PI74STX1GU04TEX Equivalent & Substitute Parts

Part Overview

The PI74STX1GU04TEX is a single-channel inverter logic IC manufactured by Diodes Incorporated in SOT-23-5 surface mount packaging. This part operates across a supply voltage range of 1.65V to 5.5V with a maximum quiescent current of 2 µA and propagation delay of 3.4ns at 5V with 50pF load. The product is classified as obsolete, making equivalent substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Logic Type	Inverter
Number of Circuits	1
Number of Inputs	1
Voltage - Supply	1.65V ~ 5.5V
Current - Quiescent (Max)	2 µA
Current - Output High, Low	16mA, 16mA
Max Propagation Delay @ 5V, 50pF	3.4ns
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	SC-74A, SOT-753
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the PI74STX1GU04TEX is determined by the following criteria:

Functional Equivalence: All substitute parts must be single-channel inverter logic ICs with identical circuit count (1) and input count (1).

Electrical Compatibility: Supply voltage range must encompass or match 1.65V ~ 5.5V. Output current capability must meet or exceed 16mA for both high and low states. Propagation delay must not exceed the original specification of 3.4ns at 5V with 50pF load.

Package Compatibility: Substitute parts must use surface mount packaging compatible with SOT-23-5 or equivalent footprints (SC-74A, SOT-753, SOT-353, SC-70-5, 5-TSSOP).

Compliance Requirements: All substitutes must maintain ROHS3 compliance and MSL rating of 1 (Unlimited).

Product Status Consideration: Active product status is preferred for long-term availability, though discontinued parts may serve as interim solutions.

Parameter Comparison

Part Number	Manufacturer	Series	Package	Voltage Supply	Quiescent Current (Max)	Output Current (H/L)	Propagation Delay @ 5V, 50pF	Operating Temp	Product Status
PI74STX1GU04TEX	Diodes Inc.	74STX	SOT-23-5	1.65V ~ 5.5V	2 µA	16mA, 16mA	3.4ns	-40°C ~ 85°C	Obsolete
74LVC1G04SE-7	Diodes Inc.	74LVC	SOT-353	1.65V ~ 5.5V	10 µA	32mA, 32mA	5ns	-40°C ~ 125°C	Active
74LVC1G04W5-7	Diodes Inc.	74LVC	SOT-25	1.65V ~ 5.5V	10 µA	32mA, 32mA	5ns	-40°C ~ 125°C	Active
74LVC1GU04DCKRG4	Texas Instruments	74LVC	SC-70-5	1.65V ~ 5.5V	10 µA	32mA, 32mA	4.6ns	-40°C ~ 125°C	Discontinued
74LVC1GU04DCKTG4	Texas Instruments	74LVC	SC-70-5	1.65V ~ 5.5V	10 µA	32mA, 32mA	4.6ns	-40°C ~ 125°C	Discontinued
74LVC1GU04GV-Q100H	Nexperia USA Inc.	74LVC	SC-74A	1.65V ~ 5.5V	4 µA	32mA, 32mA	4ns	-40°C ~ 125°C	Active
NC7SZU04M5X	onsemi	7SZU	SOT-23-5	1.65V ~ 5.5V	2 µA	16mA, 16mA	5ns	-40°C ~ 85°C	Obsolete
NC7SZU04P5X	onsemi	7SZU	SC-70-5	1.65V ~ 5.5V	2 µA	16mA, 16mA	5ns	-40°C ~ 85°C	Active
SN74LVC1GU04DBVR	Texas Instruments	74LVC	SOT-23-5	1.65V ~ 5.5V	10 µA	32mA, 32mA	4.6ns	-40°C ~ 125°C	Active
SN74LVC1GU04DBVT	Texas Instruments	74LVC	SOT-23-5	1.65V ~ 5.5V	10 µA	32mA, 32mA	4.6ns	-40°C ~ 125°C	Active
SN74LVC1GU04DCKR	Texas Instruments	74LVC	SC-70-5	1.65V ~ 5.5V	10 µA	32mA, 32mA	4.6ns	-40°C ~ 125°C	Active

Engineering Selection Recommendations

Primary Substitutes (Active Status, Preferred)

SN74LVC1GU04DBVR and SN74LVC1GU04DBVT from Texas Instruments are direct functional replacements in SOT-23-5 packaging. Both maintain the original footprint, supply voltage range, and ROHS3 compliance. Operating temperature extends to 125°C, providing broader environmental coverage than the original part.

74LVC1GU04GV-Q100H from Nexperia USA Inc. offers automotive-grade qualification (AEC-Q100) in SC-74A packaging with reduced quiescent current (4 µA) and improved propagation delay (4ns). This part is suitable for applications requiring automotive-level reliability.

Secondary Substitutes (Active Status, Alternative Packages)

NC7SZU04P5X from onsemi in SC-70-5 packaging matches the original electrical characteristics (2 µA quiescent current, 16mA output current, 5V operating range) with active product status and high inventory availability (105,300 pcs). Package footprint differs from the original SOT-23-5.

74LVC1G04SE-7 and 74LVC1G04W5-7 from Diodes Incorporated provide active alternatives with enhanced output current capability (32mA) and extended operating temperature range (-40°C to 125°C). These parts require PCB layout adjustment due to different package types (SOT-353 and SOT-25 respectively).

Interim Solutions (Discontinued Status)

74LVC1GU04DCKRG4 and 74LVC1GU04DCKTG4 from Texas Instruments remain available in inventory (1,274 and 6,078 pcs respectively) despite discontinued status. These SC-70-5 packages offer propagation delay of 4.6ns, matching the original specification closely.

Frequently Asked Questions (FAQ)

Q: Can I directly replace PI74STX1GU04TEX with SN74LVC1GU04DBVR without PCB modifications?

A: Yes. Both parts use SOT-23-5 packaging (SC-74A, SOT-753) with identical pin configurations. Electrical parameters are compatible across the specified supply voltage range (1.65V ~ 5.5V). No PCB layout changes are required.

Q: What is the difference between 74LVC1GU04DBVR and 74LVC1GU04DBVT?

A: Both parts are electrically identical with identical electrical specifications. The difference is packaging format: DBVR is supplied in Cut Tape (CT) & Digi-Reel format, while DBVT is supplied in Tape & Reel (TR) format. Select based on procurement and assembly requirements.

Q: Why does NC7SZU04P5X have higher propagation delay (5ns) than the original (3.4ns)?

A: NC7SZU04P5X operates within the same supply voltage and temperature ranges as the original but exhibits slightly higher propagation delay. This remains within acceptable limits for most logic applications. Verify timing-critical paths in your specific design.

Q: Is 74LVC1GU04GV-Q100H suitable for automotive applications?

A: Yes. This part carries AEC-Q100 automotive qualification and is graded for automotive use. It is appropriate for automotive-grade designs requiring single-channel inverter functionality.

Q: What inventory considerations should I evaluate?

A: NC7SZU04P5X offers the highest inventory (105,300 pcs), providing long-term supply security. SN74LVC1GU04DBVR and SN74LVC1GU04DBVT maintain active status with 9,400 and 2,974 pcs respectively. Discontinued parts (74LVC1GU04DCKRG4, 74LVC1GU04DCKTG4) have limited remaining stock.

Q: Do all substitute parts maintain ROHS3 compliance?

A: Yes. All listed substitute parts are ROHS3 compliant with MSL rating of 1 (Unlimited), matching the original part's environmental compliance profile.

Q: Can I use parts with different package types interchangeably?

A: No. Parts with different package types (SOT-23-5, SOT-353, SC-70-5, SOT-25) require different PCB footprints and cannot be used interchangeably without layout redesign. Select substitutes matching your original package type when possible.

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