MC74AC00NG NAND Gate IC Equivalent & Substitute Parts

Part Overview

The MC74AC00NG is a 4-channel 2-input NAND gate logic IC manufactured by onsemi in a 14-PDIP package. This component is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement. The MC74AC00NG operates across a 2V to 6V supply voltage range with a maximum propagation delay of 8ns at 5V with 50pF load, 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	2V ~ 6V
Current - Quiescent (Max)	4 µA
Current - Output High, Low	24mA, 24mA
Max Propagation Delay @ 5V, 50pF	8ns
Operating Temperature	-55°C ~ 125°C
Package / Case	14-DIP (0.300", 7.62mm)
Mounting Type	Through Hole
Base Product Number	74AC00

Substitute Part Grouping Explanation

Substitute parts for the MC74AC00NG are qualified based on the following criteria:

Identical logic function: 4-channel 2-input NAND gate
Compatible package: 14-DIP form factor with identical pin configuration
Overlapping supply voltage range: minimum 2V operation required
Output drive capability: 24mA minimum for both high and low states
Propagation delay: maximum 8ns at 5V with 50pF load
Through-hole mounting compatibility
Base product number alignment: 74AC00 series

All listed substitutes meet these electrical and mechanical requirements and are pin-compatible with the MC74AC00NG.

Parameter Comparison

Parameter	MC74AC00NG (onsemi)	CD74AC00E (Harris)	SN74AC00N (TI)	TC74AC00PF (Toshiba)
Logic Type	NAND Gate	NAND Gate	NAND Gate	NAND Gate
Number of Circuits	4	4	4	4
Number of Inputs	2	2	2	2
Voltage - Supply	2V ~ 6V	1.5V ~ 5.5V	2V ~ 6V	2V ~ 5.5V
Current - Quiescent (Max)	4 µA	4 µA	2 µA	4 µA
Current - Output High, Low	24mA, 24mA	24mA, 24mA	24mA, 24mA	24mA, 24mA
Max Propagation Delay @ 5V, 50pF	8ns	7.3ns	8ns	7ns
Operating Temperature	-55°C ~ 125°C	-55°C ~ 125°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	14-DIP (0.300", 7.62mm)	14-DIP (0.300", 7.62mm)	14-DIP (0.300", 7.62mm)	14-DIP (0.300", 7.62mm)
Mounting Type	Through Hole	Through Hole	Through Hole	Through Hole
Product Status	Obsolete	Obsolete	Active	Active

Engineering Selection Recommendations

SN74AC00N (Texas Instruments) is the primary recommended substitute. This part maintains identical electrical specifications to the MC74AC00NG, offers active product status ensuring continued availability, and carries ROHS3 compliance certification. The operating temperature range is narrower (-40°C to 85°C versus -55°C to 125°C), which is acceptable for most commercial and industrial applications.

TC74AC00PF (Toshiba Semiconductor and Storage) is an alternative substitute with active product status and ROHS3 compliance. This part delivers superior propagation delay performance (7ns versus 8ns) and operates within a 2V to 5.5V supply range. The operating temperature range (-40°C to 85°C) matches the SN74AC00N.

CD74AC00E (Harris Corporation) is a functional equivalent with identical operating temperature range to the MC74AC00NG (-55°C to 125°C). However, this part carries obsolete status and RoHS non-compliant certification, limiting its suitability for new designs requiring regulatory compliance.

For applications requiring the extended temperature range of -55°C to 125°C, the MC74AC00NG or CD74AC00E are the only options among the listed substitutes. For standard commercial temperature range applications, SN74AC00N or TC74AC00PF are preferred due to active product status and compliance certifications.

Frequently Asked Questions (FAQ)

Q: Can SN74AC00N directly replace MC74AC00NG in existing designs?

A: Yes, SN74AC00N is pin-compatible and electrically equivalent for the 2V to 6V supply range and -40°C to 85°C operating temperature. If your application requires operation below -40°C or above 85°C, verify that the narrower temperature range is acceptable before substitution.

Q: What is the difference between the 14-DIP and 14-PDIP package designations?

A: Both designations refer to the same 14-pin dual-in-line package with 0.300" (7.62mm) row spacing. The terminology varies by manufacturer but the physical form factor and pin configuration are identical.

Q: Why is TC74AC00PF listed as a substitute if it has a lower maximum supply voltage (5.5V versus 6V)?

A: TC74AC00PF operates within the 2V to 5.5V range, which overlaps with the MC74AC00NG's 2V to 6V range. For applications operating at or below 5.5V, TC74AC00PF is fully compatible. Applications requiring 5.5V to 6V operation must use SN74AC00N or CD74AC00E.

Q: Does lower quiescent current in SN74AC00N (2 µA versus 4 µA) affect compatibility?

A: No. Lower quiescent current is a beneficial characteristic that reduces power consumption. This does not affect functional compatibility or signal integrity.

Q: Are all listed substitutes RoHS compliant?

A: SN74AC00N and TC74AC00PF carry ROHS3 compliance certification. CD74AC00E is RoHS non-compliant. MC74AC00NG status is not specified as RoHS compliant. Verify compliance requirements for your application before selection.

Q: What is the significance of "Moisture Sensitivity Level (MSL): 1 (Unlimited)"?

A: MSL 1 indicates unlimited shelf life without moisture-related degradation concerns. This applies to MC74AC00NG and TC74AC00PF. Standard handling procedures are sufficient for storage and assembly.

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