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NXP Semiconductors 74LVT125D,112
- Part No.:
- 74LVT125D,112
- Manufacturer:
- NXP Semiconductors
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
74LVT125D,112.pdf
- Description:
- IC BUFFER NON-INVERT 3.6V 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:41,664
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Product details
Overview
74LVT125D,112 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. It enables bidirectional bus interfacing in high-speed digital systems such as backplane data routing and memory address latching.
For engineers reviewing the 74LVT125D,112 datasheet, 74LVT125D,112 pinout, 74LVT125D,112 application, or 74LVT125D,112 equivalent, key selection criteria include 3-state timing (tPZH ≤ 4.7 ns), overvoltage-tolerant 5.5 V inputs, bus-hold current (IBHL = 75–150 μA), and SO14 package compatibility with legacy 74-series footprints.
Technical Context
This BiCMOS device implements four independent non-inverting buffers, each controlled by an active-low 3-state enable input (nOE). Each channel features bus-hold circuitry that maintains logic state on unused inputs without external pull-ups, eliminating floating node risks.
The IOFF functionality disables outputs during power-down, blocking backflow current when VCC = 0 V while inputs/outputs remain at up to 4.5 V - critical for hot-swap and partial-power-down system architectures. Input tolerance to 5.5 V allows direct interfacing with 5 V TTL logic without level-shifting.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 2.7 V to 3.6 V - ensures stable operation across noisy 3.3 V rails and accommodates ±5% regulation tolerance. |
| Input voltage range | 0 V to 5.5 V - enables direct connection to 5 V TTL buses without clamping diodes or external protection. |
| Output drive | +64 mA sink / -32 mA source - supports driving 50 Ω transmission lines or multiple CMOS/TTL loads simultaneously. |
| Propagation delay | tPLH/tPHL ≤ 4.0 ns @ 3.3 V - meets sub-5 ns timing budgets for 100+ MHz bus clocking in FPGA I/O expansion. |
| Bus-hold current | IBHL = 75–150 μA @ 0.8 V - actively holds unconnected inputs at valid LOW without external resistors, reducing BOM count. |
| IOFF leakage | ≤ ±100 μA @ VCC = 0 V - prevents damaging back-current during live insertion or staggered power sequencing. |
| Operating temperature | -40 °C to +85 °C - qualified for industrial control, telecom infrastructure, and embedded computing environments. |
Pinout & Package
74LVT125D,112 is supplied in SO14 (SOT108-1) plastic small outline package: 14-pin, 3.9 mm body width, 1.27 mm pitch, gull-wing leads, JEDEC MS-012 compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | nOE (active LOW) | Independent 3-state enable per buffer; HIGH forces output into high-impedance OFF-state. |
| 2, 5, 9, 12 | nA (data input) | Buffer input with bus-hold; retains last valid logic state when left unconnected. |
| 3, 6, 8, 11 | nY (data output) | Non-inverting buffered output; supports 5 V tolerant operation in 3-state or driven modes. |
| 7 | GND | Ground reference for all internal circuitry and I/O; must be connected to system 0 V plane. |
| 14 | VCC | Primary supply rail; powers internal BiCMOS logic and output drivers; bypass capacitor required. |
Key Features
| Feature | Design Value |
|---|---|
| Quad 3-state buffer architecture | Four independent channels with individual OE control enable flexible bus arbitration and multi-drop signal routing. |
| Bus-hold inputs | Eliminates need for 10 kΩ pull-up/down resistors on unused inputs, reducing PCB area and assembly cost. |
| IOFF partial power-down | Prevents destructive back-current flow when VCC = 0 V but I/O pins remain biased - essential for hot-plug systems. |
| 5.5 V overvoltage-tolerant inputs | Allows seamless interface with legacy 5 V TTL logic without external level translators or voltage dividers. |
| Live insertion/extraction support | Guaranteed safe operation during board insertion/removal under power due to IOFF and ESD robustness (HBM > 2000 V). |
Applications
| Backplane Data Bus Interface | FPGA I/O Expansion |
|---|---|
|
Use Scenario: Isolating and driving parallel address/data lines between CPU and peripheral cards in modular rack systems. IC Role / Device Role / Timing Role: Quad buffer provides direction-controlled, 3-state isolation between shared bus segments with <4.0 ns propagation delay. Use Value: Enables clean signal integrity across 15 cm traces at 100 MHz while preventing contention via per-channel OE control. |
Use Scenario: Extending FPGA GPIO count to drive off-board peripherals like ADCs, DACs, or display controllers. IC Role / Device Role / Timing Role: Level-translating buffer interfaces 3.3 V FPGA I/O to 5 V legacy peripherals with 5.5 V-tolerant inputs. Use Value: Eliminates discrete level shifters and reduces FPGA pin utilization by consolidating four signals per IC. |
| Industrial PLC I/O Module | Memory Address Latching |
|
Use Scenario: Driving opto-isolated input/output channels in programmable logic controller modules with mixed-voltage sensors. IC Role / Device Role / Timing Role: Bus-hold inputs maintain defined states on unterminated sensor lines; IOFF protects during firmware updates. Use Value: Reduces field failures caused by floating inputs and enables safe in-system reprogramming without power cycling. |
Use Scenario: Latching 16-bit address bus from microcontroller to external SRAM or flash memory in embedded systems. IC Role / Device Role / Timing Role: Non-inverting buffer isolates MCU address pins from memory load; 3-state allows shared bus access. Use Value: Ensures setup/hold timing margins are met with tPZH ≤ 4.7 ns, supporting 25 MHz memory access cycles. |
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); identical electrical specs and pinout. | Better thermal performance and higher density layout; requires finer-pitch soldering process. | Select for space-constrained PCBs where SO14 footprint is unavailable or thermal dissipation is critical. |
| SN74LVC125APWR | Lower drive (±24 mA), 1.65–3.6 V supply, no bus-hold; TI part in TSSOP14. | Lacks bus-hold and IOFF; requires external pull resistors and cannot safely operate in partial power-down. | Choose only if cost is primary concern and system lacks hot-swap or floating-input requirements. |
Compared with 74LVT125D,112, the 74LVT125PW,118 offers identical functionality in a smaller footprint but demands tighter assembly tolerances, while SN74LVC125APWR sacrifices bus-hold and IOFF for lower cost and wider supply range - making it unsuitable for industrial hot-swap or floating-bus designs.
Availability
74LVT125D,112 is available at Aetrix Electronics and suitable for industrial PLC I/O modules, FPGA-based test equipment, and telecom backplane interconnects requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for 74LVT125D,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
Nexperia is a global semiconductor expert specializing in high-performance, reliable standard logic, analog, and MOSFET solutions for automotive, industrial, and consumer markets.
The 74LVT series delivers high-speed BiCMOS logic with enhanced drive strength and robustness for demanding 3.3 V digital interfaces - designed specifically for industrial backplanes, FPGA I/O expansion, and mixed-voltage system bridging.
FAQ
Can 74LVT125D,112 safely interface with 5 V logic without level shifters?
Yes. Its inputs tolerate up to 5.5 V regardless of VCC, enabling direct connection to 5 V TTL outputs. The output high-level voltage (VOH ≥ 2.0 V @ 3.0 V VCC, -32 mA) meets TTL input thresholds, and its 3-state outputs are 5 V tolerant - eliminating need for external translators in mixed-voltage bus systems.
What is the purpose of the bus-hold feature, and how does it affect design?
The bus-hold circuit actively maintains the last valid logic state on unconnected inputs using ~100 μA feedback current, preventing floating nodes and associated noise susceptibility. This eliminates mandatory external pull-up/pull-down resistors, reducing component count, PCB area, and potential signal integrity issues from resistor parasitics.
How does IOFF protect the device during partial power-down?
When VCC = 0 V, the IOFF circuit disables all outputs and blocks current flow between powered I/O pins and the unpowered VCC rail. Measured IOFF leakage is ≤ ±100 μA even with pins biased to 4.5 V, preventing destructive back-current that could damage the IC or destabilize upstream supplies during hot-swap or staggered power sequencing.
Is 74LVT125D,112 pin-compatible with older 74-series buffers like 74LS125?
No. While functionally similar (quad 3-state non-inverting buffer), 74LVT125D,112 uses SO14 pinout matching industry-standard 74LVT/74LVTH families - not the legacy 74LS125 pinout. Pin 1 is 1OE (not 1A), and GND is pin 7 (not pin 8). Direct replacement requires PCB layout revision or adapter.
74LVT125D,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74LVT
- Package/Case:
- 14-SOIC (0.154", 3.90mm Width)
- Packaging:
- Bulk
- 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-SO
74LVT125D,112 FAQ
1.How can I place an order for 74LVT125D,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVT125D,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 74LVT125D,112 reliable?
The price and inventory of 74LVT125D,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVT125D,112 is usually 5 days.
3.What payment methods are accepted for 74LVT125D,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVT125D,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVT125D,112?
74LVT125D,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVT125D,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 74LVT125D,112?
For technical support, including 74LVT125D,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVT125D,112 requirements.
6.How does Aetrix verify that 74LVT125D,112 is sourced from the original manufacturer or authorized distributors?
All 74LVT125D,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 74LVT125D,112 meets industry standards.
7.What is the process for return or replacement of 74LVT125D,112?
All 74LVT125D,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVT125D,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 74LVT125D,112 part is unused and in its original packaging.
Return procedure for 74LVT125D,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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