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Texas Instruments SN74LVTH2952PWR
- Part No.:
- SN74LVTH2952PWR
- Manufacturer:
- Texas Instruments
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVTH2952PWR.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 24TSSOP
- Quantity:
- Payment:
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Product details
Overview
SN74LVTH2952PWR 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.
For engineers reviewing the SN74LVTH2952PWR datasheet, SN74LVTH2952PWR pinout, SN74LVTH2952PWR application, or SN74LVTH2952PWR equivalent, key selection criteria include its 24-pin TSSOP package, 150-MHz maximum clock frequency, ±64-mA output drive, 2.7–3.6-V supply range, and bus-hold functionality eliminating external pull resistors.
Technical Context
The SN74LVTH2952PWR implements two independent 8-bit register paths (A↔B) controlled by separate clock (CLKAB/CLKBA), clock-enable (CLKENAB/CLKENBA), and output-enable (OEAB/OEBA) signals. Each direction operates synchronously on the low-to-high clock edge when its corresponding clock-enable is low.
It integrates active bus-hold circuitry on all A- and B-port data lines, providing ±75-µA hold current at 3 V to maintain valid logic states without external biasing. Ioff protection disables outputs during power-down, preventing backflow current when VCC = 0 V.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7 V to 3.6 V - Enables stable operation across unregulated battery supplies down to 2.7 V. |
| Input Voltage Tolerance | Up to 5.5 V - Allows direct connection to legacy 5-V TTL buses without level-shifting circuitry. |
| Max Clock Frequency | 150 MHz - Supports high-speed synchronous data transfer between isolated bus domains. |
| IOL / IOH | 64 mA / −32 mA - Drives heavy capacitive loads or multiple TTL inputs without external buffers. |
| Bus-Hold Current | ±75 µA at 3 V - Maintains defined logic state on floating data lines, eliminating need for external pullup/pulldown resistors. |
| Output Ground Bounce | <0.8 V at VCC = 3.3 V - Reduces switching noise coupling into shared ground planes in dense PCB layouts. |
| Power-Up 3-State | Active below 1.5 V VCC - Ensures outputs remain high-impedance during power ramp-up/down, preventing bus contention. |
Pinout & Package
TSSOP-24 (PW) package: 7.8 mm × 4.4 mm body, 0.65-mm lead pitch, 1.2-mm max height, exposed metal pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1–A8 | Port A data input/output | Bidirectional data path toward A bus; latched on CLKAB↑ when CLKENAB = L. |
| B1–B8 | Port B data input/output | Bidirectional data path toward B bus; latched on CLKBA↑ when CLKENBA = L. |
| OEAB | Output enable (A→B) | Low enables A-to-B data flow; high places B-port outputs in high-impedance state. |
| OEBA | Output enable (B→A) | Low enables B-to-A data flow; high places A-port outputs in high-impedance state. |
| CLKAB | Clock (A→B) | Low-to-high transition latches A-port data into B-register when CLKENAB = L. |
| CLKBA | Clock (B→A) | Low-to-high transition latches B-port data into A-register when CLKENBA = L. |
| CLKENAB | Clock enable (A→B) | Low enables CLKAB; high disables A→B register action regardless of CLKAB transitions. |
| CLKENBA | Clock enable (B→A) | Low enables CLKBA; high disables B→A register action regardless of CLKBA transitions. |
| VCC | Supply voltage | 3.3-V core supply; supports operation down to 2.7 V with full specification compliance. |
| GND | Ground reference | Common return path for all internal logic and I/O circuits; decoupling required near pin. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode 3.3-V/5-V interface | Accepts 5-V TTL inputs while operating from 3.3-V VCC - eliminates level translators in mixed-voltage backplane designs. |
| Integrated bus-hold | Active on all 16 data lines - removes requirement for 16 external pull resistors, reducing BOM count and board area. |
| Hot-insertion support | Ioff and power-up 3-state prevent current backflow and bus conflicts during live card replacement in modular systems. |
| Low ground bounce | VOLP < 0.8 V at 3.3 V - minimizes simultaneous switching noise that could corrupt adjacent signal integrity. |
| Latch-up immunity | >500 mA per JESD 17 - ensures robustness against transient overcurrent events in industrial environments. |
Applications
| Industrial Backplane Interface | Legacy System Bus Bridge |
|---|---|
Use Scenario: Interfacing a modern 3.3-V FPGA-based controller to an existing 5-V ISA or VME bus in factory automation equipment. IC Role / Device Role / Timing Role: Bidirectional register-transceiver managing synchronous data flow between voltage domains with precise clock-controlled latching. Use Value: Eliminates discrete level shifters and pull resistors while maintaining 150-MHz throughput and hot-swap capability. | Use Scenario: Upgrading a 5-V microcontroller subsystem with a 3.3-V SoC without redesigning the main system bus. IC Role / Device Role / Timing Role: Voltage-tolerant octal transceiver providing glitch-free handshaking via separate OE and CLKEN controls. Use Value: Preserves timing margins with 1.5-ns setup/hold and supports unregulated 2.7–3.6-V supply rails common in battery-backed modules. |
| Modular Test Equipment | Distributed Control Node |
Use Scenario: Hot-pluggable instrument module requiring deterministic data capture from 5-V sensor interfaces into a 3.3-V processing unit. IC Role / Device Role / Timing Role: Dual-register buffer isolating upstream/downstream clocks and enabling atomic read/write cycles across voltage boundaries. Use Value: Ioff protection prevents damage during insertion; bus-hold maintains valid bus state during module absence. | Use Scenario: Remote I/O node connecting 5-V fieldbus peripherals (e.g., RS-485 transceivers) to a 3.3-V ARM-based controller. IC Role / Device Role / Timing Role: Synchronous bus interface with independent A/B port enables time-stamped data capture and command forwarding. Use Value: 64-mA drive strength sustains signal integrity over long traces; ESD rating (2000-V HBM) withstands harsh plant-floor electrostatic conditions. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal bus transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC245APW | Non-latching, no clock inputs; only OE-controlled direction; 3.3-V only I/O (no 5-V tolerance) | Suitable for simple level-shifted data pipes without timing control or bus-hold | Select when clocked register behavior and 5-V input tolerance are not required. |
| SN74ALVCH162952GR | 16-bit (dual-octal), same register architecture but 48-pin SSOP; higher drive (±24 mA), no bus-hold | Used in wider data paths where space allows larger package and additional pins | Choose for 16-bit parallel interfaces needing identical timing control but without bus-hold dependency. |
Compared with SN74LVTH2952PWR, SN74LVC245APW lacks clocked register functionality and 5-V input tolerance, limiting use to pure level translation; SN74ALVCH162952GR scales width but sacrifices bus-hold and increases footprint-making SN74LVTH2952PWR optimal for space-constrained, mixed-voltage, register-synchronized 8-bit interconnects.
Availability
SN74LVTH2952PWR is available at Aetrix Electronics and suitable for industrial backplane interfaces, legacy system bus bridges, modular test equipment, distributed control nodes, and hot-pluggable I/O modules requiring stable component supply and long-term lifecycle support.
Supply support for SN74LVTH2952PWR 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 headquartered in Dallas, Texas, delivering analog and embedded processing solutions for industrial, automotive, and personal electronics markets.
The LVTH logic family, including SN74LVTH2952PWR, was engineered for robust mixed-voltage system interfacing-specifically targeting 3.3-V core logic bridging to legacy 5-V TTL infrastructure in industrial control and instrumentation.
FAQ
What is the maximum clock frequency supported by the SN74LVTH2952PWR?
The SN74LVTH2952PWR supports a maximum clock frequency of 150 MHz under recommended operating conditions (VCC = 3.3 V ± 0.3 V). This value is specified across the full commercial temperature range (−40°C to 85°C) and applies to both A→B and B→A data paths when their respective clock-enable inputs are asserted low. Timing parameters such as tsu and th are guaranteed to meet this rate with CL = 50 pF loads.
Does the SN74LVTH2952PWR require external pullup or pulldown resistors on its data lines?
No, the SN74LVTH2952PWR does not require external pullup or pulldown resistors on A1–A8 or B1–B8 data lines. Its integrated bus-hold circuitry provides ±75 µA of holding current at 3 V to maintain valid logic levels on unused or floating inputs. Using external resistors with the bus-hold feature is explicitly discouraged in the datasheet, as it may interfere with proper operation and increase power consumption.
Can the SN74LVTH2952PWR operate with a supply voltage lower than 3.3 V?
Yes, the SN74LVTH2952PWR is fully specified to operate from 2.7 V to 3.6 V. Its recommended operating conditions include VCC = 2.7 V minimum, supporting unregulated battery-powered applications. At 2.7 V, parameters such as VOL (0.5 V max at IOL = 24 mA), VOH (2.4 V min at IOH = −8 mA), and tPLH/tPHL (≤5.5 ns) remain guaranteed. Operation below 2.7 V places the device in high-impedance state but is outside specification.
How does the SN74LVTH2952PWR support hot insertion in modular systems?
The SN74LVTH2952PWR supports hot insertion through two complementary features: Ioff circuitry disables outputs when VCC = 0 V, preventing damaging current backflow from live backplanes into the unpowered device; and power-up 3-state ensures outputs remain high-impedance during power ramp-up (VCC < 1.5 V), avoiding bus contention. Both mechanisms are tested per JEDEC standards and are integral to the SN74LVTH2952PWR's design for live-card replacement in industrial chassis.
What package type and dimensions does the SN74LVTH2952PWR use?
The SN74LVTH2952PWR uses a TSSOP-24 (PW) package: 7.8 mm × 4.4 mm body size, 0.65-mm lead pitch, 1.2-mm maximum height, and 24 leads arranged in two gull-wing rows. Pin 1 is located in quadrant Q1 per tape-and-reel orientation. The package drawing is TI's PW0024A, compliant with JEDEC MO-153, and features a non-solder-mask-defined (NSMD) land pattern with exposed metal not electrically connected.
SN74LVTH2952PWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVTH
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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-TSSOP
SN74LVTH2952PWR FAQ
1.How can I place an order for SN74LVTH2952PWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVTH2952PWR 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 SN74LVTH2952PWR reliable?
The price and inventory of SN74LVTH2952PWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVTH2952PWR is usually 5 days.
3.What payment methods are accepted for SN74LVTH2952PWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVTH2952PWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVTH2952PWR?
SN74LVTH2952PWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVTH2952PWR 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 SN74LVTH2952PWR?
For technical support, including SN74LVTH2952PWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVTH2952PWR requirements.
6.How does Aetrix verify that SN74LVTH2952PWR is sourced from the original manufacturer or authorized distributors?
All SN74LVTH2952PWR 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 SN74LVTH2952PWR meets industry standards.
7.What is the process for return or replacement of SN74LVTH2952PWR?
All SN74LVTH2952PWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVTH2952PWR, 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 SN74LVTH2952PWR part is unused and in its original packaging.
Return procedure for SN74LVTH2952PWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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