CD74HC597MT Equivalent & Substitute Parts

Part Overview

The CD74HC597MT is an 8-bit shift register logic IC manufactured by Texas Instruments, housed in a 16-SOIC surface mount package. This component functions as a parallel or serial to serial converter, operating across a 2V to 6V supply voltage range with an operating temperature span of -55°C to 125°C. The device is classified as Last Time Buy, indicating discontinued production status. Identifying equivalent and substitute parts is necessary to ensure design continuity, maintain supply chain flexibility, and support long-term product availability for applications requiring 8-bit shift register functionality.

Key Parameters

Parameter	Value
Logic Type	Shift Register
Number of Bits per Element	8
Number of Elements	1
Function	Parallel or Serial to Serial
Output Type	Push-Pull
Voltage - Supply	2V ~ 6V
Operating Temperature	-55°C ~ 125°C
Mounting Type	Surface Mount
Package / Case	16-SOIC (0.154", 3.90mm Width)
Series	74HC
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the CD74HC597MT is determined by strict alignment with the following critical parameters: logic type (shift register), bit configuration (8-bit, 1 element), functional capability (parallel or serial to serial conversion), output type (push-pull), supply voltage range (2V ~ 6V), operating temperature range (-55°C ~ 125°C), surface mount mounting type, and 16-SOIC package specification.

Substitute parts are grouped into two categories:

Direct Parametric Equivalents: Parts that match all critical parameters including the CD74HC597M96 (Texas Instruments, Cut Tape packaging) and MC74HC597ADR2G (onsemi, Tape & Reel packaging). These parts maintain identical functional specifications and package footprint, differing only in packaging format and product status (Active vs. Last Time Buy).

Manufacturer-Recommended Alternatives: Parts designated as MFR Recommended include the 74HC597D,653 (Nexperia USA Inc.) and MC74HC597ADG (onsemi). These maintain core shift register functionality, 8-bit configuration, push-pull output, and compatible voltage/temperature specifications within the 16-SOIC package family.

Functional Variant: The 74HC74D,653 (NXP Semiconductors) represents a functional alternative within the 74HC logic series but operates as a dual D-type flip-flop rather than a shift register, making it suitable only for applications where flip-flop functionality can replace shift register requirements.

Parametric Alternative: The CD74HC166M96 (Texas Instruments) functions as an 8-bit shift register with identical electrical and package specifications but operates as a high-speed variant within the same product family.

Parameter Comparison

Part Number	Manufacturer	Logic Type	Bits per Element	Function	Output Type	Voltage Supply	Operating Temp	Package	Product Status
CD74HC597MT	Texas Instruments	Shift Register	8	Parallel or Serial to Serial	Push-Pull	2V ~ 6V	-55°C ~ 125°C	16-SOIC	Last Time Buy
CD74HC597M96	Texas Instruments	Shift Register	8	Parallel or Serial to Serial	Push-Pull	2V ~ 6V	-55°C ~ 125°C	16-SOIC	Active
CD74HC166M96	Texas Instruments	Shift Register	8	Parallel or Serial to Serial	Push-Pull	2V ~ 6V	-55°C ~ 125°C	16-SOIC	Active
74HC597D,653	Nexperia USA Inc.	Shift Register	8	Parallel to Serial	Push-Pull	2V ~ 6V	-40°C ~ 125°C	16-SOIC	Active
MC74HC597ADR2G	onsemi	Shift Register	8	Parallel or Serial to Serial	Push-Pull	2V ~ 6V	-55°C ~ 125°C	16-SOIC	Active
MC74HC597ADG	onsemi	Shift Register	8	Parallel or Serial to Serial	Push-Pull	2V ~ 6V	-55°C ~ 125°C	16-SOIC	Active
74HC74D,653	NXP Semiconductors	Flip Flop (D-Type)	1	Set/Reset	Complementary	2V ~ 6V	-40°C ~ 125°C	14-SOIC	Active

Engineering Selection Recommendations

Primary Substitutes (Direct Equivalents): CD74HC597M96 and MC74HC597ADR2G are the preferred substitutes for CD74HC597MT applications. Both maintain identical functional specifications, electrical parameters, and 16-SOIC package footprint. CD74HC597M96 offers the advantage of Texas Instruments manufacturing continuity, while MC74HC597ADR2G provides onsemi sourcing with equivalent performance characteristics. Both parts carry Active product status, ensuring ongoing availability and supply chain stability.

Secondary Substitutes (Manufacturer-Recommended): 74HC597D,653 (Nexperia) and MC74HC597ADG (onsemi) function as shift registers with compatible 8-bit, push-pull output specifications and 16-SOIC packaging. The 74HC597D,653 operates within a narrower temperature range (-40°C to 125°C) compared to the original part's -55°C to 125°C specification. MC74HC597ADG maintains the full temperature range and is available in Tube packaging format.

Functional Alternative (Limited Scope): 74HC74D,653 is suitable only for applications where dual D-type flip-flop functionality can replace shift register requirements. This part operates in a 14-SOIC package and is not pin-compatible with the CD74HC597MT.

Compliance Considerations: All substitute parts maintain ROHS3 compliance, MSL Level 1 (Unlimited), and REACH Unaffected status, matching the original part's regulatory requirements.

Frequently Asked Questions (FAQ)

Q: Can CD74HC597M96 directly replace CD74HC597MT in existing designs? A: Yes. CD74HC597M96 maintains identical functional specifications, electrical parameters, supply voltage range (2V ~ 6V), operating temperature range (-55°C ~ 125°C), output type (push-pull), and 16-SOIC package footprint. The only difference is packaging format (Cut Tape & Digi-Reel vs. Tape & Reel) and Active product status.

Q: What is the difference between CD74HC597MT and CD74HC166M96? A: Both are 8-bit shift registers with identical electrical specifications and 16-SOIC packaging. CD74HC166M96 is designated as a high-speed variant within the Texas Instruments 74HC product family. Functional compatibility depends on specific application requirements for shift register operation.

Q: Why does 74HC597D,653 have a narrower operating temperature range? A: The 74HC597D,653 from Nexperia operates from -40°C to 125°C, compared to the original CD74HC597MT range of -55°C to 125°C. Applications requiring operation below -40°C must use the original part or alternatives maintaining the -55°C minimum specification.

Q: Is 74HC74D,653 a suitable substitute? A: No, not for direct substitution. The 74HC74D,653 is a dual D-type flip-flop (2 elements, 1 bit each) rather than an 8-bit shift register. It operates in a 14-SOIC package and is not pin-compatible. Use only if application logic can be redesigned to use flip-flop functionality instead of shift register functionality.

Q: What packaging options are available for 74HC597 shift registers? A: Substitute parts are available in multiple packaging formats: Cut Tape & Digi-Reel (CD74HC597M96), Tape & Reel (CD74HC597MT, MC74HC597ADR2G), and Tube (MC74HC597ADG). All maintain the 16-SOIC package footprint and are suitable for surface mount assembly.

Q: Are all substitute parts RoHS compliant? A: Yes. All listed substitute parts maintain ROHS3 compliance status, matching the original CD74HC597MT specification.

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