MM74HC273MTCX Equivalent & Substitute Parts

Part Overview

The MM74HC273MTCX is a D-Type flip-flop logic integrated circuit manufactured by onsemi, featuring 1 element with 8-bit configuration in a 20-TSSOP surface mount package. This component functions as a master reset flip-flop with positive edge triggering and non-inverted output. The part is currently active in production with ROHS3 compliance and unlimited moisture sensitivity rating.

Equivalent and substitute parts are necessary when the primary part becomes unavailable, when alternative packaging formats are required for manufacturing processes, or when design specifications allow for compatible alternatives from different manufacturers that meet the same electrical and mechanical requirements.

Key Parameters

Parameter	Value
Manufacturer Part Number	MM74HC273MTCX
Manufacturer	onsemi
Series	74HC
Type	D-Type Flip-Flop
Number of Elements	1
Number of Bits per Element	8
Output Type	Non-Inverted
Trigger Type	Positive Edge
Function	Master Reset
Clock Frequency	78 MHz
Max Propagation Delay @ 6V, 50pF	23 ns
Voltage Supply Range	2V to 6V
Current Output High/Low	5.2 mA / 5.2 mA
Quiescent Current (Iq)	8 µA
Input Capacitance	7 pF
Operating Temperature Range	-40°C to 85°C
Package Type	20-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
Packaging Format	Tape & Reel (TR)
Product Status	Active
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the MM74HC273MTCX is determined by the following critical parameters:

Core Functional Requirements:

Series: 74HC (logic family compatibility)
Type: D-Type Flip-Flop
Number of Elements: 1
Number of Bits per Element: 8
Output Type: Non-Inverted
Trigger Type: Positive Edge
Function: Master Reset or Reset capability
Package Type: 20-TSSOP or 20-SSOP (mechanically compatible footprints)
Mounting Type: Surface Mount

Electrical Compatibility Parameters:

Voltage Supply Range: 2V to 6V (must encompass or match)
Output Current Capability: 5.2 mA minimum (High and Low)
Quiescent Current: 8 µA maximum
Operating Temperature: -40°C minimum to 85°C minimum (must meet or exceed)

Compliance Requirements:

RoHS Status: ROHS3 Compliant
Moisture Sensitivity Level: 1 (Unlimited)
REACH Status: REACH Unaffected

Substitute parts meeting these criteria are functionally interchangeable at the circuit level. Variations in clock frequency, propagation delay, and input capacitance do not preclude substitution when the substitute part meets or exceeds the performance envelope required by the application.

Parameter Comparison

Part Number	Manufacturer	Clock Frequency (MHz)	Max Propagation Delay @ 6V, 50pF (ns)	Output Current High/Low (mA)	Quiescent Current (µA)	Input Capacitance (pF)	Operating Temperature (°C)	Package Type	Packaging Format	Product Status
MM74HC273MTCX	onsemi	78	23	5.2 / 5.2	8	7	-40 to 85	20-TSSOP	Tape & Reel	Active
MC74HC273ADTG	onsemi	35	25	7.8 / 7.8	4	10	-55 to 125	20-TSSOP	Tube	Active
MC74HC273ADTR2G	onsemi	35	25	7.8 / 7.8	4	10	-55 to 125	20-TSSOP	Tape & Reel	Active
NLV74HC273ADTR2G	onsemi	35	25	7.8 / 7.8	4	10	-55 to 125	20-TSSOP	Tape & Reel	Obsolete
74HC273PW,118	Nexperia USA Inc.	122	26	5.2 / 5.2	8	4.6	-40 to 125	20-TSSOP	Tape & Reel	Active
74HC273PW-Q100J	Nexperia USA Inc.	122	26	5.2 / 5.2	8	4.6	-40 to 125	20-TSSOP	Cut Tape & Digi-Reel	Active
SN74HC273DBR	Texas Instruments	60	27	5.2 / 5.2	8	3	-40 to 85	20-SSOP	Tape & Reel	Active
SN74HC273PW	Texas Instruments	36	46	5.2 / 5.2	8	3	-40 to 85	20-TSSOP	-	Discontinued at DiGi Electronics
SN74HC273PWR	Texas Instruments	60	27	5.2 / 5.2	8	3	-40 to 85	20-TSSOP	Cut Tape & Digi-Reel	Active
SN74HC273PWT	Texas Instruments	60	27	5.2 / 5.2	8	3	-40 to 85	20-TSSOP	Tape & Reel	Discontinued at DiGi Electronics
SN74HC273QPWRG4Q1	Texas Instruments	60	27	5.2 / 5.2	8	3	-40 to 125	20-TSSOP	Tape & Reel	Active

Engineering Selection Recommendations

Primary Substitutes (Active Status, Matching Temperature Range):

SN74HC273PWR and SN74HC273QPWRG4Q1 from Texas Instruments are the preferred substitutes. Both maintain active product status, meet ROHS3 compliance, and provide electrical performance within the specified envelope. SN74HC273PWR operates within the -40°C to 85°C range matching the original part, while SN74HC273QPWRG4Q1 extends the upper temperature limit to 125°C. Both are available in 20-TSSOP packaging with surface mount configuration.

Secondary Substitutes (Active Status, Extended Temperature Range):

74HC273PW,118 and 74HC273PW-Q100J from Nexperia USA Inc. are active alternatives offering extended operating temperature to 125°C. These parts provide superior clock frequency performance (122 MHz) and reduced input capacitance (4.6 pF). The 74HC273PW-Q100J carries AEC-Q100 automotive qualification. Both are available in 20-TSSOP packaging.

Tertiary Substitutes (Active Status, Package Variation):

SN74HC273DBR from Texas Instruments is functionally equivalent but uses 20-SSOP packaging (0.209", 5.30mm width) instead of 20-TSSOP. This package variation requires PCB footprint verification before selection.

Not Recommended:

NLV74HC273ADTR2G carries obsolete product status and should not be selected for new designs. SN74HC273PW and SN74HC273PWT are discontinued at DiGi Electronics and should not be used for ongoing production requirements.

Frequently Asked Questions (FAQ)

Q: Can MC74HC273ADTR2G replace MM74HC273MTCX in all applications?

A: MC74HC273ADTR2G is functionally compatible as a D-Type flip-flop with 8-bit configuration and master reset function. However, it operates at lower clock frequency (35 MHz vs. 78 MHz) and exhibits longer propagation delay (25 ns vs. 23 ns). It is suitable for applications where these performance characteristics are acceptable. The extended operating temperature range (-55°C to 125°C) provides broader environmental coverage than the original part.

Q: What is the difference between 20-TSSOP and 20-SSOP packages?

A: Both are 20-pin surface mount packages with identical pin configurations and electrical compatibility. The primary difference is physical width: 20-TSSOP measures 0.173" (4.40mm) while 20-SSOP measures 0.209" (5.30mm). PCB footprints are not interchangeable without layout modification. SN74HC273DBR uses the wider 20-SSOP package.

Q: Are Nexperia and onsemi parts interchangeable with Texas Instruments parts?

A: Yes, within the 74HC logic family. All parts listed share identical functional specifications (D-Type flip-flop, 8-bit, positive edge trigger, master reset function, non-inverted output). Electrical parameters such as supply voltage, output current, and quiescent current are equivalent across manufacturers. Propagation delay and clock frequency vary slightly but remain within acceptable tolerances for standard logic applications.

Q: Why does 74HC273PW,118 show higher clock frequency than the original part?

A: Clock frequency specification reflects the maximum operating frequency under specified test conditions. Higher clock frequency indicates superior performance margin but does not affect functional compatibility. Applications operating below the original part's 78 MHz specification will function correctly with 74HC273PW,118 at 122 MHz.

Q: Can I use SN74HC273QPWRG4Q1 in automotive applications?

A: SN74HC273QPWRG4Q1 is not marked with automotive qualification. For automotive applications requiring AEC-Q100 certification, use 74HC273PW-Q100J from Nexperia USA Inc., which carries explicit AEC-Q100 qualification.

Q: What does "Discontinued at DiGi Electronics" mean for SN74HC273PW and SN74HC273PWT?

A: This status indicates the parts are no longer stocked or actively distributed through DiGi Electronics. The parts may remain available through other distributors or as legacy inventory. For new designs and ongoing production, select from parts with Active product status.

Q: Is packaging format (Tape & Reel vs. Cut Tape) important for substitution?

A: Packaging format affects supply chain and manufacturing processes but not electrical or mechanical compatibility. Tape & Reel (TR) packaging is standard for high-volume automated assembly. Cut Tape (CT) and Digi-Reel formats are suitable for lower-volume or mixed-component requirements. Select based on production volume and assembly equipment capabilities.

Request Quote (Ships tomorrow)

Part Number

Quantity

Company

Contact Name

E-mail

Message