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 TC74LCX244FT(EL)

Name: TC74LCX244FT(EL)
Brand: Toshiba Semiconductor and Storage
SKU: TC74LCX244FT(EL)
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: TC74LCX244FT(EL)

Manufacturer:: Toshiba Semiconductor and Storage

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 20-TSSOP (0.173", 4.40mm Width)

Datasheet:: TC74LCX244FT(EL).pdf

Description:: IC BUFF/DVR DUAL LV 20TSSOP

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:4,195

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

Product details

Overview

TC74LCX244FT(EL) from Toshiba Electronic Devices & Storage Corporation is a non-inverting octal 3-state bus buffer with dual active-low output enables, designed for 3.3-V logic systems interfacing to 5-V environments. It operates from 1.65 V to 3.6 V, delivers 6.5 ns max propagation delay at 3.3 V, and supports ±24 mA output drive. Used in memory address driver circuits and low-voltage bus isolation.

For engineers reviewing the TC74LCX244FT(EL) datasheet, TC74LCX244FT(EL) pinout, TC74LCX244FT(EL) application, or TC74LCX244FT(EL) equivalent, key selection criteria include 5-V tolerant I/O, 3.3-V supply compatibility, dual OE control, high-speed 3-state switching, and JEITA SOP-20 package footprint.

Technical Context

The TC74LCX244FT(EL) implements two independent 4-bit non-inverting buffers, each controlled by its own active-low output enable (OE1, OE2). All inputs and outputs tolerate up to 5.5 V regardless of VCC, enabling safe level translation between 3.3-V logic and legacy 5-V buses.

It features power-down protection on all pins, input leakage ≤±5 µA, and off-state output current ≤±5 µA. Propagation delay (tpLH/tpHL) is guaranteed at 6.5 ns max under VCC = 3.3 V ±0.3 V, CL = 50 pF, and tr/tf = 2.5 ns.

Key Specifications

Parameter	Value and Actual Design Meaning
VCC Range	1.65 V to 3.6 V - Enables operation in modern low-voltage systems while maintaining backward compatibility with 3.3-V infrastructure.
Propagation Delay	6.5 ns max (VCC = 3.3 V) - Supports high-speed data transfer in address/data bus applications up to ~150 MHz effective toggle rate.
Output Drive	±24 mA (VCC = 3.0 V) - Sufficient to drive multiple CMOS loads or terminate short PCB traces without external buffering.
I/O Voltage Tolerance	0 V to 5.5 V - Allows direct connection to 5-V peripherals without level shifters, simplifying mixed-voltage system design.
Input Capacitance	7 pF (VCC = 3.3 V) - Minimizes capacitive loading on upstream drivers, preserving signal integrity in fan-out-critical paths.
Quiescent ICC	≤10 µA - Reduces static power consumption in battery-backed or always-on subsystems.

Pinout & Package

TC74LCX244FT(EL) is packaged in JEITA-standard SOP-20 (Small Outline Package, 20-pin, 1.27 mm pitch), pin-compatible with industry-standard 74-series octal buffers. The package is RoHS-compliant and rated for industrial temperature range (−40°C to +85°C).

Pin/Terminal	Circuit Role	Design Meaning
1, 19	OE1, OE2 (Active-Low)	Independent enables for Group 1 (pins 2–5, 11–14) and Group 2 (pins 6–9, 15–18); asserted low disables respective outputs to high-impedance state.
2–5, 11–14	A1–A4 (Inputs), Y1–Y4 (Outputs) - Group 1	Non-inverting buffered path: A1→Y1, A2→Y2, etc.; used for one 4-bit bus segment.
6–9, 15–18	A1–A4 (Inputs), Y1–Y4 (Outputs) - Group 2	Second independent 4-bit non-inverting buffer group, electrically isolated from Group 1 except shared VCC/GND.
10	GND	Ground reference for all logic and I/O; must be low-impedance connection to minimize noise coupling.
20	VCC	Primary power supply (1.65–3.6 V); decoupling capacitor (0.1 µF ceramic) required near this pin.

Key Features

Feature	Design Value
5-V tolerant I/O	Enables seamless interface between 3.3-V microcontrollers and legacy 5-V peripherals without external level translators.
Dual independent 3-state controls	Allows selective isolation of two 4-bit data paths-critical for bidirectional bus arbitration and memory-mapped peripheral multiplexing.
Low dynamic power dissipation	CPD = 25 pF at 3.3 V enables predictable power estimation: ICC(opr) ≈ 25 pF × 3.3 V × fIN + ICC/8 per bit.
ESD-protected inputs	All inputs include built-in protection against ≥2 kV HBM discharge, reducing need for external TVS components in board-level ESD mitigation.
Pin- and function-compatible with 74AC/VHC/HC series	Direct drop-in replacement for legacy 74244 designs, accelerating migration to lower-voltage operation without layout changes.

Applications

Memory Address Buffering	Industrial I/O Expansion
Use Scenario: Driving 16-bit address lines from a 3.3-V microcontroller to external SRAM or flash memory operating at 5-V or mixed voltage. IC Role / Device Role / Timing Role: Non-inverting 3-state buffer providing voltage-tolerant, low-skew address propagation with independent group enables for memory bank selection. Use Value: Eliminates need for discrete level shifters; 6.5 ns delay ensures setup/hold timing margins are preserved across full temperature range.	Use Scenario: Isolating programmable logic controller (PLC) CPU bus from field-side 5-V digital I/O modules. IC Role / Device Role / Timing Role: Bidirectional bus isolator with dual OE control, allowing CPU to selectively enable/disable groups of I/O lines during configuration or fault recovery. Use Value: Prevents back-driving during hot-swap events; ±24 mA drive sustains signal integrity over 10 cm PCB traces at 10 MHz.
Embedded System Bus Arbitration	Legacy Peripheral Interface
Use Scenario: Sharing a common data bus among multiple 3.3-V peripherals (e.g., ADC, DAC, EEPROM) in an automotive body control module. IC Role / Device Role / Timing Role: Octal 3-state buffer acting as bus transceiver with group-selectable enable, synchronized to system clock domain. Use Value: Dual OE pins allow time-multiplexed access without contention; 7 pF input capacitance minimizes loading on master controller outputs.	Use Scenario: Interfacing a modern ARM Cortex-M3 microcontroller (3.3-V I/O) to legacy 5-V UART transceivers or LCD controllers. IC Role / Device Role / Timing Role: Level-translating buffer ensuring reliable logic-level recognition and drive strength compliance on both sides of the interface. Use Value: 5.5-V input tolerance prevents damage during power sequencing mismatches; guaranteed VOL ≤0.55 V at 24 mA ensures clean low-level signaling to 5-V receivers.

Memory Address Buffering

Industrial I/O Expansion

Use Scenario: Driving 16-bit address lines from a 3.3-V microcontroller to external SRAM or flash memory operating at 5-V or mixed voltage.

IC Role / Device Role / Timing Role: Non-inverting 3-state buffer providing voltage-tolerant, low-skew address propagation with independent group enables for memory bank selection.

Use Value: Eliminates need for discrete level shifters; 6.5 ns delay ensures setup/hold timing margins are preserved across full temperature range.

Use Scenario: Isolating programmable logic controller (PLC) CPU bus from field-side 5-V digital I/O modules.

IC Role / Device Role / Timing Role: Bidirectional bus isolator with dual OE control, allowing CPU to selectively enable/disable groups of I/O lines during configuration or fault recovery.

Use Value: Prevents back-driving during hot-swap events; ±24 mA drive sustains signal integrity over 10 cm PCB traces at 10 MHz.

Embedded System Bus Arbitration

Legacy Peripheral Interface

Use Scenario: Sharing a common data bus among multiple 3.3-V peripherals (e.g., ADC, DAC, EEPROM) in an automotive body control module.

IC Role / Device Role / Timing Role: Octal 3-state buffer acting as bus transceiver with group-selectable enable, synchronized to system clock domain.

Use Value: Dual OE pins allow time-multiplexed access without contention; 7 pF input capacitance minimizes loading on master controller outputs.

Use Scenario: Interfacing a modern ARM Cortex-M3 microcontroller (3.3-V I/O) to legacy 5-V UART transceivers or LCD controllers.

IC Role / Device Role / Timing Role: Level-translating buffer ensuring reliable logic-level recognition and drive strength compliance on both sides of the interface.

Use Value: 5.5-V input tolerance prevents damage during power sequencing mismatches; guaranteed VOL ≤0.55 V at 24 mA ensures clean low-level signaling to 5-V receivers.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
74LVC244APW,118	Lower VCC min (1.65 V same), but only 5-V tolerant inputs (not outputs); tpd = 5.6 ns max at 3.3 V.	Requires external clamping or pull-ups for 5-V output termination; unsuitable where bidirectional 5-V bus driving is needed.	Select when only input-level translation is required and higher speed justifies tighter timing margin control.
SN74LVCH244AQPWRQ1	Automotive-grade (AEC-Q100), 3.6-V max VCC, 5-V tolerant I/O, tpd = 6.6 ns max at 3.3 V, higher ICC (20 µA quiescent).	Qualified for automotive under-hood use; includes enhanced ESD (±8 kV HBM) and extended temperature range (−40°C to +125°C).	Select for automotive applications requiring qualification; otherwise over-specified for industrial/commercial use.

Compared with 74LVC244APW,118 and SN74LVCH244AQPWRQ1, the TC74LCX244FT(EL) uniquely combines true 5-V tolerant inputs *and* outputs in a commercial-grade SOP-20 package with proven long-term availability since 1994, making it optimal for cost-sensitive, mixed-voltage industrial control designs where automotive qualification is unnecessary.

Availability

TC74LCX244FT(EL) is available at Aetrix Electronics and suitable for memory address buffering, industrial I/O expansion, embedded bus arbitration, and legacy peripheral interface applications requiring stable component supply and long-lifecycle support.

Supply support for TC74LCX244FT(EL) 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 discrete semiconductors, power devices, and logic ICs for industrial, consumer, and automotive markets.

The TC74LCX series targets low-voltage, high-speed CMOS logic applications requiring 5-V tolerance and compatibility with legacy 74-series footprints, emphasizing interoperability and long-term supply stability.

FAQ

What is the maximum operating voltage for TC74LCX244FT(EL) inputs and outputs?

The TC74LCX244FT(EL) supports DC input and output voltages from −0.5 V to 5.5 V regardless of VCC level, enabling robust interfacing with 5-V systems while powered from 1.65–3.6 V. This 5-V tolerance applies to both high- and low-state conditions and is validated per Toshiba's Absolute Maximum Ratings table.

Does TC74LCX244FT(EL) require external pull-up resistors on its outputs?

No, TC74LCX244FT(EL) does not require external pull-up resistors on its outputs when used within its specified operating conditions. Its outputs actively drive both logic high and low states with ±24 mA capability at VCC = 3.0 V, and maintain valid VOH/VOL levels across the full load range without external biasing.

Can TC74LCX244FT(EL) be used in a 2.5-V supply system?

Yes, TC74LCX244FT(EL) is fully specified for VCC = 2.5 V (within 1.65–3.6 V range). At 2.5 V, propagation delay is ≤8.5 ns max, output drive is ≥±12 mA, and VIH/VIL thresholds scale appropriately (VIH ≥ 2.0 V, VIL ≤ 0.7 V), ensuring reliable operation in 2.5-V logic domains.

Is TC74LCX244FT(EL) pin-compatible with standard 74HC244 devices?

Yes, TC74LCX244FT(EL) is pin- and function-compatible with 74HC244, 74AC244, and 74VHC244 devices in SOP-20 package. Pin assignments, truth table behavior, and dual-OE architecture match exactly-enabling direct replacement in existing layouts without redesign.

What is the thermal performance of TC74LCX244FT(EL) in continuous operation?

TC74LCX244FT(EL) has a maximum power dissipation of 180 mW and operates reliably from −40°C to +85°C. Its typical junction-to-ambient thermal resistance (θJA) for SOP-20 is ~120°C/W; at 24 mA output load and 3.3 V supply, junction temperature rise remains below 25°C above ambient under standard PCB conditions, supporting stable long-term operation.

TC74LCX244FT(EL) Specifications

Product attributes: Attribute value

Manufacturer:: Toshiba Semiconductor and Storage

Series:: 74LCX

Package/Case:: 20-TSSOP (0.173", 4.40mm Width)

Packaging:: Digi-Reel®

Product Status:: Obsolete

Logic Type:: Buffer, Non-Inverting

Number of Elements:: 2

Number of Bits per Element:: 4

Input Type:: -

Output Type:: -

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-TSSOP

TC74LCX244FT(EL) FAQ

1.How can I place an order for TC74LCX244FT(EL) through Aetrix?

Please submit a Request for Quotation (RFQ) for TC74LCX244FT(EL) 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 TC74LCX244FT(EL) reliable?

The price and inventory of TC74LCX244FT(EL) are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TC74LCX244FT(EL) is usually 5 days.

3.What payment methods are accepted for TC74LCX244FT(EL)?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC74LCX244FT(EL) transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TC74LCX244FT(EL)?

TC74LCX244FT(EL) orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TC74LCX244FT(EL) 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 TC74LCX244FT(EL)?

For technical support, including TC74LCX244FT(EL) datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC74LCX244FT(EL) requirements.

6.How does Aetrix verify that TC74LCX244FT(EL) is sourced from the original manufacturer or authorized distributors?

All TC74LCX244FT(EL) 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 TC74LCX244FT(EL) meets industry standards.

7.What is the process for return or replacement of TC74LCX244FT(EL)?

All TC74LCX244FT(EL) units undergo pre-shipment inspection (PSI). If there is an issue with TC74LCX244FT(EL), 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 TC74LCX244FT(EL) part is unused and in its original packaging.

Return procedure for TC74LCX244FT(EL):

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…