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NXP Semiconductors 74LVT652D,112
- Part No.:
- 74LVT652D,112
- Manufacturer:
- NXP Semiconductors
- Package:
- 24-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74LVT652D,112.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 24SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,033
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Product details
Overview
74LVT652D,112 from NXP Semiconductors (formerly Philips) is a 3.3V octal transceiver/register with non-inverting 3-State outputs, supporting bidirectional real-time or registered data transfer between A and B buses. It features independent A/B registers, bus-hold inputs, ±64mA/–32mA output drive, and operates from –40°C to +85°C in a 24-pin SO package. Used in 3.3V/5V mixed-voltage backplane and memory interface systems.
For engineers reviewing the 74LVT652D,112 datasheet, 74LVT652D,112 pinout, 74LVT652D,112 application, or 74LVT652D,112 equivalent, key selection criteria include clock-controlled register storage, dual-direction 3-State bus management, TTL-level compatibility with 5V systems, and bus-hold functionality eliminating external pull-ups.
Technical Context
The 74LVT652D,112 integrates eight D-type flip-flops per bus side with separate clock (CPAB/CPBA), select (SAB/SBA), and output-enable (OEAB/OEBA) controls-enabling simultaneous or staggered loading of A and B register banks. Its BiCMOS process delivers 2.6 ns typical propagation delay (An↔Bn) at 3.3V with 50 pF load.
It supports four distinct operational modes: real-time A→B or B→A transfer, storage from either bus, and retrieval of stored data to either bus. Input voltage tolerance up to 5.5V and output clamp protection allow safe interfacing with legacy 5V logic without level shifters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Supply | 2.7V to 3.6V - Enables stable operation in modern low-voltage digital systems while maintaining backward compatibility with 3.3V infrastructure. |
| tPLH / tPHL | 2.8 / 2.6 ns (An↔Bn) - Supports high-speed data routing in memory buffers and FPGA I/O expansion paths up to 150 MHz clock rate. |
| IOH / IOL | –32 mA / +64 mA - Drives heavy capacitive loads (e.g., long PCB traces or multiple CMOS inputs) without signal degradation or timing skew. |
| VIH / VIL | 2.0 V / 0.8 V - Fully compatible with TTL input thresholds, enabling direct connection to 5V logic families without translation circuitry. |
| CIN / CI/O | 4 pF / 10 pF - Minimizes capacitive loading on upstream drivers and reduces switching noise during high-frequency bus toggling. |
| ICCZ Quiescent Current | 0.13 mA (outputs disabled) - Reduces standby power in always-on control modules and hot-swap-capable backplanes. |
| Bus-Hold Current | ±75 µA (IHOLD) - Maintains valid logic state on floating A-side inputs, eliminating need for external pull-up resistors and saving board space. |
Pinout & Package
74LVT652D,112 is housed in a 24-pin plastic Small Outline (SO) package per SOT137-1, 7.5 mm body width, surface-mount compatible with standard reflow profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 23 | CPAB / CPBA | A→B or B→A clock input - Rising-edge triggered register load control; enables synchronous capture of live bus data into respective flip-flop banks. |
| 2, 22 | SAB / SBA | A→B or B→A select input - Determines whether output reflects real-time bus value (S = L) or registered value (S = H). |
| 3, 21 | OEAB / OEBA | A→B Output Enable (active-High) / B→A Output Enable (active-Low) - Independent 3-State control per direction for flexible bus arbitration. |
| 4–11 | A0–A7 | A-side bidirectional I/O - Connects to local processor/data bus; includes bus-hold on all A inputs to prevent floating states. |
| 13–20 | B0–B7 | B-side bidirectional I/O - Interfaces with peripheral or memory bus; driven by internal registers or passed through transparently. |
| 12 | GND | Ground reference - Shared return path for all logic and output current; requires low-impedance PCB plane for noise immunity. |
| 24 | VCC | +3.3V supply - Powers internal BiCMOS logic; decoupling capacitor (0.1 µF) required within 10 mm of pin for stable high-speed operation. |
Key Features
| Feature | Design Value |
|---|---|
| Independent A/B register banks | Enables concurrent storage of two 8-bit data sets - critical for ping-pong buffering in DMA controllers and protocol converters. |
| Multiplexed real-time/stored data output | Select pins (SAB/SBA) dynamically switch between live bus pass-through and registered output - simplifies glue logic in FPGA-to-ASIC bridging. |
| Bus-hold on A-side inputs | Eliminates external pull-up resistors for unused A inputs - reduces BOM count, layout complexity, and risk of signal integrity issues in high-density boards. |
| Live insertion/extraction support | Power-up 3-State and latch-up protection (>500 mA) allow safe hot-plug operation in modular backplanes and telecom line cards. |
| 5V-tolerant I/O | Inputs accept up to 5.5V; outputs drive 5V buses with no current loading - enables seamless integration into mixed-voltage systems without level translators. |
Applications
| Memory Interface Buffer | FPGA I/O Expansion |
|---|---|
|
Use Scenario: Interfacing a 3.3V microcontroller to a 5V SRAM bank with address/data multiplexing and timing-critical strobes. IC Role / Device Role / Timing Role: Acts as registered transceiver - stores address latches on CPAB edge, then drives SRAM bus under OEAB control with sub-3ns propagation delay. Use Value: Eliminates discrete latch + buffer ICs; bus-hold prevents address glitches during reset; 5V-tolerant inputs avoid level-shifter components. |
Use Scenario: Extending I/O count of a Spartan-6 FPGA to drive legacy parallel peripherals (e.g., LCD controller, ISA-style device). IC Role / Device Role / Timing Role: Provides registered, direction-controlled 8-bit data path between FPGA GPIO and peripheral bus - synchronized to FPGA clock domain via CPAB/CPBA. Use Value: Offloads timing-critical bus arbitration from FPGA fabric; 3-State outputs enable shared-bus topology; ±64mA drive supports long trace runs. |
| Hot-Swappable Backplane Module | Mixed-Voltage System Bridge |
|
Use Scenario: Slot-based telecom card requiring safe insertion/removal while main backplane remains powered at 5V. IC Role / Device Role / Timing Role: Isolates module's 3.3V logic from backplane via 3-State control; power-up 3-State prevents bus contention during insertion. Use Value: Meets Telcordia GR-1089 ESD/latch-up requirements; live insertion capability certified per JEDEC Std 17; no external protection needed. |
Use Scenario: Connecting a 3.3V ARM SoC to a 5V industrial sensor bus with bidirectional command/response traffic. IC Role / Device Role / Timing Role: Bidirectional voltage-agnostic transceiver - accepts 5V sensor signals on A-side, presents clean 3.3V levels to SoC on B-side, and vice versa. Use Value: Removes need for dual-supply level shifters; TTL-compatible thresholds ensure reliable detection of 5V logic edges; bus-hold stabilizes idle sensor lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal transceiver/register applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC8T245RHLR | 3.3V-only I/O (no 5V tolerance); lower drive (±24mA); no bus-hold; uses single-direction OE and DIR pins instead of dual OEAB/OEBA. | Requires external pull-ups on unused inputs; unsuitable for direct 5V bus connection without level shifters; simpler control logic but less flexible bus arbitration. | Choose when cost and footprint are prioritized over 5V interoperability and robustness in mixed-voltage environments. |
| 74ALVT162245DGG | 16-bit version; higher speed (tPD = 2.2 ns); same 3.3V supply and 5V-tolerant I/O; includes power-down mode (ICCZ = 0.02 mA). | Provides double data width for wider buses; better suited for high-throughput interconnects like PCI-X add-in cards; larger TSSOP48 package increases layout area. | Choose when system requires 16-bit data paths or ultra-low quiescent current in standby, accepting larger package and higher unit cost. |
Compared with SN74LVC8T245RHLR and 74ALVT162245DGG, the 74LVT652D,112 uniquely combines dual-register architecture, bus-hold, and full 5V-tolerant I/O in a compact 24-pin SO package - making it optimal for space-constrained, mixed-voltage designs requiring deterministic storage and real-time multiplexing.
Availability
74LVT652D,112 is available at Aetrix Electronics and suitable for memory interface buffers, FPGA I/O expansion, hot-swappable backplane modules, and mixed-voltage system bridges requiring stable component supply across industrial temperature ranges.
Supply support for 74LVT652D,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, formerly Philips Semiconductors, is a global leader in high-performance analog and logic ICs, with core expertise in automotive, industrial, and communication semiconductor solutions.
The 74LVT652D,112 belongs to NXP's LVT (Low-Voltage TTL) logic family, engineered specifically for 3.3V systems needing seamless interoperability with legacy 5V infrastructure and robust operation in demanding industrial environments.
FAQ
What is the maximum clock frequency supported by the 74LVT652D,112?
The 74LVT652D,112 supports a maximum clock frequency of 150 MHz at VCC = 3.3V and Tamb = –40°C to +85°C. This rating is validated under AC test conditions with CL = 50 pF and RL = 500 Ω. At 2.7V supply, the max frequency drops to 120 MHz. The 74LVT652D,112 achieves this performance using BiCMOS technology to balance speed and power efficiency.
Does the 74LVT652D,112 require external pull-up resistors on its A-side inputs?
No, the 74LVT652D,112 includes integrated bus-hold circuitry on all A0–A7 inputs, providing ±75 µA overdrive current to maintain valid logic states on floating lines. This eliminates the need for external pull-up resistors in unconnected or undriven configurations, reducing BOM cost and PCB area. The 74LVT652D,112 bus-hold feature is active at all valid supply voltages from 2.7V to 3.6V.
Can the 74LVT652D,112 safely interface with a 5V bus without level-shifting components?
Yes, the 74LVT652D,112 supports 5V-tolerant inputs (VI up to 5.5V) and can drive 5V buses directly due to its output structure and clamp protection. Its outputs deliver +64mA sink and –32mA source capability into 5V loads without damage or signal distortion. This capability is confirmed in the Absolute Maximum Ratings and DC Electrical Characteristics sections of the official 74LVT652D,112 datasheet.
What happens to the outputs of the 74LVT652D,112 during power-up?
During power-up, the 74LVT652D,112 enters a defined 3-State (high-impedance) condition before VCC reaches 1.2V, preventing bus contention. Once VCC exceeds 1.2V, outputs remain in 3-State until valid control signals are applied. This behavior is guaranteed by the Power-up 3-State and Power-up Reset features documented in the 74LVT652D,112 product specification.
How does the 74LVT652D,112 handle simultaneous data storage on both A and B buses?
The 74LVT652D,112 allows simultaneous storage from both buses only when both SAB and SBA are Low - enabling concurrent clocking of A and B data into their respective registers on rising CPAB and CPBA edges. If either SAB or SBA is High, clocks must be staggered to avoid metastability. This dual-register independence is explicitly defined in the Function Table and Real-Time Bus Transfer examples of the 74LVT652D,112 datasheet.
74LVT652D,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
74LVT652D,112 FAQ
1.How can I place an order for 74LVT652D,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVT652D,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 74LVT652D,112 reliable?
The price and inventory of 74LVT652D,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVT652D,112 is usually 5 days.
3.What payment methods are accepted for 74LVT652D,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVT652D,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVT652D,112?
74LVT652D,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVT652D,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 74LVT652D,112?
For technical support, including 74LVT652D,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVT652D,112 requirements.
6.How does Aetrix verify that 74LVT652D,112 is sourced from the original manufacturer or authorized distributors?
All 74LVT652D,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 74LVT652D,112 meets industry standards.
7.What is the process for return or replacement of 74LVT652D,112?
All 74LVT652D,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVT652D,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 74LVT652D,112 part is unused and in its original packaging.
Return procedure for 74LVT652D,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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