PI74STX1G32CX Equivalent & Substitute Parts

Part Overview

The PI74STX1G32CX is a single-channel 2-input OR gate logic IC manufactured by Diodes Incorporated in SC-70-5 packaging. This part operates across a supply voltage range of 1.65V to 5.5V with a maximum propagation delay of 4.6ns at 5V with 50pF load. The product is classified as obsolete, making equivalent and substitute parts necessary for ongoing design support and procurement.

Key Parameters

Parameter	Value
Logic Type	OR Gate
Number of Circuits	1
Number of Inputs	2
Voltage Supply Range	1.65V ~ 5.5V
Current Output High/Low	32mA / 32mA
Max Propagation Delay @ 5V, 50pF	4.6ns
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	5-TSSOP, SC-70-5, SOT-353

Substitute Part Grouping Explanation

Substitution for the PI74STX1G32CX is determined by the following critical parameters:

Logic function: Single-channel 2-input OR gate
Supply voltage compatibility: 1.65V ~ 5.5V minimum requirement
Output drive capability: 32mA minimum for both high and low states
Package compatibility: SC-70-5, SOT-353, or 5-TSSOP footprints
Propagation delay: Maximum 4.6ns at 5V with 50pF load
Operating temperature range: Minimum -40°C ~ 85°C

Substitute parts must maintain functional equivalence across these parameters. Parts with extended temperature ranges, improved quiescent current characteristics, or enhanced RoHS compliance are acceptable alternatives provided they meet or exceed the minimum electrical specifications.

Parameter Comparison

Part Number	Manufacturer	Series	Voltage Supply	Quiescent Current (Max)	Output Current (mA)	Propagation Delay @ 5V, 50pF	Operating Temp	Package	Product Status	RoHS Status
PI74STX1G32CX	Diodes Incorporated	74STX	1.65V ~ 5.5V	2 µA	32 / 32	4.6ns	-40°C ~ 85°C	SC-70-5	Obsolete	Non-compliant
74LVC1G32SE-7	Diodes Incorporated	74LVC	1.65V ~ 5.5V	200 µA	32 / 32	1.7ns	-40°C ~ 125°C	SOT-353	Active	ROHS3 Compliant
74LVCE1G32SE-7	Diodes Incorporated	74LVCE	1.4V ~ 5.5V	10 µA	32 / 32	3.6ns	-40°C ~ 85°C	SOT-353	Active	ROHS3 Compliant
74LVC1G32GV,125	Nexperia USA Inc.	74LVC	1.65V ~ 5.5V	4 µA	32 / 32	4ns	-40°C ~ 125°C	SC-74A	Active	ROHS3 Compliant
74LVC1G32GW,125	Nexperia USA Inc.	74LVC	1.65V ~ 5.5V	4 µA	32 / 32	4ns	-40°C ~ 125°C	5-TSSOP	Active	ROHS3 Compliant
NL17SZ32DFT2G	onsemi	17SZ	1.65V ~ 5.5V	1 µA	32 / 32	4.5ns	-55°C ~ 125°C	SC-88A	Active	ROHS3 Compliant
SN74AHC1G32DCKR	Texas Instruments	74AHC	2V ~ 5.5V	1 µA	8 / 8	7.5ns	-40°C ~ 85°C	SC-70-5	Active	ROHS3 Compliant
SN74LVC1G32DBVR	Texas Instruments	74LVC	1.65V ~ 5.5V	10 µA	32 / 32	4ns	-40°C ~ 125°C	SOT-23-5	Active	ROHS3 Compliant
SN74LVC1G32DBVT	Texas Instruments	74LVC	1.65V ~ 5.5V	10 µA	32 / 32	4ns	-40°C ~ 125°C	SOT-23-5	Active	ROHS3 Compliant
SN74LVC1G32DCKR	Texas Instruments	74LVC	1.65V ~ 5.5V	10 µA	32 / 32	4ns	-40°C ~ 125°C	SC-70-5	Active	ROHS3 Compliant
SN74LVC1G32DCKT	Texas Instruments	74LVC	1.65V ~ 5.5V	10 µA	32 / 32	4ns	-40°C ~ 125°C	SC-70-5	Active	ROHS3 Compliant

Engineering Selection Recommendations

All listed substitute parts are active products with ROHS3 compliance, addressing the obsolescence and non-compliance status of the PI74STX1G32CX.

For SC-70-5 package compatibility with identical footprint: SN74LVC1G32DCKR and SN74LVC1G32DCKT from Texas Instruments maintain the original package while offering active product status and RoHS compliance.

For extended operating temperature range (-40°C to 125°C): 74LVC1G32SE-7, 74LVC1G32GV,125, 74LVC1G32GW,125, NL17SZ32DFT2G, SN74LVC1G32DBVR, SN74LVC1G32DBVT, SN74LVC1G32DCKR, and SN74LVC1G32DCKT all support this range.

For lowest quiescent current: NL17SZ32DFT2G (1 µA) and SN74AHC1G32DCKR (1 µA) offer superior power efficiency.

For fastest propagation delay: 74LVC1G32SE-7 (1.7ns) provides the shortest delay specification.

For output current limitations: SN74AHC1G32DCKR provides 8mA output drive, which is reduced compared to the 32mA specification of the original part and other substitutes.

Frequently Asked Questions (FAQ)

Q: Can I use SN74AHC1G32DCKR as a direct replacement for PI74STX1G32CX?

A: SN74AHC1G32DCKR maintains SC-70-5 package compatibility and operates within the required voltage range. However, it provides only 8mA output current versus the required 32mA. Use this part only if your circuit design requires less than 8mA output drive.

Q: What is the difference between SOT-353 and SC-70-5 packages?

A: Both are 5-pin surface mount packages with identical pin counts and similar footprints. SOT-353 and SC-70-5 are functionally equivalent package designations. Verify PCB layout compatibility with your design before substitution.

Q: Why does 74LVCE1G32SE-7 have lower quiescent current than 74LVC1G32SE-7?

A: The 74LVCE series incorporates low-power design techniques. Both parts are functionally equivalent OR gates with identical output drive capability and propagation delay characteristics suitable for the PI74STX1G32CX application.

Q: Is the extended temperature range of NL17SZ32DFT2G (-55°C to 125°C) a concern for standard applications?

A: Extended temperature range does not create compatibility issues. It indicates the part operates reliably across a wider temperature spectrum, making it suitable for applications requiring -40°C to 85°C operation.

Q: Which substitute offers the best overall compatibility with the original PI74STX1G32CX?

A: SN74LVC1G32DCKR and SN74LVC1G32DCKT from Texas Instruments provide identical SC-70-5 packaging, matching electrical specifications (32mA output drive, 1.65V to 5.5V supply), and active product status with RoHS compliance.

Q: Can I interchange parts with different package types in my design?

A: Package types must match your PCB layout. SC-70-5, SOT-353, SOT-23-5, and SC-74A are distinct packages with different pin configurations and footprints. Select substitutes based on your specific package requirement.

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