SN74HC174D Equivalent & Substitute Parts

Part Overview

The SN74HC174D is a 6-bit D-type flip-flop logic integrated circuit manufactured by Texas Instruments in a 16-SOIC surface mount package. This component functions as a master reset flip-flop with positive edge triggering, commonly used in digital logic applications requiring synchronous data storage and control. The SN74HC174D is currently discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing design support and procurement.

Substiute Parts

SN74HC174D

Texas InstrumentsIn Stock: 1082SN74HC174D Datasheet

Current PartRFQ

SN74HC174DR

Texas InstrumentsIn Stock: 3512SN74HC174DR Datasheet

DirectRFQ

MC74HC174ADR2G

onsemiIn Stock: 10317MC74HC174ADR2G Datasheet

DirectRFQ

74HC174D,653

NXP SemiconductorsIn Stock: 3507774HC174D,653 Datasheet

MFR RecommendedRFQ

74HC174D-Q100J

Nexperia USA Inc.In Stock: 110574HC174D-Q100J Datasheet

MFR RecommendedRFQ

MC74HC174ADG

onsemiIn Stock: 1164MC74HC174ADG Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the SN74HC174D are qualified based on the following electrical and mechanical parameters:

Core Compatibility Criteria:

• Identical logic function: D-type flip-flop, 1 element, 6-bit configuration
• Identical package: 16-SOIC (0.154", 3.90mm Width)
• Identical trigger type: Positive edge
• Identical output type: Non-Inverted
• Identical supply voltage range: 2V ~ 6V
• Identical mounting type: Surface mount
• Identical base product series: 74HC

Performance Tolerance Parameters:

• Clock frequency: 35 MHz or higher (original: 50 MHz)
• Propagation delay: 19ns or lower @ 6V, 50pF (original: 14ns)
• Output current: 5.2mA minimum (original: 5.2mA)
• Operating temperature range: Must encompass -40°C to 85°C minimum

Compliance Requirements:

• RoHS3 compliance maintained
• MSL rating: 1 (Unlimited)
• REACH status: Unaffected or compliant

Parameter Comparison

Engineering Selection Recommendations

Recommended Primary Substitutes (Active Product Status):

SN74HC174DR - Direct equivalent from Texas Instruments with identical electrical specifications and active product status. Packaging available in Cut Tape and Digi-Reel formats. Recommended for designs requiring exact performance match to the original SN74HC174D.

74HC174D,653 - NXP Semiconductors equivalent with superior clock frequency (107 MHz) and extended operating temperature range (-40°C to 125°C). Bulk packaging available. Suitable for applications requiring higher performance margins or extended temperature operation.

74HC174D-Q100J - Nexperia USA Inc. automotive-grade equivalent (AEC-Q100 qualified) with identical performance to the NXP part. Recommended for automotive and mission-critical applications requiring qualification documentation.

Alternative Substitutes (Performance Trade-offs):

MC74HC174ADR2G - onsemi equivalent with reduced clock frequency (35 MHz) and increased propagation delay (19ns). Extended operating temperature range (-55°C to 125°C) and lower quiescent current (4 µA). Suitable for low-power applications where timing margins are not critical.

MC74HC174ADG - onsemi equivalent with obsolete product status. Not recommended for new designs due to discontinued availability, despite matching electrical specifications to MC74HC174ADR2G.

Frequently Asked Questions (FAQ)

Q: Can I directly replace SN74HC174D with SN74HC174DR?

A: Yes. SN74HC174DR is a direct substitute from the same manufacturer with identical electrical and mechanical specifications. The primary difference is packaging format (Cut Tape/Digi-Reel vs. the original format) and active product status.

Q: What is the difference between the Texas Instruments and NXP versions?

A: SN74HC174DR (Texas Instruments) and 74HC174D,653 (NXP) both meet the core functional requirements. The NXP part offers higher clock frequency (107 MHz vs. 50 MHz) and extended temperature range (-40°C to 125°C vs. -40°C to 85°C), providing additional performance margin for demanding applications.

Q: Is the onsemi MC74HC174ADR2G a suitable replacement?

A: MC74HC174ADR2G is functionally compatible but with reduced performance specifications. Clock frequency is 35 MHz (vs. 50 MHz original) and propagation delay is 19ns (vs. 14ns original). This part is suitable only for applications where these reduced specifications do not impact system performance.

Q: What does the automotive-grade designation mean for 74HC174D-Q100J?

A: The AEC-Q100 qualification indicates this part meets automotive industry reliability and testing standards. It is suitable for automotive applications and environments requiring documented quality assurance, though it functions identically to the standard NXP equivalent.

Q: Are all substitute parts available in the same package?

A: Yes. All substitute parts use the 16-SOIC (0.154", 3.90mm Width) package, ensuring mechanical and electrical compatibility with the original SN74HC174D footprint.

Q: Which substitute should I choose for a new design?

A: For new designs, select based on performance requirements and product availability. SN74HC174DR provides exact performance match with active status. For applications requiring extended temperature range or higher performance margin, use 74HC174D,653 or 74HC174D-Q100J. Avoid MC74HC174ADG due to obsolete status.