74F245SCX Equivalent & Substitute Parts

Part Overview

The 74F245SCX is a non-inverting transceiver logic IC manufactured by onsemi, featuring 1 element with 8 bits per element and 3-state output capability in a 20-SOIC package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and production continuity. The 74F245 series provides bidirectional data transmission with controlled output impedance suitable for bus interface applications.

Substiute Parts

74F245SCX

onsemiIn Stock: 425374F245SCX Datasheet

Current PartRFQ

SN74F245DW

Texas InstrumentsIn Stock: 2240SN74F245DW Datasheet

DirectRFQ

SN74F245DWR

Texas InstrumentsIn Stock: 2571SN74F245DWR Datasheet

DirectRFQ

SN74F245NSR

Texas InstrumentsIn Stock: 2086SN74F245NSR Datasheet

SimilarRFQ

SN74BCT245DWR

Texas InstrumentsIn Stock: 1936SN74BCT245DWR Datasheet

Parametric EquivalentRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74F245SCX is determined by strict equivalence across the following critical parameters: logic type (non-inverting transceiver), element and bit configuration (1 element, 8 bits per element), output type (3-state), output current specifications (3mA/24mA and 15mA/64mA), supply voltage range (4.5V ~ 5.5V), operating temperature range (0°C ~ 70°C), and mounting type (surface mount). Package variations within the 20-SOIC family and series designations (74F versus 74BCT) are permitted where electrical characteristics remain identical. Packaging format (tube, tape & reel) does not affect functional equivalence.

Parameter Comparison

Engineering Selection Recommendations

SN74F245DWR is the primary direct substitute, offering identical electrical specifications, active product status, and ROHS3 compliance in tape & reel packaging. This part provides the longest lifecycle support and is recommended for new designs and production continuity.

SN74F245DW provides equivalent functionality with Last Time Buy status and ROHS3 compliance, suitable for applications where tube packaging is acceptable.

SN74F245NSR maintains full electrical equivalence with a narrower 20-SO package (5.30mm width versus 7.50mm). This part is active and ROHS3 compliant but requires PCB layout adjustment due to package width difference.

SN74BCT245DWR is a parametric equivalent from the 74BCT series with identical electrical performance, active status, and ROHS3 compliance. The 74BCT designation indicates advanced CMOS technology with improved noise immunity compared to standard 74F logic, while maintaining full functional compatibility.

Frequently Asked Questions (FAQ)

Q: Can SN74F245DWR directly replace 74F245SCX without PCB modification?

A: Yes. Both parts use identical 20-SOIC packages with 0.295" (7.50mm) width, identical pin configurations, and equivalent electrical specifications. No PCB layout changes are required.

Q: What is the difference between SN74F245DWR and SN74F245NSR?

A: Both are functionally equivalent transceivers with identical electrical performance. The primary difference is package width: SN74F245DWR uses 20-SOIC (7.50mm width) while SN74F245NSR uses 20-SO (5.30mm width). PCB footprint adjustment is necessary when switching between these packages.

Q: Is SN74BCT245DWR compatible with designs specified for 74F245?

A: Yes. SN74BCT245DWR meets all electrical specifications of the 74F245SCX, including supply voltage (4.5V ~ 5.5V), output current ratings, and operating temperature range. The 74BCT series provides enhanced noise immunity through advanced CMOS technology while maintaining full pin and functional compatibility.

Q: Why is 74F245SCX marked as obsolete?

A: The 74F245SCX is an older onsemi product. Texas Instruments maintains active production of equivalent 74F and 74BCT variants, providing continued availability and support for this transceiver function.

Q: What packaging formats are available for substitute parts?

A: SN74F245DW is supplied in tube packaging. SN74F245DWR and SN74BCT245DWR are supplied in tape & reel format. All three maintain identical electrical specifications and 20-SOIC package dimensions suitable for surface mount assembly.

Q: Are all substitute parts ROHS3 compliant?

A: SN74F245DW, SN74F245DWR, SN74F245NSR, and SN74BCT245DWR are all ROHS3 compliant. The original 74F245SCX RoHS status is not specified in available documentation.