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

Diodes Incorporated 74AHCT125S14-13

Name: 74AHCT125S14-13
Brand: Diodes Incorporated
SKU: 74AHCT125S14-13
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74AHCT125S14-13

Manufacturer:: Diodes Incorporated

Category:: Buffers, Drivers, Receivers, Transceivers

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

Datasheet:: 74AHCT125S14-13.pdf

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

Quantity:: RFQ Add To RFQ list

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Product details

Overview

74AHCT125S14-13 from Diodes Incorporated is a quadruple 3-state non-inverting buffer IC with independent active-low enable inputs, designed for 4.5V–5.5V TTL-compatible logic interfacing in digital systems. It delivers 8mA output drive at V_CC = 4.5V, features Schmitt-trigger inputs for noise immunity, and operates across –40°C to +125°C ambient temperature.

For engineers reviewing the 74AHCT125S14-13 datasheet, 74AHCT125S14-13 pinout, 74AHCT125S14-13 application, or 74AHCT125S14-13 equivalent, key selection criteria include its SO-14 package, 3.0ns typical propagation delay (CL = 15pF), ±2.5μA high-impedance leakage, TTL-level input compatibility, and industrial-grade thermal range.

Technical Context

The 74AHCT125S14-13 implements four independent non-inverting buffers, each with dedicated active-low 3-state enable (OE) control-no shared bus arbitration logic. All inputs incorporate Schmitt-trigger action, providing hysteresis of ~0.3V for robust noise rejection on slow or noisy signals.

It operates strictly within 4.5V–5.5V supply range, with guaranteed VIH ≥ 2.0V and VIL ≤ 0.8V across temperature, ensuring reliable interfacing with legacy TTL outputs and modern CMOS logic. Output drive capability is specified at ±8mA under 4.5V, supporting direct fan-out to multiple 74-series loads.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	4.5V to 5.5V - ensures compatibility with standard 5V TTL/CMOS rails and tolerance against ripple or droop.
Propagation Delay (t_PD)	3.0ns typ. @ CL = 15pF - enables use in sub-100MHz synchronous data paths without timing closure issues.
Output Drive (I_OH/I_OL)	±8mA @ V_CC = 4.5V - supports driving 10 LSTTL loads or two 74AHCT inputs simultaneously.
Z-State Leakage (I_OZ)	±2.5μA max. @ V_CC = 5.5V - minimizes unintended current draw when outputs are disabled on shared buses.
Input Hysteresis	~0.3V (Schmitt-trigger) - rejects up to 300mV of ground bounce or EMI on control lines like OE.
Operating Temperature	–40°C to +125°C - qualified for under-hood automotive modules and industrial PLC backplanes.

Pinout & Package

74AHCT125S14-13 is housed in a 14-pin Small Outline (SO-14) package per JEDEC MS-012, with 1.27mm pitch, gull-wing leads, and 8.53–8.74mm body length. Pin 1 is marked by a beveled corner or notch.

Pin/Terminal	Circuit Role	Design Meaning
1, 4, 10, 13	OE_n (Active-Low Enable)	Controls 3-state output of corresponding buffer; low = enabled, high = high-Z.
2, 5, 9, 12	A_n (Input)	Non-inverting data input; Schmitt-triggered for noise margin.
3, 6, 8, 11	Y_n (Output)	Buffered non-inverting output; drives bus or downstream logic only when OE_n = L.
7	GND	Reference return path for all I/O and internal circuitry; must be low-impedance.
14	V_CC	Positive supply rail; bypassing with 100nF ceramic near pin is mandatory for stable switching.

Key Features

Feature	Design Value
TTL-Compatible Inputs	VIH ≥ 2.0V / VIL ≤ 0.8V at 4.5–5.5V - interoperates directly with 74LS, 74F, and microcontroller GPIOs without level shifters.
Independent 3-State Control	Four separate OE pins - allows selective bus isolation per channel, enabling dynamic bus sharing in multi-master systems.
Low Power CMOS Core	ICC ≤ 40μA max. @ TA = –40°C to +125°C - reduces quiescent power in always-on subsystems like BIOS configuration logic.
ESD Robustness	2kV HBM, 1kV CDM, 200V MM - withstands handling and board assembly without external protection diodes.

Applications

PC Peripheral Bus Isolation

Industrial I/O Expansion Module

Use Scenario: Isolating USB hub controller data lines from legacy parallel port logic during hot-plug transitions.

IC Role / Device Role / Timing Role: Bidirectional buffer with per-line OE control prevents back-driving during enumeration handshake.

Use Value: Eliminates need for discrete MOSFET switches while maintaining <5ns timing margin on 12MHz control strobes.

Use Scenario: Level-shifting and bus contention prevention between ARM-based PLC CPU and 24V-rated digital input cards.

IC Role / Device Role / Timing Role: Unidirectional signal conditioner that decouples noisy field-side logic from clean controller-side logic.

Use Value: Schmitt-trigger inputs reject >300mV of induced noise on long cable runs; 125°C rating supports enclosure mounting near motor drives.

Embedded Display Interface Buffering

Legacy BIOS Configuration Logic

Use Scenario: Driving LVDS transmitter enable signals and backlight PWM lines from low-drive-capability SoC GPIOs.

IC Role / Device Role / Timing Role: Non-inverting buffer with precise enable timing (t_EN = 6.7ns typ.) synchronizes display power-up sequencing.

Use Value: Ensures t_EN/t_DIS skew <1ns across four channels, preventing partial frame corruption during boot.

Use Scenario: Glue logic for SPI flash read/write control lines in UEFI firmware storage subsystems.

IC Role / Device Role / Timing Role: 3-state buffer isolates flash chip select during CPU reset to prevent spurious writes.

Use Value: Z-state leakage <2.5μA avoids false CS assertion during deep-sleep modes, preserving flash integrity over 10-year deployments.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 3-state buffer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74AHCT125DR	Same logic function, identical AC/DC specs, but TI's SO-14 variant has slightly higher ICC (50μA max) and no CDM ESD rating published.	Valid for commercial-temp designs; not recommended for extended industrial temp range (>85°C).	Select if sourcing from TI-authorized channels and operating exclusively at 0–70°C.
74LVC125APW,118	Lower V_CC range (1.65–3.6V), no Schmitt inputs, 24mA drive - incompatible with 5V TTL interfaces without level translation.	Suitable only for 3.3V-only systems; requires external pull-ups for 5V-tolerant operation.	Choose only when migrating fully to 3.3V logic domains and abandoning legacy 5V peripherals.

Compared with SN74AHCT125DR and 74LVC125APW,118, the 74AHCT125S14-13 uniquely combines 5V TTL compatibility, industrial temperature support, Schmitt-trigger noise immunity, and Diodes' validated 2kV HBM ESD robustness - making it the sole fit for mixed-voltage, noise-prone, long-lifecycle embedded control applications.

Availability

74AHCT125S14-13 is available at Aetrix Electronics and suitable for PC peripheral bus isolation, industrial I/O expansion modules, and embedded display interface buffering requiring stable component supply and full industrial temperature qualification.

Supply support for 74AHCT125S14-13 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

Diodes Incorporated is a global manufacturer of discrete semiconductors and analog ICs, specializing in high-reliability, application-optimized components for industrial, computing, and automotive markets.

The 74AHCT logic family targets robust 5V digital interfacing where TTL compatibility, noise immunity, and extended temperature operation are critical - especially in legacy system upgrades and industrial control hardware.

FAQ

What is the maximum clock frequency this device can reliably handle?

The 74AHCT125S14-13 is not a clocked device but a combinational buffer. Its 3.0ns typical propagation delay (CL = 15pF) supports data rates up to ~160MHz in point-to-point routing. For bus applications, maximum usable frequency depends on trace capacitance and termination - verified operation up to 80MHz has been documented with 25pF load and proper PCB layout.

Can unused inputs be left floating?

No. Per Diodes' Recommended Operating Conditions (Note 5), all unused inputs must be tied to either V_CC or GND. Floating inputs may cause excessive ICC due to linear-region conduction in CMOS input stages, leading to overheating or unpredictable output states.

Is this part suitable for bidirectional data bus applications?

No. The 74AHCT125S14-13 provides unidirectional buffering only (A → Y). For bidirectional bus transceivers, consider the 74AHCT245 or 74LVC245 families. This device requires separate transmit/receive paths or external direction control logic.

Does the SO-14 package meet IPC Class 3 soldering requirements?

Yes. The SO-14 package (S14) used in 74AHCT125S14-13 conforms to JEDEC MS-012 and supports reflow profiles compliant with IPC-J-STD-020D for moisture sensitivity level 1. Diodes' AP02002 package drawing confirms lead finish (100% matte Sn) and thermal mass suitable for Class 3 assembly with peak temperatures up to 260°C.

74AHCT125S14-13 Specifications

Product attributes: Attribute value

Manufacturer:: Diodes Incorporated

Series:: 74AHCT

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:: 4.5V ~ 5.5V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-SO

74AHCT125S14-13 FAQ

1.How can I place an order for 74AHCT125S14-13 through Aetrix?

Please submit a Request for Quotation (RFQ) for 74AHCT125S14-13 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 74AHCT125S14-13 reliable?

The price and inventory of 74AHCT125S14-13 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AHCT125S14-13 is usually 5 days.

3.What payment methods are accepted for 74AHCT125S14-13?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AHCT125S14-13 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74AHCT125S14-13?

74AHCT125S14-13 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74AHCT125S14-13 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 74AHCT125S14-13?

For technical support, including 74AHCT125S14-13 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AHCT125S14-13 requirements.

6.How does Aetrix verify that 74AHCT125S14-13 is sourced from the original manufacturer or authorized distributors?

All 74AHCT125S14-13 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 74AHCT125S14-13 meets industry standards.

7.What is the process for return or replacement of 74AHCT125S14-13?

All 74AHCT125S14-13 units undergo pre-shipment inspection (PSI). If there is an issue with 74AHCT125S14-13, 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 74AHCT125S14-13 part is unused and in its original packaging.

Return procedure for 74AHCT125S14-13:

1.Submit a request within 90 days.

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

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