74HC194N,652 Equivalent & Substitute Parts

Part Overview

The 74HC194N,652 is a 4-bit bidirectional shift register manufactured by NXP USA Inc., housed in a 16-DIP package. This component functions as a universal shift register with push-pull output configuration, supporting parallel input and parallel output operations. The part is classified as obsolete, making equivalent substitute components necessary for ongoing design support and procurement continuity. The 74HC194 series provides reliable shift register functionality across industrial and commercial applications requiring bidirectional data manipulation.

Substiute Parts

74HC194N,652

NXP USA Inc.In Stock: 107474HC194N,652 Datasheet

Current PartRFQ

CD74HC194E

Harris CorporationIn Stock: 3131CD74HC194E Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute components for the 74HC194N,652 must maintain functional and electrical equivalence based on the following critical parameters:

Functional Requirements:

• Logic type: Bidirectional shift register
• Number of bits per element: 4 bits
• Function classification: Universal
• Output configuration: Push-Pull

Electrical Requirements:

• Supply voltage range: 2V ~ 6V
• Operating temperature range: Must encompass or exceed -40°C ~ 125°C
• Package type: 16-DIP (0.300", 7.62mm) or compatible 16-pin DIP variant

Series Compatibility:

• Base product number: 74HC194
• Logic family: 74HC series

The CD74HC194E qualifies as a direct substitute, meeting all functional and electrical parameters while maintaining package compatibility through the 16-DIP form factor.

Parameter Comparison

Engineering Selection Recommendations

The CD74HC194E serves as a qualified substitute for the 74HC194N,652 based on electrical and functional equivalence. Both components are classified as obsolete products, indicating limited availability through standard distribution channels.

Compliance Considerations:

The 74HC194N,652 maintains RoHS3 compliance and REACH unaffected status. The CD74HC194E is RoHS non-compliant, which may impact suitability for applications subject to RoHS regulatory requirements. Design teams must verify compliance obligations before selecting the CD74HC194E as a replacement.

Temperature Performance:

The CD74HC194E provides an extended lower operating temperature limit of -55°C compared to the -40°C minimum of the 74HC194N,652, offering improved performance in cold environment applications while maintaining the same upper temperature threshold.

Packaging and Availability:

Both components utilize identical 16-DIP package geometry, ensuring direct mechanical and electrical compatibility in through-hole PCB applications. Packaging format differences (tube versus standard) do not affect functional substitution.

Frequently Asked Questions (FAQ)

Q: Can the CD74HC194E replace the 74HC194N,652 in all applications?

A: The CD74HC194E provides functional and electrical equivalence for applications not subject to RoHS compliance requirements. Both components share identical supply voltage ranges, operating temperature maximums, and package configurations. Applications requiring RoHS certification must evaluate alternative sources or compliance implications.

Q: What are the key differences between these two parts?

A: The primary differences are manufacturer origin (NXP versus Harris Corporation), RoHS compliance status (compliant versus non-compliant), and lower operating temperature limit (CD74HC194E extends to -55°C versus -40°C for the 74HC194N,652). Functional and electrical specifications remain equivalent.

Q: Are there any package compatibility concerns?

A: No. Both the 74HC194N,652 and CD74HC194E use identical 16-DIP (0.300", 7.62mm) packages, ensuring direct pin-for-pin compatibility and mechanical interchangeability in through-hole PCB designs.

Q: Why are both parts classified as obsolete?

A: Obsolete status indicates these components are no longer in active production by their respective manufacturers. This classification necessitates substitute component identification for design continuity and procurement planning.

Q: What supply voltage range do these components support?

A: Both the 74HC194N,652 and CD74HC194E operate across a 2V to 6V supply voltage range, supporting applications from low-power battery-operated designs to standard logic voltage levels.

Q: How do the operating temperature ranges compare?

A: The 74HC194N,652 operates from -40°C to 125°C, while the CD74HC194E extends the lower limit to -55°C, providing superior performance in cold environment applications. Both maintain the same 125°C upper temperature threshold.