74HCT174DB,112 Equivalent & Substitute Parts

Part Overview

The 74HCT174DB,112 is a D-type flip-flop logic integrated circuit manufactured by Nexperia USA Inc., configured as a single element with 6-bit parallel output capability. This component functions as a master reset flip-flop with positive edge triggering, housed in a 16-SSOP surface mount package. The part is currently classified as obsolete, necessitating identification of active equivalent alternatives that maintain functional and electrical compatibility for ongoing system support and new design implementations.

Substiute Parts

74HCT174DB,112

Nexperia USA Inc.In Stock: 83474HCT174DB,112 Datasheet

Current PartRFQ

SN74AHCT174DBR

Texas InstrumentsIn Stock: 4743SN74AHCT174DBR Datasheet

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SN74HC174DBR

Texas InstrumentsIn Stock: 2948SN74HC174DBR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the 74HCT174DB,112 is determined by the following critical parameters:

• Functional equivalence: D-type flip-flop configuration with 1 element and 6-bit output
• Package compatibility: 16-SSOP surface mount package with identical physical dimensions
• Electrical interface: Positive edge trigger, non-inverted output type, master reset function
• Supply voltage range: Minimum 4.5V ~ 5.5V compatibility
• Output characteristics: Current drive capability (output high/low specifications)
• Compliance standards: RoHS3 compliance and REACH unaffected status

The substitute parts identified below satisfy these core substitution criteria while offering active product status and improved performance characteristics.

Parameter Comparison

Engineering Selection Recommendations

SN74AHCT174DBR (Primary Substitute)

The SN74AHCT174DBR from Texas Instruments is the preferred substitute for the obsolete 74HCT174DB,112. This part maintains full functional and electrical compatibility within the specified 4.5V ~ 5.5V supply voltage range. The SN74AHCT174DBR offers superior performance with a maximum propagation delay of 8.8ns compared to the original 35ns, and increased clock frequency capability of 115 MHz. The part carries active product status, ROHS3 compliance, and REACH unaffected certification. The operating temperature range of -40°C ~ 85°C covers the majority of industrial applications; systems requiring operation above 85°C must evaluate thermal management or alternative solutions.

SN74HC174DBR (Secondary Substitute)

The SN74HC174DBR from Texas Instruments provides functional equivalence with broader supply voltage compatibility (2V ~ 6V). This part is suitable for applications where the extended voltage range provides design flexibility. The maximum propagation delay of 27ns and clock frequency of 50 MHz remain within acceptable parameters for most legacy system replacements. This part maintains ROHS3 compliance and active product status. The operating temperature range of -40°C ~ 85°C applies the same thermal limitation as the primary substitute.

Both substitute parts are available in active production status with established supply chains, ensuring long-term component availability for replacement and new design applications.

Frequently Asked Questions (FAQ)

Q: Can the SN74AHCT174DBR directly replace the 74HCT174DB,112 without circuit modifications?

A: Yes, the SN74AHCT174DBR is a direct functional replacement. Both parts share identical package geometry (16-SSOP), pin configuration, and operate within the overlapping 4.5V ~ 5.5V supply voltage range. No circuit modifications are required for pin-compatible substitution.

Q: What is the primary difference between the SN74AHCT174DBR and SN74HC174DBR substitutes?

A: The SN74AHCT174DBR is optimized for the 4.5V ~ 5.5V supply range with superior propagation delay performance (8.8ns). The SN74HC174DBR supports a broader supply voltage range (2V ~ 6V) but with slightly higher propagation delay (27ns). Selection depends on system voltage requirements and timing constraints.

Q: Are there temperature operating range limitations when substituting these parts?

A: Both substitute parts operate from -40°C ~ 85°C, which is narrower than the original 74HCT174DB,112 specification of -40°C ~ 125°C. Applications requiring operation above 85°C must implement thermal management strategies or identify alternative components rated for extended temperature ranges.

Q: Do the substitute parts maintain RoHS and REACH compliance?

A: Yes, both SN74AHCT174DBR and SN74HC174DBR are ROHS3 compliant and REACH unaffected, matching the compliance status of the original part.

Q: What packaging format is available for the substitute parts?

A: The SN74AHCT174DBR is supplied in Tape & Reel (TR) packaging. The SN74HC174DBR is also supplied in Tape & Reel (TR) packaging. Both maintain the 16-SSOP surface mount package specification.