CD74HC173M Equivalent & Substitute Parts

Part Overview

The CD74HC173M is a D-Type flip-flop logic integrated circuit manufactured by Texas Instruments, featuring 1 element with 4-bit configuration and tri-state, non-inverted outputs. This component operates as a master reset function device in the 74HC logic series and is housed in a 16-SOIC surface mount package.

The CD74HC173M carries a Last Time Buy product status, indicating that Texas Instruments has discontinued active production. This status necessitates identification of equivalent substitute parts to ensure design continuity and supply chain reliability for applications currently utilizing this component.

Key Parameters

Parameter	Value
Manufacturer Part Number	CD74HC173M
Manufacturer	Texas Instruments
Series	74HC
Type	D-Type Flip Flop
Number of Elements	1
Number of Bits per Element	4
Output Type	Tri-State, Non-Inverted
Clock Frequency	60 MHz
Voltage Supply Range	2V to 6V
Operating Temperature Range	-55°C to 125°C
Package Type	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant

Substitute Part Grouping Explanation

Substitution eligibility for the CD74HC173M is determined by the following critical parameters:

Mandatory Matching Parameters:

Package Type: 16-SOIC (0.154", 3.90mm Width)
Mounting Type: Surface Mount
Series: 74HC
Type: D-Type Flip Flop
Number of Elements: 1
Number of Bits per Element: 4
Voltage Supply Range: 2V to 6V
Trigger Type: Positive Edge
Function: Master Reset

Allowable Variation Parameters:

Clock Frequency: Substitute must meet or exceed 60 MHz
Max Propagation Delay: Substitute must meet or be faster than 34ns @ 6V, 50pF
Current Output High/Low: Substitute must support minimum 7.8mA
Quiescent Current: Substitute specifications acceptable if within logic series tolerances
Operating Temperature Range: Substitute must support minimum -55°C to 125°C or equivalent industrial range
Output Type: Tri-State configuration required; complementary outputs acceptable for functional equivalence

The substitute parts listed below satisfy these criteria and are qualified as direct replacements for the CD74HC173M in applications requiring D-Type flip-flop logic with 4-bit configuration and tri-state output control.

Parameter Comparison

Parameter	CD74HC173M (Main)	CD74HC173M96	74HC173D,653	MC74HC175ADG	MC74HC175ADR2G
Manufacturer	Texas Instruments	Texas Instruments	NXP Semiconductors	onsemi	onsemi
Product Status	Last Time Buy	Active	Active	Active	Active
Type	D-Type	D-Type	D-Type	D-Type	D-Type
Number of Bits per Element	4	4	4	4	4
Output Type	Tri-State, Non-Inverted	Tri-State, Non-Inverted	Tri-State, Non-Inverted	Complementary	Complementary
Clock Frequency	60 MHz	60 MHz	95 MHz	35 MHz	35 MHz
Max Propagation Delay @ 6V, 50pF	34ns	34ns	30ns	22ns	22ns
Current - Output High, Low	7.8mA, 7.8mA	7.8mA, 7.8mA	7.8mA, 7.8mA	5.2mA, 5.2mA	5.2mA, 5.2mA
Voltage - Supply	2V to 6V	2V to 6V	2V to 6V	2V to 6V	2V to 6V
Current - Quiescent (Iq)	8 µA	8 µA	4 µA	4 µA	4 µA
Operating Temperature	-55°C to 125°C	-55°C to 125°C	-40°C to 125°C	-55°C to 125°C	-55°C to 125°C
Package / Case	16-SOIC (0.154", 3.90mm Width)	16-SOIC (0.154", 3.90mm Width)	16-SOIC (0.154", 3.90mm Width)	16-SOIC (0.154", 3.90mm Width)	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	Not specified	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitute: CD74HC173M96

The CD74HC173M96 is the manufacturer-recommended direct substitute from Texas Instruments. This part maintains identical electrical specifications, output configuration (tri-state, non-inverted), and operating parameters as the CD74HC173M. The primary distinction is packaging format: CD74HC173M96 is supplied in Cut Tape (CT) and Digi-Reel format rather than tube packaging. This part carries Active product status, ensuring continued availability and supply chain stability. Current inventory of 4,553 units supports immediate procurement.

Secondary Substitute: 74HC173D,653

The 74HC173D,653 from NXP Semiconductors provides functional equivalence with enhanced performance characteristics. This part exceeds the clock frequency specification (95 MHz versus 60 MHz) and delivers faster propagation delay (30ns versus 34ns). The lower quiescent current (4 µA versus 8 µA) offers improved power efficiency. Operating temperature range is -40°C to 125°C, which covers standard industrial applications but does not extend to the full -55°C lower limit. This part is supplied in bulk packaging and maintains Active product status with substantial inventory availability (17,076 units).

Tertiary Substitutes: MC74HC175ADG and MC74HC175ADR2G

The onsemi MC74HC175 series parts (MC74HC175ADG in tube packaging and MC74HC175ADR2G in tape and reel format) provide functional substitution with output type variation. These parts feature complementary output configuration rather than tri-state, non-inverted outputs. Clock frequency is reduced to 35 MHz, and propagation delay is improved to 22ns. Output current capability is lower at 5.2mA. These parts are suitable only for applications where complementary output logic is functionally compatible with the original design. Both maintain Active product status and ROHS3 compliance.

Frequently Asked Questions (FAQ)

Q: Can CD74HC173M96 be used as a direct replacement for CD74HC173M?

A: Yes. CD74HC173M96 is the manufacturer-recommended substitute from Texas Instruments. Both parts share identical electrical specifications, output configuration, and operating parameters. The difference is packaging format only: CD74HC173M96 is supplied in Cut Tape and Digi-Reel format rather than tube. Pin configuration and functional behavior are identical.

Q: What is the key difference between the NXP 74HC173D,653 and the Texas Instruments CD74HC173M?

A: The 74HC173D,653 provides superior performance with higher clock frequency (95 MHz versus 60 MHz), faster propagation delay (30ns versus 34ns), and lower quiescent current (4 µA versus 8 µA). The operating temperature range is -40°C to 125°C, which does not extend to -55°C. Electrical compatibility is maintained across the 2V to 6V supply range and 16-SOIC package format.

Q: Why do the onsemi MC74HC175 parts have different output types?

A: The MC74HC175ADG and MC74HC175ADR2G feature complementary output configuration, which differs from the tri-state, non-inverted output of the CD74HC173M. Complementary outputs provide both true and inverted logic states simultaneously. These parts are functionally equivalent only for applications where complementary logic output is compatible with the circuit design.

Q: Are all substitute parts available in the same 16-SOIC package?

A: Yes. All substitute parts listed are housed in 16-SOIC (0.154", 3.90mm Width) surface mount packages, ensuring mechanical and electrical compatibility with existing PCB designs and sockets.

Q: What packaging options are available for each substitute?

A: CD74HC173M96 is supplied in Cut Tape (CT) and Digi-Reel format. 74HC173D,653 is supplied in bulk packaging. MC74HC175ADG is supplied in tube packaging. MC74HC175ADR2G is supplied in tape and reel format. Selection depends on procurement volume and assembly process requirements.

Q: Do all substitute parts meet RoHS compliance requirements?

A: CD74HC173M96, MC74HC175ADG, and MC74HC175ADR2G are ROHS3 compliant. The 74HC173D,653 RoHS status is not specified in the provided data. Verification with the supplier is recommended if RoHS compliance is a design requirement.

Q: What is the moisture sensitivity level for these parts?

A: All listed parts carry Moisture Sensitivity Level (MSL) 1, indicating unlimited shelf life without moisture control requirements. Standard handling and storage practices are sufficient.

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