NC7SP38L6X Equivalent & Substitute Parts

Part Overview

The NC7SP38L6X is a NAND Gate IC manufactured by onsemi, featuring 1 channel with 2 inputs and open drain output in a 6-MicroPak surface mount package. This component is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The part operates across a supply voltage range of 0.9V to 3.6V with a maximum quiescent current of 900 nA and propagation delay of 10ns at 3.3V with 30pF load.

Key Parameters

Parameter	Value
Logic Type	NAND Gate
Number of Circuits	1
Number of Inputs	2
Features	Open Drain
Voltage - Supply	0.9V ~ 3.6V
Current - Quiescent (Max)	900 nA
Current - Output High, Low	-, 2.6mA
Max Propagation Delay @ V, Max CL	10ns @ 3.3V, 30pF
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	6-UFDFN
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the NC7SP38L6X is based on the following critical parameters that must remain consistent:

Logic Type: NAND Gate with 1 channel and 2 inputs
Output Configuration: Open Drain
Mounting Type: Surface Mount
Functional Electrical Characteristics: Supply voltage compatibility, quiescent current, output current, propagation delay, and input logic levels

The identified substitute parts are from the 74AUP1G38 series manufactured by Nexperia USA Inc. These parts maintain functional equivalence through matching logic topology, input/output specifications, and operating characteristics within acceptable engineering tolerances. Both substitute variants (74AUP1G38GM,115 and 74AUP1G38GM,132) are active products with enhanced specifications compared to the obsolete NC7SP38L6X.

Parameter Comparison

Parameter	NC7SP38L6X	74AUP1G38GM,115	74AUP1G38GM,132
Manufacturer	onsemi	Nexperia USA Inc.	Nexperia USA Inc.
Logic Type	NAND Gate	NAND Gate	NAND Gate
Number of Circuits	1	1	1
Number of Inputs	2	2	2
Features	Open Drain	Open Drain	Open Drain
Voltage - Supply	0.9V ~ 3.6V	0.8V ~ 3.6V	0.8V ~ 3.6V
Current - Quiescent (Max)	900 nA	500 nA	500 nA
Current - Output High, Low	-, 2.6mA	-, 4mA	-, 4mA
Input Logic Level - Low	0.7V ~ 0.9V	0.7V ~ 0.9V	0.7V ~ 0.9V
Input Logic Level - High	1.6V ~ 2.1V	1.6V ~ 2V	1.6V ~ 2V
Max Propagation Delay @ V, Max CL	10ns @ 3.3V, 30pF	12.7ns @ 3.3V, 30pF	12.7ns @ 3.3V, 30pF
Operating Temperature	-40°C ~ 85°C	-40°C ~ 125°C	-40°C ~ 125°C
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Package / Case	6-UFDFN	6-XFDFN	6-XFDFN
Product Status	Obsolete	Active	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Both 74AUP1G38GM,115 and 74AUP1G38GM,132 are suitable substitutes for the obsolete NC7SP38L6X based on functional equivalence and compliance status. Key considerations for selection:

Product Status: The substitute parts are active products from Nexperia USA Inc., ensuring long-term availability and supply chain stability compared to the obsolete NC7SP38L6X.

Compliance: All parts maintain ROHS3 compliance and REACH unaffected status, meeting regulatory requirements for new designs.

Electrical Performance: The 74AUP1G38 series demonstrates improved specifications including lower quiescent current (500 nA vs. 900 nA) and extended operating temperature range (-40°C to 125°C vs. -40°C to 85°C). Output current capability is increased to 4mA, providing enhanced drive capability.

Package Compatibility: Both substitute parts use 6-XFDFN packaging (SOT886 1.45x1) compared to the 6-UFDFN of the original part. Physical footprint differences require PCB layout evaluation for direct replacement.

Propagation Delay: The substitute parts exhibit slightly longer propagation delay (12.7ns vs. 10ns at 3.3V, 30pF), which is acceptable for most logic applications but must be verified against timing-critical circuit requirements.

Frequently Asked Questions (FAQ)

Q: Can the 74AUP1G38GM series directly replace the NC7SP38L6X without PCB modifications?

A: Functional substitution is supported; however, package differences (6-UFDFN vs. 6-XFDFN) require PCB layout evaluation. Footprint compatibility must be confirmed before implementation.

Q: What are the key differences between 74AUP1G38GM,115 and 74AUP1G38GM,132?

A: Both variants are electrically identical. The part number suffix indicates different packaging configurations (Tape & Reel). Selection depends on procurement and assembly requirements.

Q: Is the increased propagation delay of the 74AUP1G38 series acceptable for my application?

A: The 2.7ns increase in propagation delay (12.7ns vs. 10ns) is within acceptable tolerances for standard logic applications. Timing-critical circuits operating near maximum frequency specifications require detailed timing analysis.

Q: Are the supply voltage ranges compatible?

A: The 74AUP1G38 series operates from 0.8V to 3.6V, which encompasses the NC7SP38L6X range of 0.9V to 3.6V. The lower minimum voltage of the substitute provides additional design flexibility.

Q: What is the impact of the extended operating temperature range?

A: The 74AUP1G38 series supports -40°C to 125°C compared to -40°C to 85°C for the NC7SP38L6X. This extended range provides greater thermal margin for applications in elevated temperature environments.

Q: Are moisture sensitivity levels equivalent?

A: Both the original and substitute parts carry MSL 1 (Unlimited) classification, indicating no moisture sensitivity constraints for storage and handling.

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