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NXP Semiconductors 74LVC125AD,112
- Part No.:
- 74LVC125AD,112
- Manufacturer:
- NXP Semiconductors
- Package:
- 14-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
74LVC125AD,112.pdf
- Description:
- IC BUFFER NON-INVERT 3.6V 14SO
- Quantity:
- Payment:
- Shipping:
Inventory:76,250
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Product details
Overview
74LVC125AD,112 from Nexperia is a quad 3-state buffer/line driver with 5 V tolerant inputs and outputs, operating from 1.2 V to 3.6 V supply, featuring Schmitt-trigger inputs for noise immunity and IOFF partial power-down protection. It enables level translation between 3.3 V and 5 V systems in industrial I/O expansion, FPGA interface buffering, and mixed-voltage bus driving.
For engineers reviewing the 74LVC125AD,112 datasheet, 74LVC125AD,112 pinout, 74LVC125AD,112 application, or 74LVC125AD,112 equivalent, key selection criteria include 5.5 V input overvoltage tolerance, -40 °C to +125 °C operation, SO14 package compatibility, and guaranteed 3-state isolation during power sequencing.
Technical Context
This device implements four independent non-inverting buffers, each controlled by an active-low output enable (nOE) input. The IOFF circuit ensures high-impedance outputs when VCC = 0 V, preventing backflow current during partial power-down - critical for hot-swap and multi-rail system designs.
Schmitt-trigger inputs provide hysteresis (typ. 0.3 V at VCC = 3.3 V), enabling robust operation with slow-rising signals from microcontrollers or mechanical switches. All inputs tolerate up to 5.5 V regardless of VCC, allowing direct connection to legacy 5 V logic without external level shifters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage range | 1.2 V to 3.6 V - supports ultra-low-power IoT nodes and standard 3.3 V logic domains |
| Input voltage tolerance | Up to 5.5 V - enables direct interfacing with 5 V peripherals without external translators |
| Propagation delay (VCC = 3.3 V) | Typ. 2.5 ns - suitable for high-speed data routing in digital control and timing-critical interfaces |
| IOFF leakage (VCC = 0 V) | < ±10 μA - prevents damaging back-current during power sequencing or standby |
| Operating temperature | -40 °C to +125 °C - qualified for under-hood automotive modules and industrial motor drives |
| ESD rating (HBM) | > 2000 V - meets JEDEC JS-001 Class 2 for reliable handling in automated assembly |
| Output drive (VCC = 3.3 V) | ±24 mA - sufficient to drive 50 Ω transmission lines or multiple CMOS inputs |
Pinout & Package
74LVC125AD,112 uses the SO14 (SOT108-1) plastic small outline package: 14-pin, 3.9 mm body width, 1.27 mm pitch, gull-wing leads. Pin 1 index located at top-left corner with notch or dot marking.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 4, 10, 13 | nOE (active-low output enable) | Independent control per buffer; HIGH forces output into high-impedance state |
| 2, 5, 9, 12 | nA (data input) | Non-inverting input with Schmitt-trigger hysteresis for noise rejection |
| 3, 6, 8, 11 | nY (data output) | 3-state buffered output; driven LOW/HIGH or tri-stated based on nOE |
| 7 | GND | Reference ground for all logic and power domains; must be low-impedance |
| 14 | VCC | Single supply rail (1.2–3.6 V); powers internal logic and output drivers |
Key Features
| Feature | Design Value |
|---|---|
| 5 V tolerant inputs/outputs | Operates with 3.3 V supply while accepting 5 V signals - eliminates discrete level shifters in mixed-voltage buses |
| IOFF partial power-down | Outputs automatically enter high-Z when VCC = 0 V - prevents backfeed in hot-plug or multi-supply systems |
| Schmitt-trigger inputs | Hysteresis ≥ 0.3 V at VCC = 3.3 V - rejects noise on long traces or from mechanical switches |
| Wide temperature range | Specified from -40 °C to +125 °C - supports deployment in engine control units and industrial PLCs |
| Low dynamic power | CPD = 12.4 pF - minimizes switching current in battery-powered applications with frequent I/O toggling |
Applications
| Industrial I/O Expansion | FPGA Interface Buffering |
|---|---|
Use Scenario: Isolating and driving 3.3 V FPGA I/O banks to external 5 V sensors and actuators in programmable logic controllers. IC Role / Device Role / Timing Role: Quad buffer providing direction-controlled signal conditioning and voltage-level bridging between FPGA and field-side peripherals. Use Value: Eliminates need for four separate level translators; IOFF prevents latch-up during FPGA configuration reset sequences. |
Use Scenario: Driving high-capacitance PCB traces from FPGA GPIOs to ADC/DAC reference clocks and control lines. IC Role / Device Role / Timing Role: Low-skew (≤1.5 ns) buffer isolating FPGA outputs from trace loading and crosstalk. Use Value: Maintains signal integrity with 24 mA drive strength and sub-3 ns propagation delay across full temperature range. |
| Mixed-Voltage Bus Driving | Hot-Swap Peripheral Interface |
Use Scenario: Enabling communication between 3.3 V microcontroller and legacy 5 V UART peripherals in embedded gateways. IC Role / Device Role / Timing Role: Bidirectional voltage translator via 5 V tolerant inputs and 3.3 V compatible outputs. Use Value: Direct connection without pull-up resistors or external MOSFETs; Schmitt inputs reject EMI on noisy RS-232 lines. |
Use Scenario: Safely connecting add-on modules to powered-backplane systems where VCC may be sequenced independently. IC Role / Device Role / Timing Role: IOFF-enabled buffer ensuring no current flows into unpowered module rails during insertion. Use Value: Prevents damage to host controller during live insertion; meets IEC 61000-4-2 Level 3 ESD immunity. |
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 |
|---|---|---|---|
| SN74LVC125APWR | TSSOP14 package (SOT402-1); 4.4 mm body width; thermal resistance 130 K/W vs. SO14's 190 K/W | Better thermal performance in dense layouts; same electrical specs and pinout | Select for space-constrained PCBs requiring improved power dissipation at 50+ mW loads |
| 74LVC125ABQ,115 | DHVQFN14 package (SOT762-1); 2.5 × 3 mm footprint; exposed thermal pad; no leads | Superior thermal conductivity and board area reduction; requires solder paste stencil design | Select for high-reliability industrial modules needing enhanced thermal management and shock resistance |
Compared with SN74LVC125APWR and 74LVC125ABQ,115, the 74LVC125AD,112 offers lowest assembly cost and broadest legacy compatibility in SO14 sockets, while maintaining identical logic behavior and 5 V tolerance - ideal for cost-sensitive, volume-manufactured control boards.
Availability
74LVC125AD,112 is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and consumer appliance control systems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74LVC125AD,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 headquartered in Nijmegen, Netherlands, specializing in high-performance logic, analog, and discrete components for automotive, industrial, and consumer markets.
The 74LVC125A series belongs to Nexperia's LVC (Low-Voltage CMOS) logic family, engineered for interoperability across 1.2 V–5.5 V systems and designed specifically for robust mixed-voltage interface applications in harsh environments.
FAQ
Can 74LVC125AD,112 safely interface a 5 V sensor output to a 3.3 V microcontroller input?
Yes. Its inputs tolerate up to 5.5 V regardless of VCC voltage, so a 5 V sensor output can directly drive any nA input while VCC = 3.3 V. The output will swing between 0 V and 3.3 V, matching the microcontroller's input thresholds. No external resistors or clamps are required.
Does 74LVC125AD,112 support hot-swap insertion when only the peripheral side is powered?
Yes. The IOFF circuit activates when VCC = 0 V, forcing all outputs into high-impedance mode and limiting backflow current to < ±10 μA - protecting both the unpowered IC and the live 5 V bus. This meets IEC 61000-4-2 Level 3 ESD requirements for hot-plug systems.
What is the maximum capacitive load this device can drive at 3.3 V supply?
At VCC = 3.3 V and Tamb = 25 °C, it can drive up to 50 pF with guaranteed 6.0 ns max propagation delay (per Table 7). For heavier loads (>50 pF), derate timing margins using CPD = 12.4 pF and the formula PD = CPD × VCC² × fi × N to ensure thermal limits (500 mW for SO14) are not exceeded.
Is the SO14 package (SOT108-1) RoHS-compliant and lead-free?
Yes. 74LVC125AD,112 conforms to RoHS Directive 2011/65/EU and is manufactured with 100 % matte tin lead finish. The SOT108-1 package uses halogen-free molding compound and meets JEDEC J-STD-020 moisture sensitivity level 1 (MSL-1), allowing unlimited floor life at ≤30 °C/60 % RH.
74LVC125AD,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74LVC
- 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:
- 24mA, 24mA
- Voltage - Supply:
- 1.2V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 14-SO
74LVC125AD,112 FAQ
1.How can I place an order for 74LVC125AD,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVC125AD,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 74LVC125AD,112 reliable?
The price and inventory of 74LVC125AD,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVC125AD,112 is usually 5 days.
3.What payment methods are accepted for 74LVC125AD,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVC125AD,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVC125AD,112?
74LVC125AD,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVC125AD,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 74LVC125AD,112?
For technical support, including 74LVC125AD,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVC125AD,112 requirements.
6.How does Aetrix verify that 74LVC125AD,112 is sourced from the original manufacturer or authorized distributors?
All 74LVC125AD,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 74LVC125AD,112 meets industry standards.
7.What is the process for return or replacement of 74LVC125AD,112?
All 74LVC125AD,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVC125AD,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 74LVC125AD,112 part is unused and in its original packaging.
Return procedure for 74LVC125AD,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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