74HC194D,652 Equivalent & Substitute Parts

Part Overview

The 74HC194D,652 is a bidirectional 4-bit shift register manufactured by Nexperia USA Inc. in a 16-SOIC surface mount package. This logic component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The 74HC194 series provides universal shift register functionality with push-pull output configuration, suitable for applications requiring data manipulation and signal routing in digital circuits.

Substiute Parts

74HC194D,652

Nexperia USA Inc.In Stock: 123574HC194D,652 Datasheet

Current PartRFQ

CD74HC194M

Harris CorporationIn Stock: 18994CD74HC194M Datasheet

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CD74HC194M96

Texas InstrumentsIn Stock: 2182CD74HC194M96 Datasheet

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CD74HC194MT

Texas InstrumentsIn Stock: 735CD74HC194MT Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74HC194D,652 are qualified based on the following critical parameters that determine functional and mechanical compatibility:

• Logic Type & Function: Register, Bidirectional with Universal function
• Bit Configuration: 1 Element, 4 Bit per Element
• Output Type: Push-Pull
• Voltage Supply Range: 2V ~ 6V
• Package / Case: 16-SOIC (0.154", 3.90mm Width)
• Mounting Type: Surface Mount
• Base Product Number: 74HC194

All substitute parts listed maintain identical electrical specifications and physical packaging, ensuring direct functional replacement in circuit applications. Variations in product status, RoHS compliance, and operating temperature ranges are noted for procurement and regulatory considerations.

Parameter Comparison

Engineering Selection Recommendations

CD74HC194M96 (Texas Instruments) is the primary recommended substitute. This part maintains full electrical and mechanical compatibility with the 74HC194D,652 while offering Active product status, ensuring long-term availability and supply chain stability. It carries ROHS3 compliance and MSL 1 rating, meeting modern regulatory requirements.

CD74HC194MT (Texas Instruments) serves as a secondary option with identical electrical specifications and ROHS3 compliance. However, its Discontinued at DiGi Electronics status may limit procurement channels compared to the CD74HC194M96.

CD74HC194M (Harris Corporation) provides functional equivalence but carries RoHS non-compliant status, making it unsuitable for applications requiring regulatory compliance with modern environmental standards.

All three substitute parts support the full operating temperature range of -55°C to 125°C, which exceeds the original part's -40°C to 125°C specification, providing enhanced thermal margin for demanding applications.

Frequently Asked Questions (FAQ)

Q: Can the CD74HC194M96 directly replace the 74HC194D,652 in existing designs?

A: Yes. Both parts share identical logic type, bit configuration, output type, supply voltage range, and 16-SOIC package dimensions. Pin-to-pin compatibility is maintained, allowing direct substitution without circuit modification.

Q: What is the significance of the operating temperature range difference?

A: The substitute parts operate from -55°C to 125°C compared to the original -40°C to 125°C. This extended lower temperature range provides additional thermal margin but does not affect compatibility in applications operating within the original specification.

Q: Why is RoHS compliance important for this substitution?

A: RoHS3 compliance indicates adherence to current environmental and hazardous substance restrictions. For new designs or applications subject to regulatory requirements, ROHS3-compliant substitutes (CD74HC194M96 and CD74HC194MT) are required. The non-compliant CD74HC194M may only be suitable for legacy or non-regulated applications.

Q: Does packaging format affect substitution eligibility?

A: All substitute parts use the 16-SOIC surface mount package with identical dimensions (0.154", 3.90mm width). Packaging variations (Tube, Tape & Reel, or unspecified) relate to supply format only and do not affect electrical or mechanical compatibility.

Q: What is the difference between CD74HC194M96 and CD74HC194MT?

A: Both are Texas Instruments products with identical electrical specifications. CD74HC194M96 is supplied in Tape & Reel format and maintains Active status. CD74HC194MT is Discontinued at DiGi Electronics. For new procurement, CD74HC194M96 is preferred due to superior availability.