its original packaging.
Return procedure for SN74ALVTH16240GR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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