74VHCT245M Equivalent & Substitute Parts

Part Overview

The 74VHCT245M is a non-inverting transceiver IC manufactured by onsemi, designed for 8-bit data bus applications with single element configuration. This component operates within the 4.5V to 5.5V supply voltage range and is housed in a 20-SOIC surface mount package. The product is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing system support and component procurement.

Substiute Parts

74VHCT245M

onsemiIn Stock: 110874VHCT245M Datasheet

Current PartRFQ

CD74HCT245M

Harris CorporationIn Stock: 1201CD74HCT245M Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the 74VHCT245M is determined by the following critical parameters:

• Logic Family Compatibility: Both main and substitute parts must function as non-inverting transceivers
• Bit Configuration: 1 element with 8 bits per element is the required configuration
• Supply Voltage Range: 4.5V to 5.5V compatibility ensures direct voltage compatibility
• Package Specification: 20-SOIC surface mount package with identical physical dimensions (0.295", 7.50mm Width)
• Output Characteristics: Output drive capability and output type determine functional equivalence

The CD74HCT245M from Harris Corporation meets these substitution criteria. Both parts share identical supply voltage ranges, package specifications, and core transceiver functionality. The substitute maintains the 8-bit, single-element configuration required for direct replacement in existing designs.

Parameter Comparison

Engineering Selection Recommendations

Both the 74VHCT245M and CD74HCT245M are classified as obsolete products. Selection between these parts should be based on the following factors:

Supply Voltage and Package Compatibility: Both parts operate within identical 4.5V to 5.5V supply ranges and utilize the same 20-SOIC package, ensuring mechanical and electrical compatibility in existing PCB layouts.

Output Drive Capability: The 74VHCT245M provides 8mA output current (high and low), while the CD74HCT245M provides 4mA. Applications requiring higher output drive should retain the original 74VHCT245M specification if available. Applications with lower output current requirements may utilize the CD74HCT245M.

Operating Temperature Range: The CD74HCT245M supports an extended operating temperature range (-55°C to 125°C) compared to the 74VHCT245M (-40°C to 85°C). Selection should align with system thermal requirements.

Output Configuration: The CD74HCT245M features 3-state output capability, providing additional flexibility for bus-sharing applications. The 74VHCT245M uses standard output configuration.

RoHS and Compliance Status: Both parts are RoHS non-compliant and share identical ECCN (EAR99) and HTSUS (8542.39.0001) classifications.

Frequently Asked Questions (FAQ)

Q: Can the CD74HCT245M directly replace the 74VHCT245M in existing designs?

A: Direct replacement is possible due to identical package specifications (20-SOIC) and supply voltage ranges (4.5V to 5.5V). However, the reduced output current (4mA vs. 8mA) and different output type (3-state vs. standard) must be evaluated against circuit requirements.

Q: What is the primary difference between these two transceiver parts?

A: The main differences are output drive capability (8mA vs. 4mA), output type (standard vs. 3-state), and operating temperature range (-40°C to 85°C vs. -55°C to 125°C). Both maintain identical supply voltage and package specifications.

Q: Are both parts suitable for new designs?

A: Both parts are classified as obsolete. New designs should evaluate current-generation transceiver alternatives from active product lines. These parts are suitable only for legacy system support and replacement applications.

Q: Does the 3-state output of the CD74HCT245M affect compatibility?

A: The 3-state output provides additional functionality for bus-sharing applications. In designs where standard output is required, this feature does not negatively impact compatibility but adds capability. Circuit design must account for 3-state control logic if utilized.

Q: Are there packaging or moisture sensitivity differences?

A: Both parts are housed in 20-SOIC surface mount packages with identical physical dimensions. The 74VHCT245M specifies MSL 1 (Unlimited). Packaging specifications should be confirmed with current inventory documentation.