CD74HC273MG4 Equivalent & Substitute Parts

Part Overview

The CD74HC273MG4 is a D-Type flip-flop logic integrated circuit manufactured by Texas Instruments, featuring 1 element with 8-bit configuration in a 20-SOIC surface mount package. This component functions as a master reset flip-flop with positive edge triggering and non-inverted outputs. The part is currently discontinued at DiGi Electronics, making equivalent substitutes necessary for ongoing production and maintenance applications. Substitute parts must maintain identical functional characteristics, package compatibility, and electrical performance within specified operating parameters.

Substiute Parts

CD74HC273MG4

Texas InstrumentsIn Stock: 671CD74HC273MG4 Datasheet

Current PartRFQ

MC74HC273ADWR2G

onsemiIn Stock: 2388MC74HC273ADWR2G Datasheet

DirectRFQ

CD74HC273M

Texas InstrumentsIn Stock: 946CD74HC273M Datasheet

MFR RecommendedRFQ

74HC273D,653

Nexperia USA Inc.In Stock: 194774HC273D,653 Datasheet

MFR RecommendedRFQ

MC74HC273ADWG

onsemiIn Stock: 2347MC74HC273ADWG Datasheet

MFR RecommendedRFQ

MM74HC273WM

Fairchild SemiconductorIn Stock: 1990MM74HC273WM Datasheet

MFR RecommendedRFQ

MM74HC273WMX

Fairchild SemiconductorIn Stock: 2033MM74HC273WMX Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitute parts for the CD74HC273MG4 are qualified based on the following critical parameters that determine functional and mechanical compatibility:

Functional Parameters:

• Type: D-Type flip-flop architecture
• Number of Elements: 1
• Number of Bits per Element: 8
• Trigger Type: Positive Edge
• Output Type: Non-Inverted
• Function: Master Reset or Reset capability

Electrical Parameters:

• Voltage Supply Range: 2V ~ 6V
• Package / Case: 20-SOIC (0.295", 7.50mm Width)
• Mounting Type: Surface Mount

Compliance Parameters:

• RoHS Status: ROHS3 Compliant
• REACH Status: REACH Unaffected

All substitute parts listed maintain these core parameters. Variations in clock frequency, propagation delay, quiescent current, and operating temperature ranges are noted but do not disqualify substitution when the primary functional and electrical requirements are met.

Parameter Comparison

Engineering Selection Recommendations

Primary Substitutes (Active Status):

The 74HC273D,653 (Nexperia USA Inc.) is the recommended primary substitute. This part maintains full functional equivalence with the CD74HC273MG4, offers the highest clock frequency specification (122 MHz), and is currently in active production status with 1900 units in stock. It is ROHS3 compliant and REACH unaffected, meeting all regulatory requirements.

The MC74HC273ADWR2G (onsemi) and MC74HC273ADWG (onsemi) are active alternatives with identical functional specifications. Both are ROHS3 compliant and available in high quantities. The onsemi variants feature lower quiescent current (4 µA vs. 8 µA) and slightly faster propagation delay (25ns vs. 26ns), making them suitable for power-sensitive applications.

Secondary Substitutes (Discontinued Status):

The CD74HC273M (Texas Instruments) is a manufacturer-recommended equivalent from the same supplier as the original part. It maintains identical electrical characteristics and is ROHS3 compliant. However, it shares discontinued status with the original part.

Temperature-Constrained Substitutes:

The MM74HC273WM and MM74HC273WMX (Fairchild Semiconductor) offer superior propagation delay performance (23ns) but operate within a narrower temperature range (-40°C ~ 85°C). These parts are suitable only for applications not requiring the full -55°C lower temperature specification of the original part.

Frequently Asked Questions (FAQ)

Q: Can I use any of these substitute parts as a direct replacement for the CD74HC273MG4?

A: Yes, all listed substitute parts are functionally equivalent and share the same 20-SOIC package footprint. However, verify your application's operating temperature requirements. The Fairchild parts (MM74HC273WM, MM74HC273WMX) have a narrower temperature range (-40°C ~ 85°C) compared to the original specification (-55°C ~ 125°C).

Q: What is the difference between the onsemi and Nexperia substitutes?

A: Both manufacturers provide active, ROHS3-compliant alternatives. The Nexperia 74HC273D,653 offers higher clock frequency (122 MHz) and lower input capacitance (4.6 pF). The onsemi variants (MC74HC273ADWR2G, MC74HC273ADWG) feature lower quiescent current (4 µA) and are available in different packaging options (Cut Tape/Digi-Reel or Tube).

Q: Are there packaging differences between these substitutes?

A: All substitutes use the same 20-SOIC (0.295", 7.50mm Width) package. Differences exist in supplier packaging formats: Cut Tape & Digi-Reel, Tube, or Bulk. These affect handling and storage but not electrical or mechanical compatibility.

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

A: For new designs, select from active-status parts: 74HC273D,653 (Nexperia), MC74HC273ADWR2G, or MC74HC273ADWG (onsemi). All are currently in production and ROHS3 compliant. Choose based on availability, packaging preference, and specific performance requirements (clock frequency, quiescent current, or propagation delay).

Q: Do these substitutes have the same pin configuration?

A: Yes. All parts are 1-element, 8-bit D-Type flip-flops in 20-SOIC packages with identical functional pin assignments, trigger types (positive edge), and output configurations (non-inverted).

Q: What if my application requires the full -55°C to 125°C temperature range?

A: Use the Nexperia 74HC273D,653, onsemi MC74HC273ADWR2G, MC74HC273ADWG, or the Texas Instruments CD74HC273M. Avoid the Fairchild variants (MM74HC273WM, MM74HC273WMX), which are limited to -40°C ~ 85°C.