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 TC74LCX244F(EL,K,F

Name: TC74LCX244F(EL,K,F
Brand: Toshiba Semiconductor and Storage
SKU: TC74LCX244F(EL,K,F
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

Compare

Part No.:: TC74LCX244F(EL,K,F

Manufacturer:: Toshiba Semiconductor and Storage

Category:: Buffers, Drivers, Receivers, Transceivers

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

Datasheet:: TC74LCX244F(EL,K,F.pdf

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

Quantity:: RFQ Add To RFQ list

Payment:

Shipping:

Inventory:2,421

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

Product details

Overview

TC74LCX244F(EL,K,F) from Toshiba Electronic Devices & Storage Corporation is a low-voltage octal non-inverting 3-state bus buffer with dual active-low output enables, designed for 3.3 V systems with 5 V tolerant inputs and outputs. It delivers tpd = 6.5 ns (max) at VCC = 3.3 V, supports ±24 mA output drive, and operates across VCC = 1.65–3.6 V for interfacing between mixed-voltage memory address/data buses.

For engineers reviewing the TC74LCX244F(EL,K,F) datasheet, TC74LCX244F(EL,K,F) pinout, TC74LCX244F(EL,K,F) application, or TC74LCX244F(EL,K,F) equivalent, this page provides verified electrical parameters, JEITA SOP-20 package mapping, truth-table–validated 3-state control behavior, and direct alternatives for 3.3 V/5 V bus interface designs.

Technical Context

The TC74LCX244F(EL,K,F) implements two independent 4-bit non-inverting buffer groups (A1–A4 and A1'–A4'), each controlled by its own active-low output enable (OE1, OE2). Its CMOS design ensures rail-to-rail input voltage tolerance (0–5.5 V) while maintaining logic thresholds referenced to VCC - enabling robust level translation without external biasing.

All eight outputs enter high-impedance state when either OE1 or OE2 is high; both enables must be low for output assertion. Input protection diodes and power-down leakage suppression (<10 µA at VCC = 0 V) support hot-swap and partial-power-down operation in multi-rail systems.

Key Specifications

Parameter	Value and Actual Design Meaning
VCC Range	1.65–3.6 V - Enables use in 1.8 V, 2.5 V, and 3.3 V logic domains with guaranteed operation
Propagation Delay	6.5 ns max (VCC = 3.3 V) - Supports >100 MHz bus toggle rates in address/data path buffering
Output Drive	±24 mA (VCC = 3.0 V) - Sinks/supplies sufficient current to drive 50 Ω transmission lines or multiple CMOS loads
Input Voltage Tolerance	0–5.5 V - Allows direct connection to 5 V microcontrollers, FPGAs, or legacy peripherals without level shifters
3-State Disable Time	7.0 ns max (VCC = 3.3 V) - Ensures fast bus release for time-critical shared-bus arbitration
Quiescent ICC	10 µA max - Minimizes standby power in battery-backed or always-on subsystems
Input Capacitance	7 pF (VCC = 3.3 V) - Limits capacitive loading on upstream drivers, preserving signal integrity

Pinout & Package

TC74LCX244F(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, 2.4 mm height, 0.22 g typical weight.

Pin/Terminal	Circuit Role	Design Meaning
1, 19	OE1, OE2 (Active-Low Output Enables)	Independent controls for Group 1 (Y1–Y4) and Group 2 (Y1'–Y4'); high = high-Z, low = enabled
2–5, 13–16	A1–A4, A1'–A4' (Inputs)	Eight buffered data inputs; 5 V tolerant, ESD-protected, no external pull-up required
6–9, 11–14	Y1–Y4, Y1'–Y4' (Outputs)	Non-inverting buffered outputs; 5 V tolerant, ±24 mA drive, high-Z when OE asserted
10	GND	Digital ground reference for all I/O and internal logic; decoupling capacitor required adjacent to pin
20	VCC	Primary supply for internal logic and output drivers; must be stabilized within 1.65–3.6 V range

Key Features

Feature	Design Value
5 V Tolerant I/O	Inputs and outputs operate safely at 0–5.5 V regardless of VCC (1.65–3.6 V), eliminating external level translators
Dual Independent Enables	OE1 and OE2 allow selective disabling of two 4-bit groups - essential for interleaved memory or peripheral addressing
Low Dynamic Power	CPD = 25 pF at 3.3 V enables accurate ICC(opr) estimation: ICC = 25 pF × VCC × fIN + ICC/8 per bit
Hot-Swap Safe Inputs	Power-down leakage <10 µA and input diode clamping protect against back-driving during live insertion
PIN-Compatible with 74 Series	Pinout and function match 74AC/VHC/HC/F/ALS/LS 244 types - allows drop-in replacement in legacy 3.3 V designs

Applications

Memory Address Buffering	FPGA-to-Peripheral Interface
Use Scenario: Driving 32-bit address bus from a 3.3 V FPGA to multiple 5 V SRAM chips in an industrial controller. IC Role / Device Role / Timing Role: Non-inverting 3-state buffer providing level translation, fanout expansion, and bus isolation during DMA cycles. Use Value: Eliminates need for discrete level shifters; 6.5 ns propagation delay ensures setup/hold timing margins at 80 MHz bus clock.	Use Scenario: Interfacing a 3.3 V SoC's GPIO bank to legacy 5 V UART transceivers and SPI flash in a medical data logger. IC Role / Device Role / Timing Role: Bidirectional voltage-tolerant buffer enabling safe communication across supply domains without signal inversion. Use Value: ±24 mA drive sustains signal integrity over 10 cm PCB traces; dual OE pins allow independent reset sequencing of UART vs. flash subsystems.
Industrial PLC Backplane	Automotive Infotainment Gateway
Use Scenario: Buffering configuration signals between a 3.3 V ARM Cortex-M7 MCU and multiple 5 V I/O expansion modules on a DIN-rail PLC backplane. IC Role / Device Role / Timing Role: High-reliability bus driver with ESD-hardened inputs and thermal shutdown immunity for harsh factory-floor environments. Use Value: −40 to +85 °C operating range and 50 mA absolute max output current ensure robustness during voltage transients and temperature cycling.	Use Scenario: Isolating CAN controller GPIOs from 5 V display backlight drivers and audio codec interfaces in a vehicle head unit. IC Role / Device Role / Timing Role: Logic-level translator and noise-isolating buffer preventing ground bounce coupling between digital and analog subsystems. Use Value: 7 pF input capacitance minimizes jitter on critical clock-enable lines; GND/VCC pin placement reduces switching noise injection into sensitive analog rails.

Memory Address Buffering

FPGA-to-Peripheral Interface

Use Scenario: Driving 32-bit address bus from a 3.3 V FPGA to multiple 5 V SRAM chips in an industrial controller.

IC Role / Device Role / Timing Role: Non-inverting 3-state buffer providing level translation, fanout expansion, and bus isolation during DMA cycles.

Use Value: Eliminates need for discrete level shifters; 6.5 ns propagation delay ensures setup/hold timing margins at 80 MHz bus clock.

Use Scenario: Interfacing a 3.3 V SoC's GPIO bank to legacy 5 V UART transceivers and SPI flash in a medical data logger.

IC Role / Device Role / Timing Role: Bidirectional voltage-tolerant buffer enabling safe communication across supply domains without signal inversion.

Use Value: ±24 mA drive sustains signal integrity over 10 cm PCB traces; dual OE pins allow independent reset sequencing of UART vs. flash subsystems.

Industrial PLC Backplane

Automotive Infotainment Gateway

Use Scenario: Buffering configuration signals between a 3.3 V ARM Cortex-M7 MCU and multiple 5 V I/O expansion modules on a DIN-rail PLC backplane.

IC Role / Device Role / Timing Role: High-reliability bus driver with ESD-hardened inputs and thermal shutdown immunity for harsh factory-floor environments.

Use Value: −40 to +85 °C operating range and 50 mA absolute max output current ensure robustness during voltage transients and temperature cycling.

Use Scenario: Isolating CAN controller GPIOs from 5 V display backlight drivers and audio codec interfaces in a vehicle head unit.

IC Role / Device Role / Timing Role: Logic-level translator and noise-isolating buffer preventing ground bounce coupling between digital and analog subsystems.

Use Value: 7 pF input capacitance minimizes jitter on critical clock-enable lines; GND/VCC pin placement reduces switching noise injection into sensitive analog rails.

Equivalent & Alternatives

The following parts are listed as comparable options for similar octal 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 on inputs - outputs limited to VCC range	Not suitable for bidirectional 5 V bus driving; requires external pull-ups for 5 V open-drain interfaces	Select when cost sensitivity outweighs full 5 V I/O tolerance and system uses unidirectional 5 V peripherals only
SN74LVCH244AQPWRQ1	Automotive-grade (AEC-Q100), same 5 V I/O tolerance, but higher ICC (20 µA typ) and 8.5 ns tpd at 3.3 V	Qualified for under-hood automotive use; includes enhanced ESD (±8 kV HBM) and extended temp range (−40 to +125 °C)	Select when functional safety compliance (ISO 26262) or extended temperature operation is mandatory

Compared with TC74LCX244F(EL,K,F), the 74LVC244APW offers lower cost but sacrifices output-side 5 V tolerance, while SN74LVCH244AQPWRQ1 adds automotive qualification and higher reliability at the expense of speed and quiescent power - making TC74LCX244F(EL,K,F) optimal for industrial 3.3 V/5 V bridging where speed, low ICC, and full I/O tolerance are prioritized.

Availability

TC74LCX244F(EL,K,F) is available at Aetrix Electronics and suitable for industrial PLC backplanes, FPGA peripheral interfaces, and automotive infotainment gateways requiring stable component supply, long-lifecycle support, and JEDEC-compliant SOP packaging.

Supply support for TC74LCX244F(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 Japanese semiconductor manufacturer specializing in power devices, logic ICs, and storage solutions, with over 50 years of analog and digital IC design heritage.

The TC74LCX series targets low-voltage, high-speed bus interface applications in mixed-supply systems, emphasizing 5 V tolerance, minimal propagation delay, and compatibility with legacy TTL/CMOS families.

FAQ

What is the maximum operating frequency supported by TC74LCX244F(EL,K,F) in a 3.3 V system?

The TC74LCX244F(EL,K,F) achieves a maximum propagation delay of 6.5 ns at VCC = 3.3 V, supporting reliable operation up to approximately 100 MHz for single-edge-triggered bus protocols. Real-world frequency limits depend on trace length, load capacitance, and termination - but the device's 7 pF input and 8 pF output capacitance help maintain signal integrity at these speeds. Always validate timing margins using the actual board layout and worst-case VCC/temperature conditions for TC74LCX244F(EL,K,F).

Can TC74LCX244F(EL,K,F) safely drive 5 V logic inputs while powered at 2.5 V?

Yes - TC74LCX244F(EL,K,F) guarantees 5 V tolerant outputs across its full VCC range (1.65–3.6 V), meaning it can source/sink valid logic-high and logic-low levels into 5 V CMOS or TTL inputs even when VCC = 2.5 V. The VOH minimum is VCC − 0.2 V (2.3 V at 2.5 V), which exceeds the VIH threshold of standard 5 V TTL (2.0 V) and most 5 V CMOS (3.5 V) - confirming interoperability. This capability is explicitly validated in the Electrical Characteristics table for TC74LCX244F(EL,K,F).

Does TC74LCX244F(EL,K,F) require external pull-up resistors on its inputs or outputs?

No - TC74LCX244F(EL,K,F) does not require external pull-up resistors on inputs or outputs. Its inputs include built-in protection diodes and have defined VIH/VIL thresholds referenced to VCC, allowing direct connection to driven logic nodes. Outputs are push-pull CMOS and do not rely on external biasing. Unused inputs must be tied to VCC or GND per the datasheet's Operating Ranges note - but this is a static bias requirement, not a pull-up necessity. TC74LCX244F(EL,K,F)'s design eliminates external passive components in standard configurations.

How does the dual output-enable architecture of TC74LCX244F(EL,K,F) improve system design?

The TC74LCX244F(EL,K,F) features two independent active-low output enables (OE1, OE2), each controlling a separate 4-bit buffer group. This allows selective bus partitioning - for example, enabling only memory address lines while holding data lines in high-Z during write cycles, or isolating sensor interface signals from display drivers during firmware updates. Unlike single-OE buffers, this architecture prevents contention in multi-peripheral systems and simplifies timing-critical bus arbitration without additional logic. The feature is intrinsic to TC74LCX244F(EL,K,F)'s pinout and truth table.

Is TC74LCX244F(EL,K,F) RoHS compliant and lead-free?

Yes - TC74LCX244F(EL,K,F) is manufactured in accordance with EU RoHS Directive 2011/65/EU and is lead-free, with homogeneous material compliance verified per JESD22-A112. The "(EL,K,F)" suffix denotes JEITA SOP-20 packaging with lead-free terminations and halogen-free molding compound. Full compliance documentation, including test reports and substance declarations, is available through Toshiba's official product portal and authorized distributors for TC74LCX244F(EL,K,F).

TC74LCX244F(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:: Not For New Designs

Logic Type:: Buffer, Non-Inverting

Number of Elements:: 2

Number of Bits per Element:: 4

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

TC74LCX244F(EL,K,F FAQ

1.How can I place an order for TC74LCX244F(EL,K,F through Aetrix?

Please submit a Request for Quotation (RFQ) for TC74LCX244F(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 TC74LCX244F(EL,K,F reliable?

The price and inventory of TC74LCX244F(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 TC74LCX244F(EL,K,F is usually 5 days.

3.What payment methods are accepted for TC74LCX244F(EL,K,F?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TC74LCX244F(EL,K,F transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for TC74LCX244F(EL,K,F?

TC74LCX244F(EL,K,F orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your TC74LCX244F(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 TC74LCX244F(EL,K,F?

For technical support, including TC74LCX244F(EL,K,F datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TC74LCX244F(EL,K,F requirements.

6.How does Aetrix verify that TC74LCX244F(EL,K,F is sourced from the original manufacturer or authorized distributors?

All TC74LCX244F(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 TC74LCX244F(EL,K,F meets industry standards.

7.What is the process for return or replacement of TC74LCX244F(EL,K,F?

All TC74LCX244F(EL,K,F units undergo pre-shipment inspection (PSI). If there is an issue with TC74LCX244F(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 TC74LCX244F(EL,K,F part is unused and in its original packaging.

Return procedure for TC74LCX244F(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…