74F2244SC Equivalent & Substitute Parts

Part Overview

The 74F2244SC is a non-inverting buffer logic integrated circuit manufactured by onsemi, featuring 2 elements with 4 bits per element and 3-state output capability. Designed for 5.5V operation in a 20-SOIC surface mount package, this component is classified as obsolete product status. Due to its obsolete designation, identifying functionally equivalent substitute parts from active manufacturers is essential for design continuity and procurement reliability.

Key Parameters

Parameter	Specification
Logic Type	Buffer, Non-Inverting
Number of Elements	2
Number of Bits per Element	4
Output Type	3-State
Voltage Supply Range	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C (TA)
Package / Case	20-SOIC
Mounting Type	Surface Mount
Series	74F

Substitute Part Grouping Explanation

Substitute parts for the 74F2244SC are qualified based on the following critical parameters that determine functional equivalence:

Logic Type: Buffer, Non-Inverting (identical function)
Number of Elements: 2 (identical configuration)
Number of Bits per Element: 4 (identical bit width)
Output Type: 3-State (identical output capability)
Voltage Supply Range: 4.5V ~ 5.5V (identical operating voltage)
Operating Temperature: 0°C ~ 70°C (identical temperature range)
Series: 74F (same logic family)
Package / Case: 20-SOIC or 20-SO (compatible surface mount packages)

All identified substitute parts maintain these core electrical and mechanical parameters, ensuring direct functional replacement capability.

Parameter Comparison

Parameter	74F2244SC (onsemi)	SN74F244DW (TI)	SN74F244DWR (TI)	SN74F244NSR (TI)
Manufacturer	onsemi	Texas Instruments	Texas Instruments	Texas Instruments
Logic Type	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting	Buffer, Non-Inverting
Number of Elements	2	2	2	2
Number of Bits per Element	4	4	4	4
Output Type	3-State	3-State	3-State	3-State
Current - Output High, Low	3mA, 12mA	15mA, 64mA	15mA, 64mA	15mA, 64mA
Voltage - Supply	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Operating Temperature	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)	0°C ~ 70°C (TA)
Package / Case	20-SOIC (0.295", 7.50mm Width)	20-SOIC (0.295", 7.50mm Width)	20-SOIC (0.295", 7.50mm Width)	20-SOIC (0.209", 5.30mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Last Time Buy	Active	Active
RoHS Status	Not specified	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant

Engineering Selection Recommendations

SN74F244DWR (Texas Instruments) is the primary recommended substitute. This part maintains all critical electrical parameters identical to the 74F2244SC, operates in the same voltage and temperature ranges, and is classified as Active product status with ROHS3 compliance. The higher output current specifications (15mA, 64mA versus 3mA, 12mA) provide enhanced drive capability without compromising compatibility. Packaging in Cut Tape & Digi-Reel format supports both prototype and production volume requirements.

SN74F244DW (Texas Instruments) serves as an alternative substitute with identical electrical specifications to SN74F244DWR. Last Time Buy status indicates limited future availability; however, current inventory of 2700 units supports near-term procurement needs. Tube packaging is suitable for lower-volume applications.

SN74F244NSR (Texas Instruments) is functionally equivalent with Active product status and ROHS3 compliance. The 20-SO package variant (0.209" width versus 0.295" width) requires PCB layout verification for pin-to-pin compatibility, though electrical function remains unchanged. Tape & Reel packaging supports automated assembly processes.

Frequently Asked Questions (FAQ)

Q: Can SN74F244DWR directly replace 74F2244SC without circuit modification?

A: Yes. Both parts share identical logic type, element count, bit width, output type, voltage supply range, and operating temperature. The higher output current of SN74F244DWR (15mA, 64mA) is a superset capability and does not require circuit changes.

Q: What is the difference between SN74F244DW and SN74F244DWR?

A: Both parts are electrically identical. The primary difference is packaging format: SN74F244DW is supplied in Tube packaging, while SN74F244DWR is supplied in Cut Tape & Digi-Reel format. Selection depends on procurement and assembly requirements.

Q: Is SN74F244NSR compatible with the original 74F2244SC PCB layout?

A: SN74F244NSR uses a 20-SO package with 0.209" width compared to the 20-SOIC package with 0.295" width of the original part. Pin count and function are identical, but PCB footprint dimensions differ. Layout verification is required before substitution.

Q: Why do the Texas Instruments parts have higher output current specifications?

A: Output current specifications reflect the maximum drive capability of each device. The higher values in Texas Instruments parts (15mA, 64mA) represent enhanced performance within the same 74F logic family. These values are backward compatible with designs expecting lower current outputs.

Q: Are all substitute parts RoHS compliant?

A: Yes. All three Texas Instruments substitute parts (SN74F244DW, SN74F244DWR, SN74F244NSR) are ROHS3 compliant. The original 74F2244SC RoHS status is not specified in available documentation.

Q: What is the inventory status for each substitute part?

A: SN74F244DWR has 7783 units in stock (Active status). SN74F244DW has 2700 units in stock (Last Time Buy status). SN74F244NSR has 2120 units in stock (Active status). Inventory levels support both prototype development and production deployment.

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