CD74HC40105M Equivalent & Substitute Parts

Part Overview

The CD74HC40105M is an asynchronous FIFO (First-In-First-Out) memory circuit with 64-bit capacity (16 x 4 configuration) in a 16-SOIC surface mount package. This device is classified as Last Time Buy, indicating discontinued production with limited availability. The CD74HC40105M96 serves as the direct manufacturer-recommended substitute, offering identical electrical and mechanical specifications with active product status and improved inventory availability.

Substiute Parts

CD74HC40105M

Texas InstrumentsIn Stock: 1766CD74HC40105M Datasheet

Current PartRFQ

CD74HC40105M96

Texas InstrumentsIn Stock: 3212CD74HC40105M96 Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

The CD74HC40105M96 qualifies as a direct substitute based on the following critical parameters:

• Memory Configuration: Identical 64-bit (16 x 4) capacity
• Function Type: Both are asynchronous FIFO circuits
• Bus Architecture: Both are uni-directional
• Supply Voltage Range: Both operate at 2 V ~ 6 V
• Temperature Range: Both rated -55°C ~ 125°C
• Package Specification: Both use 16-SOIC (0.154", 3.90mm Width)
• Compliance Standards: Both ROHS3 compliant with MSL 1 rating

The only difference between these parts is the packaging format: CD74HC40105M is supplied in Tube packaging, while CD74HC40105M96 is supplied in Tape & Reel (TR) format. This distinction affects handling and automated assembly compatibility but does not alter electrical or functional characteristics.

Parameter Comparison

Engineering Selection Recommendations

The CD74HC40105M96 is the manufacturer-designated substitute for the CD74HC40105M. Selection between these parts should be based on the following criteria:

Choose CD74HC40105M96 when:

• Active product status is required for long-term supply chain reliability
• Tape & Reel packaging is compatible with automated assembly equipment
• New designs or production runs require components with extended availability

Choose CD74HC40105M when:

• Existing inventory of Tube-packaged components is available
• Manual assembly or hand-placement processes are employed
• Immediate availability from existing stock is prioritized

Both parts maintain identical electrical performance, thermal ratings, and regulatory compliance (ROHS3, MSL 1). The substitution is electrically and mechanically transparent at the circuit level.

Frequently Asked Questions (FAQ)

Q: Are CD74HC40105M and CD74HC40105M96 pin-compatible? A: Yes. Both devices use the 16-SOIC package with identical pin assignments and electrical characteristics. Direct substitution is possible without circuit modification.

Q: What is the difference between Tube and Tape & Reel packaging? A: Tube packaging supplies individual components in a plastic tube for manual handling. Tape & Reel packaging supplies components on continuous carrier tape for automated pick-and-place assembly. The electrical and functional specifications are identical.

Q: Can I use CD74HC40105M96 in place of CD74HC40105M in existing designs? A: Yes. The CD74HC40105M96 is electrically and functionally equivalent. Packaging format is the only difference, which affects assembly method but not circuit performance.

Q: Why is CD74HC40105M marked as Last Time Buy? A: Last Time Buy status indicates the manufacturer has discontinued this product line. The CD74HC40105M96 (active status) is the recommended alternative for continued supply.

Q: Are there any compliance differences between these parts? A: No. Both parts are ROHS3 compliant with MSL 1 rating and identical REACH and ECCN classifications.

Q: What is the memory capacity of these FIFO circuits? A: Both devices provide 64 bits of storage organized as 16 words × 4 bits per word in an asynchronous configuration.