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SN74AHCT244MDWREP

IC BUFF 4.5V/5.5V 20-SOIC

Part Number: SN74AHCT244MDWREP

Manufacturer: Texas Instruments

Category: Buffers, Drivers, Receivers, Transceivers

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

Datasheet:: SN74AHCT244MDWREP.pdf

Description: IC BUFF 4.5V/5.5V 20-SOIC

Select Quantity Stock: 1,501

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PRODUCT INFORMATION

Product Details

PRODUCT TECHNICAL REFERENCE

SN74AHCT244MDWREP Enhanced Product Octal Buffer/Driver with 3-State Outputs

A comprehensive technical overview of the SN74AHCT244MDWREP, an Enhanced Product (EP) octal buffer and line driver from Texas Instruments featuring 4.5-V to 5.5-V VCC operation, 8 mA output current, 9.5 ns maximum propagation delay, 3-state outputs, TTL-compatible CMOS inputs, and extended temperature range of –55°C to 125°C. Covers device function, core features, electrical specifications, 20-lead SOIC package, pin configuration, typical applications, and replacement selection guidance.

Texas Instruments 20-SOIC 4.5V to 5.5V

Device Classification Octal Buffer/Driver with 3-State Outputs

Part Number: SN74AHCT244MDWREP

Mounting Type: Surface Mount

Operating Temperature Range: -55°C to +125°C

PRODUCT OVERVIEW

What Is the SN74AHCT244MDWREP?

SN74AHCT244MDWREP is an Enhanced Product (EP) octal buffer and line driver from Texas Instruments, part of the SN74AHCT244-EP family. The device is designed for 4.5-V to 5.5-V VCC operation and is specifically intended to improve both the performance and density of 3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters.

The device is organized as two 4-bit line drivers with separate output-enable (OE) inputs. When OE is low, the device passes data from the A inputs to the Y outputs. When OE is high, the outputs are in the high-impedance state. The SN74AHCT244-EP features TTL-compatible CMOS inputs and supports a supply voltage range of 4.5 V to 5.5 V.

The EP designation provides support for defense, aerospace, and medical applications with controlled baseline, extended product life cycle, extended product-change notification, product traceability, and qualification pedigree. The SN74AHCT244MDWREP is offered in a 20-lead SOIC (DW) package and is rated for operation from –55°C to +125°C.

Octal Buffer/Driver Eight channels organized as two 4-bit line drivers with independent output-enable (OE) inputs.

TTL-Compatible CMOS Inputs Inputs are TTL-voltage compatible for easy interface with TTL logic families.

Enhanced Product (EP) Supports defense, aerospace, and medical applications with –55°C to 125°C temperature range and qualification pedigree.

DEVICE HIGHLIGHTS

Key Features and Benefits of SN74AHCT244MDWREP

Octal Buffer/Driver with 3-State Outputs

Eight channels organized as two 4-bit line drivers with independent OE inputs, enabling flexible bus interface and memory address driving.

Wide Supply Voltage Range

Operates from 4.5 V to 5.5 V VCC, supporting standard 5-V logic level applications.

TTL-Compatible CMOS Inputs

Inputs are TTL-voltage compatible, enabling direct interface with TTL logic families without additional level shifting.

High-Speed Performance

Maximum propagation delay of 9.5 ns at 5 V with 50 pF load ensures fast signal propagation for high-speed bus applications.

Enhanced Product (EP) Qualification

Supports defense, aerospace, and medical applications with controlled baseline, extended product life cycle, qualification pedigree, and –55°C to 125°C operation.

20-Lead SOIC Package

Available in a 20-lead SOIC (DW) package, ideal for board designs requiring wide bus interfaces.

REFERENCE DATA

Technical Specifications for SN74AHCT244MDWREP

Part Number	SN74AHCT244MDWREP	Manufacturer	Texas Instruments
Device Type	Octal Buffer/Driver with 3-State Outputs	Logic Family	AHCT
Number of Channels	8 (organized as two 4-bit banks)	Number of Elements	2
Supply Voltage (VCC)	4.5 V to 5.5 V	Output Type	3-State
Output Current (High, Low)	8 mA, 8 mA	Input Type	TTL-Compatible CMOS
Propagation Delay (tpd)	9.5 ns @ 5V, 50pF	Load Capacitance (CL)	50 pF
Quiescent Current (Iq)	40 µA	Power Dissipation Capacitance (Cpd)	8.2 pF
Latch-Up Performance	Exceeds 250 mA Per JESD 17	ESD Protection	Exceeds 1000 V Per MIL-STD-883
Package / Case	20-SOIC (0.295", 7.50mm Width)	Supplier Device Package	20-SOIC
Package Body Size	12.80mm × 10.30mm	Mounting Type	Surface Mount
Operating Temperature (EP)	-55°C to +125°C	Moisture Sensitivity Level	Level-1-260C-UNLIM
RoHS	Green (RoHS & no Sb/Br)	Lead Finish / Ball Material	CU NIPDAU
REACH Status	REACH Unaffected	Packaging	Tape & Reel (2,000 per Reel)
Product Status	Active	ECCN	EAR99
Device Marking	AHCT244M	V62/03657-01YE	V62/03657-01YE

Electrical values shown above are reference values. Test conditions, limits, and guaranteed performance should always be confirmed from the current official manufacturer datasheet before design or production use. Enhanced Product specifications apply over the temperature range of –55°C to 125°C.

DESIGN REFERENCE

Circuit Considerations for SN74AHCT244MDWREP

Power Supply & Decoupling

The SN74AHCT244MDWREP requires proper power supply design for optimal performance:

Supply Voltage: Operates with VCC from 4.5 V to 5.5 V
Decoupling: Place a ceramic capacitor (0.1 µF) close to the VCC pin to minimize supply noise
Output Current: 8 mA output current (high and low) for driving bus lines
Wide Temperature Range: –55°C to 125°C operation for harsh environments
Quiescent Current: Low 40 µA quiescent current for power-sensitive applications

PCB and Signal Integrity Guidance

Buffer/Driver performance depends on layout and signal routing:

Output Enable Control: Two independent OE inputs control each 4-bit bank; when OE is low, data passes from A inputs to Y outputs; when OE is high, outputs are in high-impedance state
3-State Outputs: When OE is high, outputs are in the high-impedance state, allowing multiple outputs to be connected to a common bus
Power-Up/Power-Down: To ensure the high-impedance state during power up or power down, OE should be tied to VCC through a pullup resistor
Ground Plane: Use a solid ground plane to minimize noise and ensure low-inductance return paths
Trace Routing: Keep bus traces short and maintain controlled impedance for high-speed operation
PCB Layout: Follow the recommended PCB footprint from the official datasheet prior to production

20-LEAD SOIC (12.80mm × 10.30mm)

Pin Configuration Reference for SN74AHCT244MDWREP

AHCT244M

SOIC TOP VIEW

Confirm package orientation and pin numbering against the official package drawing before PCB layout. The SOIC (DW) package has 20 pins with a 12.80mm × 10.30mm body size. The package contains pin-1 indicator.

1 1OE Output Enable for Bank 1 (Active Low)

2 1A1 Data Input 1 for Bank 1

3 2Y4 Data Output 4 for Bank 2

4 1A2 Data Input 2 for Bank 1

5 2Y3 Data Output 3 for Bank 2

6 1A3 Data Input 3 for Bank 1

7 2Y2 Data Output 2 for Bank 2

8 1A4 Data Input 4 for Bank 1

9 2Y1 Data Output 1 for Bank 2

10 GND Ground

11 2OE Output Enable for Bank 2 (Active Low)

12 2A1 Data Input 1 for Bank 2

13 1Y4 Data Output 4 for Bank 1

14 2A2 Data Input 2 for Bank 2

15 1Y3 Data Output 3 for Bank 1

16 2A3 Data Input 3 for Bank 2

17 1Y2 Data Output 2 for Bank 1

18 2A4 Data Input 4 for Bank 2

19 1Y1 Data Output 1 for Bank 1

20 VCC Positive Power Supply (4.5 V to 5.5 V)

APPLICATION AREAS

Typical Applications for SN74AHCT244MDWREP

3-State Memory Address Drivers

Designed specifically to improve the performance and density of 3-state memory address drivers for high-speed memory systems.

Clock Drivers

Buffers and distributes clock signals to multiple loads with controlled impedance.

Bus-Oriented Receivers & Transmitters

Provides bidirectional bus interface with 3-state outputs for data communication between different subsystems.

Defense & Aerospace Systems

Enhanced Product (EP) qualification with controlled baseline and –55°C to 125°C temperature range supports military and aerospace applications.

Industrial Control & Automation

Wide supply voltage range and robust temperature performance suit industrial control and automation systems.

Medical Instrumentation

EP qualification and wide temperature range support medical diagnostic equipment requiring high reliability.

REPLACEMENT GUIDANCE

Selecting an Alternative for SN74AHCT244MDWREP

A replacement for the SN74AHCT244MDWREP should not be selected solely by product category. The electrical characteristics, package, and pin configuration must be evaluated against the specific circuit requirements. The following alternatives are documented in the official Texas Instruments datasheet and product pages.

8 channels organized as two 4-bit banks

Supply voltage: 4.5 V to 5.5 V

3-state outputs with independent OE controls

Package: 20-SOIC (DW)

Temperature range: –55°C to 125°C (EP)

Output current: 8 mA

Logic family: AHCT (TTL-compatible CMOS inputs)

RoHS: Green (RoHS & no Sb/Br)

Packaging alternatives (same package, different carrier):

Part Number	Package	Carrier	SPQ	Temperature Range
SN74AHCT244MDWREP	20-SOIC (DW)	Tape & Reel	2,000	-55°C to 125°C
SN74AHCT244MPWREP	20-TSSOP (PW)	Tape & Reel	2,000	-55°C to 125°C

The SN74AHCT244MDWREP is the Enhanced Product (EP) version in 20-SOIC (DW) package with tape-and-reel packaging (2,000 units per reel). For a smaller footprint option, the SN74AHCT244MPWREP is available in a 20-TSSOP (PW) package with the same EP temperature grade and tape-and-reel packaging. Select based on package preference.

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MANUFACTURER INFORMATION

Texas Instruments

The SN74AHCT244-EP (SN74AHCT244MDWREP) belongs to the SN74AHCT244 family of octal buffers and line drivers from Texas Instruments. The device is designed for 4.5-V to 5.5-V VCC operation and features TTL-compatible CMOS inputs. It is specifically intended to improve both the performance and density of 3-state memory address drivers, clock drivers, and bus-oriented receivers and transmitters. The Enhanced Product (EP) designation provides support for defense, aerospace, and medical applications with controlled baseline, extended product life cycle, extended product-change notification, product traceability, and qualification pedigree. The SN74AHCT244-EP is characterized for operation from –55°C to 125°C and is available in 20-SOIC (DW) and 20-TSSOP (PW) packages.

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Haishengye Electronics provides electronic component stock supply, BOM sourcing, quotation support, and quality inspection services for SN74AHCT244MDWREP and related devices.

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Technical Information Disclaimer

This technical guide is provided for product identification and preliminary reference only. Electrical limits, package dimensions, pin configuration, product status, and application suitability must be verified using current official manufacturer documentation before design, procurement, or production.

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Specifications

Product Attribute: Attribute Value

Part Number: SN74AHCT244MDWREP

Manufacturer: Texas Instruments

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

Series: 74AHCT

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

Packaging: Tape & Reel (TR)

Product Status: Active

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: 8mA, 8mA

Voltage - Supply: 4.5V ~ 5.5V

Operating Temperature: -55°C ~ 125°C (TA)

Grade: -

Qualification: -

Mounting Type: Surface Mount

Supplier Device Package: 20-SOIC

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SN74AHCT244MDWREP Procurement and Technical Support

SN74AHCT244MDWREP is manufactured by Texas Instruments. This page provides purchasing information including manufacturer, category, package, datasheet, stock reference, price reference and product specifications.

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Part Number: SN74AHCT244MDWREP

Manufacturer: Texas Instruments

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

Category: Buffers, Drivers, Receivers, Transceivers

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