74HC194DB,112 Equivalent & Substitute Parts

Part Overview

The 74HC194DB,112 is a bidirectional 4-bit shift register manufactured by Nexperia USA Inc., designed for universal shift register applications in logic circuits. This component features push-pull output configuration and operates across a 2V to 6V supply voltage range with an operating temperature span of -40°C to 125°C. The part is classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

74HC194DB,112

Nexperia USA Inc.In Stock: 83474HC194DB,112 Datasheet

Current PartRFQ

CD74HC194PW

Texas InstrumentsIn Stock: 1161CD74HC194PW Datasheet

SimilarRFQ

CD74HC194PWR

Texas InstrumentsIn Stock: 30203CD74HC194PWR Datasheet

SimilarRFQ

CD74HC194PWT

Texas InstrumentsIn Stock: 2040CD74HC194PWT Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74HC194DB,112 are qualified based on the following critical parameters that determine functional equivalence:

• Logic Type & Function: Register, Bidirectional with Universal function capability
• Bit Configuration: 1 Element, 4 Bits per Element
• Output Type: Push-Pull configuration
• Voltage Supply Range: 2V ~ 6V compatibility
• Mounting Type: Surface Mount technology
• Series Compatibility: 74HC logic family
• Compliance: ROHS3 Compliant, REACH Unaffected

The substitute parts CD74HC194PW, CD74HC194PWR, and CD74HC194PWT are manufactured by Texas Instruments and share identical functional specifications with the main part. These alternatives differ in packaging format (Tube vs. Tape & Reel) and product lifecycle status, but maintain full electrical and mechanical compatibility within the specified parameter constraints.

Parameter Comparison

Engineering Selection Recommendations

CD74HC194PWR (Texas Instruments) is the primary recommended substitute. This part maintains Active product status, ensuring long-term availability and supply chain stability. It provides the widest operating temperature range (-55°C to 125°C), exceeding the original specification. ROHS3 compliance and REACH Unaffected status align with current regulatory requirements.

CD74HC194PW and CD74HC194PWT are secondary alternatives suitable for applications where Last Time Buy status is acceptable. Both parts offer identical electrical specifications and extended temperature performance compared to the original part.

Package Consideration: All Texas Instruments substitutes use 16-TSSOP packaging (0.173", 4.40mm width) versus the original 16-SSOP (0.209", 5.30mm width). PCB layout modifications are required for package migration. Pin-to-pin functional compatibility is maintained across all alternatives.

Frequently Asked Questions (FAQ)

Q: Are the Texas Instruments CD74HC194 variants pin-compatible with the Nexperia 74HC194DB,112?

A: All substitute parts maintain identical pin functionality and signal definitions. However, the package footprint differs between 16-SSOP and 16-TSSOP, requiring PCB layout redesign for physical placement.

Q: What is the difference between CD74HC194PW, CD74HC194PWR, and CD74HC194PWT?

A: These parts are electrically identical. The differences are packaging format (Tube vs. Tape & Reel) and product lifecycle status. CD74HC194PWR is Active; CD74HC194PW and CD74HC194PWT are Last Time Buy.

Q: Can I use CD74HC194PWR as a direct replacement in existing designs?

A: Electrical substitution is direct. Physical substitution requires PCB redesign due to package footprint differences between 16-SSOP and 16-TSSOP.

Q: Does the extended operating temperature range of the Texas Instruments parts affect compatibility?

A: No. The extended range (-55°C to 125°C vs. -40°C to 125°C) provides additional margin and does not impact compatibility with designs specified for the original temperature range.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All listed substitutes maintain ROHS3 compliance and REACH Unaffected status, meeting current environmental and regulatory requirements.

Q: Which substitute should I select for new designs?

A: CD74HC194PWR is recommended for new designs due to Active product status, ensuring availability throughout the design lifecycle and production phases.