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Home > Products > Integrated Circuits (ICs) > Logic > Buffers, Drivers, Receivers, Transceivers

Nexperia USA Inc. 74VHC125D,118

Name: 74VHC125D,118
Brand: Nexperia USA Inc.
SKU: 74VHC125D,118
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74VHC125D,118

Manufacturer:: Nexperia USA Inc.

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 14-SOIC (0.154", 3.90mm Width)

Datasheet:: 74VHC125D,118.pdf

Description:: IC BUFFER NON-INVERT 5.5V 14SO

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Product details

Overview

74VHC125D,118 from Nexperia is a quad non-inverting 3-state buffer/line driver in SO14 package, operating at 2.0–5.5 V supply, with propagation delay as low as 3.0 ns (VCC = 5 V, CL = 15 pF), ±25 mA output drive, and Schmitt-trigger inputs for noise immunity. It serves as a level-shifting bus interface in digital logic systems requiring controlled signal routing and bus contention prevention.

For engineers reviewing the 74VHC125D,118 datasheet, 74VHC125D,118 pinout, 74VHC125D,118 application, or 74VHC125D,118 equivalent, key selection factors include TTL/CMOS input compatibility (74VHC variant uses CMOS-level inputs), 3-state enable timing (enable/disable times ≤9.5 ns), thermal rating (−40 °C to +125 °C), and SO14 package footprint compatibility with legacy LSTTL designs.

Technical Context

This device implements four independent non-inverting buffers, each with active-low 3-state output control (nOE). Each channel accepts CMOS-level inputs (VIH ≥ 3.85 V at VCC = 5.5 V) and drives resistive or capacitive loads up to 50 pF with rail-to-rail output swing.

The architecture supports bus-oriented applications via simultaneous high-impedance output disable across all channels. Input clamping diodes and ESD protection (HBM >2000 V, CDM >1000 V) ensure robustness in mixed-signal environments without external protection circuitry.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage (VCC)	2.0 V to 5.5 V - Enables direct interfacing with 3.3 V and 5 V logic domains without level shifters.
Propagation Delay (tpd)	3.0 ns (typ, VCC = 5 V, CL = 15 pF) - Supports >100 MHz bus toggle rates in point-to-point configurations.
Output Drive (IO)	±25 mA - Sufficient to drive 50 Ω transmission lines or multiple 74-series inputs (fan-out ≥20).
Input Thresholds	VIH = 3.85 V, VIL = 1.65 V (VCC = 5.5 V) - CMOS-compatible thresholds prevent false triggering in noisy industrial settings.
Operating Temperature	−40 °C to +125 °C - Qualified for under-hood automotive modules and industrial PLC backplanes.
ESD Protection	HBM >2000 V, CDM >1000 V - Meets IEC 61000-4-2 Level 2 requirements without added TVS components.
Power Dissipation (Ptot)	500 mW (Tamb ≤100 °C, SO14) - Allows sustained operation in compact enclosures with minimal heatsinking.

Pinout & Package

74VHC125D,118 is housed in a plastic small outline package (SO14, SOT108-1) with 14 leads, 3.9 mm body width, and standard 1.27 mm lead pitch. Pin 1 is marked by a bevelled corner or index notch.

Pin/Terminal	Circuit Role	Design Meaning
1, 4, 10, 13 (nOE)	Active-low output enable	Drives corresponding output (nY) into high-impedance state when HIGH; enables concurrent bus isolation.
2, 5, 9, 12 (nA)	Data input	CMOS-level input with Schmitt-trigger action - rejects <30 ns noise spikes and ensures clean edge detection.
3, 6, 8, 11 (nY)	3-state buffered output	Non-inverting output capable of sourcing/sinking ±25 mA while maintaining VOH ≥3.94 V (IO = −8 mA, VCC = 4.5 V).
7	GND	Signal and power reference plane - must be connected directly to PCB ground plane for stable switching noise margin.
14	VCC	Primary supply rail - requires local 100 nF ceramic decoupling within 5 mm of pin for sub-ns edge integrity.

Key Features

Feature	Design Value
Balanced propagation delays	tpLH and tpHL match within 0.3 ns - eliminates duty-cycle distortion in clock distribution paths.
Schmitt-trigger inputs	Hysteresis ≥0.5 V (VCC = 5 V) - suppresses contact bounce in switch interfaces and EMI-induced glitches on long traces.
Input overvoltage tolerance	VI up to +7.0 V - permits hot-plug operation and safe interfacing with higher-voltage sensors without external clamping.
Wide temperature range	Specified from −40 °C to +125 °C - validated for continuous operation in engine control units and motor drive inverters.
Low static current	ICC ≤ 40 μA (max, VCC = 5.5 V) - reduces quiescent power in battery-backed systems and sleep-mode peripherals.

Applications

Industrial Bus Interface

Microcontroller GPIO Expansion

Use Scenario: Isolating and buffering address/data lines between an ARM Cortex-M7 MCU and a multi-drop RS-485 transceiver array.

IC Role / Device Role / Timing Role: Quad buffer provides direction-controlled signal conditioning with simultaneous 3-state disable during bus arbitration.

Use Value: Eliminates bus contention during master handoff; 3.0 ns tpd ensures setup/hold margins are preserved at 25 MHz bus clock.

Use Scenario: Expanding limited GPIO count on an STM32H743 to drive eight parallel LED indicators and two opto-isolated relay drivers.

IC Role / Device Role / Timing Role: Non-inverting buffer isolates MCU pins from inductive load transients while enabling software-controlled output disable.

Use Value: ±25 mA per output drives LEDs directly; Schmitt inputs reject noise from relay coil flyback coupling.

Legacy TTL System Upgrade

Test Equipment Signal Routing

Use Scenario: Replacing obsolete 74LS125 in a vintage test instrument's control logic board while retaining PCB layout and firmware.

IC Role / Device Role / Timing Role: Pin-compatible drop-in replacement with identical SO14 footprint and active-low OE control.

Use Value: 5x lower ICC vs. LS logic cuts board-level power by 1.2 W; 3.3 V operation enables integration with modern PMIC rails.

Use Scenario: Multiplexing calibration signals between a 16-bit DAC and six precision op-amp test channels in automated test equipment.

IC Role / Device Role / Timing Role: 3-state outputs allow dynamic reconfiguration of analog signal paths without physical relays.

Use Value: 4.0 pF CO minimizes settling time degradation (<50 ps added jitter); VIH/VIL thresholds ensure compatibility with FPGA I/O banks.

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
74VHCT125D,118	Uses TTL-compatible input thresholds (VIH = 2.0 V, VIL = 0.8 V) instead of CMOS thresholds; otherwise identical pinout, timing, and drive.	Required when interfacing with 5 V TTL outputs (e.g., legacy microcontrollers or logic families) without level translation.	Select when driving from 74LS/74ALS sources; avoid if only CMOS-level inputs are present to prevent marginal VIH margin.
SN74LVC125APWR	Lower VCC range (1.65–3.6 V), faster tpd (2.5 ns @ 3.3 V), but no Schmitt inputs and max temp +85 °C only.	Suitable for portable 3.3 V systems where size (TSSOP14) and speed outweigh industrial temp or noise immunity needs.	Choose for battery-powered IoT nodes; not recommended for automotive or factory-floor environments due to temp and ESD limitations.

Compared with 74VHC125D,118, the 74VHCT125D,118 offers guaranteed TTL input compatibility at identical speed and packaging, while the SN74LVC125APWR trades industrial temperature and noise immunity for lower voltage operation and marginally better speed in consumer-grade applications.

Availability

74VHC125D,118 is available at Aetrix Electronics and suitable for industrial automation controllers, automotive body control modules, and test instrumentation requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74VHC125D,118 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 delivering high-performance logic, discrete, and MOSFET solutions optimized for efficiency, reliability, and manufacturability in high-volume applications.

The 74VHC series targets industrial and automotive logic interfacing, emphasizing wide supply range, robust ESD performance, and extended temperature qualification to replace legacy TTL in demanding environments.

FAQ

Can 74VHC125D,118 operate at 3.3 V supply with TTL-level inputs?

No. The 74VHC125D,118 requires CMOS-level inputs (VIH ≥ 3.85 V at VCC = 5.5 V); at 3.3 V supply, its VIH is ~2.1 V. For TTL input compatibility, use the pin-compatible 74VHCT125D,118, which guarantees VIH = 2.0 V across 4.5–5.5 V operation.

What is the maximum capacitive load this device can drive reliably?

Per datasheet Table 7, 74VHC125D,118 is characterized up to 50 pF load capacitance with guaranteed timing (tpd ≤ 7.5 ns at VCC = 5 V). Driving >50 pF increases propagation delay nonlinearly and may cause overshoot; for >100 pF, add series termination or use a dedicated line driver.

Does this part require external pull-up or pull-down resistors on nOE pins?

No. All inputs have internal clamp diodes and defined logic thresholds. However, floating nOE pins risk unintended enable/disable states due to noise; tie unused nOE pins to GND (to force enabled) or VCC (to force disabled) using ≤10 kΩ resistors for deterministic behavior.

How does thermal derating affect power dissipation in SO14 package?

For SO14 (SOT108-1), Ptot = 500 mW up to +100 °C, then derates linearly at 10.1 mW/K. At +125 °C ambient, maximum allowable power drops to 475 mW. This requires verifying junction temperature (Tj = Tamb + (P × RθJA)) stays below 150 °C using RθJA = 125 K/W for SO14 on 2-layer board.

74VHC125D,118 Specifications

Product attributes: Attribute value

Manufacturer:: Nexperia USA Inc.

Series:: 74VHC

Package/Case:: 14-SOIC (0.154", 3.90mm Width)

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:: 8mA, 8mA

Voltage - Supply:: 2V ~ 5.5V

Operating Temperature:: -40°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-SO

74VHC125D,118 FAQ

1.How can I place an order for 74VHC125D,118 through Aetrix?

Please submit a Request for Quotation (RFQ) for 74VHC125D,118 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 74VHC125D,118 reliable?

The price and inventory of 74VHC125D,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74VHC125D,118 is usually 5 days.

3.What payment methods are accepted for 74VHC125D,118?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74VHC125D,118 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74VHC125D,118?

74VHC125D,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74VHC125D,118 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 74VHC125D,118?

For technical support, including 74VHC125D,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74VHC125D,118 requirements.

6.How does Aetrix verify that 74VHC125D,118 is sourced from the original manufacturer or authorized distributors?

All 74VHC125D,118 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 74VHC125D,118 meets industry standards.

7.What is the process for return or replacement of 74VHC125D,118?

All 74VHC125D,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74VHC125D,118, 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 74VHC125D,118 part is unused and in its original packaging.

Return procedure for 74VHC125D,118:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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