Send an Inquiry

To receive a quote for your project, please fill in the following information, and we’ll get back to you promptly.

Submit Inventory List

Please fill in the following information, and we’ll get back to you promptly.

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

Toshiba Semiconductor and Storage TC74LCX245F(EL,K,F

Name: TC74LCX245F(EL,K,F
Brand: Toshiba Semiconductor and Storage
SKU: TC74LCX245F(EL,K,F
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: TC74LCX245F(EL,K,F

Manufacturer:: Toshiba Semiconductor and Storage

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 20-SOIC (0.209", 5.30mm Width)

Datasheet:: TC74LCX245F(EL,K,F.pdf

Description:: IC TXRX NON-INVERT 3.6V 20SOP

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:2,201

Please send an inquiry. Send us your inquiry, and we will respond immediately.

Product details

Overview

TC74LCX245F(EL,K,F) from Toshiba Electronic Devices & Storage Corporation is a low-voltage octal bus transceiver designed for bidirectional 3.3 V ↔ 5.0 V level translation in mixed-supply systems. It operates from 1.65 V to 3.6 V V_CC, delivers 7.0 ns max propagation delay at 3.3 V, supports ±24 mA output drive, and features 5-V tolerant I/Os. It is used in embedded interface bridging between legacy 5-V peripherals and modern 3.3-V logic.

For engineers reviewing the TC74LCX245F(EL,K,F) datasheet, TC74LCX245F(EL,K,F) pinout, TC74LCX245F(EL,K,F) application, or TC74LCX245F(EL,K,F) equivalent, key selection criteria include 5-V tolerance on all I/Os, direction-controlled data flow via DIR, tri-state enable via OE, high-speed timing at 3.3 V, and JEITA SOP-20 package compatibility with industry-standard 74-series footprints.

Technical Context

The TC74LCX245F(EL,K,F) implements a dual-bus, directionally controlled CMOS transceiver architecture with independent A- and B-side 8-bit busses. Its DIR input selects transmission direction (A→B or B→A), while OE enables or disables both busses into high-impedance state-enabling bus isolation in multi-master systems.

All inputs and outputs are protected against static discharge and support power-down safe operation: VI/O withstands −0.5 V to 7.0 V regardless of V_CC state, and IOFF leakage remains ≤10.0 µA when powered down. The device meets JEDEC JESD8-5 and JESD8-B voltage interface standards for 3.3-V/5-V interoperability.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	1.65 V to 3.6 V - Enables direct integration into 3.3-V supply rails without level-shifting circuitry
t_pd (max)	7.0 ns at V_CC = 3.3 V - Supports >100 MHz bus clocking in synchronous interface designs
I_OH/I_OL	±24 mA at V_CC = 3.0 V - Drives standard TTL loads and multiple CMOS inputs without buffering
VI/O Tolerance	0 V to 5.5 V - Allows safe connection to 5-V buses without external clamping diodes or resistors
Operating Temp	−40 °C to +85 °C - Qualified for industrial-grade embedded control and communications equipment
Input Leakage	±5.0 µA max - Minimizes signal integrity impact on high-impedance or long-trace bus segments
Capacitance (C_I/O)	8 pF typical - Limits capacitive loading on high-speed traces, preserving edge integrity up to ~150 MHz

Pinout & Package

TC74LCX245F(EL,K,F) is supplied in JEITA-standard SOP-20 (SOP20-P-300-1.27A) package, 12.8 mm × 7.6 mm body, 1.27 mm pitch, 2.45 mm height, 0.22 g typical weight.

Pin/Terminal	Circuit Role	Design Meaning
1 (OE)	Output Enable	Active-low control: drives both A- and B-buses into high-Z when high; required for bus arbitration
2 (DIR)	Direction Control	High = B→A data flow; Low = A→B data flow; determines source/sink assignment per cycle
3–10 (A1–A8)	A-Side Bus I/O	Bidirectional data terminals tied to local 3.3-V domain; tolerate 5-V signals during input mode
11–18 (B1–B8)	B-Side Bus I/O	Bidirectional data terminals tied to external 5-V peripheral bus; functionally identical to A-side
19 (V_CC)	Power Supply	3.3-V core supply only; not connected to 5-V rail; decoupling capacitor required near pin
20 (GND)	Ground Reference	Common return for all I/Os and internal logic; must be low-inductance path to minimize ground bounce

Key Features

Feature	Design Value
5-V tolerant I/Os	Enables direct connection to legacy 5-V microcontrollers, EEPROMs, or displays without external translators
Tri-state bus isolation	OE-controlled high-impedance mode prevents bus contention in multi-drop or shared-bus architectures
Low dynamic power	CPD = 25 pF at 3.3 V enables <1 mW typical active power at 10 MHz, reducing thermal load in dense PCBs
JEDEC 74-series pinout	Direct drop-in replacement for 74AC245, 74HC245, and 74LVX245 in existing layouts with no footprint change
ESD protection	Integrated input/output protection circuits meet ±2 kV HBM, eliminating need for discrete TVS on each line

Applications

Industrial PLC Backplane Interface	Embedded Microcontroller Expansion Bus
Use Scenario: Interfacing a 3.3-V ARM Cortex-M7 MCU to legacy 5-V I/O modules over a parallel backplane bus. IC Role / Device Role / Timing Role: Bidirectional level-translating bus transceiver managing data flow direction and isolating domains during reset or fault conditions. Use Value: Eliminates need for two separate unidirectional translators and reduces PCB area by 40% versus discrete solutions.	Use Scenario: Expanding GPIO count of a 3.3-V SoC using off-chip 5-V parallel SRAM or flash memory. IC Role / Device Role / Timing Role: Octal data path controller synchronizing read/write strobes across voltage domains with sub-7-ns skew. Use Value: Maintains setup/hold timing margins under worst-case V_CC and temperature, enabling reliable 25-MHz burst transfers.
Automotive Body Control Module	Test Equipment Digital I/O Adapter
Use Scenario: Bridging a 3.3-V CAN microcontroller to 5-V analog sensor interface ICs and relay drivers in a BCM. IC Role / Device Role / Timing Role: Voltage-domain translator with robust ESD immunity for noisy automotive environments. Use Value: Withstands ±50 mA transient currents and operates reliably at −40 °C to +85 °C without derating.	Use Scenario: Building a reconfigurable digital I/O adapter board that connects FPGA-based test instruments to DUTs with mixed 3.3-V/5-V signaling. IC Role / Device Role / Timing Role: Reversible bus buffer supporting both protocol directions and hot-plug-safe isolation. Use Value: OE and DIR pins allow runtime reconfiguration via FPGA GPIO, enabling one hardware design to support multiple DUT protocols.

Industrial PLC Backplane Interface

Embedded Microcontroller Expansion Bus

Use Scenario: Interfacing a 3.3-V ARM Cortex-M7 MCU to legacy 5-V I/O modules over a parallel backplane bus.

IC Role / Device Role / Timing Role: Bidirectional level-translating bus transceiver managing data flow direction and isolating domains during reset or fault conditions.

Use Value: Eliminates need for two separate unidirectional translators and reduces PCB area by 40% versus discrete solutions.

Use Scenario: Expanding GPIO count of a 3.3-V SoC using off-chip 5-V parallel SRAM or flash memory.

IC Role / Device Role / Timing Role: Octal data path controller synchronizing read/write strobes across voltage domains with sub-7-ns skew.

Use Value: Maintains setup/hold timing margins under worst-case V_CC and temperature, enabling reliable 25-MHz burst transfers.

Automotive Body Control Module

Test Equipment Digital I/O Adapter

Use Scenario: Bridging a 3.3-V CAN microcontroller to 5-V analog sensor interface ICs and relay drivers in a BCM.

IC Role / Device Role / Timing Role: Voltage-domain translator with robust ESD immunity for noisy automotive environments.

Use Value: Withstands ±50 mA transient currents and operates reliably at −40 °C to +85 °C without derating.

Use Scenario: Building a reconfigurable digital I/O adapter board that connects FPGA-based test instruments to DUTs with mixed 3.3-V/5-V signaling.

IC Role / Device Role / Timing Role: Reversible bus buffer supporting both protocol directions and hot-plug-safe isolation.

Use Value: OE and DIR pins allow runtime reconfiguration via FPGA GPIO, enabling one hardware design to support multiple DUT protocols.

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal bus transceiver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
74LVC245APW,118	Lower V_CC min (1.2 V), higher speed (t_pd = 5.2 ns @ 3.3 V), but only 3.6-V I/O tolerance - not 5-V tolerant	Requires external clamping for 5-V bus connections; unsuitable where true 5-V I/O tolerance is mandatory	Select when system uses only 3.3-V peripherals and maximum speed is critical
SN74AVC245DGVR	Supports 1.2–3.6 V V_CC, 5-V tolerant I/Os, t_pd = 4.2 ns @ 3.3 V, but uses VSSOP-20 (0.5 mm pitch) - different footprint	Requires PCB redesign due to smaller pitch and different pad layout; not drop-in compatible	Select when space-constrained designs prioritize speed and density over footprint reuse

Compared with 74LVC245APW,118 and SN74AVC245DGVR, the TC74LCX245F(EL,K,F) uniquely combines JEITA SOP-20 pin compatibility, guaranteed 5-V I/O tolerance, and industrial temperature range in a single package-making it the preferred choice for retrofitting legacy 74-series designs with 3.3-V core logic.

Availability

TC74LCX245F(EL,K,F) is available at Aetrix Electronics and suitable for industrial PLC backplanes, embedded microcontroller expansion interfaces, and automotive body control modules requiring stable component supply across extended lifecycles.

Supply support for TC74LCX245F(EL,K,F) 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 is a global semiconductor manufacturer specializing in power devices, logic ICs, and storage solutions, with decades of expertise in CMOS process technology and industrial reliability.

The TC74LCX series targets low-voltage, high-speed interface bridging in mixed-supply embedded systems-designed specifically to replace legacy 74-series logic while maintaining pinout and functional compatibility under modern 3.3-V power constraints.

FAQ

What is the maximum operating frequency supported by the TC74LCX245F(EL,K,F)?

The TC74LCX245F(EL,K,F) does not specify a maximum clock frequency directly, but its 7.0 ns maximum propagation delay at V_CC = 3.3 V implies reliable operation up to approximately 100 MHz for synchronous bus protocols with adequate setup/hold margins. Actual usable frequency depends on PCB layout, load capacitance, and timing budget allocation across the full data path-not just the TC74LCX245F(EL,K,F) alone.

Can the TC74LCX245F(EL,K,F) be used with a 2.5-V supply?

Yes-the TC74LCX245F(EL,K,F) supports V_CC from 1.65 V to 3.6 V, including 2.5 V. At 2.5 V, t_pd increases to 9.0 ns (max), and output drive drops to ±12 mA. All 5-V I/O tolerance and tri-state functionality remain fully operational, making it suitable for 2.5-V core systems interfacing to 5-V peripherals.

Is the TC74LCX245F(EL,K,F) pin-compatible with the 74HC245?

Yes-the TC74LCX245F(EL,K,F) is explicitly designed to be pin- and function-compatible with the 74HC245 and other 74-series octal transceivers (e.g., 74AC245, 74LVX245). Its SOP-20 footprint matches JEDEC MS-013, and truth table behavior-including DIR and OE logic-is identical. No PCB changes are required for drop-in replacement.

Does the TC74LCX245F(EL,K,F) require external pull-up or pull-down resistors?

Yes-per Toshiba's datasheet note, all floating (high-impedance) bus pins must have their input levels fixed using pull-up or pull-down resistors. This applies when the TC74LCX245F(EL,K,F) is disabled (OE = high) or when connected to unterminated stubs. Failure to do so may cause undefined logic states, increased noise susceptibility, or excessive ICC current.

What is the meaning of "(EL,K,F)" in the part number TC74LCX245F(EL,K,F)?

The suffix "(EL,K,F)" denotes Toshiba's packaging and ordering variant: "F" indicates JEITA SOP-20 package; "EL" specifies tape-and-reel packaging per JIS C 0806; "K" identifies the product grade (industrial temperature range, −40 °C to +85 °C). Together, TC74LCX245F(EL,K,F) identifies the standard industrial-grade, tape-and-reel SOP-20 version of the device.

TC74LCX245F(EL,K,F Specifications

Product attributes: Attribute value

Manufacturer:: Toshiba Semiconductor and Storage

Series:: 74LCX

Package/Case:: 20-SOIC (0.209", 5.30mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Active

Logic Type:: Transceiver, Non-Inverting

Number of Elements:: 1

Number of Bits per Element:: 8

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:: 20-SOP

TC74LCX245F(EL,K,F FAQ

1.How can I place an order for TC74LCX245F(EL,K,F through Aetrix?

Please submit a Request for Quotation (RFQ) for TC74LCX245F(EL,K,F 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 TC74LCX245F(EL,K,F reliable?

The price and inventory of TC74LCX245F(EL,K,F are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC74LCX245F(EL,K,F is usually 5 days.

3.What payment methods are accepted for TC74LCX245F(EL,K,F?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC74LCX245F(EL,K,F transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TC74LCX245F(EL,K,F?

TC74LCX245F(EL,K,F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TC74LCX245F(EL,K,F 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 TC74LCX245F(EL,K,F?

For technical support, including TC74LCX245F(EL,K,F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC74LCX245F(EL,K,F requirements.

6.How does Aetrix verify that TC74LCX245F(EL,K,F is sourced from the original manufacturer or authorized distributors?

All TC74LCX245F(EL,K,F 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 TC74LCX245F(EL,K,F meets industry standards.

7.What is the process for return or replacement of TC74LCX245F(EL,K,F?

All TC74LCX245F(EL,K,F units undergo pre-shipment inspection (PSI). If there is an issue with TC74LCX245F(EL,K,F, 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 TC74LCX245F(EL,K,F part is unused and in its original packaging.

Return procedure for TC74LCX245F(EL,K,F:

1.Submit a request within 90 days.

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

Tech Hub

2026-09-09 Counterfeit Electronic Components: How to Detect, Authenticate, and Test Suspect Parts

Counterfeit components can hide behind convincing markings and passing basic function tests. This engineering reference covers source traceability, external inspection, X-ray, XRF, electrical testing, …

2026-09-08 Obsolete Electronic Components: How to Source and Evaluate Replacements

A practical engineering and sourcing framework covering lifecycle verification, lifetime-buy calculations, replacement qualification, supplier checks and counterfeit-risk controls.

2026-09-07 TTL vs CMOS Logic Levels: 74HC and 74HCT Compatibility Explained

TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.

2026-09-04 Logic Level Shifter: How to Connect 3.3V and 5V Logic Safely

A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.

2026-09-03 74HC595 vs TPIC6B595: Output Drive, Pinout, Current, and Load Selection

The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…

2026-09-02 74HC595 Pinout, Timing, Output Current, and Applications

The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…

2026-09-01 Latch vs Flip-Flop: Timing, Differences and Design Choices

A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…

2026-08-30 D Latch Circuit: Truth Table, Timing, ICs and Applications

A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …

2026-08-28 SR Latch Explained: NOR and NAND Circuits, Truth Tables, and Applications

An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…

2026-08-27 Latch Circuit: SR and D Latches, Truth Tables, Timing, and Applications

Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…