NC7ST04P5 Equivalent & Substitute Parts

Part Overview

The NC7ST04P5 is a single-channel inverter logic IC manufactured by onsemi, housed in a 5-TSSOP (SC-70-5/SOT-353) surface mount package. This component performs basic logic inversion with a single input and output, operating across a 4.5V to 5.5V supply voltage range. The part is currently discontinued at DiGi Electronics, making equivalent and substitute parts essential for ongoing design support and production continuity. Substitute parts must maintain functional equivalence while accommodating variations in electrical performance, operating temperature ranges, and package compatibility.

Key Parameters

Parameter	NC7ST04P5
Logic Type	Inverter
Number of Circuits	1
Number of Inputs	1
Voltage - Supply	4.5V ~ 5.5V
Current - Quiescent (Max)	1 µA
Current - Output High, Low	2mA, 2mA
Input Logic Level - Low	0.8V
Input Logic Level - High	2V
Max Propagation Delay @ V, Max CL	26ns @ 5.5V, 50pF
Operating Temperature	-40°C ~ 85°C
Package / Case	5-TSSOP, SC-70-5, SOT-353
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level (MSL)	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility is determined by the following critical parameters:

Logic Function: All substitutes must perform single-channel inversion (1 input, 1 output)
Package Compatibility: All substitutes must use 5-TSSOP, SC-70-5, or SOT-353 surface mount packages
Supply Voltage Range: Substitutes must operate within or encompass the 4.5V ~ 5.5V range
Input/Output Logic Levels: Substitutes must accept the same input thresholds and produce compatible output levels
Quiescent Current: Maximum 1 µA to maintain low-power operation
Propagation Delay: Substitutes with faster delays remain functionally compatible
Operating Temperature: Substitutes with extended temperature ranges provide enhanced reliability

Substitute parts are grouped into three categories:

Parametric Equivalent: NC7ST04P5X (onsemi 7ST series) — identical electrical specifications with active product status
Direct Substitutes: SN74AHCT1G04DCKR, 74AHCT1G04GW,125, CAHCT1G04QDCKRG4Q1, CAHCT1G04QDCKRQ1 — compatible inverter ICs with enhanced output drive and faster propagation delays
Enhanced Substitutes: M74VHC1GT04DFT1G, M74VHC1GT04DFT2G, SN74AHC1G04DCKR — wider supply voltage ranges and extended temperature operation

Parameter Comparison

Part Number	Manufacturer	Logic Type	Voltage - Supply	Current - Output High, Low	Max Propagation Delay @ 5V, 50pF	Operating Temperature	Package	Product Status
NC7ST04P5	onsemi	Inverter	4.5V ~ 5.5V	2mA, 2mA	26ns @ 5.5V	-40°C ~ 85°C	SC-70-5	Discontinued
NC7ST04P5X	onsemi	Inverter	4.5V ~ 5.5V	2mA, 2mA	26ns @ 5.5V	-40°C ~ 85°C	SC-70-5	Active
SN74AHCT1G04DCKR	Texas Instruments	Inverter	4.5V ~ 5.5V	8mA, 8mA	9ns @ 5V	-40°C ~ 125°C	SC-70-5	Active
74AHCT1G04GW,125	Nexperia USA Inc.	Inverter	4.5V ~ 5.5V	8mA, 8mA	7.7ns @ 5V	-40°C ~ 125°C	5-TSSOP	Active
CAHCT1G04QDCKRG4Q1	Texas Instruments	Inverter	4.5V ~ 5.5V	8mA, 8mA	7.7ns @ 5V	-40°C ~ 125°C	SC-70-5	Active
CAHCT1G04QDCKRQ1	Texas Instruments	Inverter	4.5V ~ 5.5V	8mA, 8mA	7.7ns @ 5V	-40°C ~ 125°C	SC-70-5	Active
M74VHC1GT04DFT1G	onsemi	Inverter	3V ~ 5.5V	8mA, 8mA	7.7ns @ 5V	-55°C ~ 125°C	SC-70-5	Active
M74VHC1GT04DFT2G	onsemi	Inverter	3V ~ 5.5V	8mA, 8mA	7.7ns @ 5V	-55°C ~ 125°C	SC-70-5	Active
SN74AHC1G04DCKR	Texas Instruments	Inverter	2V ~ 5.5V	8mA, 8mA	7.5ns @ 5V	-40°C ~ 85°C	SC-70-5	Active
SN74AHC1G04DCKT	Texas Instruments	Inverter	2V ~ 5.5V	8mA, 8mA	7.5ns @ 5V	-40°C ~ 85°C	SC-70-5	Discontinued

Engineering Selection Recommendations

Primary Recommendation: NC7ST04P5X

The NC7ST04P5X is the direct parametric equivalent with identical electrical specifications and active product status. This part maintains the original 2mA output drive and 26ns propagation delay while ensuring design continuity. Selection of this part requires no circuit modifications.

Secondary Recommendations for Enhanced Performance:

SN74AHCT1G04DCKR (Texas Instruments): Maintains 4.5V ~ 5.5V supply compatibility with extended temperature range (-40°C ~ 125°C) and 4× output drive (8mA). Propagation delay improves to 9ns. Suitable for applications requiring higher output current or wider temperature operation.
74AHCT1G04GW,125 (Nexperia USA Inc.): Identical electrical performance to SN74AHCT1G04DCKR with fastest propagation delay (7.7ns). Tape & Reel packaging provides cost efficiency for high-volume production.
CAHCT1G04QDCKRG4Q1 / CAHCT1G04QDCKRQ1 (Texas Instruments): AEC-Q100 automotive-qualified variants with identical performance to SN74AHCT1G04DCKR. Required for automotive applications.

Extended Voltage Range Option:

M74VHC1GT04DFT1G / M74VHC1GT04DFT2G (onsemi): Support 3V ~ 5.5V supply voltage with extended temperature range (-55°C ~ 125°C). Suitable for applications requiring lower supply voltage operation or extreme temperature environments.

Compliance Verification:

All recommended substitutes maintain ROHS3 compliance, MSL Level 1 (Unlimited), and EAR99 export classification. No additional regulatory documentation is required for substitution.

Frequently Asked Questions (FAQ)

Q: Can I use SN74AHCT1G04DCKR as a direct replacement for NC7ST04P5?

A: Yes. Both parts perform single-channel inversion in identical SC-70-5 packages with compatible 4.5V ~ 5.5V supply voltage and input/output logic levels. The SN74AHCT1G04DCKR provides enhanced output drive (8mA vs. 2mA) and faster propagation delay (9ns vs. 26ns), making it functionally superior. No circuit modifications are required.

Q: What is the difference between 74AHCT and 74AHC logic families?

A: The 74AHCT family is CMOS-compatible with TTL input thresholds (0.8V low, 2V high), matching the NC7ST04P5 specifications. The 74AHC family uses CMOS input thresholds (0.5V ~ 1.65V low, 1.5V ~ 3.85V high) and supports wider supply voltage (2V ~ 5.5V). Both families are functionally compatible inverters; selection depends on input signal levels and supply voltage requirements.

Q: Why does M74VHC1GT04DFT1G have a lower minimum supply voltage (3V vs. 4.5V)?

A: The M74VHC1GT04DFT series uses a different process technology (VHC) that operates across a wider voltage range. This provides flexibility for applications with lower supply voltages while maintaining full compatibility at 4.5V ~ 5.5V operation. No design changes are required when substituting into 5V systems.

Q: Are automotive-qualified parts (CAHCT1G04QDCKRG4Q1) necessary for non-automotive applications?

A: No. Automotive-qualified parts carry AEC-Q100 certification for enhanced reliability screening and temperature cycling. For non-automotive applications, standard industrial-grade parts (SN74AHCT1G04DCKR, 74AHCT1G04GW,125) provide equivalent functionality at lower cost.

Q: What is the significance of the "X" suffix in NC7ST04P5X?

A: The "X" suffix indicates a minor revision or manufacturing variant of the base NC7ST04P5 part number. Electrical specifications and package compatibility remain identical. The "X" variant maintains active product status, making it the recommended replacement for the discontinued NC7ST04P5.

Q: Can I substitute 74AHCT1G08GV,125 (AND gate) for the NC7ST04P5 (inverter)?

A: No. The 74AHCT1G08GV,125 is a 2-input AND gate, not an inverter. Logic function is fundamentally different. This part is listed in the NC7ST04P5 substitute field but is not functionally equivalent and cannot replace the inverter in any application.

Q: Do all substitute parts use the same SC-70-5 package?

A: Most substitutes use SC-70-5 or equivalent 5-TSSOP packages. The 74AHCT1G04GW,125 uses standard 5-TSSOP packaging. All packages are mechanically and electrically compatible for PCB assembly. Verify package designation during procurement to ensure compatibility with existing PCB footprints.

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