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

NXP Semiconductors 74HCT125N,652

Name: 74HCT125N,652
Brand: NXP Semiconductors
SKU: 74HCT125N,652
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74HCT125N,652

Manufacturer:: NXP Semiconductors

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 14-DIP (0.300", 7.62mm)

Datasheet:: 74HCT125N,652.pdf

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

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Product details

Overview

74HCT125N,652 from NXP Semiconductors is a quad 3-state buffer/line driver with TTL-compatible inputs and CMOS outputs, operating from 4.5 V to 5.5 V, supporting −40 °C to +125 °C ambient range, and delivering 6 mA output drive at V_CC = 4.5 V. It serves as a bidirectional bus interface or signal isolator in digital logic systems requiring controlled data routing.

For engineers reviewing the 74HCT125N,652 datasheet, 74HCT125N,652 pinout, 74HCT125N,652 application, or 74HCT125N,652 equivalent, key selection criteria include its TTL-level input compatibility, 3-state enable control per channel, propagation delay of 15 ns (typ) at 4.5 V, low static current (<160 µA), and DIP14 package suitability for prototyping and legacy board designs.

Technical Context

This device implements four independent non-inverting buffers, each with an active-low 3-state output enable (nOE). Each channel operates with separate input (nA), output (nY), and enable (nOE) terminals - no shared control logic across channels.

Input clamping diodes allow safe interfacing to voltages exceeding V_CC when used with current-limiting resistors. The 74HCT125N,652 adheres to JEDEC standard no. 7A and provides HBM ESD protection >2000 V and MM >200 V.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply voltage	4.5 V to 5.5 V - ensures compatibility with 5 V TTL logic families and stable operation across industrial temperature range
Input voltage thresholds	V_IL ≤ 0.8 V, V_IH ≥ 2.0 V - guarantees reliable recognition of standard TTL logic levels
Output drive capability	±6 mA at V_CC = 4.5 V - sufficient to drive multiple 74-series inputs or moderate capacitive loads
Propagation delay	15 ns (typ) at V_CC = 4.5 V, C_L = 50 pF - enables use in medium-speed digital interfaces up to ~30 MHz
Operating temperature	−40 °C to +125 °C - qualified for extended industrial and under-hood applications
Quiescent supply current	≤160 µA at V_CC = 5.5 V - supports low-power system standby modes without external gating
ESD protection	HBM >2000 V, MM >200 V - meets robustness requirements for manual handling and board-level integration

Pinout & Package

DIP14 plastic dual in-line package (300 mil), 14-pin through-hole format with 0.1-inch lead pitch, suitable for breadboarding, socket-based testing, and legacy PCB layouts.

Pin/Terminal	Circuit Role	Design Meaning
1, 4, 10, 13	nOE (active LOW)	Independent 3-state enable per buffer - drives corresponding output to high-impedance when HIGH
2, 5, 9, 12	nA (input)	Non-inverting data input per channel - accepts TTL-level signals directly
3, 6, 8, 11	nY (output)	Buffered, 3-state output - presents logic-high, logic-low, or high-Z state based on nOE and nA
7	GND	Ground reference for all I/O and internal circuitry - must be connected to system 0 V plane
14	V_CC	Positive supply rail - decoupling capacitor (100 nF) recommended adjacent to pin

Key Features

Feature	Design Value
TTL-compatible inputs	Accepts standard 5 V TTL logic thresholds without level-shifting, simplifying integration into mixed-logic systems
Per-channel 3-state control	Four independent nOE inputs allow selective bus arbitration or dynamic channel isolation without global reset
Input clamp diodes	Enable safe overvoltage tolerance (up to V_CC + 0.5 V) when used with series current-limiting resistors
Wide temperature range	Specified from −40 °C to +125 °C - supports deployment in harsh environments without derating
JEDEC 7A compliance	Ensures interoperability with industry-standard test equipment, programming tools, and logic analyzers

Applications

Industrial Bus Interface	Legacy System Signal Isolation
Use Scenario: Bidirectional data transfer between microcontroller peripherals and legacy parallel buses (e.g., ISA, GPIB, or custom backplanes). IC Role / Device Role / Timing Role: Quad buffer isolates direction-sensitive lines while enabling/disabling each channel independently to prevent bus contention. Use Value: Eliminates need for discrete transceivers or complex enable sequencing; supports hot-swap-safe bus partitioning via individual nOE control.	Use Scenario: Interfacing modern FPGA I/O banks to aging 5 V TTL subsystems where voltage translation and drive strength mismatch exist. IC Role / Device Role / Timing Role: Level-tolerant buffer translates FPGA 3.3 V outputs to full 5 V swing while sourcing/sinking 6 mA per line. Use Value: Avoids external pull-ups or dedicated level shifters; maintains signal integrity at 30 MHz due to 15 ns propagation delay and 12 ns transition time.
Test Equipment Signal Conditioning	Programmable Logic I/O Expansion
Use Scenario: Signal conditioning and fan-out in automated test equipment (ATE) where multiple DUTs share a common stimulus/control bus. IC Role / Device Role / Timing Role: 3-state outputs allow one 74HCT125N,652 to drive multiple downstream loads while others remain electrically isolated. Use Value: Enables dynamic reconfiguration of test paths without hardware rewiring; high-impedance state prevents loading during idle cycles.	Use Scenario: Expanding I/O count in CPLD- or GAL-based control logic where additional buffered outputs are needed for relay drivers or LED arrays. IC Role / Device Role / Timing Role: Provides four extra non-inverting, 3-state outputs with TTL-compatible inputs synchronized to existing logic clock domain. Use Value: Reduces gate count in programmable logic; eliminates timing skew from discrete transistor buffers due to matched propagation characteristics.

Industrial Bus Interface

Legacy System Signal Isolation

Use Scenario: Bidirectional data transfer between microcontroller peripherals and legacy parallel buses (e.g., ISA, GPIB, or custom backplanes).

IC Role / Device Role / Timing Role: Quad buffer isolates direction-sensitive lines while enabling/disabling each channel independently to prevent bus contention.

Use Value: Eliminates need for discrete transceivers or complex enable sequencing; supports hot-swap-safe bus partitioning via individual nOE control.

Use Scenario: Interfacing modern FPGA I/O banks to aging 5 V TTL subsystems where voltage translation and drive strength mismatch exist.

IC Role / Device Role / Timing Role: Level-tolerant buffer translates FPGA 3.3 V outputs to full 5 V swing while sourcing/sinking 6 mA per line.

Use Value: Avoids external pull-ups or dedicated level shifters; maintains signal integrity at 30 MHz due to 15 ns propagation delay and 12 ns transition time.

Test Equipment Signal Conditioning

Programmable Logic I/O Expansion

Use Scenario: Signal conditioning and fan-out in automated test equipment (ATE) where multiple DUTs share a common stimulus/control bus.

IC Role / Device Role / Timing Role: 3-state outputs allow one 74HCT125N,652 to drive multiple downstream loads while others remain electrically isolated.

Use Value: Enables dynamic reconfiguration of test paths without hardware rewiring; high-impedance state prevents loading during idle cycles.

Use Scenario: Expanding I/O count in CPLD- or GAL-based control logic where additional buffered outputs are needed for relay drivers or LED arrays.

IC Role / Device Role / Timing Role: Provides four extra non-inverting, 3-state outputs with TTL-compatible inputs synchronized to existing logic clock domain.

Use Value: Reduces gate count in programmable logic; eliminates timing skew from discrete transistor buffers due to matched propagation characteristics.

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
74HCT125D,652	SO14 surface-mount package (3.9 mm body width); identical electrical specs and pinout	Suitable for space-constrained PCBs and automated assembly; requires reflow-compatible layout	Select when transitioning from through-hole to SMT production or optimizing board density
SN74HCT125N	Same function and pinout; manufactured by Texas Instruments; V_IH/V_IL thresholds match within ±0.1 V; HBM ESD rated at 2000 V	Validated in TI-specific reference designs; may differ in traceability documentation and lot-level qualification	Choose for multi-source procurement or TI-design ecosystem alignment

Compared with 74HCT125N,652, the SO14 variant offers identical performance in a smaller footprint but requires SMT process capability, while the TI SN74HCT125N provides second-source assurance with minor documentation and qualification differences - neither is pin-compatible without layout revision, but both serve the same functional role in 5 V TTL-interfaced systems.

Availability

74HCT125N,652 is available at Aetrix Electronics and suitable for industrial bus interface, legacy system signal isolation, test equipment signal conditioning, and programmable logic I/O expansion requiring stable component supply and long-term obsolescence management.

Supply support for 74HCT125N,652 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 company headquartered in Eindhoven, Netherlands, specializing in secure connectivity solutions for automotive, industrial, and IoT applications.

The 74HCT125N,652 belongs to NXP's legacy logic family designed for robust, drop-in replacement of obsolete TTL devices in industrial control, instrumentation, and maintenance-critical systems.

FAQ

What is the maximum supply voltage rating for the 74HCT125N,652?

The 74HCT125N,652 has an absolute maximum supply voltage (V_CC) of +7 V, but its recommended operating range is strictly 4.5 V to 5.5 V. Operation above 5.5 V risks violating input/output voltage margins and may cause increased leakage or accelerated wear. Always maintain V_CC within the recommended range to ensure guaranteed timing, drive strength, and reliability for the 74HCT125N,652.

Does the 74HCT125N,652 support operation at −40 °C?

Yes, the 74HCT125N,652 is fully specified and tested from −40 °C to +125 °C. All key parameters-including propagation delay, output drive, and input thresholds-are guaranteed across this extended industrial temperature range. This makes the 74HCT125N,652 suitable for outdoor equipment, factory automation, and other environments where ambient extremes occur.

Can the 74HCT125N,652 drive a 50 pF load at 30 MHz?

The 74HCT125N,652 delivers 15 ns typical propagation delay and 12 ns typical transition time at V_CC = 4.5 V with C_L = 50 pF, supporting clean signal edges up to ~30 MHz. However, sustained 30 MHz switching requires careful attention to power supply decoupling and PCB layout-place a 100 nF ceramic capacitor near V_CC/GND pins of the 74HCT125N,652 to suppress switching noise.

Is the 74HCT125N,652 pin-compatible with the 74HC125N?

Yes, the 74HCT125N,652 and 74HC125N share identical pinout, package (DIP14), and functional architecture. The key difference lies in input threshold compatibility: the 74HCT125N,652 accepts TTL-level inputs (V_IH ≥ 2.0 V), while the 74HC125N requires CMOS-level inputs (V_IH ≥ 3.15 V at V_CC = 4.5 V). Swapping them requires verifying source logic family compatibility before substitution in the 74HCT125N,652 design.

What is the purpose of the input clamp diodes in the 74HCT125N,652?

The input clamp diodes in the 74HCT125N,652 protect against input voltages exceeding V_CC + 0.5 V or falling below GND − 0.5 V. When used with external series current-limiting resistors (e.g., 1 kΩ), they allow safe interfacing to higher-voltage sources-such as 12 V control signals-without damaging the 74HCT125N,652. This feature eliminates need for external protection components in many mixed-voltage scenarios.

74HCT125N,652 Specifications

Product attributes: Attribute value

Manufacturer:: NXP Semiconductors

Series:: 74HCT

Package/Case:: 14-DIP (0.300", 7.62mm)

Packaging:: Tube

Product Status:: Obsolete

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:: 6mA, 6mA

Voltage - Supply:: 4.5V ~ 5.5V

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

Grade:: -

Qualification:: -

Mounting Type:: Through Hole

Supplier Device Package:: 14-DIP

74HCT125N,652 FAQ

1.How can I place an order for 74HCT125N,652 through Aetrix?

Please submit a Request for Quotation (RFQ) for 74HCT125N,652 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 74HCT125N,652 reliable?

The price and inventory of 74HCT125N,652 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT125N,652 is usually 5 days.

3.What payment methods are accepted for 74HCT125N,652?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT125N,652 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74HCT125N,652?

74HCT125N,652 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74HCT125N,652 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 74HCT125N,652?

For technical support, including 74HCT125N,652 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT125N,652 requirements.

6.How does Aetrix verify that 74HCT125N,652 is sourced from the original manufacturer or authorized distributors?

All 74HCT125N,652 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 74HCT125N,652 meets industry standards.

7.What is the process for return or replacement of 74HCT125N,652?

All 74HCT125N,652 units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT125N,652, 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 74HCT125N,652 part is unused and in its original packaging.

Return procedure for 74HCT125N,652:

1.Submit a request within 90 days.

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

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