My Inquiry
My Account
Texas Instruments SN74LVC2952DBLE
- Part No.:
- SN74LVC2952DBLE
- Manufacturer:
- Texas Instruments
- Package:
- -
- Datasheet:
-
SN74LVC2952DBLE.pdf
- Description:
- REGISTERED BUS TRANSCEIVER
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
SN74LVC2952DBLE 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, delivers 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 logic and legacy 5-V subsystems.
For engineers reviewing the SN74LVC2952DBLE datasheet, SN74LVC2952DBLE pinout, SN74LVC2952DBLE application, or SN74LVC2952DBLE equivalent, key selection criteria include its dual-clock-controlled register architecture, 24-pin SSOP (DB) package, 3.6-V absolute maximum input voltage tolerance, and guaranteed 3-state output isolation during power sequencing.
Technical Context
The SN74LVC2952DBLE integrates two independent 8-bit back-to-back registers enabling synchronous latching of A-to-B or B-to-A data on the low-to-high transition of CLKAB or CLKBA, respectively, when corresponding CLKENAB/CLKENBA is low. Each direction has dedicated clock-enable and output-enable controls, allowing independent timing and tri-state management.
Its Ioff circuitry actively disables outputs when VCC = 0 V, preventing backflow current in partial-power-down scenarios. Input voltage tolerance up to 5.5 V-regardless of VCC-enables direct interfacing with 5-V drivers while operating at 1.65–3.6 V, making it suitable for voltage-translation bridges without external level shifters.
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 1.8-V and 3.3-V systems. |
| Input Voltage Tolerance | Up to 5.5 V - Allows direct connection to 5-V CMOS/TTL outputs without clamping diodes or external resistors. |
| Max Propagation Delay | 8.2 ns at VCC = 3.3 V - Supports high-speed data transfer up to ~120 MHz system clock rates in registered mode. |
| Ioff Current | ±10 µA at VI/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/LVT inputs under load. |
| 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 conditions. |
Pinout & Package
SN74LVC2952DBLE is housed in a 24-pin SSOP (Shrink Small-Outline Package), DB package, with 0.64-mm lead pitch, 8.2-mm body width, and JEDEC MO-150 compliance. Pin 1 is located at top-left corner (Q1 quadrant), marked by a beveled corner or dot.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A1–A8 | Input/Output port A | 8-bit bidirectional data bus side A; driven by or drives external logic depending on OEAB state. |
| B1–B8 | Input/Output port B | 8-bit bidirectional data bus side B; functionally symmetric to A-side with separate control signals. |
| OEAB | Output enable A→B | Active-low control enabling A-port drivers to drive B-bus; high = 3-state (high-Z) on B outputs. |
| OEBA | Output enable B→A | Active-low control enabling B-port drivers to drive A-bus; high = 3-state on A outputs. |
| CLKAB | Register clock A→B | Low-to-high edge captures A-bus data into A→B register; only active when CLKENAB = low. |
| CLKBA | Register clock B→A | Low-to-high edge captures B-bus data into B→A register; only active when CLKENBA = low. |
| CLKENAB | Enable for CLKAB | Active-low gate for CLKAB; when high, CLKAB transitions are ignored and A→B register holds last value. |
| CLKENBA | Enable for CLKBA | Active-low gate for CLKBA; when high, CLKBA transitions are ignored and B→A register holds last value. |
| VCC | Power supply | Primary supply for internal logic and output drivers; must be decoupled locally with 0.1-µF ceramic capacitor. |
| GND | Ground reference | Common return path for all I/O and internal circuitry; requires low-inductance connection to system ground plane. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode signal operation | 5-V-tolerant inputs with 1.65–3.6-V VCC enables seamless interface between 3.3-V microcontrollers and 5-V peripherals. |
| Dual independent register control | Separate CLKAB/CLKENAB and CLKBA/CLKENBA pairs allow asynchronous latching and forwarding in each direction. |
| Ioff partial-power-down support | Prevents damaging current flow when VCC = 0 V, critical for hot-swap and multi-rail power sequencing designs. |
| 3-state output isolation | Guaranteed high-impedance state during power-up/down when OE is tied to VCC via pullup resistor. |
| Low ground bounce & undershoot | Typical VOLP < 0.8 V and VOHV > 2 V at 3.3 V reduce switching noise coupling into adjacent signal paths. |
Applications
| Industrial PLC Backplane Interface | Embedded System Memory Expansion Bridge |
|---|---|
Use Scenario: Connecting a 3.3-V ARM-based controller to legacy 5-V I/O modules over a shared parallel backplane. IC Role / Device Role / Timing Role: Bidirectional level-translating transceiver with registered data capture, synchronizing asynchronous bus transactions to local clock domain. Use Value: Eliminates need for discrete level shifters and glue logic; ensures clean setup/hold timing via controlled clock edges and 3-state bus arbitration. | Use Scenario: Extending SRAM or Flash memory address/data bus between a low-voltage SoC and higher-voltage memory chips. IC Role / Device Role / Timing Role: Registered bus repeater providing timing margin and voltage translation for wide parallel memory interfaces. Use Value: Improves signal integrity over longer traces by reducing capacitive loading and enabling precise edge-aligned sampling at destination. |
| Automotive Body Control Module Gateway | Test Equipment Digital Pattern Generator |
Use Scenario: Interfacing a 3.3-V CAN/FlexRay microcontroller to 5-V analog sensor conditioning circuits and relay drivers. IC Role / Device Role / Timing Role: Isolated bidirectional data conduit with fail-safe 3-state behavior during MCU reset or brownout. Use Value: Maintains bus integrity during power transitions; Ioff prevents backfeed from powered peripherals into unpowered MCU domain. | Use Scenario: Generating synchronized stimulus patterns for DUTs requiring both 3.3-V and 5-V logic-level test vectors. IC Role / Device Role / Timing Role: Programmable pattern repeater with independent A/B clocking, enabling deterministic waveform generation across voltage domains. Use Value: Delivers glitch-free, edge-aligned test signals with precise timing control and voltage compatibility across mixed-signal test fixtures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal registered transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC2952ADBR | Same die, identical electrical specs, active production status, 2000-piece reel packaging. | No functional difference; preferred for volume production due to active status and RoHS/Green compliance. | Select SN74LVC2952ADBR for new designs requiring long-term supply assurance and standard tape-and-reel logistics. |
| SN74LVC2952APWR | Same functionality in TSSOP-24 (PW) package; 0.65-mm pitch vs. DB's 0.64-mm; slightly higher θJA (88°C/W). | Smaller footprint and better thermal performance in space-constrained layouts; requires different PCB land pattern. | Choose SN74LVC2952APWR when board area is constrained and TSSOP assembly capability exists. |
Compared with SN74LVC2952DBLE, SN74LVC2952ADBR offers guaranteed long-term availability and identical performance in the same SSOP package, while SN74LVC2952APWR provides a smaller-footprint alternative with trade-offs in thermal resistance and mechanical layout compatibility.
Availability
SN74LVC2952DBLE is available at Aetrix Electronics and suitable for industrial automation, embedded memory expansion, and automotive gateway applications requiring stable component supply and mixed-voltage interoperability.
Supply support for SN74LVC2952DBLE 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 specializing in analog, embedded processing, and logic solutions, with leadership in industrial, automotive, and communications markets.
The SN74LVC2952DBLE belongs to TI's LVC logic family, engineered for low-voltage, high-speed, mixed-signal interfacing in systems demanding voltage translation, bus isolation, and registered data synchronization.
FAQ
What is the recommended power-up sequence for SN74LVC2952DBLE to ensure reliable 3-state behavior?
TI recommends tying OEAB and OEBA to VCC through a pullup resistor (minimum value determined by driver sink capability) to guarantee high-impedance outputs during power-up. For SN74LVC2952DBLE, this prevents bus contention before the controlling MCU initializes. The Ioff feature further protects against backfeed if VCC ramps after other rails. No external reset sequencing is required beyond standard decoupling.
Does SN74LVC2952DBLE support true bidirectional data flow without external direction control logic?
Yes. SN74LVC2952DBLE implements fully independent A↔B data paths with dedicated OEAB/OEBA and CLKAB/CLKBA controls. Data can flow from A to B and B to A simultaneously, with each direction governed by its own clock and enable signals-no external direction pin or bus arbitration logic is needed.
Can SN74LVC2952DBLE be used as a simple level shifter without using the register functionality?
Yes. By holding CLKENAB and CLKENBA high, the internal registers are disabled and SN74LVC2952DBLE operates as a transparent 3-state transceiver. Inputs remain 5.5-V tolerant, outputs swing rail-to-rail within VCC range, and OEAB/OEBA directly control output states-making it suitable for non-registered voltage translation.
What is the maximum clock frequency supported by SN74LVC2952DBLE in registered mode?
Per TI's switching characteristics table, SN74LVC2952DBLE supports a maximum clock frequency (fmax) of 150 MHz at VCC = 2.7 V ± 0.15 V and VCC = 3.3 V ± 0.3 V. This assumes proper signal integrity, termination, and load capacitance ≤50 pF. At lower VCC (e.g., 1.8 V), fmax drops to 150 MHz but with relaxed timing margins.
Is SN74LVC2952DBLE pin-compatible with other members of the SN74LVC2952 family?
Yes. All variants-including SN74LVC2952ADBR, SN74LVC2952APWR, and SN74LVC2952ADW-share identical 24-pin pinouts and logic functions. SN74LVC2952DBLE uses the DB (SSOP) package, matching SN74LVC2952ADBR pin-for-pin. Differences are limited to packaging, marking, and lifecycle status-not electrical or mechanical compatibility.
SN74LVC2952DBLE Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Input Type:
- -
- Output Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
SN74LVC2952DBLE FAQ
1.How can I place an order for SN74LVC2952DBLE through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC2952DBLE 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 SN74LVC2952DBLE reliable?
The price and inventory of SN74LVC2952DBLE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC2952DBLE is usually 5 days.
3.What payment methods are accepted for SN74LVC2952DBLE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC2952DBLE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC2952DBLE?
SN74LVC2952DBLE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC2952DBLE 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 SN74LVC2952DBLE?
For technical support, including SN74LVC2952DBLE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC2952DBLE requirements.
6.How does Aetrix verify that SN74LVC2952DBLE is sourced from the original manufacturer or authorized distributors?
All SN74LVC2952DBLE 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 SN74LVC2952DBLE meets industry standards.
7.What is the process for return or replacement of SN74LVC2952DBLE?
All SN74LVC2952DBLE units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC2952DBLE, 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 SN74LVC2952DBLE part is unused and in its original packaging.
Return procedure for SN74LVC2952DBLE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74LVC2952DBLE 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…
