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Nexperia USA Inc. 74LVT125BQ,115
- Part No.:
- 74LVT125BQ,115
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 14-VFQFN Exposed Pad
- Datasheet:
-
74LVT125BQ,115.pdf
- Description:
- IC BUF NON-INVERT 3.6V 14DHVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:934
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Product details
Overview
74LVT125BQ,115 from Nexperia is a 3.3 V quad non-inverting 3-state buffer with bus-hold inputs and IOFF partial power-down protection, operating from 2.7 V to 3.6 V supply, delivering ±32 mA/±64 mA output drive, and specified for -40 °C to +85 °C industrial temperature range - used in 3.3 V bus interface applications requiring high-speed level translation and hot-swap capability.
For engineers reviewing the 74LVT125BQ,115 datasheet, 74LVT125BQ,115 pinout, 74LVT125BQ,115 application, or 74LVT125BQ,115 equivalent, this device is selected for its overvoltage-tolerant 5.5 V inputs, sub-4 ns propagation delay at 3.3 V, and DHVQFN14 thermal-enhanced package enabling dense PCB layouts in industrial control backplanes and FPGA I/O expansion interfaces.
Technical Context
This BiCMOS buffer implements four independent non-inverting channels, each controlled by an active-low 3-state enable (nOE) input that forces high-impedance output when asserted. Bus-hold circuitry maintains valid logic states on unused inputs without external pull resistors, eliminating board-level component count and signal integrity risk.
The IOFF feature disables outputs during power-down, blocking reverse current flow when VCC = 0 V while inputs or outputs are biased up to 4.5 V - critical for live insertion, partial system shutdown, and mixed-voltage domain interconnects where 3.3 V logic drives 5 V buses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7 V to 3.6 V - supports wide-margin 3.3 V rail tolerance and compatibility with noisy industrial power supplies. |
| Propagation Delay | 2.7 ns typical (tPLH/tPHL @ VCC = 3.3 V) - enables >200 MHz bus operation with tight timing margins. |
| Output Drive | +64 mA sink / -32 mA source - drives heavy capacitive loads (e.g., 50 pF traces + multiple CMOS inputs) without signal degradation. |
| Input Voltage Range | 0 V to 5.5 V - allows direct interfacing with 5 V TTL, LVTTL, and mixed-voltage microcontrollers without level shifters. |
| IOFF Leakage | ±100 μA max @ VCC = 0 V - prevents damaging back-current during hot-plug or partial power-down sequences. |
| Bus Hold Current | ±75 μA to ±150 μA - actively retains logic state on floating inputs, eliminating need for 10 kΩ pull-up/down resistors. |
| Operating Temperature | -40 °C to +85 °C - qualified for industrial automation, telecom infrastructure, and embedded computing environments. |
Pinout & Package
DHVQFN14 (SOT762-1) package: 2.5 × 3.0 × 0.85 mm body, no leads, 14 exposed terminals, thermal pad (GND-connected), pin 1 index area marked on top surface.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | 1OE | Active-low enable for Buffer 1 - HIGH disables output (Z-state); LOW enables non-inverting pass-through of 1A→1Y. |
| 2 | 1A | Data input for Buffer 1 - accepts 0–5.5 V logic; bus-hold maintains last valid state if left unconnected. |
| 3 | 1Y | Buffered output for Buffer 1 - 3-state capable; sinks 64 mA or sources 32 mA into load. |
| 4 | 2OE | Active-low enable for Buffer 2 - independent control enables selective bus segment isolation. |
| 5 | 2A | Data input for Buffer 2 - electrically identical to 1A; supports asynchronous channel operation. |
| 6 | 2Y | Buffered output for Buffer 2 - shares same drive strength and timing specs as 1Y. |
| 7 | GND | Ground reference - also serves as thermal pad anchor; must be soldered to PCB ground plane for thermal performance. |
| 8 | 3Y | Buffered output for Buffer 3 - routed to terminal 8 per SOT762-1 pin map; matches 1Y/2Y electrical behavior. |
| 9 | 3A | Data input for Buffer 3 - includes bus-hold and 5.5 V overvoltage tolerance like all data inputs. |
| 10 | 3OE | Active-low enable for Buffer 3 - enables precise control of third bus segment during multi-drop arbitration. |
| 11 | 4Y | Buffered output for Buffer 4 - final output terminal; supports same high-speed switching and drive capability. |
| 12 | 4A | Data input for Buffer 4 - fully compliant with JEDEC JESD8C; compatible with TTL, LVTTL, and CMOS logic families. |
| 13 | 4OE | Active-low enable for Buffer 4 - allows full quad-channel disable via single control net or individual gating. |
| 14 | VCC | 3.3 V supply input - decoupling capacitor (100 nF) required within 5 mm for stable high-speed operation. |
Key Features
| Feature | Design Value |
|---|---|
| Quad 3-state buffer architecture | Four independent channels with individual OE control - enables flexible bus segmentation and multi-master arbitration in shared-data-path systems. |
| Bus-hold inputs | Eliminates external pull resistors on unused inputs - reduces BOM count, PCB area, and risk of floating-node noise coupling. |
| IOFF partial power-down | Blocks reverse current when VCC = 0 V and I/O pins biased to 4.5 V - essential for hot-swap backplane modules and modular PLC I/O cards. |
| Overvoltage-tolerant inputs | Withstands 5.5 V input voltage regardless of VCC - permits direct connection to legacy 5 V logic without level translators or clamping diodes. |
| BiCMOS process technology | Combines bipolar speed and CMOS low static power - achieves sub-4 ns propagation delay with <0.2 mA quiescent ICC at 3.3 V. |
Applications
| Industrial Backplane Interface | FPGA I/O Expansion |
|---|---|
|
Use Scenario: Interfacing a 3.3 V FPGA I/O bank to a legacy 5 V parallel control bus in programmable logic controllers. IC Role / Device Role / Timing Role: Level-translating buffer with 3-state control, isolating FPGA from bus contention during configuration or reset. Use Value: 5.5 V input tolerance eliminates external level shifters; bus-hold prevents glitches on unassigned address lines during partial reconfiguration. |
Use Scenario: Driving high-capacitance PCB traces (>50 pF) from FPGA GPIOs to external ADCs, DACs, and digital isolators. IC Role / Device Role / Timing Role: High-drive buffer providing clean edge integrity and fast tPLH/tPHL to meet setup/hold timing at >100 MHz sampling rates. Use Value: ±64 mA sink capability ensures reliable low-voltage transitions across long traces; sub-4 ns delay preserves timing margin in high-speed data capture paths. |
| Hot-Swappable Module Interface | Mixed-Voltage System Isolation |
|
Use Scenario: Enabling live insertion of I/O modules into powered industrial backplanes without disrupting host controller operation. IC Role / Device Role / Timing Role: IOFF-enabled buffer preventing backfeed current from module's 5 V bus into unpowered 3.3 V logic during insertion/removal. Use Value: IOFF leakage <±100 μA guarantees no damage or latch-up during hot-swap events; 3-state control allows safe initialization sequence before enabling data path. |
Use Scenario: Isolating 3.3 V microcontroller peripherals (SPI, UART) from 5 V sensor subsystems in automotive test equipment. IC Role / Device Role / Timing Role: Directional buffer with independent OE control, allowing bidirectional signal routing while maintaining voltage domain separation. Use Value: Independent 3-state enables software-controlled directionality; overvoltage-tolerant inputs prevent damage from 5 V transients on shared signal lines. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar quad 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74LVT125PW,118 | TSSOP14 package (4.4 mm width); 0.65 mm pitch; higher thermal resistance than DHVQFN14. | Suitable for manual assembly or lower-power density designs where thermal dissipation is less critical. | Select when board space allows larger footprint and hand-soldering is preferred over reflow-compatible QFN. |
| SN74LVC125APWR | Lower drive (±24 mA); 1.65–3.6 V supply; no IOFF or bus-hold; TI's LVC family. | Lacks partial power-down and bus-hold - requires external pull resistors and cannot support hot-swap. | Choose only for cost-sensitive, non-hot-swap, low-capacitance applications where 24 mA drive suffices. |
Compared with 74LVT125PW,118, the 74LVT125BQ,115 offers superior thermal performance and smaller footprint; versus SN74LVC125APWR, it delivers higher drive, IOFF safety, and bus-hold robustness - making it the sole choice for industrial hot-swap and mixed-voltage bus interfaces.
Availability
74LVT125BQ,115 is available at Aetrix Electronics and suitable for industrial backplane interfaces, FPGA I/O expansion, hot-swappable module interconnects, and mixed-voltage system isolation requiring stable component supply and long-term lifecycle assurance.
Supply support for 74LVT125BQ,115 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
Nexperia is a global semiconductor expert focused on high-performance, high-reliability standard logic, analog, and discrete components - serving automotive, industrial, and consumer markets with scalable manufacturing and rigorous quality systems.
The 74LVT series targets high-speed 3.3 V bus interface applications, emphasizing robustness in noisy industrial environments, hot-swap readiness, and seamless integration with legacy 5 V systems through overvoltage-tolerant I/O.
FAQ
Can 74LVT125BQ,115 operate with a 2.5 V supply?
No. The device is specified for 2.7 V to 3.6 V supply only. At 2.5 V, VIH minimum (2.0 V) and VOL maximum (0.55 V) are not guaranteed, and bus-hold functionality degrades below VCC = 2.7 V per Table 5 and Table 6. Operation outside recommended conditions risks timing violations and undefined output states.
Is the thermal pad on the DHVQFN14 package required to connect to GND?
Yes. The exposed thermal pad (terminal 7) must be soldered to a PCB GND plane for thermal dissipation and electrical stability. Per Figure 5, if soldered, it should remain floating or connected to GND - but grounding is strongly recommended to maintain junction temperature below 150 °C under 64 mA continuous output loading.
Does 74LVT125BQ,115 support true bidirectional data flow?
No. It is a unidirectional non-inverting buffer with separate input (nA) and output (nY) pins per channel. Bidirectional operation requires external control logic and additional components - this device provides only one-way signal amplification and 3-state isolation per channel.
What is the maximum capacitive load this buffer can drive reliably?
Per dynamic characteristics (Table 7) and test conditions (Figure 8), the device is characterized up to 50 pF load capacitance with 500 Ω termination. Driving >50 pF may increase propagation delay beyond 4.0 ns and degrade edge rate; for >75 pF loads, derating or adding series termination is advised to maintain signal integrity.
74LVT125BQ,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74LVT
- Package/Case:
- 14-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Buffer, Non-Inverting
- Number of Elements:
- 4
- Number of Bits per Element:
- 1
- 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:
- 14-DHVQFN (2.5x3)
74LVT125BQ,115 FAQ
1.How can I place an order for 74LVT125BQ,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVT125BQ,115 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 74LVT125BQ,115 reliable?
The price and inventory of 74LVT125BQ,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVT125BQ,115 is usually 5 days.
3.What payment methods are accepted for 74LVT125BQ,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVT125BQ,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVT125BQ,115?
74LVT125BQ,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVT125BQ,115 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 74LVT125BQ,115?
For technical support, including 74LVT125BQ,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVT125BQ,115 requirements.
6.How does Aetrix verify that 74LVT125BQ,115 is sourced from the original manufacturer or authorized distributors?
All 74LVT125BQ,115 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 74LVT125BQ,115 meets industry standards.
7.What is the process for return or replacement of 74LVT125BQ,115?
All 74LVT125BQ,115 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVT125BQ,115, 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 74LVT125BQ,115 part is unused and in its original packaging.
Return procedure for 74LVT125BQ,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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