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

Texas Instruments 74ACT11244PW

Name: 74ACT11244PW
Brand: Texas Instruments
SKU: 74ACT11244PW
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74ACT11244PW

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 24-TSSOP (0.173", 4.40mm Width)

Datasheet:: 74ACT11244PW.pdf

Description:: IC BUFF NON-INVERT 5.5V 24TSSOP

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Product details

Overview

74ACT11244PW from Texas Instruments is an octal noninverting 3-state buffer/line driver in a 24-pin TSSOP package, designed for memory address driving and bus interfacing with TTL-compatible inputs, 5-V supply operation (4.5–5.5 V), ±24-mA output drive, and propagation delays as low as 1.5 ns. It supports industrial temperature range (−40°C to 85°C) and features flow-through pinout for optimized PCB layout.

For engineers reviewing the 74ACT11244PW datasheet, 74ACT11244PW pinout, 74ACT11244PW application, or 74ACT11244PW equivalent, key selection criteria include 3-state bus-driving capability, TTL-level input compatibility, low propagation delay, high noise immunity (500-mA latch-up rating), and TSSOP-24 packaging for space-constrained digital systems.

Technical Context

The 74ACT11244PW implements two independent 4-bit noninverting buffers, each with dedicated 3-state enable (1OE, 2OE), supporting simultaneous or staggered bus control. Its EPIC (Enhanced-Performance Implanted CMOS) 1-µm process enables fast switching while maintaining TTL voltage compatibility at the inputs.

Center-placed VCC and GND pins minimize high-speed switching noise; the flow-through architecture aligns inputs on one side and outputs on the opposite side, reducing trace crossovers. Absolute maximum ratings include 6-V supply tolerance and ±50-mA output clamp current, ensuring robustness against transient overvoltage conditions.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	4.5 V to 5.5 V - Ensures stable operation across standard 5-V logic rails with margin for ripple and drop.
Output Drive	±24 mA - Sufficient to drive multiple TTL loads or terminate short stubs on parallel buses without external buffering.
Propagation Delay	1.5 ns (min), 9.9 ns (max) - Enables high-speed address/data path timing in 20+ MHz memory and peripheral interfaces.
Input Compatibility	TTL-voltage level (VIH = 2 V, VIL = 0.8 V) - Directly interfaces legacy TTL logic without level-shifting circuitry.
Operating Temperature	−40°C to +85°C - Qualified for industrial-grade embedded control, instrumentation, and communications equipment.
Power Dissipation	0.7 W (PW package, TA = 55°C) - Matches thermal limits of compact TSSOP layouts with standard PCB copper area.
Latch-Up Immunity	500 mA at 125°C - Exceeds JEDEC JESD78 requirements, enabling reliable operation in noisy or thermally stressed environments.

Pinout & Package

TSSOP-24 (PW) package: 7.8 mm × 4.4 mm, 1.2 mm max height, lead pitch 0.65 mm, exposed metal not present, RoHS-compliant NIPDAU finish, MSL Level-1 (260°C peak reflow).

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3, 4	1Y1–1Y4	Noninverting buffered outputs of first quad channel; 3-state controlled by 1OE.
9–12	2Y1–2Y4	Noninverting buffered outputs of second quad channel; 3-state controlled by 2OE.
22–24, 1	1A1–1A4	Inputs to first quad buffer; flow-through layout places them adjacent to corresponding outputs.
16–14, 13	2A1–2A4	Inputs to second quad buffer; mirrored placement enables symmetrical routing on dense PCBs.
20, 17	1OE, 2OE	Active-low enables - independent control allows interleaved bus access or power-gating of channel pairs.
8, 15, 18, 19	GND	Four dedicated ground pins - reduce ground bounce and improve signal integrity in high-speed switching.
11, 21	VCC	Two center-placed VCC pins - lower inductance supply path and balanced current distribution across die.

Key Features

Feature	Design Value
Flow-through pinout	Input-to-output alignment minimizes layer transitions and via count, reducing signal skew and EMI in high-density layouts.
Center VCC/GND configuration	Dual VCC and quadruple GND pins suppress simultaneous switching noise (SSN) critical for clean bus signaling.
EPIC CMOS process	1-µm geometry delivers ACT-series speed/power balance: faster than LS-TTL, lower power than F-series, with rail-to-rail noise margins.
TTL-compatible inputs	Accepts standard TTL VOH/VOL thresholds directly - eliminates need for external biasing or level translators in mixed-logic systems.
3-state output control	Independent OE pins per 4-bit group allow partial bus arbitration, dynamic load segmentation, and hot-swap-safe I/O isolation.

Applications

Memory Address Buffering	Parallel Bus Transceiver Interface
Use Scenario: Driving 16-bit address lines from a microcontroller to SRAM or Flash memory in an industrial PLC. IC Role / Device Role / Timing Role: Noninverting 3-state buffer isolating CPU address bus from memory array; enables shared bus access with DMA controllers. Use Value: Propagation delay ≤9.9 ns ensures setup/hold compliance at 20-MHz bus clocks; TTL-compatible inputs accept MCU GPIO levels directly.	Use Scenario: Bidirectional data path conditioning between FPGA and legacy parallel peripherals (e.g., LCD controller, printer interface). IC Role / Device Role / Timing Role: Octal line driver with independent enables manages direction-controlled data latching and bus contention avoidance. Use Value: Independent 1OE/2OE pins allow staggered enable timing to prevent bus glitches during direction changes.
Industrial I/O Expansion Module	Test Equipment Signal Conditioning
Use Scenario: Isolating and strengthening digital control signals (e.g., relay drivers, sensor read-enable) in modular DAQ hardware. IC Role / Device Role / Timing Role: Robust 3-state buffer providing noise-immune signal translation between isolated logic domains and field-side drivers. Use Value: 500-mA latch-up immunity and −40°C to +85°C rating ensure reliability in electrically harsh factory-floor environments.	Use Scenario: Driving calibrated timing waveforms to DUT inputs in automated test fixtures requiring precise edge fidelity. IC Role / Device Role / Timing Role: Low-skew buffer preserving rise/fall time integrity (<10 ns) across all eight channels under loaded conditions. Use Value: Matched tPLH/tPHL (1.5–9.2 ns) and low output capacitance (10 pF) maintain waveform fidelity up to 50-MHz fundamental frequencies.

Memory Address Buffering

Parallel Bus Transceiver Interface

Use Scenario: Driving 16-bit address lines from a microcontroller to SRAM or Flash memory in an industrial PLC.

IC Role / Device Role / Timing Role: Noninverting 3-state buffer isolating CPU address bus from memory array; enables shared bus access with DMA controllers.

Use Value: Propagation delay ≤9.9 ns ensures setup/hold compliance at 20-MHz bus clocks; TTL-compatible inputs accept MCU GPIO levels directly.

Use Scenario: Bidirectional data path conditioning between FPGA and legacy parallel peripherals (e.g., LCD controller, printer interface).

IC Role / Device Role / Timing Role: Octal line driver with independent enables manages direction-controlled data latching and bus contention avoidance.

Use Value: Independent 1OE/2OE pins allow staggered enable timing to prevent bus glitches during direction changes.

Industrial I/O Expansion Module

Test Equipment Signal Conditioning

Use Scenario: Isolating and strengthening digital control signals (e.g., relay drivers, sensor read-enable) in modular DAQ hardware.

IC Role / Device Role / Timing Role: Robust 3-state buffer providing noise-immune signal translation between isolated logic domains and field-side drivers.

Use Value: 500-mA latch-up immunity and −40°C to +85°C rating ensure reliability in electrically harsh factory-floor environments.

Use Scenario: Driving calibrated timing waveforms to DUT inputs in automated test fixtures requiring precise edge fidelity.

IC Role / Device Role / Timing Role: Low-skew buffer preserving rise/fall time integrity (<10 ns) across all eight channels under loaded conditions.

Use Value: Matched tPLH/tPHL (1.5–9.2 ns) and low output capacitance (10 pF) maintain waveform fidelity up to 50-MHz fundamental frequencies.

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
74ACT11244PWR	Same silicon, identical electrical specs, TSSOP-24 package, active production status (vs. obsolete 74ACT11244PW).	Identical use cases; differs only in tape-and-reel packaging (2000 pcs/reel) and active lifecycle status.	Select 74ACT11244PWR for new designs requiring guaranteed long-term availability and standard logistics support.
SN74ACT244NSR	Same function and pinout, SOIC-20 package (not pin-compatible), slightly higher ICC (1 mA vs. 0.9 mA typical), same 5-V operation.	Requires PCB redesign due to different pin count and layout; suitable where SOIC footprint is preferred over TSSOP.	Choose SN74ACT244NSR only when board space permits larger SOIC and legacy assembly infrastructure favors that package.

Compared with 74ACT11244PW, the active 74ACT11244PWR offers identical performance with assured supply continuity, while SN74ACT244NSR trades compact TSSOP for SOIC convenience at the cost of layout compatibility and marginally higher quiescent current.

Availability

74ACT11244PW is available at Aetrix Electronics and suitable for industrial control systems, memory subsystems, and test instrumentation requiring stable component supply and proven 5-V logic interfacing capability.

Supply support for 74ACT11244PW 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 leader delivering analog, embedded processing, and logic solutions with emphasis on reliability, precision, and industrial-grade qualification.

The 74ACT11244PW belongs to TI's advanced CMOS logic family, engineered for high-speed, low-noise digital interfacing in memory, bus, and control applications where TTL compatibility and robust 3-state operation are essential.

FAQ

What is the operating voltage range for the 74ACT11244PW?

The 74ACT11244PW operates from 4.5 V to 5.5 V, with absolute maximum supply voltage rated at 6 V. This range ensures compatibility with standard 5-V logic systems while accommodating typical power rail tolerances and transient drops encountered in industrial power supplies.

Does the 74ACT11244PW support TTL-level input signals?

Yes, the 74ACT11244PW features TTL-voltage-compatible inputs: VIH = 2.0 V (min) and VIL = 0.8 V (max). This allows direct connection to legacy TTL outputs without level-shifting circuitry, simplifying integration in mixed-logic designs.

What is the difference between 74ACT11244PW and 74ACT11244PWR?

The 74ACT11244PW is obsolete, while 74ACT11244PWR is its active, tape-and-reel packaged counterpart - identical electrically and physically (TSSOP-24), with same marking (AT244), RoHS compliance, and MSL-1 rating. Use 74ACT11244PWR for new designs.

Can the 74ACT11244PW drive multiple TTL loads simultaneously?

Yes, the 74ACT11244PW provides ±24 mA output drive per channel, sufficient to drive up to 10 standard TTL unit loads (UL) while maintaining VOH ≥ 3.94 V and VOL ≤ 0.44 V at VCC = 4.5 V, meeting fanout requirements for most bus applications.

Is the 74ACT11244PW suitable for high-noise industrial environments?

Yes, the 74ACT11244PW includes design features for noise resilience: center-placed VCC/GND pins reduce switching noise, 500-mA latch-up immunity at 125°C exceeds JEDEC requirements, and EPIC CMOS process ensures stable operation across −40°C to +85°C.

74ACT11244PW Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74ACT

Package/Case:: 24-TSSOP (0.173", 4.40mm Width)

Packaging:: Bulk

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:: 24mA, 24mA

Voltage - Supply:: 4.5V ~ 5.5V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 24-TSSOP

74ACT11244PW FAQ

1.How can I place an order for 74ACT11244PW through Aetrix?

Please submit a Request for Quotation (RFQ) for 74ACT11244PW 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 74ACT11244PW reliable?

The price and inventory of 74ACT11244PW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ACT11244PW is usually 5 days.

3.What payment methods are accepted for 74ACT11244PW?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ACT11244PW transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74ACT11244PW?

74ACT11244PW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74ACT11244PW 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 74ACT11244PW?

For technical support, including 74ACT11244PW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ACT11244PW requirements.

6.How does Aetrix verify that 74ACT11244PW is sourced from the original manufacturer or authorized distributors?

All 74ACT11244PW 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 74ACT11244PW meets industry standards.

7.What is the process for return or replacement of 74ACT11244PW?

All 74ACT11244PW units undergo pre-shipment inspection (PSI). If there is an issue with 74ACT11244PW, 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 74ACT11244PW part is unused and in its original packaging.

Return procedure for 74ACT11244PW:

1.Submit a request within 90 days.

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

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