CD74HC73M Equivalent & Substitute Parts

Part Overview

The CD74HC73M is a dual JK-type flip-flop logic integrated circuit manufactured by Texas Instruments in a 14-SOIC surface mount package. This component functions as a reset-capable sequential logic element with complementary outputs, operating across a 2V to 6V supply range. The CD74HC73M is currently discontinued at DiGi Electronics, making equivalent and substitute parts necessary for ongoing design support and production requirements.

Key Parameters

Parameter	Value
Manufacturer Part Number	CD74HC73M
Manufacturer	Texas Instruments
Base Product Number	74HC73
Type	JK Type Flip-Flop
Number of Elements	2
Number of Bits per Element	1
Output Type	Complementary
Trigger Type	Negative Edge
Clock Frequency	60 MHz
Max Propagation Delay @ 6V, 50pF	28 ns
Voltage - Supply	2V ~ 6V
Current - Output High, Low	5.2 mA, 5.2 mA
Current - Quiescent (Iq)	4 µA
Input Capacitance	10 pF
Operating Temperature	-55°C ~ 125°C
Package / Case	14-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)
Product Status	Discontinued at DiGi Electronics

Substitute Part Grouping Explanation

Substitution for the CD74HC73M is determined by strict adherence to the following electrical and mechanical parameters:

Critical Substitution Parameters:

Flip-flop type: JK Type with 2 elements, 1 bit per element
Output configuration: Complementary outputs
Trigger mechanism: Negative edge triggered
Package: 14-SOIC (0.154", 3.90mm Width)
Supply voltage range: 2V ~ 6V
Operating temperature range: -55°C ~ 125°C minimum
Surface mount configuration

Substitute Categories:

Direct Manufacturer Equivalent: CD74HC73M96 (Texas Instruments) — identical electrical specifications with different packaging (Tape & Reel vs. Tube) and active product status.

Manufacturer Recommended Substitutes: 74HC73D,653 (Nexperia USA Inc.) and MC74HC73ADR2G / MC74HC73ADG (onsemi) — functionally equivalent JK flip-flops with identical core logic architecture, package footprint, and supply voltage range. Minor variations in propagation delay and input capacitance remain within acceptable substitution parameters.

Parametric Equivalent: CD74HC107M (Texas Instruments) — alternative JK flip-flop configuration with compatible electrical performance and identical package specification, though with different base product designation.

Non-Equivalent Part: 74HCT08D,653 (Nexperia USA Inc.) — listed in original substitutes but is an AND gate logic circuit, not a flip-flop. This part does not meet functional substitution criteria and is excluded from valid equivalents.

Parameter Comparison

Parameter	CD74HC73M	CD74HC73M96	74HC73D,653	MC74HC73ADG	MC74HC73ADR2G	CD74HC107M
Manufacturer	Texas Instruments	Texas Instruments	Nexperia USA Inc.	onsemi	onsemi	Texas Instruments
Type	JK Type	JK Type	JK Type	JK Type	JK Type	JK Type
Number of Elements	2	2	2	2	2	2
Output Type	Complementary	Complementary	Complementary	Complementary	Complementary	Complementary
Trigger Type	Negative Edge	Negative Edge	Negative Edge	Negative Edge	Negative Edge	Negative Edge
Clock Frequency	60 MHz	60 MHz	83 MHz	35 MHz	35 MHz	60 MHz
Max Propagation Delay @ 6V, 50pF	28 ns	28 ns	27 ns	21 ns	21 ns	29 ns
Voltage - Supply	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V
Current - Output High, Low	5.2 mA, 5.2 mA	5.2 mA, 5.2 mA	5.2 mA, 5.2 mA	5.2 mA, 5.2 mA	5.2 mA, 5.2 mA	5.2 mA, 5.2 mA
Current - Quiescent (Iq)	4 µA	4 µA	4 µA	4 µA	4 µA	4 µA
Input Capacitance	10 pF	10 pF	4.6 pF	10 pF	10 pF	10 pF
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-40°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Package / Case	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC	14-SOIC
Packaging Format	Tube	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®	Tube	Tape & Reel (TR)	Tube
Product Status	Discontinued at DiGi Electronics	Active	Active	Active	Active	Last Time Buy
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Recommendation: CD74HC73M96

CD74HC73M96 is the direct equivalent from Texas Instruments with active product status. It maintains identical electrical specifications and 14-SOIC package footprint. The only difference is packaging format (Tape & Reel vs. Tube), which does not affect circuit performance. This part is suitable for immediate substitution with no design modifications required.

Secondary Recommendations: 74HC73D,653 or MC74HC73ADR2G

Both parts are actively manufactured and meet all functional and electrical substitution criteria. 74HC73D,653 from Nexperia offers improved propagation delay (27 ns vs. 28 ns) and lower input capacitance (4.6 pF vs. 10 pF), providing marginal performance enhancement. MC74HC73ADR2G from onsemi is available in Tape & Reel format and maintains full compatibility with the original specification.

Alternative: CD74HC107M

CD74HC107M is a parametric equivalent with identical supply voltage range and package specification. However, it carries Last Time Buy status, indicating limited future availability. This part is suitable only for applications where extended production runs are not anticipated.

Compliance Verification

All recommended substitutes maintain ROHS3 compliance, MSL Level 1 rating, and identical environmental certifications (REACH Unaffected, ECCN EAR99). No additional compliance documentation is required for substitution.

Frequently Asked Questions (FAQ)

Q: Can CD74HC73M96 be used as a direct replacement for CD74HC73M?

A: Yes. CD74HC73M96 is electrically and functionally identical to CD74HC73M. The only difference is packaging format (Tape & Reel vs. Tube). Both use the same 14-SOIC footprint and require no circuit modifications.

Q: What is the difference between the onsemi MC74HC73ADG and MC74HC73ADR2G parts?

A: Both parts are functionally identical JK flip-flops from onsemi with the same electrical specifications. The difference is packaging format: MC74HC73ADG is supplied in Tube format, while MC74HC73ADR2G is supplied in Tape & Reel format. Select based on your procurement and assembly requirements.

Q: Why is 74HCT08D,653 listed in the original substitutes but not recommended?

A: 74HCT08D,653 is a 4-channel AND gate logic circuit, not a flip-flop. It does not meet the functional requirements of the CD74HC73M and cannot serve as a substitute. This part was incorrectly included in the original substitute list.

Q: Are there temperature range limitations when substituting with 74HC73D,653?

A: 74HC73D,653 operates from -40°C to 125°C, compared to the CD74HC73M range of -55°C to 125°C. If your application requires operation below -40°C, use MC74HC73ADR2G, MC74HC73ADG, or CD74HC73M96 instead.

Q: What is the significance of the different clock frequency ratings (35 MHz vs. 60 MHz vs. 83 MHz)?

A: Clock frequency ratings indicate the maximum operating frequency for the device. All substitute parts exceed the minimum frequency requirements for standard 74HC73 logic applications. Higher clock frequency ratings provide additional design margin but do not affect compatibility at lower operating frequencies.

Q: Can I mix different manufacturers' parts in the same production run?

A: Yes. All recommended substitutes are functionally equivalent with identical pin configurations, package footprints, and electrical specifications. They can be used interchangeably in the same circuit design without modification.

Q: What packaging format should I select for high-volume production?

A: Tape & Reel format (CD74HC73M96, MC74HC73ADR2G, 74HC73D,653) is standard for automated assembly processes. Tube format (CD74HC73M, MC74HC73ADG) is suitable for lower-volume or manual assembly applications.

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