74ACTQ00MTCX NAND Gate IC Equivalent & Substitute Parts

Part Overview

The 74ACTQ00MTCX is a 4-channel 2-input NAND gate logic IC manufactured by onsemi in 14-TSSOP surface mount packaging. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The part operates within the 4.5V to 5.5V supply voltage range and is suitable for general-purpose digital logic applications requiring NAND gate functionality.

Key Parameters

Parameter	Value
Logic Type	NAND Gate
Number of Circuits	4
Number of Inputs	2
Voltage - Supply	4.5V ~ 5.5V
Current - Quiescent (Max)	2 µA
Current - Output High, Low	24mA, 24mA
Input Logic Level - Low	0.8V
Input Logic Level - High	2V
Max Propagation Delay @ 5V, 50pF	7.5ns
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	14-TSSOP (0.173", 4.40mm Width)

Substitute Part Grouping Explanation

Substitution eligibility for the 74ACTQ00MTCX is determined by the following critical parameters:

Logic Type: NAND Gate (4 channels, 2 inputs per channel)
Supply Voltage Range: 4.5V ~ 5.5V
Output Drive Current: 24mA minimum for both high and low states
Input Logic Levels: Low ≤ 0.8V, High ≥ 2V
Package Type: 14-TSSOP or compatible 14-pin surface mount packages
Mounting: Surface mount technology

All substitute parts listed maintain these core electrical specifications. Variations in propagation delay (7.5ns to 9ns), quiescent current (2µA to 4µA), and operating temperature ranges are within acceptable tolerance for NAND gate logic substitution. Package variations between 14-TSSOP and 14-SSOP are mechanically compatible for PCB footprint purposes.

Parameter Comparison

Part Number	Manufacturer	Product Status	Quiescent Current (Max)	Propagation Delay @ 5V, 50pF	Operating Temperature	Package Type	Inventory
74ACTQ00MTCX	onsemi	Obsolete	2 µA	7.5ns	-40°C ~ 85°C	14-TSSOP	1040 Pcs
74ACT00MTCX	Fairchild Semiconductor	Active	2 µA	9ns	-40°C ~ 85°C	14-TSSOP	3816 Pcs
MC74ACT00DTR2G	onsemi	Active	4 µA	9ns	-55°C ~ 125°C	14-TSSOP	2048 Pcs
SN74ACT00DBR	Texas Instruments	Active	2 µA	9ns	-40°C ~ 85°C	14-SSOP	3181 Pcs
SN74ACT00PW	Texas Instruments	Discontinued at DiGi Electronics	2 µA	9ns	-40°C ~ 85°C	14-TSSOP	2398 Pcs
SN74ACT00PWR	Texas Instruments	Active	2 µA	9ns	-40°C ~ 85°C	14-TSSOP	2864 Pcs

Engineering Selection Recommendations

For applications currently using the obsolete 74ACTQ00MTCX, the following selection criteria apply:

Active Product Status Priority: SN74ACT00PWR (Texas Instruments), 74ACT00MTCX (Fairchild Semiconductor), and MC74ACT00DTR2G (onsemi) are all active products with confirmed ongoing availability.

Compliance Considerations: All substitute parts maintain REACH Unaffected and EAR99 ECCN classifications. SN74ACT00DBR, SN74ACT00PW, SN74ACT00PWR, 74ACT00MTCX, and MC74ACT00DTR2G carry RoHS3 compliance certification.

Temperature Range: MC74ACT00DTR2G offers an extended operating temperature range of -55°C to 125°C, suitable for industrial and automotive applications. Standard-range substitutes operate from -40°C to 85°C.

Package Compatibility: 14-TSSOP packages (74ACT00MTCX, MC74ACT00DTR2G, SN74ACT00PW, SN74ACT00PWR) provide direct footprint compatibility. SN74ACT00DBR uses 14-SSOP packaging with slightly different physical dimensions but maintains electrical pin compatibility.

Propagation Delay: The original 74ACTQ00MTCX specifies 7.5ns maximum delay. All substitutes specify 9ns maximum delay, representing a 1.5ns increase. This difference is negligible for most digital logic applications but should be verified for timing-critical circuits.

Frequently Asked Questions (FAQ)

Q: Can I directly replace 74ACTQ00MTCX with any of the listed substitutes?

A: Yes, all listed parts are electrically compatible. The 74ACTQ00MTCX, 74ACT00MTCX, MC74ACT00DTR2G, SN74ACT00DBR, SN74ACT00PW, and SN74ACT00PWR maintain identical logic functionality, supply voltage range, input/output logic levels, and output drive current specifications. Verify PCB footprint compatibility for package type selection.

Q: What is the difference between 14-TSSOP and 14-SSOP packages?

A: Both are 14-pin surface mount packages with identical pin assignments and electrical compatibility. The 14-TSSOP measures 0.173" width (4.40mm), while 14-SSOP measures 0.209" width (5.30mm). PCB footprints differ slightly; verify your design accommodates the selected package type.

Q: Why does MC74ACT00DTR2G have higher quiescent current (4µA vs 2µA)?

A: The MC74ACT00DTR2G maintains the same output drive capability and logic performance while operating across an extended temperature range (-55°C to 125°C). The increased quiescent current is within acceptable tolerance for NAND gate logic applications and does not affect functional compatibility.

Q: Is the 1.5ns propagation delay difference between 74ACTQ00MTCX (7.5ns) and substitutes (9ns) significant?

A: For most general-purpose digital logic applications, this difference is negligible. However, in timing-critical circuits with tight setup/hold time requirements or high-frequency applications, verify that the 9ns maximum delay meets your system timing specifications.

Q: Which substitute offers the best long-term availability?

A: SN74ACT00PWR (Texas Instruments) and 74ACT00MTCX (Fairchild Semiconductor) are both active products with substantial inventory levels (2864 Pcs and 3816 Pcs respectively), indicating strong ongoing production and supply chain support.

Q: Are all substitutes RoHS compliant?

A: SN74ACT00DBR, SN74ACT00PW, SN74ACT00PWR, 74ACT00MTCX, and MC74ACT00DTR2G carry RoHS3 compliance certification. The original 74ACTQ00MTCX does not specify RoHS status. Verify compliance requirements for your application.

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