74AC00SJX NAND Gate IC Equivalent & Substitute Parts

Part Overview

The 74AC00SJX is a 4-channel 2-input NAND gate logic IC manufactured by onsemi in 14-SOP surface mount packaging. This part is currently obsolete, making equivalent and substitute parts necessary for ongoing design support, production continuity, and component sourcing. The 74AC series represents a standard logic family with multiple manufacturers offering compatible alternatives across different package configurations and product statuses.

Key Parameters

Parameter	Value
Logic Type	NAND Gate
Number of Circuits	4
Number of Inputs	2
Voltage Supply Range	2V ~ 6V
Current - Quiescent (Max)	2 µA
Current - Output High/Low	24mA / 24mA
Input Logic Level - Low	0.9V ~ 1.65V
Input Logic Level - High	2.1V ~ 3.85V
Max Propagation Delay	8ns @ 5V, 50pF
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	14-SOIC (0.209", 5.30mm Width)
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the 74AC00SJX is determined by the following critical parameters:

Logic Function: All substitutes must be 4-channel 2-input NAND gates
Electrical Specifications: Supply voltage range, quiescent current, output current, input logic levels, and propagation delay must be compatible
Operating Temperature Range: Must support the required thermal environment
Package Compatibility: Physical dimensions and pin configuration must match or be mechanically compatible
Mounting Type: All substitutes are surface mount devices
Regulatory Compliance: RoHS and REACH status for end-use requirements

Substitute parts are grouped into three categories:

Direct Package Equivalents (14-SOIC): Parts with identical or compatible 14-SOIC packaging
Alternative Package Variants (14-TSSOP): Parts with different surface mount packages but identical electrical performance
Parametric Equivalents: Parts with slightly different electrical specifications but functionally compatible within system constraints

Parameter Comparison

Part Number	Manufacturer	Package	Voltage Supply	Quiescent Current (Max)	Output Current	Propagation Delay	Operating Temp	Product Status	RoHS Status
74AC00SJX	onsemi	14-SOIC (5.30mm)	2V ~ 6V	2 µA	24mA / 24mA	8ns @ 5V	-40°C ~ 85°C	Obsolete	REACH Unaffected
74AC00MTCX	onsemi	14-TSSOP (4.40mm)	2V ~ 6V	2 µA	24mA / 24mA	8ns @ 5V	-40°C ~ 85°C	Active	ROHS3 Compliant
74AC00SCX	onsemi	14-SOIC (3.90mm)	2V ~ 6V	2 µA	24mA / 24mA	8ns @ 5V	-40°C ~ 85°C	Active	ROHS3 Compliant
CD74AC00M	Harris Corporation	14-SOIC (3.90mm)	1.5V ~ 5.5V	4 µA	24mA / 24mA	7.3ns @ 5V	-55°C ~ 125°C	Obsolete	RoHS non-compliant
CD74AC00M96	Texas Instruments	14-SOIC (3.90mm)	1.5V ~ 5.5V	4 µA	24mA / 24mA	7.3ns @ 5V	-55°C ~ 125°C	Active	ROHS3 Compliant
SN74AC00D	Texas Instruments	14-SOIC (3.90mm)	2V ~ 6V	2 µA	24mA / 24mA	8ns @ 5V	-40°C ~ 85°C	Discontinued at DiGi Electronics	ROHS3 Compliant
SN74AC00DR	Texas Instruments	14-SOIC (3.90mm)	2V ~ 6V	2 µA	24mA / 24mA	8ns @ 5V	-40°C ~ 85°C	Active	ROHS3 Compliant
SN74AC00NSR	Texas Instruments	14-SOIC (5.30mm)	2V ~ 6V	2 µA	24mA / 24mA	8ns @ 5V	-40°C ~ 85°C	Active	ROHS3 Compliant

Engineering Selection Recommendations

For Direct Replacement (Same Electrical Specifications and Package Dimensions):

SN74AC00NSR (Texas Instruments): Identical electrical performance to 74AC00SJX with matching 14-SOIC (5.30mm) package dimensions. Active product status with ROHS3 compliance. Recommended for new designs and production continuity.
SN74AC00DR (Texas Instruments): Identical electrical specifications with 14-SOIC (3.90mm) package. Active status and ROHS3 compliant. Suitable where compact packaging is acceptable.

For Active Product Status with Equivalent Performance:

74AC00MTCX (onsemi): Maintains identical electrical specifications to the original part. 14-TSSOP package offers reduced footprint. Active status with ROHS3 compliance. Suitable for space-constrained applications.
74AC00SCX (onsemi): Same manufacturer as original part with identical electrical performance. 14-SOIC (3.90mm) package. Active status with ROHS3 compliance and highest inventory availability (15,865 pcs).

For Extended Operating Temperature Range:

CD74AC00M96 (Texas Instruments): Supports -55°C to 125°C operating range versus -40°C to 85°C of original part. Slightly wider supply voltage range (1.5V ~ 5.5V). Active status with ROHS3 compliance. Suitable for industrial and automotive applications requiring extended temperature performance.

Parts to Avoid:

CD74AC00M (Harris Corporation): Obsolete status and RoHS non-compliant. Not recommended for new designs.
SN74AC00D (Texas Instruments): Discontinued at DiGi Electronics. Limited availability for ongoing production.

Frequently Asked Questions (FAQ)

Q: Can I use 74AC00SCX as a direct replacement for 74AC00SJX?

A: Yes. Both parts share identical electrical specifications (2V ~ 6V supply, 2 µA quiescent current, 8ns propagation delay, -40°C ~ 85°C operating range). The 74AC00SCX uses a 14-SOIC (3.90mm) package versus the original 5.30mm width. Pin configuration and functionality are identical. The 74AC00SCX is active with ROHS3 compliance.

Q: What is the difference between 14-SOIC (5.30mm) and 14-SOIC (3.90mm) packages?

A: Both are 14-pin SOIC packages with identical pin pitch and electrical compatibility. The difference is package width: 5.30mm versus 3.90mm. This affects PCB footprint size but does not impact electrical performance or pin functionality. Verify PCB layout compatibility before substitution.

Q: Why would I choose CD74AC00M96 over SN74AC00DR?

A: CD74AC00M96 offers extended operating temperature range (-55°C to 125°C) and wider supply voltage tolerance (1.5V ~ 5.5V) compared to SN74AC00DR (-40°C to 85°C, 2V ~ 6V). Select CD74AC00M96 for applications requiring industrial or automotive temperature specifications. For standard commercial temperature ranges, SN74AC00DR is sufficient.

Q: Is 74AC00MTCX compatible with designs using 14-SOIC packages?

A: 74AC00MTCX uses 14-TSSOP packaging, which differs from 14-SOIC. While pin count and electrical function are identical, the physical footprint is different. PCB layout modification is required. TSSOP packages are typically smaller and narrower than SOIC packages. Verify PCB design compatibility before substitution.

Q: What does ROHS3 compliance mean for component selection?

A: ROHS3 compliance indicates the part meets Restriction of Hazardous Substances Directive requirements, restricting lead and other hazardous materials. For applications subject to EU regulations or customer requirements, select ROHS3 compliant parts. All active substitute parts listed are ROHS3 compliant except CD74AC00M.

Q: Can I substitute parts with different quiescent current specifications?

A: The original 74AC00SJX specifies 2 µA maximum quiescent current. CD74AC00M and CD74AC00M96 specify 4 µA. For power-sensitive applications, maintain the 2 µA specification. For general applications, 4 µA difference is typically acceptable. Evaluate system power budget requirements before substitution.

Q: Which substitute offers the best inventory availability?

A: 74AC00SCX offers the highest inventory (15,865 pcs new original in stock). This part maintains identical electrical specifications to the original and is active with ROHS3 compliance, making it the optimal choice for production continuity and long-term availability.

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