My Inquiry
My Account
Texas Instruments SN74LVTH2952NSR
- Part No.:
- SN74LVTH2952NSR
- Manufacturer:
- Texas Instruments
- Package:
- 24-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
SN74LVTH2952NSR.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 24SO
- Quantity:
- Payment:
- Shipping:
Inventory:1,130
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74LVTH2952NSR 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 and embedded computing applications.
For engineers reviewing the SN74LVTH2952NSR datasheet, SN74LVTH2952NSR pinout, SN74LVTH2952NSR application, or SN74LVTH2952NSR equivalent, key selection considerations include its 24-pin SOP (NS) package, 150-MHz maximum clock frequency, ±100 µA Ioff at VCC = 0 V, 2.7–3.6 V supply range, and support for TTL-level interface across voltage domains.
Technical Context
The SN74LVTH2952NSR implements two independent 8-bit bidirectional data paths with separate clock (CLKAB/CLKBA), clock-enable (CLKENAB/CLKENBA), and output-enable (OEAB/OEBA) controls. Each direction operates on the low-to-high clock transition when its corresponding clock-enable is low, enabling synchronous latching of A-to-B or B-to-A data flow.
It integrates active bus-hold circuitry on all A and B port inputs to maintain valid logic states without external pullup/pulldown resistors, and uses Ioff and power-up 3-state logic to ensure high-impedance outputs during power sequencing-critical for live insertion into powered backplanes or hot-swap modules.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7 V to 3.6 V - Enables stable operation across wide industrial supply tolerances and battery-backed systems 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 components. |
| Max Clock Frequency | 150 MHz - Supports high-speed synchronous data transfer between buses in real-time control and data acquisition systems. |
| Ioff Current | ±100 µA at VCC = 0 V - Prevents damaging backflow current during hot insertion or partial power-down scenarios. |
| Bus-Hold Current | ±500 µA at VCC = 3.6 V - Actively maintains input logic state without external biasing, reducing BOM count and layout complexity. |
| Output Drive | 64 mA sink / 32 mA source at VCC = 3 V - Drives standard TTL loads directly, eliminating need for buffer stages in mixed-voltage interconnects. |
| Propagation Delay | tPLH/tPHL ≤ 5.5 ns at VCC = 3.3 V - Ensures timing margin for sub-10 ns clock domains in FPGA-to-ASIC or processor-to-peripheral interfaces. |
Pinout & Package
SN74LVTH2952NSR is housed in a 24-pin SOP (Small Outline Package) with 0.65 mm lead pitch and 7.5 mm × 12.8 mm body dimensions per TI package drawing NS0024A. The package is RoHS-compliant, moisture sensitivity level 1, and rated for −40°C to +85°C operation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1–A8 | Port A data inputs/outputs | Bidirectional data terminals for first 8-bit bus; internally registered on CLKAB edge when enabled. |
| B1–B8 | Port B data inputs/outputs | Bidirectional data terminals for second 8-bit bus; registered on CLKBA edge when enabled. |
| CLKAB | A-to-B clock input | Triggers latching of A-port data into B-port register on rising edge when CLKENAB = L. |
| CLKBA | B-to-A clock input | Triggers latching of B-port data into A-port register on rising edge when CLKENBA = L. |
| CLKENAB | A-to-B clock enable | Active-low control: disables CLKAB sampling when high, preventing unintended register updates. |
| CLKENBA | B-to-A clock enable | Active-low control: disables CLKBA sampling when high, isolating B-to-A data flow. |
| OEAB | A-to-B output enable | Active-low: places A-port drivers in high-Z when high; enables A→B data transmission when low. |
| OEBA | B-to-A output enable | Active-low: places B-port drivers in high-Z when high; enables B→A data transmission when low. |
| VCC | Power supply | 3.3-V nominal supply; supports operation down to 2.7 V with full specification compliance. |
| GND | Ground reference | Common return path for all I/O and internal logic; must be low-impedance for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode voltage interface | 5-V-tolerant inputs/outputs with 3.3-V VCC enable seamless integration between legacy 5-V logic and modern low-voltage systems without external translators. |
| Integrated bus-hold | Eliminates need for 10-kΩ external pullup/pulldown resistors on all 16 data lines, reducing PCB area and assembly cost while improving signal integrity on unterminated stubs. |
| Hot-insertion support | Ioff and power-up 3-state ensure outputs remain high-impedance during power ramp-up/down, preventing bus contention and backdrive damage in modular backplane architectures. |
| Low ground bounce | VOLP < 0.8 V at VCC = 3.3 V ensures minimal switching noise on shared ground planes, critical for mixed-signal systems with ADCs or precision analog circuits. |
| Latch-up immunity | Exceeds 500 mA per JESD17 - guarantees robustness against transient overvoltage events and ESD-induced latch-up in harsh industrial environments. |
Applications
| Industrial Backplane Interface | Processor-to-FPGA Data Bridge |
|---|---|
Use Scenario: Interfacing a 3.3-V microcontroller unit to a 5-V legacy PLC backplane with bidirectional command/status exchange. IC Role / Device Role / Timing Role: Bidirectional bus transceiver and register synchronizing data transfers between voltage domains using independent clock domains per direction. Use Value: Eliminates discrete level shifters and external bus-hold resistors while maintaining 150-MHz throughput and hot-swap capability during field maintenance. | Use Scenario: Connecting an ARM Cortex-A series SoC (3.3-V I/O) to a Xilinx Artix-7 FPGA (5-V tolerant banks) for real-time sensor fusion data streaming. IC Role / Device Role / Timing Role: Synchronous octal register buffering data in both directions with independent OE and CLK controls to manage burst-mode transfers and handshake timing. Use Value: Provides deterministic setup/hold timing (tsu ≥ 1.5 ns, th ≥ 0.2 ns) and 5.5 ns max propagation delay, enabling reliable DDR-style handshaking without custom timing constraints. |
| Hot-Swappable Module Communication | Automotive Diagnostic Gateway |
Use Scenario: Enabling live insertion of CAN/LIN communication modules into a powered vehicle infotainment head unit with shared 3.3-V/5-V data bus. IC Role / Device Role / Timing Role: Isolation and voltage translation layer with Ioff protection and power-up 3-state ensuring zero current injection during module insertion/removal. Use Value: Meets ISO 16750-2 pulse test requirements via 500 mA latch-up immunity and 2000-V HBM ESD rating, supporting automotive-grade reliability without additional protection circuitry. | Use Scenario: Bridging OBD-II diagnostic port (5-V UART) to a 3.3-V automotive microcontroller for firmware updates and real-time parameter monitoring. IC Role / Device Role / Timing Role: Level-translating UART data path with bus-hold preserving idle-line logic state during cable disconnect or ECU sleep transitions. Use Value: Maintains valid logic levels on floating RX/TX lines without pull resistors, preventing false start bits and UART framing errors during intermittent connectivity. |
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 | No internal registers; asynchronous direction control only; no clock-enable or bus-hold; 3.3-V only I/O (no 5-V tolerance) | Suitable for simple unidirectional/bidirectional level shifting where timing synchronization is not required | Select when clocked register functionality and 5-V interface are unnecessary and lower static power is prioritized. |
| SN74AVC8T245RHLR | Higher speed (380-MHz max), smaller 24-pin VQFN package, no bus-hold, supports 1.2–3.6 V VCC but only 3.6-V max I/O tolerance | Better for space-constrained, high-frequency applications like PCIe sideband or MIPI bridge where 5-V compatibility is absent | Choose for compact layouts and faster clocks, but verify 5-V system compatibility is not needed. |
Compared with SN74LVC245APW and SN74AVC8T245RHLR, the SN74LVTH2952NSR uniquely combines 5-V-tolerant I/O, integrated bus-hold, synchronous dual-register architecture, and hot-insertion support-making it the only option among the three qualified for mixed-voltage, hot-swap, and register-synchronized bus bridging.
Availability
SN74LVTH2952NSR is available at Aetrix Electronics and suitable for industrial automation, automotive diagnostics, and embedded computing applications requiring stable component supply, long-term lifecycle support, and guaranteed traceable sourcing.
Supply support for SN74LVTH2952NSR 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, automotive, and communications markets.
The SN74LVTH2952NSR belongs to TI's LVTH logic family, engineered specifically for robust mixed-voltage system interfacing, hot-plug resilience, and reduced external component count in mission-critical embedded data paths.
FAQ
What is the operating temperature range for SN74LVTH2952NSR?
The SN74LVTH2952NSR is specified for operation from −40°C to +85°C ambient temperature. This industrial-grade range ensures reliable performance in factory automation controllers, outdoor telecom equipment, and automotive under-hood modules where thermal cycling and extended temperature exposure occur. All electrical characteristics-including propagation delay, drive strength, and bus-hold current-are guaranteed across this full range per the SCBS710F datasheet.
Does SN74LVTH2952NSR require external pullup resistors on its data lines?
No, SN74LVTH2952NSR does not require external pullup or pulldown resistors on A1–A8 or B1–B8 data lines due to its integrated bus-hold circuitry. This feature actively maintains valid logic states on unused or floating inputs, eliminating BOM cost and PCB routing overhead. Using external resistors with SN74LVTH2952NSR is explicitly discouraged in the datasheet as it may interfere with bus-hold operation and increase power consumption.
Can SN74LVTH2952NSR be used in hot-swap applications?
Yes, SN74LVTH2952NSR is explicitly designed for hot-insertion applications. Its Ioff circuitry disables outputs and limits current to ±100 µA when VCC = 0 V, preventing damaging backflow. Power-up 3-state ensures outputs remain high-impedance during power ramp-up/down. These features are validated per JEDEC standards and documented in the SCBS710F datasheet, making SN74LVTH2952NSR suitable for modular backplanes and field-replaceable units.
What package type is SN74LVTH2952NSR supplied in?
SN74LVTH2952NSR is supplied in a 24-pin SOP (Small Outline Package) with 0.65 mm lead pitch, designated as NS package by Texas Instruments. Its dimensions are 7.5 mm × 12.8 mm with 1.75 mm height, RoHS-compliant, and rated MSL-1 for unlimited floor life. This package is optimized for automated surface-mount assembly and offers better thermal performance than TSSOP variants like PW.
How does SN74LVTH2952NSR handle 5-V signals while operating at 3.3-V VCC?
SN74LVTH2952NSR supports 5-V-tolerant inputs and outputs while powered from a 3.3-V supply (VCC = 2.7–3.6 V). Its input structure accepts up to 5.5 V, and output drivers swing rail-to-rail within the 3.3-V domain while sourcing/sinking TTL-compatible currents (64 mA sink, 32 mA source). This eliminates external level shifters in mixed-voltage systems-confirmed by absolute maximum ratings and recommended operating conditions in the SCBS710F datasheet.
SN74LVTH2952NSR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVTH
- Package/Case:
- 24-SOIC (0.209", 5.30mm 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-SO
SN74LVTH2952NSR FAQ
1.How can I place an order for SN74LVTH2952NSR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVTH2952NSR 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 SN74LVTH2952NSR reliable?
The price and inventory of SN74LVTH2952NSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVTH2952NSR is usually 5 days.
3.What payment methods are accepted for SN74LVTH2952NSR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVTH2952NSR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVTH2952NSR?
SN74LVTH2952NSR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVTH2952NSR 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 SN74LVTH2952NSR?
For technical support, including SN74LVTH2952NSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVTH2952NSR requirements.
6.How does Aetrix verify that SN74LVTH2952NSR is sourced from the original manufacturer or authorized distributors?
All SN74LVTH2952NSR 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 SN74LVTH2952NSR meets industry standards.
7.What is the process for return or replacement of SN74LVTH2952NSR?
All SN74LVTH2952NSR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVTH2952NSR, 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 SN74LVTH2952NSR part is unused and in its original packaging.
Return procedure for SN74LVTH2952NSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74LVTH2952NSR Tags
-
SN74LVC1G17DBVR
Texas Instruments
-
SN74LVC1G07DCKR
Texas Instruments
-
SN74LVC1G17DCKR
Texas Instruments
-
SN74LVC1G07DBVR
Texas Instruments
-
SN74LVC1G125DCKR
Texas Instruments
-
SN74AHCT1G126DBVR
Texas Instruments
-
SN74LVC1G125DBVR
Texas Instruments
-
SN74AHCT1G125DBVR
Texas Instruments
-
SN74LVC2G17DBVR
Texas Instruments
-
SN74LVC2G07DCKR
Texas Instruments
-
SN74LVC1G34DCKR
Texas Instruments
-
SN74LVC2G17DCKR
Texas Instruments
Tech Hub
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
