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

Texas Instruments 74FCT2244ATSOCTE4

Name: 74FCT2244ATSOCTE4
Brand: Texas Instruments
SKU: 74FCT2244ATSOCTE4
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74FCT2244ATSOCTE4

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 20-SOIC (0.295", 7.50mm Width)

Datasheet:: 74FCT2244ATSOCTE4.pdf

Description:: IC BUF NON-INVERT 5.25V 20SOIC

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Product details

Overview

74FCT2244ATSOCTE4 from Texas Instruments is an octal noninverting 3-state buffer/line driver with on-chip 25-Ω series output resistors, TTL-compatible input/output levels, and I_off support for partial-power-down operation. It delivers 15-mA source / 12-mA sink drive strength, 4.8-ns typical propagation delay (t_PLH/t_PHL), and operates across –40°C to +85°C. It is used in memory address buffering, clock distribution, and bus transceiver applications requiring noise-suppressed signal integrity.

For engineers reviewing the 74FCT2244ATSOCTE4 datasheet, 74FCT2244ATSOCTE4 pinout, 74FCT2244ATSOCTE4 application, or 74FCT2244ATSOCTE4 equivalent, key selection criteria include its 25-Ω integrated output termination, edge-rate control for EMI reduction, I_off-enabled hot-swap capability, and SOIC-20 package compatibility with legacy FCT logic families.

Technical Context

This device implements dual independent 4-bit noninverting buffers, each controlled by a separate 3-state enable (OEA/OEB). Its edge-rate control circuitry limits slew rate to suppress transmission-line reflections without external components. The 25-Ω on-die series resistors are placed at each output terminal, directly reducing standing-wave noise in high-speed PCB traces.

The I_off feature actively disables outputs when V_CC = 0 V, blocking reverse current flow up to ±1 µA - enabling safe back-driving during partial power-down. Input thresholds (V_IL = 0.8 V, V_VIH = 2.0 V) and output swing (V_OL ≤ 0.55 V at 12 mA, V_OH ≥ 2.4 V at –15 mA) ensure full interoperability with TTL, CMOS, and NMOS logic families.

Key Specifications

Parameter	Value and Actual Design Meaning
Propagation Delay	4.8 ns max (t_PLH/t_PHL), enabling reliable operation in 100-MHz bus systems with margin.
Output Drive	15 mA source / 12 mA sink, sufficient to drive 50-Ω transmission lines or fan-out to 20+ TTL loads.
On-Chip Termination	25 Ω series resistor per output, eliminating need for discrete termination resistors and saving PCB area.
I_off Current	±1 µA at V_CC = 0 V, preventing damaging back-current during hot-insertion or mixed-voltage domain interfacing.
Operating Temperature	–40°C to +85°C, qualified for industrial-grade embedded control and communications equipment.
Supply Voltage	4.75 V to 5.25 V, tightly regulated to maintain consistent timing and noise immunity in 5-V systems.
ESD Protection	2000-V HBM, 200-V MM, 1000-V CDM - exceeds JEDEC JESD22 standards for board-level handling robustness.

Pinout & Package

74FCT2244ATSOCTE4 is housed in a 20-pin SOIC (DW) package, 7.5 mm wide, with standard 0.050″ (1.27 mm) lead pitch and RoHS-compliant CU NIPDAU finish. Moisture Sensitivity Level is Level-1 (260°C peak reflow, unlimited floor life).

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3, 4, 5, 6, 7, 8	Data Inputs (DA0–DA3, DB0–DB3)	Noninverting inputs for two independent 4-bit channels; accept TTL/CMOS logic levels.
9	GND	Ground reference for all internal circuitry and output drivers.
10, 11, 12, 13, 14, 15, 16, 17	Outputs (OA0–OA3, OB0–OB3)	3-state buffered outputs with integrated 25-Ω series termination; drive buses or transmission lines directly.
18	OEB	Active-low enable for second 4-bit channel (OB0–OB3); controls output impedance state.
19	V_CC	5-V supply input; decoupling capacitor required near pin for stable switching performance.
20	OEA	Active-low enable for first 4-bit channel (OA0–OA3); independent of OEB for flexible bus partitioning.

Key Features

Feature	Design Value
Integrated 25-Ω Output Resistors	Eliminates external termination components, reduces PCB trace reflections, and improves signal integrity in >25-MHz digital interfaces.
Edge-Rate Controlled Outputs	Slower, controlled slew rate minimizes simultaneous switching noise (SSN) and radiated emissions without sacrificing speed.
I_off Partial-Power-Down Support	Enables live insertion/removal in backplane or modular systems by blocking reverse current when V_CC is unpowered.
TTL-Compatible I/O Levels	Direct interface with legacy 5-V TTL, NMOS, and CMOS without level-shifting circuitry or pull-up resistors.
High-Noise Immunity	0.2-V input hysteresis (V_hys) and robust ESD protection reduce susceptibility to ground bounce and transient coupling.

Applications

Memory Address Buffering	Industrial Bus Transceiver
Use Scenario: Driving address lines from a microcontroller to multiple SRAM or flash memory devices on a shared bus. IC Role / Device Role / Timing Role: Noninverting buffer with 3-state control isolates memory banks and prevents bus contention during chip select transitions. Use Value: Integrated 25-Ω termination suppresses ringing on long address traces, ensuring setup/hold timing margins remain intact at 20-MHz access rates.	Use Scenario: Bidirectional data transfer between a PLC CPU and field I/O modules over a 1-meter ribbon cable. IC Role / Device Role / Timing Role: Line driver/receiver with independent OEA/OEB enables half-duplex bus arbitration and direction control. Use Value: Edge-rate control and low-output-impedance drive reduce crosstalk and overshoot, maintaining signal fidelity across noisy factory environments.
Legacy System Clock Distribution	Hot-Swappable Backplane Interface
Use Scenario: Distributing a 10-MHz system clock from a crystal oscillator to multiple ASICs on a multi-layer PCB. IC Role / Device Role / Timing Role: Low-skew buffer with matched t_PLH/t_PHL ensures synchronous clock arrival across fan-out branches. Use Value: 4.8-ns max propagation delay and <0.5-ns channel-to-channel skew preserve timing budget in synchronous logic designs.	Use Scenario: Interfacing a hot-pluggable peripheral card to a powered-backplane motherboard using shared data/address lines. IC Role / Device Role / Timing Role: 3-state buffer with I_off prevents backfeeding into unpowered card circuitry during insertion. Use Value: ±1 µA I_off current ensures no damage to either card or backplane during live insertion, meeting IEC 61000-4-2 compliance requirements.

Memory Address Buffering

Industrial Bus Transceiver

Use Scenario: Driving address lines from a microcontroller to multiple SRAM or flash memory devices on a shared bus.

IC Role / Device Role / Timing Role: Noninverting buffer with 3-state control isolates memory banks and prevents bus contention during chip select transitions.

Use Value: Integrated 25-Ω termination suppresses ringing on long address traces, ensuring setup/hold timing margins remain intact at 20-MHz access rates.

Use Scenario: Bidirectional data transfer between a PLC CPU and field I/O modules over a 1-meter ribbon cable.

IC Role / Device Role / Timing Role: Line driver/receiver with independent OEA/OEB enables half-duplex bus arbitration and direction control.

Use Value: Edge-rate control and low-output-impedance drive reduce crosstalk and overshoot, maintaining signal fidelity across noisy factory environments.

Legacy System Clock Distribution

Hot-Swappable Backplane Interface

Use Scenario: Distributing a 10-MHz system clock from a crystal oscillator to multiple ASICs on a multi-layer PCB.

IC Role / Device Role / Timing Role: Low-skew buffer with matched t_PLH/t_PHL ensures synchronous clock arrival across fan-out branches.

Use Value: 4.8-ns max propagation delay and <0.5-ns channel-to-channel skew preserve timing budget in synchronous logic designs.

Use Scenario: Interfacing a hot-pluggable peripheral card to a powered-backplane motherboard using shared data/address lines.

IC Role / Device Role / Timing Role: 3-state buffer with I_off prevents backfeeding into unpowered card circuitry during insertion.

Use Value: ±1 µA I_off current ensures no damage to either card or backplane during live insertion, meeting IEC 61000-4-2 compliance requirements.

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
CY74FCT2244CTSOCTE4	4.1-ns max propagation delay; lower t_PLH/t_PHL than 74FCT2244ATSOCTE4's 4.8 ns.	Better suited for higher-frequency bus timing budgets where sub-5-ns delay is critical.	Select when maximum speed is prioritized over cost or legacy design compatibility.
SN74FCT2244ATSOCTE4	Same speed grade and pinout; identical electrical specs but different TI branding prefix (CY vs SN).	No functional difference; used interchangeably in TI's documentation and packaging.	Valid drop-in replacement if CY-prefix parts are unavailable; verify top-side marking matches BOM.

Compared with CY74FCT2244CTSOCTE4, the 74FCT2244ATSOCTE4 trades 0.7 ns of speed for broader voltage tolerance margin and legacy FCT-family consistency; versus SN74FCT2244ATSOCTE4, it is functionally identical but reflects TI's historical CY-series nomenclature for military/industrial variants.

Availability

74FCT2244ATSOCTE4 is available at Aetrix Electronics and suitable for industrial control systems, legacy 5-V bus architectures, and hot-swap-capable backplane designs requiring stable component supply and long-term obsolescence management.

Supply support for 74FCT2244ATSOCTE4 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

Texas Instruments is a global semiconductor company headquartered in Dallas, Texas, delivering analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.

The 74FCT2244ATSOCTE4 belongs to TI's FCT logic family - designed specifically for high-speed, low-noise 5-V digital interfacing with integrated termination and robust power-down behavior.

FAQ

What is the maximum operating frequency supported by the 74FCT2244ATSOCTE4?

The 74FCT2244ATSOCTE4 does not specify a maximum clock frequency, but its 4.8-ns maximum propagation delay supports reliable operation in digital systems with signal periods ≥10 ns - corresponding to effective bus frequencies up to 100 MHz under controlled trace impedance and load conditions. Actual usable frequency depends on PCB layout, termination, and capacitive loading.

Does the 74FCT2244ATSOCTE4 require external pull-up or pull-down resistors on its enable pins?

No, the 74FCT2244ATSOCTE4 does not require external pull-up or pull-down resistors on OEA or OEB. Its inputs are TTL-compatible with defined V_IL (≤0.8 V) and V_IH (≥2.0 V) thresholds; unused enables should be tied directly to V_CC (for disable) or GND (for enable) per TI's recommended operating conditions to prevent floating states.

Can the 74FCT2244ATSOCTE4 be used in mixed-voltage systems with 3.3-V controllers?

Yes, the 74FCT2244ATSOCTE4 accepts 3.3-V logic-high inputs reliably because its V_IH threshold is only 2.0 V (min), well below 3.3 V. However, its outputs swing to 2.4 V min (at –15 mA), which may fall below the V_IH requirement of some 3.3-V receivers; verify compatibility with downstream device specifications before deployment.

What is the thermal resistance (θ_JA) of the 74FCT2244ATSOCTE4 in its SOIC package?

The 74FCT2244ATSOCTE4 in SOIC (DW) package has a junction-to-ambient thermal resistance (θ_JA) of 58°C/W, as specified in TI's absolute maximum ratings. This value assumes standard JEDEC 2-layer board conditions; actual thermal performance improves with added copper pour, thermal vias, or airflow.

Is the 74FCT2244ATSOCTE4 RoHS compliant and lead-free?

Yes, the 74FCT2244ATSOCTE4 is RoHS compliant and lead-free. Its eco plan is "Green (RoHS & no Sb/Br)", with CU NIPDAU lead finish and JEDEC MSL Level-1 rating (260°C peak reflow, unlimited floor life), confirming full compliance with EU Directive 2011/65/EU and related restrictions on hazardous substances.

74FCT2244ATSOCTE4 Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74FCT

Package/Case:: 20-SOIC (0.295", 7.50mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

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:: 15mA, 12mA

Voltage - Supply:: 4.75V ~ 5.25V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 20-SOIC

74FCT2244ATSOCTE4 FAQ

1.How can I place an order for 74FCT2244ATSOCTE4 through Aetrix?

Please submit a Request for Quotation (RFQ) for 74FCT2244ATSOCTE4 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 74FCT2244ATSOCTE4 reliable?

The price and inventory of 74FCT2244ATSOCTE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74FCT2244ATSOCTE4 is usually 5 days.

3.What payment methods are accepted for 74FCT2244ATSOCTE4?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74FCT2244ATSOCTE4 transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74FCT2244ATSOCTE4?

74FCT2244ATSOCTE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74FCT2244ATSOCTE4 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 74FCT2244ATSOCTE4?

For technical support, including 74FCT2244ATSOCTE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74FCT2244ATSOCTE4 requirements.

6.How does Aetrix verify that 74FCT2244ATSOCTE4 is sourced from the original manufacturer or authorized distributors?

All 74FCT2244ATSOCTE4 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 74FCT2244ATSOCTE4 meets industry standards.

7.What is the process for return or replacement of 74FCT2244ATSOCTE4?

All 74FCT2244ATSOCTE4 units undergo pre-shipment inspection (PSI). If there is an issue with 74FCT2244ATSOCTE4, 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 74FCT2244ATSOCTE4 part is unused and in its original packaging.

Return procedure for 74FCT2244ATSOCTE4:

1.Submit a request within 90 days.

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

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