MM74HC08SJ Equivalent & Substitute Parts

Part Overview

The MM74HC08SJ is a 4-channel 2-input AND gate logic IC manufactured by onsemi in a 14-SOP surface mount package. This part is classified as obsolete, which necessitates identification of functionally equivalent alternatives for new designs and production continuity. The 74HC08 series provides standard AND gate logic functionality across the CMOS 74HC family, making substitute parts readily available from multiple manufacturers with maintained electrical and mechanical compatibility.

Key Parameters

Parameter	Value
Logic Type	AND Gate
Number of Circuits	4
Number of Inputs	2
Voltage Supply Range	2V to 6V
Quiescent Current (Max)	2 µA
Output Current (High/Low)	5.2 mA / 5.2 mA
Input Logic Level Low	0.5V to 1.8V
Input Logic Level High	1.5V to 4.2V
Operating Temperature Range	-40°C to 85°C
Mounting Type	Surface Mount
Package Type	14-SOIC
Base Product Number	74HC08

Substitute Part Grouping Explanation

Substitution of the MM74HC08SJ is determined by strict equivalence across the following critical parameters:

Logic function: 4-channel AND gate with 2 inputs per channel
Electrical specifications: 2V to 6V supply voltage, 2 µA maximum quiescent current, 5.2 mA output current capability
Input/output logic levels: 0.5V–1.8V low threshold, 1.5V–4.2V high threshold
Mounting: Surface mount technology
Package: 14-pin SOIC form factor (mechanical compatibility required)

All substitute parts listed maintain these core parameters. Variations in propagation delay (15–20 ns), operating temperature range extensions, and product status do not affect functional substitutability for standard logic applications. Package width variations (3.90 mm vs. 5.30 mm) are noted but do not prevent substitution in most PCB layouts.

Parameter Comparison

Part Number	Manufacturer	Logic Type	Circuits/Inputs	Supply Voltage	Quiescent Current	Output Current	Propagation Delay	Temp Range	Package	Status
MM74HC08SJ	onsemi	AND Gate	4 / 2	2V–6V	2 µA	5.2 mA	20 ns @ 6V	-40°C to 85°C	14-SOP	Obsolete
74HC08D,653	Nexperia USA Inc.	AND Gate	4 / 2	2V–6V	2 µA	5.2 mA	15 ns @ 6V	-40°C to 125°C	14-SOIC	Active
CD74HC08M	Harris Corporation	AND Gate	4 / 2	2V–6V	2 µA	5.2 mA	15 ns @ 6V	-55°C to 125°C	14-SOIC	Obsolete
CD74HC08M96	Texas Instruments	AND Gate	4 / 2	2V–6V	2 µA	5.2 mA	15 ns @ 6V	-55°C to 125°C	14-SOIC	Active
CD74HC08MT	Texas Instruments	AND Gate	4 / 2	2V–6V	2 µA	5.2 mA	15 ns @ 6V	-55°C to 125°C	14-SOIC	Discontinued
CD74HC08QM96EP	Texas Instruments	AND Gate	4 / 2	2V–6V	2 µA	5.2 mA	15 ns @ 6V	-40°C to 125°C	14-SOIC	Active
CD74HC08QM96Q1	Texas Instruments	AND Gate	4 / 2	2V–6V	2 µA	5.2 mA	15 ns @ 6V	-40°C to 125°C	14-SOIC	Active
SN74HC08D	Texas Instruments	AND Gate	4 / 2	2V–6V	2 µA	5.2 mA	17 ns @ 6V	-40°C to 85°C	14-SOIC	Discontinued
SN74HC08DE4	Texas Instruments	AND Gate	4 / 2	2V–6V	2 µA	5.2 mA	17 ns @ 6V	-40°C to 85°C	14-SOIC	Discontinued
SN74HC08DR	Texas Instruments	AND Gate	4 / 2	2V–6V	2 µA	5.2 mA	17 ns @ 6V	-40°C to 85°C	14-SOIC	Active
SN74HC08DRG4	Texas Instruments	AND Gate	4 / 2	2V–6V	2 µA	5.2 mA	17 ns @ 6V	-40°C to 85°C	14-SOIC	Discontinued

Engineering Selection Recommendations

For new production designs, prioritize active status parts with current manufacturer support and compliance certifications. The 74HC08D,653 from Nexperia USA Inc. is actively manufactured and provides extended operating temperature range (-40°C to 125°C) with improved propagation delay (15 ns). Texas Instruments CD74HC08M96 and CD74HC08QM96Q1 are both active and offer equivalent performance; the QM96Q1 variant includes AEC-Q100 automotive qualification for applications requiring automotive-grade components.

For legacy system maintenance where the original MM74HC08SJ must be replaced, the SN74HC08DR from Texas Instruments maintains the original -40°C to 85°C temperature specification and is currently in active production. The CD74HC08QM96EP provides the same temperature range with active status.

All listed substitutes are RoHS3 compliant or REACH unaffected, supporting modern supply chain requirements. Parts marked as discontinued at DiGi Electronics may have limited availability but remain functionally equivalent for applications not requiring ongoing procurement.

Frequently Asked Questions (FAQ)

Q: Can I substitute MM74HC08SJ with any 74HC08 variant?

A: Yes, all 74HC08 variants listed maintain identical logic function, electrical specifications, and input/output thresholds. The core AND gate logic and pin configuration are standardized across manufacturers. Package form factor (14-SOIC) is consistent across all substitutes.

Q: What is the difference between 15 ns and 20 ns propagation delay?

A: Propagation delay is the time required for a logic state change at the input to produce a corresponding change at the output. The MM74HC08SJ specifies 20 ns maximum at 6V with 50 pF load, while most substitutes specify 15 ns. Faster propagation delay does not affect compatibility; it represents improved performance. Applications with timing-critical requirements benefit from the faster variants.

Q: Does package width variation (3.90 mm vs. 5.30 mm) affect PCB compatibility?

A: The MM74HC08SJ uses a 14-SOP package (5.30 mm width), while most substitutes use 14-SOIC (3.90 mm width). Both are 14-pin surface mount packages with identical pin pitch and electrical connections. PCB footprints designed for 14-SOIC will accommodate the narrower package. Verify PCB layout clearances if upgrading from SOP to SOIC; the SOIC variant is narrower and may require minor layout adjustment in space-constrained designs.

Q: Which substitute offers the widest operating temperature range?

A: CD74HC08M, CD74HC08M96, CD74HC08MT, CD74HC08QM96EP, and CD74HC08QM96Q1 all support -55°C to 125°C or -40°C to 125°C operating ranges, compared to the original -40°C to 85°C. Extended temperature range provides margin for industrial and automotive applications.

Q: Is the CD74HC08QM96Q1 suitable for automotive applications?

A: Yes. The CD74HC08QM96Q1 carries AEC-Q100 qualification and is designated for automotive-grade use. This variant is recommended for automotive systems requiring qualified components.

Q: What is the inventory status for active substitutes?

A: 74HC08D,653 (Nexperia) has 14,166 units in stock. CD74HC08M96 (Texas Instruments) has 18,278 units. CD74HC08QM96Q1 (Texas Instruments) has 18,600 units. SN74HC08DR (Texas Instruments) has 10,100 units. These active parts provide reliable long-term availability.

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