74HC174DB,118 Equivalent & Substitute Parts

Part Overview

The 74HC174DB,118 is a D-Type flip-flop logic integrated circuit manufactured by Nexperia USA Inc., featuring 1 element with 6-bit configuration in a 16-SSOP package. This component functions as a master reset flip-flop with positive edge triggering and non-inverted outputs. The part is currently listed as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement continuity.

Substiute Parts

74HC174DB,118

Nexperia USA Inc.In Stock: 119274HC174DB,118 Datasheet

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74HC174PW,118

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

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SN74HC174DBR

Texas InstrumentsIn Stock: 2948SN74HC174DBR Datasheet

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SN74HC174PW

Texas InstrumentsIn Stock: 2954SN74HC174PW Datasheet

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SN74HC174PWR

Texas InstrumentsIn Stock: 3239SN74HC174PWR Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the 74HC174DB,118 are identified based on the following critical parameters that determine functional and mechanical compatibility:

Core Functional Parameters:

• Base product number (74HC174)
• Type (D-Type flip-flop)
• Number of elements (1)
• Number of bits per element (6)
• Function (Master Reset)
• Output type (Non-Inverted)
• Trigger type (Positive Edge)
• Voltage supply range (2V to 6V)

Mechanical Compatibility Parameters:

• Package type (16-SSOP or 16-TSSOP)
• Mounting type (Surface Mount)
• Pin count (16 pins)

Compliance Parameters:

• RoHS3 compliance
• Moisture sensitivity level (MSL 1)

Substitutes are grouped into two categories based on package configuration: 16-SSOP variants (same footprint as main part) and 16-TSSOP variants (narrower body, same pin pitch). Electrical performance differences in clock frequency and propagation delay are noted but do not prevent substitution within the 74HC logic family.

Parameter Comparison

Engineering Selection Recommendations

For Direct Footprint Replacement (16-SSOP Package):

The SN74HC174DBR from Texas Instruments provides a direct mechanical substitute with identical 16-SSOP package dimensions (0.209", 5.30mm width). This part maintains active product status and ROHS3 compliance. The operating temperature range is reduced to -40°C to 85°C compared to the original -40°C to 125°C specification.

For Space-Constrained Designs (16-TSSOP Package):

The 74HC174PW,118 from Nexperia or SN74HC174PWR from Texas Instruments offer narrower 16-TSSOP package options (0.173", 4.40mm width) while maintaining all functional parameters. The Nexperia variant retains the extended -40°C to 125°C temperature range, while Texas Instruments variants operate to -40°C to 85°C. Both are actively produced and ROHS3 compliant.

Compliance and Regulatory Status:

All substitute parts maintain ROHS3 compliance and MSL 1 rating, ensuring compatibility with current manufacturing and environmental standards. The REACH unaffected status is consistent across all variants.

Frequently Asked Questions (FAQ)

Q: Can I substitute the 74HC174DB,118 with the 74HC174PW,118 in my design?

A: Yes. Both parts share identical functional specifications (D-Type flip-flop, 1 element, 6-bit, master reset, positive edge trigger, non-inverted output) and electrical parameters (2V to 6V supply, 5.2 mA output current, 8 µA quiescent current). The primary difference is the package type: 16-SSOP versus 16-TSSOP. If your PCB layout accommodates the narrower TSSOP footprint, this substitution is valid.

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

A: Both packages have 16 pins with identical pin pitch (0.025" / 0.635mm), but differ in body width. The 16-SSOP is 0.209" (5.30mm) wide, while the 16-TSSOP is 0.173" (4.40mm) wide. The TSSOP variant is narrower, allowing for more compact PCB layouts. Pin assignments and electrical function remain identical.

Q: Are Texas Instruments and Nexperia variants interchangeable?

A: Functionally, yes. Both manufacturers produce 74HC174 logic devices with identical pin configurations and electrical characteristics. However, Texas Instruments variants specify a reduced operating temperature range (-40°C to 85°C) compared to Nexperia variants (-40°C to 125°C). Verify your application's temperature requirements before substitution.

Q: Why is the original 74HC174DB,118 listed as obsolete?

A: The part has been discontinued by the manufacturer. Active alternatives from both Nexperia and Texas Instruments are available with equivalent or superior specifications, ensuring design continuity and long-term supply availability.

Q: Does the clock frequency difference (107 MHz vs. 50 MHz) affect substitution?

A: No. The 74HC174DB,118 specifies 107 MHz maximum clock frequency, while Texas Instruments variants specify 50 MHz. Both values exceed typical application requirements for this logic family. The lower specification from Texas Instruments does not prevent substitution in designs operating within the 50 MHz limit.

Q: What packaging formats are available for procurement?

A: The 74HC174PW,118 is supplied in Tape & Reel format. The SN74HC174DBR is supplied in Tape & Reel format. The SN74HC174PW is supplied in Tube format. The SN74HC174PWR is supplied in Tape & Reel format. Select the packaging format that matches your assembly process requirements.