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Texas Instruments SN74LVTH2952DGVR
- Part No.:
- SN74LVTH2952DGVR
- Manufacturer:
- Texas Instruments
- Package:
- 24-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVTH2952DGVR.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 24TVSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,352
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Product details
Overview
SN74LVTH2952DGVR from Texas Instruments is an octal bus transceiver and register IC designed for bidirectional 3.3-V VCC operation with 5-V tolerant inputs/outputs. It features dual 8-bit back-to-back registers, bus-hold on all data inputs, Ioff and power-up 3-state for hot insertion, and supports mixed-mode signal interfacing between 3.3-V and 5-V systems in industrial control backplanes and memory expansion interfaces.
For engineers reviewing the SN74LVTH2952DGVR datasheet, SN74LVTH2952DGVR pinout, SN74LVTH2952DGVR application, or SN74LVTH2952DGVR equivalent, key selection criteria include its 24-pin TVSOP package, 150-MHz clock frequency support, ±500-µA bus-hold current capability, and guaranteed operation down to 2.7 V - critical for battery-powered or voltage-margin-sensitive designs.
Technical Context
The SN74LVTH2952DGVR implements two independent 8-bit bidirectional data paths (A↔B) controlled by separate clock-enable (CLKENAB/CLKENBA), clock (CLKAB/CLKBA), and output-enable (OEAB/OEBA) signals. Each direction uses edge-triggered latching on the low-to-high CLK transition when its corresponding CLKEN is low.
Its bus-hold circuitry actively maintains valid logic levels on floating A/B inputs without external resistors, while Ioff protection disables outputs during power-down to prevent backflow current. The device enters high-impedance state when VCC is below 1.5 V and supports hot insertion via power-up 3-state behavior.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7 V to 3.6 V - enables stable operation across unregulated battery rails and low-noise 3.3-V supplies. |
| Input Voltage Tolerance | Up to 5.5 V - allows direct connection to legacy 5-V TTL buses without level-shifting components. |
| Max Clock Frequency | 150 MHz - supports high-speed data transfer in memory-mapped peripheral interfaces and FPGA interconnects. |
| Bus-Hold Current | ±500 µA at VCC = 3.6 V - eliminates need for external pullup/pulldown resistors on unused data lines. |
| IOL / IOH | 64 mA / −32 mA - drives standard TTL loads directly, reducing buffer count in dense board layouts. |
| Propagation Delay | tPLH/tPHL ≤ 4.6 ns (VCC = 3.3 V, CL = 50 pF) - ensures timing margin compliance in sub-5-ns critical paths. |
| Thermal Resistance θJA | 86°C/W (DGV package) - informs thermal design for continuous operation in enclosed industrial enclosures. |
Pinout & Package
SN74LVTH2952DGVR is housed in a 24-pin Thin Very Small Outline Package (TVSOP), measuring 4.4 mm × 5.0 mm × 1.2 mm max height, with 0.65-mm lead pitch and exposed metal pad for thermal enhancement per JEDEC MO-153.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | A1–A8 Data Inputs/Outputs | Bidirectional A-side bus interface; driven or read depending on OEAB/CLKAB state. |
| 9 | OEAB | Active-low output enable for A→B direction; controls tristate of A1–A8 outputs. |
| 10 | CLKAB | Low-to-high edge-triggered clock for latching data from A to B registers. |
| 11 | CLKENAB | Active-low clock enable for A→B path; must be low for CLKAB to affect register state. |
| 12 | GND | Power ground reference for all internal logic and I/O structures. |
| 13 | VCC | 3.3-V supply input; powers core logic, bus-hold, and output drivers. |
| 14, 15, 16, 17, 18, 19, 20, 21 | B1–B8 Data Inputs/Outputs | Bidirectional B-side bus interface; driven or read depending on OEBA/CLKBA state. |
| 22 | OEBA | Active-low output enable for B→A direction; controls tristate of B1–B8 outputs. |
| 23 | CLKBA | Low-to-high edge-triggered clock for latching data from B to A registers. |
| 24 | CLKENBA | Active-low clock enable for B→A path; must be low for CLKBA to affect register state. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode voltage tolerance | 5-V input/output compatibility with 3.3-V VCC enables seamless integration into hybrid-voltage systems without level shifters. |
| Bus-hold circuitry | Eliminates external pullup/pulldown resistors on A/B data lines, reducing BOM count and PCB footprint. |
| Ioff and power-up 3-state | Prevents damaging current backflow during hot insertion and ensures outputs remain high-Z during power sequencing. |
| Output ground bounce (VOLP) | <0.8 V at VCC = 3.3 V - minimizes noise coupling into adjacent signal nets and power rails. |
| Latch-up immunity | >500 mA per JESD 17 - ensures robustness against transient overcurrent events in noisy industrial environments. |
Applications
| Industrial Backplane Interface | Memory Expansion Subsystem |
|---|---|
|
Use Scenario: Interfacing a 3.3-V microcontroller to legacy 5-V peripheral cards in programmable logic controllers (PLCs). IC Role / Device Role / Timing Role: Bidirectional bus transceiver with clocked register staging, enabling synchronous data exchange between mismatched voltage domains. Use Value: Eliminates discrete level shifters and reduces timing uncertainty via edge-triggered latching aligned to system clock domain. |
Use Scenario: Adding external SRAM or Flash to a 3.3-V FPGA-based embedded vision processor with 5-V-compatible address/data bus. IC Role / Device Role / Timing Role: Octal registered transceiver providing buffered, synchronized data flow between FPGA I/O banks and memory bus. Use Value: Supports 150-MHz clocking and 64-mA drive strength to meet setup/hold timing margins for fast parallel memory access. |
| Hot-Swappable Module Carrier | Battery-Powered Data Logger |
|
Use Scenario: Enabling live insertion/removal of sensor modules in a modular test equipment chassis with shared 3.3-V backplane. IC Role / Device Role / Timing Role: Hot-insertion–qualified transceiver managing bidirectional configuration and telemetry data between host controller and module. Use Value: Ioff and power-up 3-state prevent bus contention and backfeed during partial power-up, ensuring system stability. |
Use Scenario: Connecting a 3.3-V MCU to 5-V analog front-end ICs in a portable environmental monitoring device powered by Li-ion cells. IC Role / Device Role / Timing Role: Voltage-tolerant bus interface maintaining signal integrity as battery voltage drops from 4.2 V to 2.7 V. Use Value: Guaranteed operation down to 2.7 V VCC and 5.5-V input tolerance allow direct interfacing without regulators or translators across full battery range. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVT245DBR | Non-latched, non-registering transceiver; no clock or clock-enable inputs; simpler control interface. | Suitable for asynchronous bus bridging but lacks register staging for synchronous timing-critical transfers. | Select when deterministic latency and clock-domain isolation are not required; lower gate count and cost. |
| SN74AVC8T245RGYR | Lower VCC range (1.2 V to 3.6 V); higher speed (380-MHz max); no bus-hold; requires external biasing. | Better suited for ultra-low-voltage mobile SoC interconnects; incompatible with 5-V input tolerance requirement. | Choose only if system operates below 2.7 V or demands >150-MHz throughput; verify 5-V input compatibility is unnecessary. |
Compared with SN74LVT245DBR and SN74AVC8T245RGYR, the SN74LVTH2952DGVR uniquely combines clocked register functionality, 5-V input tolerance, integrated bus-hold, and hot-insertion support - making it the only option among the three for synchronous, mixed-voltage, plug-in-capable industrial backplane designs.
Availability
SN74LVTH2952DGVR is available at Aetrix Electronics and suitable for industrial automation backplanes, FPGA memory expansion subsystems, hot-swappable test equipment carriers, and battery-powered data loggers requiring stable component supply across extended temperature and voltage ranges.
Supply support for SN74LVTH2952DGVR 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 decades of experience in industrial-grade logic and interface solutions.
The SN74LVTH2952DGVR belongs to TI's LVTH logic family, engineered for robust mixed-signal interfacing in harsh environments - specifically targeting voltage-level translation, bus isolation, and hot-plug reliability in industrial and instrumentation systems.
FAQ
What is the maximum operating temperature range for SN74LVTH2952DGVR?
The SN74LVTH2952DGVR is rated for operation from −40°C to +85°C, matching the commercial/industrial temperature grade specified in its ordering information. This range is validated under recommended operating conditions including VCC = 2.7 V to 3.6 V and load capacitance ≤50 pF, and applies specifically to the DGV (TVSOP) package variant.
Does SN74LVTH2952DGVR support true bidirectional data flow without external direction control?
Yes - the SN74LVTH2952DGVR supports independent bidirectional data flow via two dedicated control sets: CLKAB/CLKENAB/OEAB govern A→B transfer, while CLKBA/CLKENBA/OEBA govern B→A transfer. No external direction line is needed; each path operates autonomously based on its own clock and enable signals.
Can SN74LVTH2952DGVR be used with a 2.5-V supply?
No - the SN74LVTH2952DGVR has a minimum recommended VCC of 2.7 V per its datasheet. Operation below 2.7 V is outside the specified operating conditions and may result in undefined logic behavior, reduced noise margin, or failure to meet timing parameters such as tPLH or setup/hold times.
Is bus-hold functionality enabled by default on SN74LVTH2952DGVR?
Yes - bus-hold circuitry is permanently active on all A1–A8 and B1–B8 inputs of the SN74LVTH2952DGVR and requires no configuration. It holds floating inputs at their last-valid logic state using ±500 µA dynamic current (at VCC = 3.6 V), eliminating the need for external pullup or pulldown resistors.
What is the meaning of "Ioff" in the context of SN74LVTH2952DGVR?
Ioff refers to the off-state output leakage current of the SN74LVTH2952DGVR, specified as ±100 µA when VCC = 0 V and any input or output is biased between 0 V and 4.5 V. This feature prevents damaging current backflow from live buses into a powered-down device - a critical requirement for hot-insertion applications.
SN74LVTH2952DGVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVTH
- Package/Case:
- 24-TFSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- Transceiver, Non-Inverting
- Number of Elements:
- 1
- Number of Bits per Element:
- 8
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 32mA, 64mA
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-TVSOP
SN74LVTH2952DGVR FAQ
1.How can I place an order for SN74LVTH2952DGVR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVTH2952DGVR 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 SN74LVTH2952DGVR reliable?
The price and inventory of SN74LVTH2952DGVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVTH2952DGVR is usually 5 days.
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4.How is shipping managed for SN74LVTH2952DGVR?
SN74LVTH2952DGVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVTH2952DGVR 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 SN74LVTH2952DGVR?
For technical support, including SN74LVTH2952DGVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVTH2952DGVR requirements.
6.How does Aetrix verify that SN74LVTH2952DGVR is sourced from the original manufacturer or authorized distributors?
All SN74LVTH2952DGVR 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 SN74LVTH2952DGVR meets industry standards.
7.What is the process for return or replacement of SN74LVTH2952DGVR?
All SN74LVTH2952DGVR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVTH2952DGVR, 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 SN74LVTH2952DGVR part is unused and in its original packaging.
Return procedure for SN74LVTH2952DGVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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