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NXP Semiconductors 74LVT652DB,112
- Part No.:
- 74LVT652DB,112
- Manufacturer:
- NXP Semiconductors
- Package:
- 24-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74LVT652DB,112.pdf
- Description:
- IC TXRX NON-INVERT 3.6V 24SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,084
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Product details
Overview
74LVT652DB,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 drive capability, and operates across –40°C to +85°C. Used in mixed-voltage backplane interfaces where 3.3V logic must interoperate with legacy 5V systems.
For engineers reviewing the 74LVT652DB,112 datasheet, 74LVT652DB,112 pinout, 74LVT652DB,112 application, or 74LVT652DB,112 equivalent, key selection criteria include its dual-clock register architecture, 2.6 ns typical propagation delay (An→Bn), 3.3V supply with 5V-tolerant I/O, and SSOP-24 package compatibility for high-density board layouts.
Technical Context
The 74LVT652DB,112 implements a BiCMOS-based octal transceiver with integrated D-type flip-flops on both A and B sides, enabling simultaneous storage and multiplexed output of real-time or latched data. Its CPAB/CPBA clock inputs control independent register loading, while SAB/SBA select pins determine whether data flows directly or from internal registers.
Control logic supports four distinct bus-management modes: real-time A↔B transfer, storage from either bus, and output of stored data to either bus. OEAB (active-High) and OEBA (active-Low) provide asymmetric 3-State enable control per direction, and bus-hold circuitry eliminates external pull-ups on unused inputs.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | VCC = 2.7V to 3.6V - Enables stable operation in modern low-voltage systems while maintaining backward compatibility with 3.3V rails. |
| Propagation Delay | tPLH/tPHL = 2.6 ns (An→Bn, CL = 50pF) - Supports >150 MHz clock frequencies in high-speed data paths. |
| Output Drive | +64mA / –32mA - Drives heavy capacitive loads or multiple TTL inputs without external buffers. |
| I/O Voltage Tolerance | VI up to 5.5V - Allows direct connection to 5V buses without level shifters in mixed-supply systems. |
| Input Capacitance | CIN = 4 pF - Minimizes signal loading on upstream drivers, preserving edge integrity in dense routing. |
| Bus-Hold Current | IHOLD = ±75 µA at VCC = 3V - Actively holds floating inputs at valid logic levels, eliminating need for discrete pull resistors. |
| Quiescent Supply Current | ICCZ = 0.13 mA (outputs disabled) - Reduces standby power in always-on subsystems like hot-swap controllers. |
Pinout & Package
74LVT652DB,112 is housed in a 24-pin plastic shrink small outline package (SSOP), body width 5.3 mm (SOT340-1), suitable for automated assembly and space-constrained applications.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| VCC (Pin 24) | Positive supply voltage | 3.3V nominal rail; decoupling required within 10 mm for noise immunity. |
| GND (Pin 12) | Ground reference | Common return path for all I/O and core logic; must be low-inductance connection. |
| CPAB / CPBA (Pins 1, 23) | A→B and B→A clock inputs | Edge-triggered clocks load data into respective registers on Low-to-High transition. |
| SAB / SBA (Pins 2, 22) | A→B and B→A select inputs | Control multiplexing: High selects stored data; Low enables real-time pass-through mode. |
| OEAB / OEBA (Pins 3, 21) | A→B and B→A output enables | OEAB active-High enables A→B outputs; OEBA active-Low enables B→A outputs - supports asymmetric control. |
| A0–A7 (Pins 4–11) | Data I/O (A side) | Bidirectional interface pins with bus-hold; function as inputs when OEAB = L and OEBA = H. |
| B0–B7 (Pins 13–20) | Data I/O (B side) | Bidirectional interface pins with bus-hold; function as inputs when OEBA = L and OEAB = H. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent register banks | Enables concurrent capture of A- and B-side data for time-stamped buffering or arbitration logic. |
| Multiplexed real-time/stored data output | Allows dynamic switching between live bus monitoring and previously captured snapshots without external logic. |
| 5V-tolerant I/O with TTL thresholds | Interoperates with legacy 5V microcontrollers and FPGAs while powered from 3.3V, reducing system-level voltage translation. |
| Live insertion/extraction support | Permits hot-plug operation in modular backplanes or field-replaceable units without disrupting adjacent circuitry. |
| Power-up 3-State and reset | Guarantees high-impedance outputs during power ramp-up, preventing bus contention in multi-device systems. |
Applications
| Backplane Interface | Hot-Swap Module Control |
|---|---|
Use Scenario: Interfacing a 3.3V FPGA-based processing module to a legacy 5V VMEbus backplane. IC Role / Device Role / Timing Role: Bidirectional transceiver and data register managing address/data strobes with timing isolation between domains. Use Value: Eliminates need for discrete level shifters and external latches while supporting real-time or buffered transfers based on control signals. |
Use Scenario: Managing communication between a hot-pluggable I/O card and a fixed motherboard controller. IC Role / Device Role / Timing Role: Bus isolator and state-holding register ensuring clean insertion/removal handshake and data retention during reconfiguration. Use Value: Bus-hold inputs prevent floating states during partial insertion; power-up 3-State avoids glitches on shared bus lines. |
| Multi-Processor Data Arbitration | Legacy System Upgrade Bridge |
Use Scenario: Coordinating data exchange between two 3.3V microcontrollers sharing a common memory-mapped peripheral bus. IC Role / Device Role / Timing Role: Registered transceiver providing synchronized handshaking and temporary data staging to resolve timing mismatches. Use Value: Independent CPAB/CPBA clocks allow each processor to latch data asynchronously, avoiding race conditions in shared resource access. |
Use Scenario: Upgrading a 5V industrial PLC CPU while retaining existing 5V I/O modules. IC Role / Device Role / Timing Role: Voltage-compatible interface buffer enabling new 3.3V logic to drive and read legacy 5V peripherals without redesign. Use Value: 5V-tolerant inputs accept legacy signals directly; ±64mA drive ensures reliable signaling into older TTL loads. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal transceiver/register applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVT652DBR | TI version in same SSOP-24 package; identical pinout and AC specs, but slightly higher ICCZ (0.2 mA typical) and no documented bus-hold current spec. | Valid drop-in replacement where bus-hold strength is not critical; requires verification of input leakage under 5V bias. | Select when sourcing from TI-authorized channels; confirm layout compatibility via TI's SOT340-1 footprint. |
| 74ALVT652D,112 | NXP ALVT variant with faster tPLH (1.8 ns typ), lower ICCZ (0.08 mA), but reduced output drive (+32mA/–16mA) and no bus-hold feature. | Better for ultra-low-power, high-speed point-to-point links; unsuitable for unterminated or high-capacitance buses requiring strong drive. | Choose for timing-critical paths where power budget is tighter and external pull-ups can be added if needed. |
Compared with SN74LVT652DBR and 74ALVT652D,112, the 74LVT652DB,112 uniquely balances robust 5V-tolerant I/O, bus-hold functionality, and moderate power consumption-making it optimal for mixed-voltage backplane and upgrade bridge designs where reliability and design simplicity are prioritized over peak speed or minimal quiescent current.
Availability
74LVT652DB,112 is available at Aetrix Electronics and suitable for backplane interfaces, hot-swap module control, multi-processor arbitration, legacy system upgrade bridges, and industrial PLC retrofitting requiring stable component supply and long-term lifecycle support.
Supply support for 74LVT652DB,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 leader focused on secure connectivity solutions for automotive, industrial, and IoT applications, with roots in Philips' pioneering logic and analog portfolio.
The 74LVT652DB,112 belongs to NXP's LVT (Low-Voltage Technology) logic family, designed specifically to bridge 3.3V and 5V systems with high-speed, low-power, and robust mixed-voltage interoperability.
FAQ
What is the maximum clock frequency supported by the 74LVT652DB,112?
The 74LVT652DB,112 supports a maximum clock frequency of 150 MHz at VCC = 3.3V ± 0.3V over the full operating temperature range (–40°C to +85°C), as specified in the AC Characteristics table. This rating assumes CL = 50pF and proper signal integrity practices including controlled impedance routing and local decoupling.
Does the 74LVT652DB,112 require external pull-up resistors on unused inputs?
No, the 74LVT652DB,112 does not require external pull-up resistors on unused inputs because it integrates bus-hold circuitry on all A-side data pins (A0–A7). This feature actively maintains the last-valid logic state with ±75 µA overdrive current, eliminating floating inputs and simplifying PCB design.
Can the 74LVT652DB,112 safely interface with a 5V microcontroller?
Yes, the 74LVT652DB,112 can safely interface with a 5V microcontroller: its inputs tolerate up to 5.5V regardless of VCC, and its outputs swing to VOH ≥ 2.4V (at IOH = –8mA) and VOL ≤ 0.5V (at IOL = 64mA), meeting TTL logic thresholds expected by 5V devices.
What is the function of the SAB and SBA pins on the 74LVT652DB,112?
The SAB (Pin 2) and SBA (Pin 22) pins on the 74LVT652DB,112 are select inputs that determine whether data appears at the outputs in real time (SAB/SBA = Low) or from the internal registers (SAB/SBA = High). They enable flexible bus management modes including live pass-through, stored-data output, and hybrid configurations.
Is the 74LVT652DB,112 pin-compatible with other packages of the same part number?
Yes, the 74LVT652DB,112 shares identical pinout and electrical functionality with other package variants of the 74LVT652 family-including the SO24 (74LVT652D) and TSSOP24 (74LVT652PW)-as confirmed by Philips' ordering information and pin configuration diagrams. All variants use the same SOT-numbered footprints (SOT137-1, SOT340-1, SOT355-1) with consistent pin numbering and signal mapping.
74LVT652DB,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74LVT
- Package/Case:
- 24-SSOP (0.209", 5.30mm 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-SSOP
74LVT652DB,112 FAQ
1.How can I place an order for 74LVT652DB,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVT652DB,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 74LVT652DB,112 reliable?
The price and inventory of 74LVT652DB,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVT652DB,112 is usually 5 days.
3.What payment methods are accepted for 74LVT652DB,112?
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4.How is shipping managed for 74LVT652DB,112?
74LVT652DB,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVT652DB,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 74LVT652DB,112?
For technical support, including 74LVT652DB,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVT652DB,112 requirements.
6.How does Aetrix verify that 74LVT652DB,112 is sourced from the original manufacturer or authorized distributors?
All 74LVT652DB,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 74LVT652DB,112 meets industry standards.
7.What is the process for return or replacement of 74LVT652DB,112?
All 74LVT652DB,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVT652DB,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 74LVT652DB,112 part is unused and in its original packaging.
Return procedure for 74LVT652DB,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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