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Toshiba Semiconductor and Storage TC74LCX125FK(EL,K)

Name: TC74LCX125FK(EL,K)
Brand: Toshiba Semiconductor and Storage
SKU: TC74LCX125FK(EL,K)
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: TC74LCX125FK(EL,K)

Manufacturer:: Toshiba Semiconductor and Storage

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 14-VFSOP (0.118", 3.00mm Width)

Datasheet:: TC74LCX125FK(EL,K).pdf

Description:: IC BUF NON-INVERT 3.6V 14VSSOP

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Product details

Overview

TC74LCX125FK(EL,K) from Toshiba Electronic Devices & Storage Corporation is a low-voltage quad bus buffer with 5-V tolerant inputs and outputs, designed for 3.3-V system interfacing. It delivers 6.0 ns max propagation delay at VCC = 3.3 V, supports ±24 mA output drive, and operates across 1.65–3.6 V supply range. Used in mixed-voltage digital logic translation between 3.3-V controllers and 5-V peripherals.

For engineers reviewing the TC74LCX125FK(EL,K) datasheet, TC74LCX125FK(EL,K) pinout, TC74LCX125FK(EL,K) application, or TC74LCX125FK(EL,K) equivalent, key selection criteria include 5-V tolerance on all I/O pins, guaranteed 3-state control via active-high OE, JEDEC-standard SOP-14 pin compatibility, and operation down to −40°C ambient.

Technical Context

The TC74LCX125FK(EL,K) implements four independent non-inverting buffers, each with a dedicated active-high 3-state enable (OE) input. All inputs and outputs are rated for DC voltages up to 7.0 V, enabling safe interface with 5-V logic while powered from 3.3 V.

It uses Toshiba's LCX CMOS process to achieve high-speed performance with low static current: ICC ≤ 10 µA over full VCC (1.65–3.6 V) and temperature (−40 to +85°C) ranges. Input leakage remains ≤ ±5.0 µA, and 3-state output off-state current is similarly bounded.

Key Specifications

Parameter	Value and Actual Design Meaning
VCC Range	1.65–3.6 V - Enables direct use in 3.3-V systems without level-shifter circuitry
tpd (max)	6.0 ns @ VCC = 3.3 V - Supports >100 MHz data rates in buffered address/data buses
IOL / IOH	±24 mA @ VCC = 3.0 V - Drives standard TTL loads and multiple CMOS inputs without fanout limitation
Input Voltage Range	0–5.5 V - Accepts 5-V logic HIGH/LOW levels while VCC = 3.3 V, eliminating external clamping diodes
Operating Temperature	−40 to +85°C - Qualified for industrial-grade embedded control and communications equipment
IOZ (3-state leakage)	≤ ±5.0 µA - Ensures minimal signal coupling and noise injection when outputs are disabled

Pinout & Package

TC74LCX125FK(EL,K) is supplied in JEITA-compliant SOP-14 package (SOP14-P-300-1.27A), 1.27 mm pitch, 8.65 mm × 3.9 mm body size, with gull-wing leads.

Pin/Terminal	Circuit Role	Design Meaning
1, 4, 5, 9	OE (Output Enable)	Active-high control per buffer; drives corresponding Y pin to high-impedance when high
2, 6, 10, 13	A (Input)	Non-inverting data input for respective buffer channel
3, 7, 11, 12	Y (Output)	Buffered, 5-V-tolerant output; reflects A when OE = low
14	VCC	Positive supply (1.65–3.6 V); powers internal logic and output drivers
7	GND	Ground reference for all inputs, outputs, and internal circuitry

Key Features

Feature	Design Value
5-V tolerant I/O	All inputs and outputs withstand 0–5.5 V regardless of VCC, enabling plug-and-play interoperation with legacy 5-V logic
Low dynamic power	CPD = 25 pF @ 3.3 V - Predictable switching current (ICC ≈ CPD × VCC × fIN) simplifies power budgeting in high-frequency buses
ESD-protected inputs	Integrated protection circuits withstand ≥2 kV HBM - reduces need for external TVS components in board-level ESD design
JEDEC 74-series pinout	Direct replacement for 74AC125, 74HC125, and 74LV125 in existing layouts - no PCB redesign required
Power-down safety	Inputs and outputs remain protected during VCC = 0 V - prevents back-driving or latch-up when system powers up/down asymmetrically

Applications

Industrial PLC Backplane Interface	Embedded Microcontroller GPIO Expansion
Use Scenario: Interfacing a 3.3-V ARM Cortex-M7 microcontroller to legacy 5-V I/O modules on a DIN-rail mounted PLC backplane. IC Role / Device Role / Timing Role: Level-translating bus buffer isolating MCU-side signals from higher-voltage field-side peripherals. Use Value: Eliminates discrete level-shifters; maintains signal integrity at 20 MHz clock rates while tolerating 5-V transients on field wiring.	Use Scenario: Expanding GPIO count of a 3.3-V RISC-V SoC by driving eight 5-V optocouplers for isolated sensor inputs. IC Role / Device Role / Timing Role: Non-inverting buffer with 3-state control enabling time-multiplexed access to shared 5-V peripheral lines. Use Value: Delivers 24 mA sink/source per output-sufficient to directly drive LED anodes in optocoupler inputs without external transistors.
Automotive Body Control Module	Test Equipment Digital Pattern Generator
Use Scenario: Buffering LIN bus controller outputs to 5-V-compatible window lift motor drivers in a Class B automotive module. IC Role / Device Role / Timing Role: Signal conditioning and voltage-domain bridging between low-voltage MCU and higher-voltage actuator interface ICs. Use Value: −40 to +85°C rating and 5-V tolerance ensure robustness against battery voltage spikes and cabin thermal cycling.	Use Scenario: Generating synchronized 5-V logic patterns from a 3.3-V FPGA-based pattern generator used in IC functional testing. IC Role / Device Role / Timing Role: High-speed, low-skew (≤1.0 ns) quad buffer ensuring simultaneous edge alignment across four test channels. Use Value: 6.0 ns max tpd and <1.0 ns output-to-output skew preserve timing margins in 100+ MHz digital stimulus waveforms.

Industrial PLC Backplane Interface

Embedded Microcontroller GPIO Expansion

Use Scenario: Interfacing a 3.3-V ARM Cortex-M7 microcontroller to legacy 5-V I/O modules on a DIN-rail mounted PLC backplane.

IC Role / Device Role / Timing Role: Level-translating bus buffer isolating MCU-side signals from higher-voltage field-side peripherals.

Use Value: Eliminates discrete level-shifters; maintains signal integrity at 20 MHz clock rates while tolerating 5-V transients on field wiring.

Use Scenario: Expanding GPIO count of a 3.3-V RISC-V SoC by driving eight 5-V optocouplers for isolated sensor inputs.

IC Role / Device Role / Timing Role: Non-inverting buffer with 3-state control enabling time-multiplexed access to shared 5-V peripheral lines.

Use Value: Delivers 24 mA sink/source per output-sufficient to directly drive LED anodes in optocoupler inputs without external transistors.

Automotive Body Control Module

Test Equipment Digital Pattern Generator

Use Scenario: Buffering LIN bus controller outputs to 5-V-compatible window lift motor drivers in a Class B automotive module.

IC Role / Device Role / Timing Role: Signal conditioning and voltage-domain bridging between low-voltage MCU and higher-voltage actuator interface ICs.

Use Value: −40 to +85°C rating and 5-V tolerance ensure robustness against battery voltage spikes and cabin thermal cycling.

Use Scenario: Generating synchronized 5-V logic patterns from a 3.3-V FPGA-based pattern generator used in IC functional testing.

IC Role / Device Role / Timing Role: High-speed, low-skew (≤1.0 ns) quad buffer ensuring simultaneous edge alignment across four test channels.

Use Value: 6.0 ns max tpd and <1.0 ns output-to-output skew preserve timing margins in 100+ MHz digital stimulus waveforms.

Equivalent & Alternatives

The following parts are listed as comparable options for similar quad bus buffer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
74LVC125APW,118	Lower VCC min (1.65 V same), but only 3.6-V I/O tolerance; no 5-V absolute rating	Not suitable for direct 5-V bus connection without external clamping	Select when interfacing exclusively within 3.3-V domains or where 5-V tolerance is not required
SN74LV125AD	Same 5-V tolerant I/O, but slower tpd = 7.5 ns @ 3.3 V; higher ICC = 20 µA typical	Acceptable for <50 MHz applications where lower static power is secondary	Prefer when TI's qualification pedigree or alternate packaging (SOIC-14) is mandated by supply chain policy

Compared with TC74LCX125FK(EL,K), the 74LVC125APW lacks guaranteed 5-V I/O robustness, while SN74LV125AD trades speed and quiescent current for broader vendor support-making TC74LCX125FK(EL,K) optimal for high-speed, mixed-voltage industrial interfaces requiring guaranteed 5-V tolerance.

Availability

TC74LCX125FK(EL,K) is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and test equipment requiring stable component supply, long-term lifecycle assurance, and guaranteed 5-V tolerant logic interfacing.

Supply support for TC74LCX125FK(EL,K) 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

Toshiba Electronic Devices & Storage Corporation designs and manufactures high-reliability semiconductor solutions for industrial, automotive, and infrastructure applications, with deep expertise in CMOS logic and power devices.

The TC74LCX series targets low-voltage, mixed-signal system interfacing-specifically enabling seamless integration between modern 3.3-V processors and legacy 5-V peripherals without external level-shifting circuitry.

FAQ

What is the maximum input voltage rating for TC74LCX125FK(EL,K)?

The TC74LCX125FK(EL,K) supports DC input voltages from −0.5 V to 7.0 V, with guaranteed 5-V tolerance (0–5.5 V) across its full operating temperature range. This allows safe connection to 5-V logic sources even when powered at 3.3 V, eliminating risk of damage or latch-up under normal operation.

Does TC74LCX125FK(EL,K) support true 3-state operation with active-high enable?

Yes, TC74LCX125FK(EL,K) uses active-high OE inputs: when OE = HIGH, the corresponding Y output enters high-impedance state; when OE = LOW, Y follows A. This matches standard 74-series behavior and enables clean bus sharing in multi-driver configurations without pull-up conflicts.

Can TC74LCX125FK(EL,K) operate at 1.8 V supply?

Yes, TC74LCX125FK(EL,K) is fully specified from VCC = 1.65 V to 3.6 V. At 1.8 V ±0.15 V, it achieves tpd ≤ 20.0 ns and maintains 5-V input tolerance-making it suitable for ultra-low-power portable systems where supply scaling is critical.

What is the output drive capability of TC74LCX125FK(EL,K) at 3.3 V?

At VCC = 3.0 V, TC74LCX125FK(EL,K) guarantees |IOL| = 24 mA and |IOH| = 24 mA. At 3.3 V, output drive remains robust-VOH ≥ 2.4 V at IOH = −24 mA and VOL ≤ 0.55 V at IOL = 24 mA-supporting direct drive of TTL loads and multiple CMOS inputs.

Is TC74LCX125FK(EL,K) RoHS compliant and lead-free?

Yes, TC74LCX125FK(EL,K) meets EU RoHS Directive requirements and is manufactured with lead-free terminations. The "(EL,K)" suffix denotes lead-free, halogen-free, and RoHS-compliant packaging per Toshiba's environmental compliance documentation.

TC74LCX125FK(EL,K) Specifications

Product attributes: Attribute value

Manufacturer:: Toshiba Semiconductor and Storage

Series:: 74LCX

Package/Case:: 14-VFSOP (0.118", 3.00mm 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:: 24mA, 24mA

Voltage - Supply:: 1.65V ~ 3.6V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 14-VSSOP

TC74LCX125FK(EL,K) FAQ

1.How can I place an order for TC74LCX125FK(EL,K) through Aetrix?

Please submit a Request for Quotation (RFQ) for TC74LCX125FK(EL,K) 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 TC74LCX125FK(EL,K) reliable?

The price and inventory of TC74LCX125FK(EL,K) are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC74LCX125FK(EL,K) is usually 5 days.

3.What payment methods are accepted for TC74LCX125FK(EL,K)?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC74LCX125FK(EL,K) transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TC74LCX125FK(EL,K)?

TC74LCX125FK(EL,K) orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TC74LCX125FK(EL,K) 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 TC74LCX125FK(EL,K)?

For technical support, including TC74LCX125FK(EL,K) datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC74LCX125FK(EL,K) requirements.

6.How does Aetrix verify that TC74LCX125FK(EL,K) is sourced from the original manufacturer or authorized distributors?

All TC74LCX125FK(EL,K) 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 TC74LCX125FK(EL,K) meets industry standards.

7.What is the process for return or replacement of TC74LCX125FK(EL,K)?

All TC74LCX125FK(EL,K) units undergo pre-shipment inspection (PSI). If there is an issue with TC74LCX125FK(EL,K), 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 TC74LCX125FK(EL,K) part is unused and in its original packaging.

Return procedure for TC74LCX125FK(EL,K):

1.Submit a request within 90 days.

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

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