74HCT299N,652 Equivalent & Substitute Parts

Part Overview

The 74HCT299N,652 is a universal shift register IC featuring 2 elements with 8 bits per element in a 20-DIP package. This component is classified as obsolete, making equivalent and substitute parts necessary for ongoing system maintenance and new design implementations. The part operates within the 4.5V to 5.5V supply voltage range with tri-state output configuration, suitable for parallel input/output shift register applications in digital logic circuits.

Substiute Parts

74HCT299N,652

NXP USA Inc.In Stock: 79574HCT299N,652 Datasheet

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CD74HCT299E

Harris CorporationIn Stock: 1417CD74HCT299E Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution for the 74HCT299N,652 is determined by strict equivalence across the following critical parameters:

• Logic Type: Shift Register
• Number of Elements: 2
• Number of Bits per Element: 8
• Function: Universal
• Output Type: Tri-State
• Voltage - Supply: 4.5V ~ 5.5V
• Package / Case: 20-DIP (0.300", 7.62mm)
• Mounting Type: Through Hole

The CD74HCT299E from Harris Corporation meets all these core electrical and mechanical requirements, establishing it as a direct functional equivalent. Both parts share the same base product number (74HCT299) and operate within compatible voltage and temperature ranges.

Parameter Comparison

Engineering Selection Recommendations

The CD74HCT299E serves as a direct substitute for the 74HCT299N,652 based on electrical and mechanical parameter equivalence. Both components are classified as obsolete products, indicating limited availability through standard distribution channels.

The CD74HCT299E provides an extended lower operating temperature range (-55°C versus -40°C), which represents an advantage for applications requiring operation in lower temperature environments. The NXP part maintains RoHS3 compliance, while the Harris substitute is RoHS non-compliant. For applications subject to RoHS regulatory requirements, component selection must account for this compliance difference.

Both parts are packaged in 20-DIP through-hole configuration and maintain identical electrical specifications for supply voltage and logic function, ensuring direct pin-compatible substitution in existing circuit designs.

Frequently Asked Questions (FAQ)

Q: Can the CD74HCT299E replace the 74HCT299N,652 in existing designs?

A: Yes. Both parts are electrically and mechanically equivalent across all critical parameters: 2-element, 8-bit universal shift register with tri-state output in 20-DIP through-hole package, operating at 4.5V to 5.5V supply voltage.

Q: What is the difference in operating temperature range between these parts?

A: The 74HCT299N,652 operates from -40°C to 125°C, while the CD74HCT299E operates from -55°C to 125°C. The Harris part supports a lower minimum temperature, making it suitable for applications requiring extended cold-temperature operation.

Q: Are there compliance differences between these substitutes?

A: Yes. The 74HCT299N,652 is RoHS3 compliant, while the CD74HCT299E is RoHS non-compliant. Applications subject to RoHS regulatory requirements must account for this distinction when selecting components.

Q: What packaging format is used for these parts?

A: Both parts use 20-DIP (0.300", 7.62mm) through-hole packaging. The supplier device package designation differs (20-DIP versus 20-PDIP), but both refer to the same physical 20-pin dual inline package format suitable for through-hole PCB assembly.

Q: Why are both parts classified as obsolete?

A: Obsolete status indicates these components are no longer in active production by their respective manufacturers. Availability is limited to existing inventory through authorized distributors and component resellers.