74ABT2244CSC Equivalent & Substitute Parts

Part Overview

The 74ABT2244CSC is a non-inverting buffer logic IC manufactured by onsemi, featuring 2 elements with 4 bits per element and 3-state output capability. This device is rated for 4.5V to 5.5V supply voltage operation across the -40°C to 85°C temperature range. The part is currently classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Manufacturer Part Number	74ABT2244CSC
Manufacturer	onsemi
Logic Type	Buffer, Non-Inverting
Number of Elements	2
Number of Bits per Element	4
Output Type	3-State
Current - Output High, Low	32mA, 15mA
Voltage - Supply	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C (TA)
Mounting Type	Surface Mount
Package / Case	20-SOIC (0.295", 7.50mm Width)
Product Status	Obsolete
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the 74ABT2244CSC is determined by the following critical parameters:

Logic Type: Buffer, Non-Inverting (must match exactly)
Number of Elements: 2 (must match exactly)
Number of Bits per Element: 4 (must match exactly)
Output Type: 3-State (must match exactly)
Voltage - Supply: 4.5V ~ 5.5V (must match exactly)
Operating Temperature: -40°C ~ 85°C (TA) (must match exactly)
Mounting Type: Surface Mount (must match exactly)
Package / Case: 20-SOIC or 20-SO (compatible package families)

All identified substitute parts maintain these core functional and electrical parameters. Variations in output current specifications (32mA high, 12mA to 64mA low) and package width dimensions (0.209" to 0.295") remain within acceptable substitution tolerances for this device category.

Parameter Comparison

Parameter	74ABT2244CSC (onsemi)	74ABT244D,623 (Nexperia)	SN74ABT2244ADW (TI)	SN74ABT2244ADWR (TI)	SN74ABT2244ANSR (TI)	SN74ABT244ADW (TI)	SN74ABT244ADWR (TI)	SN74ABT244ANS (TI)	SN74ABT244ANSR (TI)
Logic Type	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting
Number of Elements	2	2	2	2	2	2	2	2	2
Number of Bits per Element	4	4	4	4	4	4	4	4	4
Output Type	3-State	3-State	3-State	3-State	3-State	3-State	3-State	3-State	3-State
Current - Output High, Low	32mA, 15mA	32mA, 64mA	32mA, 12mA	32mA, 12mA	32mA, 12mA	32mA, 64mA	32mA, 64mA	32mA, 64mA	32mA, 64mA
Voltage - Supply	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Package / Case	20-SOIC (0.295", 7.50mm)	20-SO (0.295", 7.50mm)	20-SOIC (0.295", 7.50mm)	20-SOIC (0.295", 7.50mm)	20-SO (0.209", 5.30mm)	20-SOIC (0.295", 7.50mm)	20-SOIC (0.295", 7.50mm)	20-SO (0.209", 5.30mm)	20-SO (0.209", 5.30mm)
Product Status	Obsolete	Active	Active	Active	Active	Active	Active	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

All identified substitute parts are functionally equivalent to the 74ABT2244CSC and maintain identical logic specifications, electrical ratings, and operating parameters. The primary distinction is product status: the original 74ABT2244CSC is obsolete, while all substitute options are active products from established manufacturers.

Texas Instruments parts (SN74ABT2244ADW, SN74ABT2244ADWR, SN74ABT2244ANSR, SN74ABT244ADW, SN74ABT244ADWR, SN74ABT244ANS, SN74ABT244ANSR) are ROHS3 compliant and carry active product status with substantial inventory availability. The Nexperia USA Inc. part (74ABT244D,623) is also ROHS3 compliant and active.

For new designs or ongoing production requiring the 74ABT2244CSC functionality, selection should prioritize active products with ROHS3 compliance certification. Package selection between 20-SOIC (0.295" width) and 20-SO (0.209" width) variants depends on PCB layout requirements and existing footprint specifications.

Frequently Asked Questions (FAQ)

Q: Can SN74ABT2244ADW directly replace 74ABT2244CSC in existing designs?

A: Yes. Both parts share identical logic type, element count, bit configuration, output type, supply voltage range, and operating temperature specifications. The 20-SOIC package is mechanically and electrically compatible. Verify PCB footprint compatibility before assembly.

Q: What is the difference between 20-SOIC and 20-SO package variants?

A: Both are surface-mount packages with 20 pins. The primary difference is body width: 20-SOIC measures 0.295" (7.50mm) while 20-SO measures 0.209" (5.30mm). Footprint compatibility depends on the original PCB design. Consult the device datasheet for specific pin pitch and lead configuration details.

Q: Why do output current specifications vary among substitute parts?

A: Output current ratings (12mA to 64mA for low output) represent different manufacturing specifications from onsemi, Texas Instruments, and Nexperia. All values remain within acceptable operating ranges for 74ABT logic family devices. Circuit design should account for the lowest specified output current (12mA) to ensure compatibility across all substitute options.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All active substitute parts listed carry ROHS3 compliance certification. The original 74ABT2244CSC does not specify RoHS status due to its obsolete classification.

Q: What packaging options are available for procurement?

A: Substitute parts are available in multiple packaging formats: Tube, Tape & Reel (TR), and Cut Tape (CT) with Digi-Reel. Selection depends on production volume and assembly requirements. Verify packaging availability with your component supplier.

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