CD74HC165MT Equivalent & Substitute Parts

Part Overview

The CD74HC165MT is an 8-bit parallel-load shift register manufactured by Texas Instruments, housed in a 16-SOIC surface mount package. This logic IC functions as a parallel or serial to serial converter with complementary outputs, operating across a 2V to 6V supply voltage range and -55°C to 125°C temperature span. The part is currently discontinued at DiGi Electronics, necessitating identification of functionally equivalent alternatives that maintain identical electrical and mechanical specifications for direct board-level substitution.

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	2V ~ 6V
Operating Temperature	-55°C ~ 125°C
Package / Case	16-SOIC (0.154", 3.90mm Width)
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the CD74HC165MT is determined by strict equivalence across the following parameters: logic type (shift register), bit configuration (8-bit, 1 element), function (parallel or serial to serial), output type (complementary), supply voltage range (2V ~ 6V), package type (16-SOIC), and mounting method (surface mount). All substitute parts listed maintain these core specifications. Operating temperature range, product status, and manufacturer identity are secondary considerations that do not preclude functional substitution when electrical and mechanical parameters align.

Parameter Comparison

Parameter	CD74HC165MT (TI)	CD74HC165M96 (TI)	MC74HC165ADR2G (onsemi)	74HC165D,653 (Nexperia)	74HC165D-Q100,118 (Nexperia)	MC74HC165ADG (onsemi)	NLV74HC165ADR2G (onsemi)
Logic Type	Shift Register	Shift Register	Shift Register	Shift Register	Shift Register	Shift Register	Shift Register
Number of Bits	8	8	8	8	8	8	8
Output Type	Complementary	Complementary	Complementary	Complementary	Complementary	Complementary	Complementary
Function	Parallel or Serial to Serial	Parallel or Serial to Serial	Parallel or Serial to Serial	Parallel or Serial to Serial	Parallel or Serial to Serial	Parallel or Serial to Serial	Parallel or Serial to Serial
Voltage - Supply	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V	2V ~ 6V
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C	-40°C ~ 125°C	-40°C ~ 125°C	-55°C ~ 125°C	-55°C ~ 125°C
Package / Case	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC	16-SOIC
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Discontinued	Active	Active	Active	Active	Active	Obsolete
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
MSL Rating	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

For direct replacement of the discontinued CD74HC165MT, CD74HC165M96 (Texas Instruments) and MC74HC165ADR2G (onsemi) are the primary selections, both maintaining active product status and full -55°C to 125°C operating range. The 74HC165D,653 (Nexperia) and 74HC165D-Q100,118 (Nexperia) are functionally equivalent with restricted operating temperature range (-40°C to 125°C) and should be selected only when application requirements do not demand the extended low-temperature specification. The 74HC165D-Q100,118 variant includes AEC-Q100 automotive qualification and is suitable for automotive-grade applications. MC74HC165ADG (onsemi) in tube packaging is equivalent but less common in cut-tape supply chains. NLV74HC165ADR2G (onsemi) carries obsolete status and should be avoided for new designs despite parametric equivalence.

Frequently Asked Questions (FAQ)

Q: Can I substitute CD74HC165MT with any of the listed alternatives without circuit modification?

A: Yes. All listed substitutes maintain identical logic function, bit configuration, output type, supply voltage range, and 16-SOIC package dimensions. Direct pin-for-pin replacement is supported without circuit redesign.

Q: What is the difference between CD74HC165M96 and CD74HC165MT?

A: Both are Texas Instruments 74HC165 shift registers in 16-SOIC packaging with identical electrical specifications. CD74HC165M96 is currently active in production, while CD74HC165MT is discontinued. They are functionally interchangeable.

Q: Why do some substitutes have -40°C minimum operating temperature instead of -55°C?

A: The 74HC165D,653 and 74HC165D-Q100,118 from Nexperia specify -40°C to 125°C operating range. This narrower range does not affect functionality within standard industrial temperature bands but may be unsuitable for applications requiring extended low-temperature operation below -40°C.

Q: Is the automotive-qualified 74HC165D-Q100,118 suitable for non-automotive applications?

A: Yes. AEC-Q100 qualification indicates enhanced reliability testing and is a superset of standard industrial requirements. This part is suitable for any application accepting the -40°C to 125°C temperature range.

Q: Should I use NLV74HC165ADR2G as a substitute?

A: No. Although parametrically equivalent, NLV74HC165ADR2G carries obsolete product status, indicating discontinued manufacturing and limited future availability. Active alternatives should be prioritized for new designs.

Q: Are there packaging differences between the substitutes?

A: CD74HC165MT, CD74HC165M96, MC74HC165ADR2G, 74HC165D,653, and NLV74HC165ADR2G are supplied in cut-tape or digi-reel format. 74HC165D-Q100,118 is supplied in tape and reel format. MC74HC165ADG is supplied in tube packaging. All use identical 16-SOIC case dimensions and are mechanically compatible with standard pick-and-place equipment.

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