CD74HCT165M 8-Bit Shift Register Equivalent & Substitute Parts

Part Overview

The CD74HCT165M is an 8-bit parallel-in/serial-out shift register manufactured by Texas Instruments in a 16-SOIC surface mount package. This component is discontinued at DiGi Electronics, making equivalent substitute parts necessary for ongoing production and maintenance applications. The shift register accepts parallel data input and converts it to serial output, functioning as a parallel-to-serial converter in digital logic circuits.

Key Parameters

Parameter	Value
Logic Type	Shift Register
Number of Elements	1
Number of Bits per Element	8
Function	Parallel or Serial to Serial
Output Type	Complementary
Voltage - Supply	4.5V ~ 5.5V
Operating Temperature Range	-55°C ~ 125°C (Main Part)
Mounting Type	Surface Mount
Package / Case	16-SOIC (0.154", 3.90mm Width)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the CD74HCT165M is determined by strict equivalence across the following parameters:

Logic Function: All substitutes must be 8-bit shift registers with parallel-to-serial conversion capability
Output Type: Complementary output configuration required
Supply Voltage: 4.5V ~ 5.5V operating range
Package: 16-SOIC surface mount package with 0.154" (3.90mm) width
Series: 74HCT logic family
Compliance: ROHS3 compliant, REACH unaffected, MSL 1

The substitute parts listed below meet all these criteria and are functionally interchangeable at the component level. Differences in operating temperature range, packaging format (tube vs. cut tape vs. tape & reel), and product status are noted but do not affect functional substitution.

Parameter Comparison

Parameter	CD74HCT165M (Main)	CD74HCT165M96	74HCT165D,653	74HCT165D-Q100,118
Manufacturer	Texas Instruments	Texas Instruments	Nexperia USA Inc.	Nexperia USA Inc.
Logic Type	Shift Register	Shift Register	Shift Register	Shift Register
Number of Bits	8	8	8	8
Output Type	Complementary	Complementary	Complementary	Complementary
Voltage - Supply	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C
Package / Case	16-SOIC	16-SOIC	16-SOIC	16-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Discontinued	Active	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Packaging Format	Tube	Cut Tape & Digi-Reel	Cut Tape & Digi-Reel	Tape & Reel
Grade	Standard	Standard	Standard	Automotive (AEC-Q100)

Engineering Selection Recommendations

CD74HCT165M96 is the primary direct substitute from Texas Instruments. This part maintains identical electrical specifications and operating temperature range (-55°C ~ 125°C) as the original CD74HCT165M. The only difference is packaging format (Cut Tape & Digi-Reel vs. Tube), which does not affect functional performance. This part is currently active and widely available.

74HCT165D,653 (Nexperia USA Inc.) is a functionally equivalent alternative. Operating temperature range is narrower (-40°C ~ 125°C), which is acceptable for most industrial and commercial applications. This part is active and available in Cut Tape & Digi-Reel format.

74HCT165D-Q100,118 (Nexperia USA Inc.) is qualified to AEC-Q100 automotive standards and carries the same functional specifications as 74HCT165D,653. This part is suitable for automotive-grade applications requiring automotive qualification. Operating temperature range is -40°C ~ 125°C. Packaging is Tape & Reel format.

Selection should prioritize product availability and application requirements. For standard industrial applications, CD74HCT165M96 or 74HCT165D,653 are appropriate. For automotive applications, 74HCT165D-Q100,118 is required.

Frequently Asked Questions (FAQ)

Q: Can CD74HCT165M96 be used as a direct replacement for CD74HCT165M?

A: Yes. CD74HCT165M96 is functionally identical to CD74HCT165M. Both are manufactured by Texas Instruments, share the same electrical specifications, operating temperature range, and 16-SOIC package. The difference is packaging format (Cut Tape & Digi-Reel vs. Tube), which does not affect circuit performance.

Q: What is the difference between the Texas Instruments and Nexperia substitutes?

A: Both manufacturers produce 74HCT165 shift registers that meet the same functional requirements. Texas Instruments parts (CD74HCT165M and CD74HCT165M96) operate across -55°C ~ 125°C. Nexperia parts (74HCT165D,653 and 74HCT165D-Q100,118) operate across -40°C ~ 125°C. For applications requiring the full -55°C lower temperature limit, Texas Instruments parts are required. For standard and automotive applications, Nexperia parts are suitable.

Q: Is the 74HCT165D-Q100,118 suitable for non-automotive applications?

A: Yes. The 74HCT165D-Q100,118 meets all functional requirements for standard applications. AEC-Q100 qualification is an additional certification that does not restrict use in non-automotive circuits. This part can be used as a general substitute where automotive-grade components are acceptable.

Q: Are all substitute parts in the same package?

A: Yes. All substitute parts use the 16-SOIC (0.154", 3.90mm Width) surface mount package. Pin configuration and PCB footprint are identical across all listed parts. No layout changes are required for substitution.

Q: What is the significance of MSL 1 (Unlimited) moisture sensitivity?

A: MSL 1 indicates unlimited shelf life under standard storage conditions. No special moisture control or baking procedures are required before soldering. All listed parts share this specification.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All substitute parts are ROHS3 compliant and REACH unaffected, meeting environmental and regulatory requirements for commercial and industrial applications.

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