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NXP Semiconductors 74LVT2952D,112
- Part No.:
- 74LVT2952D,112
- Manufacturer:
- NXP Semiconductors
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74LVT2952D,112.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 24SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,287
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Product details
Overview
74LVT2952D,112 from NXP Semiconductors is a 3.3 V octal registered transceiver with independent A/B bus registers, 3-state outputs, ±32 mA drive capability, and bus-hold inputs. It operates across −40 °C to +85 °C in SO24 package and enables bidirectional data latching between 3.3 V logic domains interfacing with 5 V systems-used in high-speed backplane and memory interface buffering.
For engineers reviewing the 74LVT2952D,112 datasheet, 74LVT2952D,112 pinout, 74LVT2952D,112 application, or 74LVT2952D,112 equivalent, key selection criteria include clocked register synchronization, dual-direction 3-state control (OEAB/OEBA), 5 V-tolerant I/O, and sub-6 ns propagation delay at 3.3 V.
Technical Context
The 74LVT2952D,112 implements two independent 8-bit D-type flip-flop registers-one for A→B direction (CPAB/CEAB/OEAB) and one for B→A (CPBA/CEBA/OEBA)-each with separate clock, enable, and output-enable controls. Its BiCMOS architecture delivers TTL-compatible switching levels while maintaining low static current (≤0.19 mA) and high-speed operation up to 200 MHz.
Input clamping and bus-hold circuitry eliminate external pull-ups on unused pins; live insertion/extraction and power-up 3-state ensure system-level robustness. The device supports mixed-voltage interoperation: 3.3 V VCC supply with 0–5.5 V input voltage tolerance and 5 V-bus compatible outputs without loading current.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply | 2.7 V to 3.6 V - ensures compatibility with standard 3.3 V logic rails and margin for supply variation |
| Propagation Delay | 1.3–6.1 ns (tPLH/tPHL at 3.3 V) - enables ≤200 MHz clock operation in synchronous bus interfaces |
| Output Drive | +64 mA / −32 mA sink/source - drives heavy capacitive loads and multiple TTL inputs without external buffers |
| Input Voltage Range | 0 V to 5.5 V - allows direct connection to 5 V buses without level shifters |
| Bus-Hold Current | ±75 µA to ±150 µA - maintains valid logic state on floating inputs, eliminating external pull resistors |
| ESD Protection | HBM >2000 V, MM >200 V - meets industrial handling requirements without additional protection circuitry |
| Operating Temperature | −40 °C to +85 °C - qualified for extended industrial environments including base station and networking equipment |
Pinout & Package
74LVT2952D,112 is housed in a plastic small outline package (SO24, SOT137-1) with 24 leads and 7.5 mm body width. Pin 1 is index-marked; lead pitch is 1.27 mm.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A0–A7 (16–23) | Data I/O (A-side) | Bidirectional data path for A bus; latched on CPBA rising edge when CEBA = L |
| B0–B7 (1–8) | Data I/O (B-side) | Bidirectional data path for B bus; latched on CPAB rising edge when CEAB = L |
| CPAB (10), CPBA (14) | Register Clock Inputs | Edge-triggered clocks controlling A↔B register load timing; independent for each direction |
| CEAB (11), CEBA (13) | Register Enable Inputs | Active-Low enables clock sampling of data into respective A or B register |
| OEAB (9), OEBA (15) | Output Enable Inputs | Active-Low controls 3-state output drivers for A↔B data paths independently |
| VCC (24) | Supply Voltage | 3.3 V nominal supply; accepts 2.7–3.6 V range with full performance guarantee |
| GND (12) | Ground Reference | 0 V return for all internal logic and I/O circuits; must be low-impedance for noise immunity |
Key Features
| Feature | Design Value |
|---|---|
| Independent A/B Registers | Enables simultaneous bidirectional data latching with separate clocking and control-critical for full-duplex bus arbitration |
| 5 V-Tolerant I/O | Accepts 0–5.5 V inputs and drives 5 V buses without level translation, simplifying mixed-voltage board design |
| Bus-Hold Inputs | Eliminates need for external pull-up/down resistors on unused data lines, reducing BOM count and layout area |
| Live Insertion Support | Power-up 3-state and controlled output disable allow hot-swap capability in modular backplane systems |
| Latch-Up Immunity | Exceeds 500 mA per JESD78 Class II Level A-ensures reliability in noisy industrial power environments |
Applications
| High-Speed Backplane Interface | Memory Subsystem Buffering |
|---|---|
Use Scenario: Bidirectional data transfer between CPU and peripheral modules across a 24-bit parallel backplane operating at >100 MHz. IC Role / Device Role / Timing Role: Registered transceiver synchronizing A/B bus traffic with independent clock enables and output enables to prevent metastability and bus contention. Use Value: Sub-6 ns propagation delay and 200 MHz max frequency support deterministic timing closure; bus-hold prevents floating states during module insertion/removal. |
Use Scenario: Interfacing a 3.3 V microcontroller to legacy 5 V SRAM or Flash memory with shared address/data bus. IC Role / Device Role / Timing Role: Level-shifting registered buffer isolating controller I/O from memory bus, with clocked write data capture and 3-state read data output. Use Value: 5 V-tolerant inputs/outputs eliminate discrete level shifters; ±32 mA drive ensures fast memory access setup/hold margins. |
| Industrial PLC I/O Expansion | Test Equipment Signal Conditioning |
Use Scenario: Adding isolated digital I/O channels to a programmable logic controller via expansion slot with shared 3.3 V control bus and 5 V field-side signals. IC Role / Device Role / Timing Role: Direction-controlled registered transceiver managing data flow between controller domain and field I/O modules with ESD-hardened I/O. Use Value: HBM >2000 V and latch-up immunity >500 mA withstand industrial ESD events; wide temperature range supports cabinet-mounted deployment. |
Use Scenario: Signal conditioning stage in automated test equipment where DUT signals require synchronized sampling and buffered output to measurement ASICs. IC Role / Device Role / Timing Role: Clocked data capture and retransmission element aligning asynchronous DUT outputs to system clock domain with precise edge control. Use Value: Independent CPAB/CPBA and OEAB/OEBA allow precise timing alignment of stimulus/response paths; low skew ensures measurement repeatability. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar registered transceiver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC2952APWR | 3.3 V CMOS-only; lower drive (±24 mA); no bus-hold; 1.65–3.6 V VCC range | Suitable for lower-power, single-supply 3.3 V systems without 5 V bus interfacing | Select when 5 V tolerance and bus-hold are not required and power budget is constrained |
| 74ALVCH162952GR | 16-bit version in TSSOP-48; higher drive (±24 mA); 1.65–3.6 V VCC; no 5 V tolerance | Used in wider data-path applications requiring 16-bit synchronized transfer | Choose for 16-bit bus extension where pin count and board space permit larger package |
Compared with SN74LVC2952APWR and 74ALVCH162952GR, the 74LVT2952D,112 uniquely combines 5 V-tolerant I/O, bus-hold, and ±32 mA drive in an 8-bit SO24 package-making it optimal for mixed-voltage industrial backplanes where signal integrity and robustness outweigh raw density or ultra-low power.
Availability
74LVT2952D,112 is available at Aetrix Electronics and suitable for high-speed backplane interfaces, memory subsystem buffering, industrial PLC I/O expansion, and test equipment signal conditioning requiring stable component supply and long-term industrial lifecycle support.
Supply support for 74LVT2952D,112 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
NXP Semiconductors is a global semiconductor company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.
The 74LVT2952D,112 belongs to NXP's LVT (Low-Voltage TTL) logic family, designed specifically for high-speed, mixed-voltage digital interfacing in industrial and communications infrastructure where reliability, noise immunity, and 5 V compatibility are critical.
FAQ
What is the maximum clock frequency supported by the 74LVT2952D,112?
The 74LVT2952D,112 supports a maximum clock frequency of 200 MHz at VCC = 3.3 V ± 0.3 V, as specified in the dynamic characteristics table. This rating assumes proper load conditions (CL = 50 pF, RL = 500 Ω) and ambient temperature within −40 °C to +85 °C. At 2.7 V, the guaranteed fmax drops to 150 MHz due to reduced slew rate and propagation margin.
Does the 74LVT2952D,112 support 5 V logic levels on its I/O pins?
Yes, the 74LVT2952D,112 supports 5 V-tolerant inputs and outputs: VI is rated 0–5.5 V, and VO in HIGH/LOW states is rated −0.5 V to +7 V. This allows direct interfacing with 5 V buses without external level shifters, while operating from a 3.3 V supply (VCC = 2.7–3.6 V). Output drive remains ±32 mA even under 5 V bus conditions.
How does the bus-hold feature work on the 74LVT2952D,112?
The 74LVT2952D,112 integrates bus-hold circuitry on all data I/O pins (A0–A7, B0–B7), providing ±75 µA to ±150 µA weak hold current to maintain the last-valid logic state when inputs float. This eliminates the need for external pull-up/pull-down resistors on unused or undriven lines, reducing component count and PCB area-especially valuable in high-density backplane and modular I/O designs.
What is the purpose of separate OEAB and OEBA pins on the 74LVT2952D,112?
OEAB and OEBA provide independent 3-state control for the A→B and B→A data paths, respectively. This allows asymmetric bus control-for example, enabling only A→B outputs while keeping B→A outputs high-impedance during a write cycle, then reversing for a read. Such granular control prevents bus contention in full-duplex systems and supports complex arbitration protocols without external logic.
Is the 74LVT2952D,112 suitable for hot-swap applications?
Yes, the 74LVT2952D,112 supports live insertion/extraction per its datasheet features. Power-up 3-state ensures outputs remain high-impedance until VCC stabilizes, and bus-hold maintains valid logic states on floating inputs during partial power-up. Combined with latch-up immunity >500 mA and ESD protection >2000 V HBM, it is qualified for use in modular backplane and carrier-card systems requiring hot-swap capability.
74LVT2952D,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74LVT
- Package/Case:
- 24-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- 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
74LVT2952D,112 FAQ
1.How can I place an order for 74LVT2952D,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVT2952D,112 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 74LVT2952D,112 reliable?
The price and inventory of 74LVT2952D,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVT2952D,112 is usually 5 days.
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74LVT2952D,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVT2952D,112 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 74LVT2952D,112?
For technical support, including 74LVT2952D,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVT2952D,112 requirements.
6.How does Aetrix verify that 74LVT2952D,112 is sourced from the original manufacturer or authorized distributors?
All 74LVT2952D,112 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 74LVT2952D,112 meets industry standards.
7.What is the process for return or replacement of 74LVT2952D,112?
All 74LVT2952D,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVT2952D,112, 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 74LVT2952D,112 part is unused and in its original packaging.
Return procedure for 74LVT2952D,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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