MM74HC08SJX AND Gate IC Equivalent & Substitute Parts

Part Overview

The MM74HC08SJX is a 4-channel 2-input AND gate logic IC manufactured by onsemi in 14-SOP surface mount packaging. This part is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The 74HC08 series represents a standard logic gate function across multiple manufacturers, with several active alternatives available that maintain functional and electrical compatibility.

Key Parameters

Parameter	Value
Logic Type	AND Gate
Number of Circuits	4
Number of Inputs	2
Voltage Supply Range	2V to 6V
Current - Quiescent (Max)	2 µA
Current - Output High/Low	5.2mA / 5.2mA
Input Logic Level - Low	0.5V to 1.8V
Input Logic Level - High	1.5V to 4.2V
Max Propagation Delay @ 6V, 50pF	15ns to 20ns
Operating Temperature Range	-40°C to 125°C
Mounting Type	Surface Mount
Package Type	14-SOIC
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the MM74HC08SJX is determined by strict equivalence across the following electrical and mechanical parameters:

Core Functional Parameters:

Logic type: AND Gate
Circuit count: 4 channels
Input count: 2 inputs per channel
Supply voltage range: 2V to 6V minimum
Output current capability: 5.2mA minimum
Propagation delay: 20ns maximum at 6V, 50pF load

Mechanical Compatibility:

Mounting type: Surface Mount
Package family: 14-SOIC (0.154" width, 3.90mm)
Pin count: 14

Environmental & Compliance:

Operating temperature: -40°C to 85°C minimum
RoHS3 compliance preferred for new designs
Moisture sensitivity level: 1 (Unlimited)

All substitute parts listed maintain these parameters within specification. Variations in propagation delay (15ns to 20ns) and extended temperature ranges (-55°C to 125°C) represent performance enhancements and do not affect functional substitution.

Parameter Comparison

Part Number	Manufacturer	Status	Voltage Supply	Quiescent Current	Output Current	Propagation Delay	Temp Range	Package	RoHS
MM74HC08SJX	onsemi	Obsolete	2V-6V	2 µA	5.2mA	20ns	-40°C to 85°C	14-SOP	ROHS3
MM74HC08MX	Fairchild Semiconductor	Active	2V-6V	2 µA	5.2mA	20ns	-40°C to 85°C	14-SOIC	Not specified
74HC08D,653	Nexperia USA Inc.	Active	2V-6V	2 µA	5.2mA	15ns	-40°C to 125°C	14-SOIC	ROHS3
CD74HC08M	Harris Corporation	Obsolete	2V-6V	2 µA	5.2mA	15ns	-55°C to 125°C	14-SOIC	Non-compliant
CD74HC08M96	Texas Instruments	Active	2V-6V	2 µA	5.2mA	15ns	-55°C to 125°C	14-SOIC	ROHS3
CD74HC08MT	Texas Instruments	Discontinued	2V-6V	2 µA	5.2mA	15ns	-55°C to 125°C	14-SOIC	ROHS3
CD74HC08QM96Q1	Texas Instruments	Active	2V-6V	2 µA	5.2mA	15ns	-40°C to 125°C	14-SOIC	ROHS3
SN74HC08D	Texas Instruments	Discontinued	2V-6V	2 µA	5.2mA	17ns	-40°C to 85°C	14-SOIC	ROHS3
SN74HC08DE4	Texas Instruments	Discontinued	2V-6V	2 µA	5.2mA	17ns	-40°C to 85°C	14-SOIC	ROHS3
SN74HC08DR	Texas Instruments	Active	2V-6V	2 µA	5.2mA	17ns	-40°C to 85°C	14-SOIC	ROHS3
SN74HC08DRG4	Texas Instruments	Discontinued	2V-6V	2 µA	5.2mA	17ns	-40°C to 85°C	14-SOIC	ROHS3

Engineering Selection Recommendations

For New Designs (Active Parts with Full Compliance):

74HC08D,653 (Nexperia) and CD74HC08M96 (Texas Instruments) are preferred for new applications. Both parts are active, ROHS3 compliant, and offer improved propagation delay (15ns) compared to the original MM74HC08SJX specification. CD74HC08M96 provides extended temperature range (-55°C to 125°C) for applications requiring broader environmental operation.

For Existing Design Replacement:

SN74HC08DR (Texas Instruments) provides direct functional replacement with active product status and ROHS3 compliance. Propagation delay of 17ns remains within acceptable margins for most 74HC08 applications.

For Legacy System Support:

CD74HC08QM96Q1 (Texas Instruments) includes AEC-Q100 automotive qualification and is suitable for designs requiring automotive-grade components with extended temperature operation.

Avoid for New Designs:

CD74HC08M (Harris Corporation) is obsolete and RoHS non-compliant. MM74HC08MX (Fairchild Semiconductor) lacks specified RoHS status. Parts marked as discontinued at DiGi Electronics (CD74HC08MT, SN74HC08D, SN74HC08DE4, SN74HC08DRG4) should not be selected for new production designs.

Frequently Asked Questions (FAQ)

Q: Can I use any 74HC08 part as a direct replacement for MM74HC08SJX?

A: Not all 74HC08 variants are equivalent. The MM74HC08SJX is a 14-SOP package, while most substitutes use 14-SOIC packaging. Although both are 14-pin surface mount packages, physical dimensions differ (5.30mm vs 3.90mm width). PCB layout compatibility must be verified before substitution. Electrical parameters (voltage, current, propagation delay) are equivalent across all listed parts.

Q: What is the difference between 14-SOP and 14-SOIC packaging?

A: Both are surface mount packages with 14 pins, but 14-SOP (Small Outline Package) is wider (5.30mm) than 14-SOIC (Small Outline Integrated Circuit, 3.90mm). Pin pitch and footprint differ, requiring PCB redesign if substituting between these package types. Electrical function remains identical.

Q: Why do some parts have faster propagation delays (15ns vs 20ns)?

A: Propagation delay variation reflects manufacturing process differences between manufacturers and product generations. All listed parts meet the 20ns maximum specification at 6V with 50pF load. Faster parts (15ns) provide performance margin but do not affect functional compatibility in standard logic applications.

Q: Is RoHS3 compliance required for my application?

A: RoHS3 compliance is mandatory for products sold in the European Union and many other markets. For new designs, select ROHS3-compliant parts (74HC08D,653, CD74HC08M96, CD74HC08QM96Q1, SN74HC08DR). Legacy designs using non-compliant parts may continue operation but cannot be sold in RoHS-regulated markets.

Q: Can I use CD74HC08QM96Q1 in non-automotive applications?

A: Yes. CD74HC08QM96Q1 is AEC-Q100 qualified for automotive use but functions identically in standard logic applications. Automotive-grade parts often feature tighter process control and extended temperature ranges, making them suitable for demanding industrial or military environments.

Q: What inventory considerations apply to these substitutes?

A: Active parts with highest inventory (74HC08D,653: 14,166 pcs; CD74HC08M96: 18,278 pcs; CD74HC08QM96Q1: 18,600 pcs; SN74HC08DR: 10,100 pcs) provide better long-term availability. Discontinued parts should not be selected for new production due to supply uncertainty.

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