SN74AC244MDWREP Equivalent & Substitute Parts

Part Overview

The SN74AC244MDWREP is a non-inverting buffer logic integrated circuit manufactured by Texas Instruments, designed for 2 element, 4-bit per element configurations with 3-state output capability. This 20-SOIC surface mount device operates across a 2V to 6V supply voltage range and is classified as Active product status. Substitute parts become necessary due to inventory constraints, regional availability, packaging format requirements, or specific manufacturing certifications needed for particular applications.

Key Parameters

Parameter	Value
Logic Type	Buffer, Non-Inverting
Number of Elements	2
Number of Bits per Element	4
Output Type	3-State
Current - Output High, Low	24mA, 24mA
Voltage - Supply	2V ~ 6V
Package / Case	20-SOIC (0.295", 7.50mm Width)
Mounting Type	Surface Mount
Series	74AC
Product Status	Active

Substitute Part Grouping Explanation

Substitution eligibility for the SN74AC244MDWREP is determined by strict adherence to the following parameters: logic type (Buffer, Non-Inverting), number of elements (2), bits per element (4), output type (3-State), output current specifications (24mA, 24mA), supply voltage range (2V ~ 6V), package type (20-SOIC), and mounting type (Surface Mount). All qualified substitute parts maintain identical functional and electrical characteristics within these parameters. Variations in operating temperature range, packaging format (Tape & Reel, Cut Tape, Tube), manufacturer identity, and moisture sensitivity level do not affect functional substitutability when these core parameters remain constant.

Parameter Comparison

Parameter	SN74AC244MDWREP (TI)	74AC244SC (Fairchild)	74AC244SCX (onsemi)	MC74AC244DWG (onsemi)	MC74AC244DWR2G (onsemi)
Logic Type	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting
Number of Elements	2	2	2	2	2
Number of Bits per Element	4	4	4	4	4
Output Type	3-State	3-State	3-State	3-State	3-State
Current - Output High, Low	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA
Voltage - Supply	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V
Package / Case	20-SOIC	20-SOIC	20-SOIC	20-SOIC	20-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Series	74AC	74AC	74AC	74AC	74AC
Operating Temperature	-55°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Packaging Format	Tape & Reel (TR)	Not specified	Cut Tape (CT) & Digi-Reel®	Tube	Cut Tape (CT) & Digi-Reel®
RoHS Status	ROHS3 Compliant	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	Not specified	3 (168 Hours)	3 (168 Hours)	3 (168 Hours)

Engineering Selection Recommendations

All substitute parts listed maintain Active product status and are functionally equivalent to the SN74AC244MDWREP. Selection among substitutes should be based on packaging format availability and application requirements. The SN74AC244MDWREP offers the widest operating temperature range (-55°C ~ 125°C) and lowest moisture sensitivity level (MSL 1), making it suitable for extended temperature and high-humidity storage environments. Substitute parts from onsemi (74AC244SCX, MC74AC244DWG, MC74AC244DWR2G) and Fairchild (74AC244SC) operate within -40°C ~ 85°C and carry MSL 3 ratings, appropriate for standard industrial and commercial applications. All parts maintain ROHS3 compliance where specified and carry identical electrical performance characteristics. Packaging format selection (Tape & Reel, Cut Tape, or Tube) should align with assembly process requirements and inventory management protocols.

Frequently Asked Questions (FAQ)

Q: Can 74AC244SC substitute for SN74AC244MDWREP in all applications? A: Yes, provided the operating temperature range of -40°C ~ 85°C meets application requirements. The 74AC244SC maintains identical electrical specifications and 20-SOIC package compatibility.

Q: What is the difference between MC74AC244DWR2G and MC74AC244DWG? A: Both parts are functionally equivalent with identical electrical specifications. The primary difference is packaging format: MC74AC244DWR2G is supplied in Cut Tape (CT) & Digi-Reel® format, while MC74AC244DWG is supplied in Tube format.

Q: Does the SN74AC244MDWREP's extended temperature range (-55°C ~ 125°C) affect substitution decisions? A: The extended temperature range is a superset capability. If an application operates within -40°C ~ 85°C, substitute parts with this narrower range are functionally compatible. Applications requiring -55°C ~ 125°C operation must use the SN74AC244MDWREP or equivalent parts with matching extended specifications.

Q: Are all substitute parts ROHS3 compliant? A: ROHS3 compliance is confirmed for SN74AC244MDWREP, 74AC244SCX, MC74AC244DWG, and MC74AC244DWR2G. Compliance status for 74AC244SC is not specified in available documentation.

Q: What does MSL 1 versus MSL 3 mean for component handling? A: MSL 1 (Unlimited) indicates the SN74AC244MDWREP has no moisture sensitivity restrictions and can be stored indefinitely before soldering. MSL 3 (168 Hours) substitute parts must be soldered within 168 hours of package opening under specified humidity conditions, requiring controlled storage and handling protocols.

Q: Can these parts be used interchangeably on the same PCB assembly? A: Yes, all substitute parts share identical 20-SOIC package dimensions and pin configurations, enabling direct PCB footprint compatibility and interchangeable assembly.

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