SN74HC174PW Equivalent & Substitute Parts

Part Overview

The SN74HC174PW is a D-Type flip-flop logic integrated circuit manufactured by Texas Instruments, featuring 1 element with 6-bit capacity and positive edge triggering. This part is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives from active manufacturers. The device operates across a 2V to 6V supply range with a maximum propagation delay of 27ns at 6V with 50pF load, making it suitable for digital logic applications requiring synchronous data storage and transfer.

Substiute Parts

SN74HC174PW

Texas InstrumentsIn Stock: 2954SN74HC174PW Datasheet

Current PartRFQ

SN74HC174PWR

Texas InstrumentsIn Stock: 3239SN74HC174PWR Datasheet

DirectRFQ

74HC174DB,112

Nexperia USA Inc.In Stock: 92774HC174DB,112 Datasheet

MFR RecommendedRFQ

74HC174PW,118

Nexperia USA Inc.In Stock: 121674HC174PW,118 Datasheet

MFR RecommendedRFQ

MC74HC174ADTR2G

onsemiIn Stock: 2960MC74HC174ADTR2G Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the SN74HC174PW is determined by the following critical parameters:

Functional Equivalence Requirements:

• Base product number must be 74HC174
• Type must be D-Type flip-flop with 1 element and 6-bit capacity
• Trigger type must be positive edge
• Output type must be non-inverted
• Voltage supply range must encompass 2V ~ 6V minimum

Electrical Compatibility Requirements:

• Clock frequency, propagation delay, output current, and quiescent current must meet or exceed the original specifications
• Input capacitance and operating temperature range are secondary parameters that may vary within acceptable limits

Physical Compatibility Requirements:

• Package type must be either 16-TSSOP or 16-SSOP (both 16-pin configurations with compatible pinouts)
• Mounting type must be surface mount
• Compliance certifications (RoHS3, MSL 1) must be maintained

Product Status Consideration:

• Active status substitutes are preferred over discontinued parts for long-term supply chain reliability

Parameter Comparison

Engineering Selection Recommendations

Primary Substitute: SN74HC174PWR

The SN74HC174PWR from Texas Instruments is the direct equivalent to the SN74HC174PW, differing only in packaging format (Tape & Reel versus Tube). This part maintains identical electrical specifications and operating parameters while offering active product status. Selection of this part eliminates any compatibility concerns and preserves the original design intent.

Secondary Substitutes: 74HC174PW,118 and 74HC174DB,112

Both Nexperia USA Inc. parts are functionally compatible with enhanced performance characteristics. The 74HC174PW,118 maintains the 16-TSSOP package format with improved clock frequency (107 MHz) and extended operating temperature range (-40°C ~ 125°C). The 74HC174DB,112 uses the 16-SSOP package variant with similar performance enhancements. Both parts carry active product status and full RoHS3 compliance.

Alternative Substitute: MC74HC174ADTR2G

The onsemi MC74HC174ADTR2G provides the widest operating temperature range (-55°C ~ 125°C) and lowest quiescent current (4 µA), with superior propagation delay performance (19ns). This part is suitable for applications requiring extended temperature operation or reduced power consumption. The higher input capacitance (10 pF) and lower clock frequency (35 MHz) represent trade-offs that must be evaluated against specific application requirements.

Compliance and Supply Chain Considerations

All substitute parts maintain ROHS3 compliance and MSL 1 ratings, ensuring compatibility with standard manufacturing and storage protocols. Active product status across all substitutes provides long-term supply chain stability compared to the discontinued SN74HC174PW.

Frequently Asked Questions (FAQ)

Q: Can I directly replace SN74HC174PW with SN74HC174PWR in my design?

A: Yes. Both parts are electrically and functionally identical, differing only in packaging format (Tube versus Tape & Reel). No circuit modifications are required.

Q: What is the difference between 16-TSSOP and 16-SSOP packages?

A: Both are 16-pin surface-mount packages with identical pinouts and electrical compatibility. The 16-TSSOP has a body width of 0.173" (4.40mm), while the 16-SSOP has a body width of 0.209" (5.30mm). PCB footprint designs must accommodate the specific package variant selected.

Q: Are the Nexperia parts (74HC174PW,118 and 74HC174DB,112) fully compatible with the original design?

A: Yes. Both Nexperia parts meet or exceed all electrical specifications of the SN74HC174PW. The enhanced clock frequency (107 MHz versus 50 MHz) and extended temperature range (-40°C ~ 125°C versus -40°C ~ 85°C) provide additional design margin without requiring circuit modifications.

Q: Why does the MC74HC174ADTR2G have different electrical specifications?

A: The MC74HC174ADTR2G is manufactured by onsemi using different process technology, resulting in variations in clock frequency (35 MHz), propagation delay (19ns), quiescent current (4 µA), and input capacitance (10 pF). These differences remain within the functional requirements of the 74HC174 logic family and do not affect pin compatibility or basic operational characteristics.

Q: Which substitute should I select for new designs?

A: For new designs, select from the active product status parts: SN74HC174PWR (Texas Instruments), 74HC174PW,118 (Nexperia), or MC74HC174ADTR2G (onsemi). The choice depends on packaging preference, temperature range requirements, and power consumption constraints specific to your application.

Q: Are all substitutes RoHS3 compliant?

A: Yes. All substitute parts listed carry ROHS3 compliance certification and MSL 1 moisture sensitivity ratings, meeting standard industrial manufacturing and storage requirements.

Q: Can I use these parts interchangeably in production?

A: Yes, provided the specific package variant (16-TSSOP or 16-SSOP) and electrical specifications match your PCB design and application requirements. Verify packaging format compatibility with your assembly process before implementation.