74F244SCX Equivalent & Substitute Parts

Part Overview

The 74F244SCX is a non-inverting buffer IC manufactured by onsemi, featuring 2 elements with 4 bits per element and 3-state output capability. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement continuity. The 74F244 series provides buffering functionality suitable for logic-level signal distribution in digital circuits operating within the 4.5V to 5.5V supply range.

Substiute Parts

74F244SCX

onsemiIn Stock: 1743274F244SCX Datasheet

Current PartRFQ

SN74F244DW

Texas InstrumentsIn Stock: 2747SN74F244DW Datasheet

DirectRFQ

SN74F244DWR

Texas InstrumentsIn Stock: 7819SN74F244DWR Datasheet

DirectRFQ

SN74F244NSR

Texas InstrumentsIn Stock: 2150SN74F244NSR Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74F244SCX are classified based on electrical and mechanical compatibility within the 74F logic family. The substitution criteria are strictly defined by the following parameters:

Primary Substitution Criteria:

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

Direct Substitutes maintain identical electrical specifications and package dimensions (0.295", 7.50mm Width):

• SN74F244DW (Texas Instruments)
• SN74F244DWR (Texas Instruments)

Similar Substitute maintains electrical specifications with package dimension variation (0.209", 5.30mm Width):

• SN74F244NSR (Texas Instruments)

Parameter Comparison

Engineering Selection Recommendations

SN74F244DWR (Texas Instruments) is the primary recommended substitute. This part maintains full electrical and mechanical compatibility with the 74F244SCX, operates at identical voltage and temperature ranges, and carries Active product status with ROHS3 compliance. The higher output high current specification (15mA versus 3mA) provides improved drive capability without compromising circuit compatibility.

SN74F244DW (Texas Instruments) serves as an alternative direct substitute with identical electrical and package specifications. This part carries Last Time Buy status, indicating limited future availability.

SN74F244NSR (Texas Instruments) is functionally equivalent but features a narrower package body (0.209" versus 0.295" width). This part is suitable only for designs where PCB layout accommodates the reduced package width. Active product status and ROHS3 compliance are maintained.

Frequently Asked Questions (FAQ)

Q: Can SN74F244DWR directly replace 74F244SCX in existing designs? A: Yes. SN74F244DWR maintains identical electrical specifications, package dimensions, and pin configuration. No circuit modifications are required.

Q: What is the significance of the higher output high current (15mA) in the Texas Instruments substitutes? A: The Texas Instruments parts specify 15mA output high current compared to 3mA in the 74F244SCX. This represents improved drive capability and does not create compatibility issues in circuits designed for the original part.

Q: Is SN74F244NSR compatible with PCBs designed for 74F244SCX? A: SN74F244NSR is electrically compatible but features a narrower package body (0.209" versus 0.295" width). PCB footprints designed for the standard 0.295" width package may require layout verification before use.

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 and Digi-Reel format. SN74F244DWR carries Active product status, while SN74F244DW is Last Time Buy.

Q: Are all substitute parts RoHS compliant? A: Yes. All Texas Instruments substitutes (SN74F244DW, SN74F244DWR, SN74F244NSR) are ROHS3 compliant. The original 74F244SCX RoHS status is not specified in available documentation.