PI74STX1G08CEX Equivalent & Substitute Parts

Part Overview

The PI74STX1G08CEX is a single-channel AND gate logic IC manufactured by Diodes Incorporated in the 74STX series. This component features 2 inputs, operates across a supply voltage range of 1.65V to 5.5V, and is packaged in SC-70-5 (5-TSSOP) surface mount configuration. The part is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements.

Key Parameters

Parameter	Value
Logic Type	AND Gate
Number of Circuits	1
Number of Inputs	2
Voltage - Supply	1.65V ~ 5.5V
Current - Output High, Low	32mA, 32mA
Max Propagation Delay @ 5V, 50pF	3.3ns
Operating Temperature	-40°C ~ 85°C
Package / Case	5-TSSOP, SC-70-5, SOT-353
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution for the PI74STX1G08CEX is determined by the following critical parameters:

Logic Function: Single-channel AND gate with 2 inputs (non-negotiable)
Supply Voltage Range: Minimum 1.65V to 5.5V compatibility required
Output Drive Capability: 32mA high and low output current
Package Compatibility: SC-70-5, 5-TSSOP, or SOT-353 surface mount packages
Propagation Delay: Maximum 3.3ns at 5V with 50pF load (performance baseline)
Operating Temperature: -40°C to 85°C minimum range
Compliance: ROHS3 compliant, MSL 1 rating

Substitute parts are grouped into two categories: direct package equivalents (SC-70-5/SOT-353 variants) and alternative package options (SOT-23-5, SC-74A) that maintain electrical compatibility while offering different form factors.

Parameter Comparison

Part Number	Manufacturer	Series	Logic Type	Supply Voltage	Output Current (mA)	Propagation Delay (ns)	Temp Range (°C)	Package	Status
PI74STX1G08CEX	Diodes Inc.	74STX	AND Gate 1CH 2-INP	1.65 ~ 5.5V	32, 32	3.3 @ 5V	-40 ~ 85	SC-70-5	Obsolete
74LVC1G08SE-7	Diodes Inc.	74LVC	AND Gate 1CH 2-INP	1.65 ~ 5.5V	32, 32	1.7 @ 5V	-40 ~ 125	SOT-353	Active
74LVCE1G08SE-7	Diodes Inc.	74LVCE	AND Gate 1CH 2-INP	1.4 ~ 5.5V	32, 32	3.6 @ 5V	-40 ~ 85	SOT-353	Active
74LVC1G08GV,125	Nexperia USA	74LVC	AND Gate 1CH 2-INP	1.65 ~ 5.5V	32, 32	4 @ 5V	-40 ~ 125	SC-74A	Active
74LVC1G08GW,125	Nexperia USA	74LVC	AND Gate 1CH 2-INP	1.65 ~ 5.5V	32, 32	4 @ 5V	-40 ~ 125	5-TSSOP	Active
NC7SZ08M5X	onsemi	7SZ	AND Gate 1CH 2-INP	1.65 ~ 5.5V	32, 32	4.5 @ 5V	-40 ~ 85	SOT-23-5	Active
NC7SZ08P5X	onsemi	7SZ	AND Gate 1CH 2-INP	1.65 ~ 5.5V	32, 32	4.5 @ 5V	-40 ~ 85	SC-70-5	Active
NL17SZ08DFT2G	onsemi	17SZ	AND Gate 1CH 2-INP	1.65 ~ 5.5V	32, 32	4.5 @ 5V	-55 ~ 125	SC-88A	Active
NLV17SZ08DFT2G	onsemi	17SZ	AND Gate 1CH 2-INP	1.65 ~ 5.5V	32, 32	4.5 @ 5V	-55 ~ 125	SC-88A	Obsolete
SN74LVC1G08DBVR	UMW	74LVC	AND Gate 1CH 2-INP	1.65 ~ 5.5V	32, 32	10 @ 5V	-40 ~ 105	SOT-23-5	Active
SN74LVC1G08DBVRE4	Texas Instruments	74LVC	AND Gate 1CH 2-INP	1.65 ~ 5.5V	32, 32	4 @ 5V	-40 ~ 125	SOT-23-5	Discontinued

Engineering Selection Recommendations

Primary Substitutes (Active Status, Direct Package Match)

For applications requiring direct SC-70-5 package compatibility, NC7SZ08P5X from onsemi provides an active, in-production alternative with identical package footprint and electrical specifications. This part maintains the same supply voltage range, output drive capability, and operating temperature floor of -40°C.

Secondary Substitutes (Active Status, Compatible Packages)

The 74LVC1G08SE-7 (Diodes Incorporated, SOT-353 package) and 74LVC1G08GW,125 (Nexperia, 5-TSSOP package) are active alternatives offering extended operating temperature ranges to 125°C and improved propagation delay performance. Both maintain ROHS3 compliance and MSL 1 rating. These parts are suitable for designs where package footprint can be adapted.

Extended Temperature Range Option

The NL17SZ08DFT2G (onsemi, SC-88A package) extends the operating temperature range to -55°C to 125°C, providing broader environmental coverage for industrial and automotive applications while maintaining active production status.

Avoid

NLV17SZ08DFT2G is classified as obsolete and should not be selected for new designs despite automotive qualification. SN74LVC1G08DBVRE4 is discontinued at DiGi Electronics and presents supply chain risk.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a different package than the original SC-70-5?

A: Yes, provided the alternative package (SOT-353, 5-TSSOP, SOT-23-5, SC-74A) is compatible with your PCB layout and assembly process. All listed substitutes maintain identical electrical function and pin configuration. Verify footprint compatibility with your design before implementation.

Q: What is the difference between 74LVC and 74LVCE series parts?

A: Both are single-channel AND gates with identical logic function and output drive. The 74LVCE series (74LVCE1G08SE-7) operates at lower quiescent current (10 µA vs. 200 µA) and supports a lower minimum supply voltage (1.4V vs. 1.65V). Select 74LVCE for power-constrained applications.

Q: Why does the original PI74STX1G08CEX show 3.3ns propagation delay while most substitutes are 4ns or higher?

A: Propagation delay specifications vary by test conditions and load capacitance. The PI74STX1G08CEX specification of 3.3ns at 5V with 50pF load represents the original design performance. Substitute parts meeting or exceeding this specification are functionally compatible. For timing-critical applications, verify propagation delay against your specific load conditions.

Q: Is the NL17SZ08DFT2G suitable for automotive applications?

A: The NL17SZ08DFT2G is an active part with extended temperature range (-55°C to 125°C) but does not carry automotive qualification markings in the provided data. The NLV17SZ08DFT2G variant includes AEC-Q100 qualification but is obsolete. Consult the manufacturer for current automotive-qualified alternatives.

Q: What does MSL 1 (Unlimited) mean for moisture sensitivity?

A: MSL 1 indicates the component has unlimited shelf life and requires no special moisture control during storage or handling. This applies to all listed substitutes, simplifying inventory management and reducing production risk.

Q: Can I substitute based on propagation delay alone?

A: No. Substitution requires matching all critical parameters: logic function, supply voltage range, output drive capability, package type, and operating temperature range. Propagation delay is one performance metric but does not determine compatibility on its own.

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