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Texas Instruments SN74LVC2952APWT
- Part No.:
- SN74LVC2952APWT
- Manufacturer:
- Texas Instruments
- Package:
- 24-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVC2952APWT.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 24TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,940
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Product details
Overview
SN74LVC2952APWT from Texas Instruments is an octal bus transceiver and register with 3-state outputs, designed for bidirectional data flow between two 8-bit buses in mixed-voltage systems. It operates from 1.65 V to 3.6 V, supports 5.5-V-tolerant inputs, achieves 8.2 ns max propagation delay at 3.3 V, and features Ioff partial-power-down protection. It is used in level-shifting interfaces between 3.3-V and 5-V logic domains in industrial control backplanes.
For engineers reviewing the SN74LVC2952APWT datasheet, SN74LVC2952APWT pinout, SN74LVC2952APWT application, or SN74LVC2952APWT equivalent, key selection criteria include its dual-clock-register architecture, 24-pin TSSOP package, 3.3-V/5-V mixed-mode compatibility, and guaranteed 3-state output isolation during power sequencing.
Technical Context
The SN74LVC2952APWT integrates two independent 8-bit registers - one for A-to-B and one for B-to-A data flow - each controlled by dedicated clock (CLKAB/CLKBA), clock-enable (CLKENAB/CLKENBA), and output-enable (OEAB/OEBA) signals. Its dual-register structure enables synchronous latching in both directions without bus contention.
It implements true 3-state outputs with Ioff circuitry that disables all outputs when VCC = 0 V, preventing backflow current during partial power-down. Input tolerance up to 5.5 V allows direct interfacing with legacy 5-V drivers while powered from a 3.3-V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - Enables operation across low-voltage logic families including LVC and AVC series. |
| Input Voltage Tolerance | Up to 5.5 V - Allows direct connection to 5-V CMOS/TTL outputs without external level shifters. |
| Max Propagation Delay | 8.2 ns at VCC = 3.3 V - Supports >100 MHz clock rates in registered data paths. |
| Ioff Current | ±10 µA at VI or VO = 5.5 V - Ensures safe isolation during hot-insertion or partial power-down sequences. |
| Output Drive Strength | ±24 mA at VCC = 3.0 V - Drives standard 50-Ω transmission lines or multiple LVC loads. |
| ESD Protection | 2000-V HBM, 1000-V CDM - Meets industrial-grade robustness requirements per JESD22. |
| Operating Temperature | –40°C to +85°C - Qualified for extended industrial ambient environments. |
Pinout & Package
TSSOP-24 (PW) package: 7.8 mm × 4.4 mm body, 0.65 mm pitch, 1.2 mm max height, lead-free NIPDAU finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1–A8 | Port A data inputs/outputs | Bidirectional I/O pins for first 8-bit bus; 3-state when OEAB high. |
| B1–B8 | Port B data inputs/outputs | Bidirectional I/O pins for second 8-bit bus; 3-state when OEBA high. |
| CLKAB | A-to-B clock input | Triggers capture of A-bus data into A-to-B register on rising edge. |
| CLKBA | B-to-A clock input | Triggers capture of B-bus data into B-to-A register on rising edge. |
| CLKENAB | A-to-B clock enable | Low enables CLKAB; high freezes A-to-B register regardless of CLKAB transitions. |
| CLKENBA | B-to-A clock enable | Low enables CLKBA; high freezes B-to-A register regardless of CLKBA transitions. |
| OEAB | A-to-B output enable | Low enables A-bus drivers; high places A1–A8 in high-impedance state. |
| OEBA | B-to-A output enable | Low enables B-bus drivers; high places B1–B8 in high-impedance state. |
| VCC | Power supply | 1.65–3.6 V core supply; powers internal logic and output drivers. |
| GND | Ground reference | Common return path for all I/O and internal circuitry. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent register banks | Enables concurrent, non-blocking A↔B data transfer with separate clocking and enable controls. |
| Mixed-mode voltage translation | Accepts 5-V inputs while operating at 3.3-V VCC - eliminates need for discrete level shifters in 3.3/5-V interconnects. |
| Ioff partial-power-down support | Prevents damaging current flow when VCC = 0 V - critical for hot-swap and modular backplane designs. |
| Controlled output switching | Typical VOLP < 0.8 V and VOHV > 2 V at 3.3 V - minimizes ground bounce and undershoot in high-speed bus applications. |
| Industry-standard timing | Setup/hold times specified down to 1.3 ns (VCC = 2.7 V) - ensures reliable interface with FPGA I/O and microcontroller peripherals. |
Applications
| Industrial Backplane Interface | Legacy System Integration |
|---|---|
Use Scenario: Connecting a modern 3.3-V FPGA-based controller to an older 5-V PLC I/O module via shared parallel bus. IC Role / Device Role / Timing Role: Bidirectional level-translating transceiver with registered data capture on both sides, synchronized to system clock domains. Use Value: Eliminates external level shifters and glue logic; ensures deterministic timing via clocked registers and 3-state bus arbitration. | Use Scenario: Upgrading a 5-V microcontroller subsystem to 3.3-V logic while retaining compatibility with existing 5-V peripheral ASICs. IC Role / Device Role / Timing Role: Voltage-tolerant bus interface providing synchronous data exchange and power-domain isolation. Use Value: Enables phased migration without board redesign; Ioff prevents backfeed during brown-out conditions on either side. |
| Test Equipment Data Bus | Programmable Logic Interconnect |
Use Scenario: High-reliability data acquisition system where DUT signals are routed through a reconfigurable 8-bit bus matrix. IC Role / Device Role / Timing Role: Registered transceiver acting as programmable bus switch with glitch-free 3-state control. Use Value: Provides deterministic sampling windows and eliminates bus contention during configuration changes. | Use Scenario: Interfacing Xilinx Spartan-7 FPGA I/O banks (3.3-V LVCMOS) to external memory-mapped peripherals operating at 5-V TTL levels. IC Role / Device Role / Timing Role: Synchronous bidirectional bridge with independent clock enables for precise timing alignment. Use Value: Matches FPGA register-to-register timing budgets; supports full-speed access without added setup/hold margin penalties. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal registered transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC245APW | No internal registers; unidirectional (A→B only); lacks CLK/CLKEN inputs. | Suitable only for simple level-shifted data forwarding, not synchronous bidirectional buffering. | Select when clocked registration and dual-direction control are unnecessary and cost is primary. |
| SN74ALVC162952GR | 16-bit version in 48-pin TSSOP; higher drive (±24 mA @ 2.5 V); same VCC range and Ioff. | Used in wider data paths (e.g., 16-bit microprocessor buses); requires larger PCB footprint and layout revision. | Select when scaling to 16-bit width is required and board space permits larger package. |
Compared with SN74LVC245APW and SN74ALVC162952GR, the SN74LVC2952APWT uniquely provides 8-bit bidirectional registered transfer in a compact 24-pin TSSOP, balancing timing control, voltage flexibility, and board-space efficiency for mid-width industrial interconnects.
Availability
SN74LVC2952APWT is available at Aetrix Electronics and suitable for industrial backplane interfaces, legacy system integration, test equipment data buses, and FPGA-peripheral interconnects requiring stable component supply and long-term manufacturability.
Supply support for SN74LVC2952APWT 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and personal electronics markets.
The SN74LVC2952APWT belongs to TI's LVC logic family - engineered for low-voltage, high-speed, mixed-signal interfacing with robust noise immunity and power-down safety in real-world industrial environments.
FAQ
What is the maximum clock frequency supported by the SN74LVC2952APWT?
The SN74LVC2952APWT supports a maximum clock frequency of 150 MHz under recommended operating conditions (VCC = 2.7 V to 3.3 V). This rating is derived from timing specifications including minimum pulse width (3.3 ns) and setup/hold times (as low as 1.1 ns), enabling reliable operation in high-speed synchronous bus applications. The actual usable frequency depends on signal integrity, load capacitance, and PCB routing.
Does the SN74LVC2952APWT require external pull-up resistors on OE pins?
Yes - to ensure high-impedance outputs during power-up or power-down, OEAB and OEBA should be tied to VCC through pull-up resistors. TI recommends a minimum resistor value determined by the current-sinking capability of the driving source; typical values range from 4.7 kΩ to 10 kΩ. This prevents undefined bus states before system initialization completes.
Can the SN74LVC2952APWT operate with VCC = 1.8 V while interfacing with 5-V inputs?
Yes - the SN74LVC2952APWT supports VCC as low as 1.65 V and accepts input voltages up to 5.5 V on all A and B port pins. At VCC = 1.8 V, it maintains full 5-V input tolerance, making it suitable for ultra-low-power systems interfacing with legacy 5-V peripherals without level-shifting components.
How does the Ioff feature function in the SN74LVC2952APWT?
The Ioff feature in the SN74LVC2952APWT disables all outputs when VCC = 0 V, limiting off-state current to ±10 µA even if 5.5-V signals are present on A or B ports. This prevents damaging current backflow through the device during hot-swap, partial power-down, or system reset sequences - a critical requirement for modular industrial hardware.
Is the SN74LVC2952APWT pin-compatible with earlier SN74LVC2952 variants?
Yes - the SN74LVC2952APWT shares identical pinout, electrical characteristics, and functional behavior with other SN74LVC2952 variants (e.g., SN74LVC2952ADBR, SN74LVC2952APWR) in the same TSSOP-24 (PW) package. Differences are limited to packaging format (tape-and-reel vs. tube) and part marking; no design changes affect schematic or layout reuse.
SN74LVC2952APWT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 24-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- 24mA, 24mA
- Voltage - Supply:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 24-TSSOP
SN74LVC2952APWT FAQ
1.How can I place an order for SN74LVC2952APWT through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC2952APWT 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 SN74LVC2952APWT reliable?
The price and inventory of SN74LVC2952APWT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC2952APWT is usually 5 days.
3.What payment methods are accepted for SN74LVC2952APWT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC2952APWT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC2952APWT?
SN74LVC2952APWT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC2952APWT 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 SN74LVC2952APWT?
For technical support, including SN74LVC2952APWT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC2952APWT requirements.
6.How does Aetrix verify that SN74LVC2952APWT is sourced from the original manufacturer or authorized distributors?
All SN74LVC2952APWT 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 SN74LVC2952APWT meets industry standards.
7.What is the process for return or replacement of SN74LVC2952APWT?
All SN74LVC2952APWT units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC2952APWT, 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 SN74LVC2952APWT part is unused and in its original packaging.
Return procedure for SN74LVC2952APWT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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