74HC173DB,118 Equivalent & Substitute Parts

Part Overview

The 74HC173DB,118 is a D-Type flip-flop logic integrated circuit manufactured by Nexperia USA Inc., configured as a single element with 4-bit parallel data storage capability. This component features positive edge triggering, tri-state non-inverted outputs, and master reset functionality. The part is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The 74HC series base platform ensures functional compatibility across multiple package and manufacturer variants.

Substiute Parts

74HC173DB,118

Nexperia USA Inc.In Stock: 92474HC173DB,118 Datasheet

Current PartRFQ

74HC173PW,118

Nexperia USA Inc.In Stock: 315474HC173PW,118 Datasheet

SimilarRFQ

CD74HC173MT

Texas InstrumentsIn Stock: 866CD74HC173MT Datasheet

DirectRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution for the 74HC173DB,118 is determined by strict adherence to the following electrical and mechanical parameters:

Electrical Compatibility Requirements:

• Base product number: 74HC173
• Function: Master Reset
• Type: D-Type Flip Flop
• Number of Elements: 1
• Number of Bits per Element: 4
• Output Type: Tri-State, Non-Inverted
• Trigger Type: Positive Edge
• Voltage Supply Range: 2V ~ 6V
• Operating Temperature Range: -40°C ~ 125°C (minimum)

Mechanical Compatibility Requirements:

• Mounting Type: Surface Mount
• Pin count: 16 pins
• Package family: SSOP, TSSOP, or SOIC variants

Substitutes are grouped by package type. The 74HC173PW,118 maintains identical electrical specifications with a different package footprint (16-TSSOP vs. 16-SSOP). The CD74HC173MT from Texas Instruments provides functional equivalence within the 74HC173 family but with measurable differences in propagation delay and quiescent current specifications.

Parameter Comparison

Engineering Selection Recommendations

74HC173PW,118 (Nexperia USA Inc.) is the primary substitute for the 74HC173DB,118. Both parts share identical electrical specifications, including clock frequency, propagation delay, output current, quiescent current, and input capacitance. The 74HC173PW,118 is currently in active production status, addressing the obsolescence of the original part. The package footprint differs (16-TSSOP vs. 16-SSOP), requiring PCB layout modification. Both parts maintain ROHS3 compliance and unlimited moisture sensitivity rating.

CD74HC173MT (Texas Instruments) provides functional equivalence as a 74HC173 family member with the following trade-offs: reduced clock frequency (60 MHz vs. 95 MHz), increased propagation delay (34ns vs. 30ns), doubled quiescent current (8 µA vs. 4 µA), and increased input capacitance (10 pF vs. 4.6 pF). This part is discontinued at DiGi Electronics. Selection of this substitute is appropriate only when the extended operating temperature range (-55°C vs. -40°C minimum) is a design requirement and the electrical performance differences are acceptable for the application.

Frequently Asked Questions (FAQ)

Q: Can the 74HC173PW,118 directly replace the 74HC173DB,118 without design changes?

A: Electrical substitution is direct. The 74HC173PW,118 maintains identical functional and electrical specifications. However, the package footprint differs (16-TSSOP vs. 16-SSOP), requiring PCB layout redesign and component placement adjustment.

Q: What are the key differences between the Nexperia and Texas Instruments variants?

A: The CD74HC173MT exhibits measurable differences in three parameters: clock frequency is reduced to 60 MHz, propagation delay increases to 34ns, and quiescent current doubles to 8 µA. Input capacitance also increases to 10 pF. The Texas Instruments part supports an extended lower operating temperature limit of -55°C.

Q: Is the CD74HC173MT suitable for high-speed applications?

A: The CD74HC173MT operates at 60 MHz clock frequency with 34ns propagation delay, compared to 95 MHz and 30ns for the Nexperia variants. Application suitability depends on specific timing requirements. The increased propagation delay and reduced clock frequency may impact designs with tight timing constraints.

Q: Are all three parts RoHS compliant?

A: Yes. The 74HC173DB,118, 74HC173PW,118, and CD74HC173MT are all ROHS3 compliant with moisture sensitivity level 1 (unlimited).

Q: What packaging options are available for the 74HC173 base product?

A: The 74HC173 base product is available in three surface-mount package variants: 16-SSOP (0.209" width), 16-TSSOP (0.173" width), and 16-SOIC (0.154" width). Package selection affects PCB footprint and component density.