CD74HC174M Equivalent & Substitute Parts

Part Overview

The CD74HC174M is a D-type flip-flop logic integrated circuit manufactured by Texas Instruments, featuring 1 element with 6 bits per element in a 16-SOIC surface mount package. This component functions as a master reset flip-flop with positive edge triggering, operating across a 2V to 6V supply voltage range. The part is currently in Last Time Buy status, indicating end-of-life production. Identifying equivalent and substitute parts is necessary to ensure design continuity and maintain component availability for new production runs and legacy system support.

Substiute Parts

CD74HC174M

Texas InstrumentsIn Stock: 9130CD74HC174M Datasheet

Current PartRFQ

CD74HC174M96

Harris CorporationIn Stock: 5135CD74HC174M96 Datasheet

MFR RecommendedRFQ

SN74HC174DR

Texas InstrumentsIn Stock: 3512SN74HC174DR Datasheet

MFR RecommendedRFQ

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

NLV74HC174ADR2G

onsemiIn Stock: 3410NLV74HC174ADR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the CD74HC174M is determined by strict equivalence across the following critical parameters:

• Functional Type: D-type flip-flop with 1 element, 6 bits per element
• Trigger Mechanism: Positive edge triggering
• Package Format: 16-SOIC (0.154", 3.90mm Width) surface mount
• Electrical Specifications: Supply voltage 2V–6V, output current 5.2 mA, propagation delay characteristics
• Environmental Rating: Operating temperature range and moisture sensitivity

Substitute parts must maintain functional equivalence across these parameters. Variations in clock frequency, propagation delay, quiescent current, and input capacitance are acceptable provided the part operates within the specified supply voltage and temperature ranges and maintains the same package footprint and pinout.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Active Status, Full Compliance)

SN74HC174DR (Texas Instruments) and MC74HC174ADR2G (onsemi) are the preferred substitutes. Both maintain active product status and ROHS3 compliance. SN74HC174DR offers improved propagation delay (14 ns) and is available in Cut Tape and Digi-Reel packaging. MC74HC174ADR2G provides lower quiescent current (4 µA) and is supplied in Tape & Reel format. Both support the full operating temperature range of –55°C to +125°C, matching the original part's environmental specifications.

Secondary Substitutes (Active Status, Temperature Considerations)

74HC174D,653 (NXP Semiconductors) and 74HC174D-Q100J (Nexperia USA Inc.) are active alternatives with enhanced clock frequency (107 MHz) and reduced input capacitance. Both are suitable for applications not requiring the extended low-temperature operation below –40°C. The 74HC174D-Q100J carries AEC-Q100 automotive qualification, making it appropriate for automotive-grade applications.

Obsolete Alternatives (Not Recommended for New Designs)

NLV74HC174ADR2G (onsemi) and CD74HC174M96 (Harris Corporation) are obsolete and should not be selected for new production designs. These parts are retained in this reference for legacy system maintenance only.

Frequently Asked Questions (FAQ)

Q: Can SN74HC174DR directly replace CD74HC174M in existing designs?

A: Yes. SN74HC174DR maintains functional equivalence with identical pinout, package footprint (16-SOIC), and electrical operating parameters (2V–6V supply, 5.2 mA output current). The improved propagation delay (14 ns versus 28 ns) and lower input capacitance (3 pF versus 10 pF) provide performance benefits without requiring circuit redesign.

Q: What is the difference between MC74HC174ADR2G and CD74HC174M?

A: Both are functionally equivalent D-type flip-flops in 16-SOIC packages. MC74HC174ADR2G features lower quiescent current (4 µA versus 8 µA), reducing power consumption in battery-powered applications. MC74HC174ADR2G is supplied in Tape & Reel format, while CD74HC174M is supplied in Tube packaging. Both support the full –55°C to +125°C operating range.

Q: Is 74HC174D-Q100J suitable for automotive applications?

A: Yes. 74HC174D-Q100J carries AEC-Q100 automotive qualification and ROHS3 compliance, making it appropriate for automotive-grade designs. It maintains functional equivalence with CD74HC174M and operates across –40°C to +125°C.

Q: Why does SN74HC174DR specify a narrower temperature range (–40°C to +85°C)?

A: SN74HC174DR is rated for a narrower operating temperature range than CD74HC174M (–55°C to +125°C). Applications requiring operation below –40°C or above +85°C must use MC74HC174ADR2G, 74HC174D,653, or 74HC174D-Q100J, which support extended temperature ranges.

Q: Are there packaging differences between substitute parts?

A: All substitute parts use the 16-SOIC (0.154", 3.90mm Width) surface mount package with identical pinout. Packaging format (Tube, Tape & Reel, Bulk, Cut Tape) affects supply and handling but does not impact electrical or mechanical compatibility.

Q: Which substitute offers the best power efficiency?

A: MC74HC174ADR2G and NLV74HC174ADR2G both feature reduced quiescent current (4 µA versus 8 µA), reducing standby power consumption by 50%. For active applications, SN74HC174DR and 74HC174D,653 offer faster propagation delays, reducing dynamic power dissipation in high-frequency switching scenarios.