PI74STX1G08TEX Equivalent & Substitute Parts

Part Overview

The PI74STX1G08TEX is a single-channel 2-input AND gate logic IC manufactured by Diodes Incorporated in SOT-23-5 surface mount packaging. This part is classified as obsolete, making equivalent substitute parts necessary for new designs and ongoing production requirements. The 74STX1G08 series provides basic AND gate functionality suitable for digital logic applications requiring low-power operation across a 1.65V to 5.5V supply voltage range.

Key Parameters

Parameter	Value
Logic Type	AND Gate
Number of Circuits	1
Number of Inputs	2
Voltage Supply Range	1.65V ~ 5.5V
Current - Quiescent (Max)	2 µA
Current - Output High/Low	32mA / 32mA
Max Propagation Delay @ 5V, 50pF	3.3ns
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
Package / Case	SOT-23-5 (SC-74A)
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution eligibility for the PI74STX1G08TEX is determined by the following critical parameters:

Logic Function: AND gate with 1 channel and 2 inputs (non-negotiable)
Supply Voltage Compatibility: Minimum 1.65V to 5.5V range required
Output Drive Capability: 32mA minimum for both high and low states
Package Compatibility: SOT-23-5, SC-74A, SOT-753, 5-TSSOP, or SC-70-5 surface mount packages
Propagation Delay: Maximum 4.5ns @ 5V, 50pF acceptable for timing-critical applications
Operating Temperature Range: Minimum -40°C to 85°C required
Compliance: ROHS3 compliant, MSL 1 rating

Substitute parts are grouped by package type and active product status. Parts with extended temperature ranges (-40°C to 125°C) and lower quiescent current provide enhanced performance characteristics while maintaining functional equivalence.

Parameter Comparison

Part Number	Manufacturer	Series	Status	Package	Voltage Supply	Quiescent Current (Max)	Propagation Delay @ 5V, 50pF	Temp Range
PI74STX1G08TEX	Diodes Incorporated	74STX	Obsolete	SOT-23-5	1.65V ~ 5.5V	2 µA	3.3ns	-40°C ~ 85°C
74LVC1G08W5-7	Diodes Incorporated	74LVC	Active	SOT-25	1.65V ~ 5.5V	200 µA	1.7ns	-40°C ~ 125°C
74LVCE1G08W5-7	Diodes Incorporated	74LVCE	Active	SOT-25	1.4V ~ 5.5V	10 µA	3.6ns	-40°C ~ 85°C
74LVC1G08GV,125	Nexperia USA Inc.	74LVC	Active	SC-74A	1.65V ~ 5.5V	4 µA	4ns	-40°C ~ 125°C
74LVC1G08GW,125	Nexperia USA Inc.	74LVC	Active	5-TSSOP	1.65V ~ 5.5V	4 µA	4ns	-40°C ~ 125°C
NC7SZ08M5X	onsemi	7SZ	Active	SOT-23-5	1.65V ~ 5.5V	2 µA	4.5ns	-40°C ~ 85°C
SN74LVC1G08DBVR	UMW	74LVC	Active	SOT-23-5	1.65V ~ 5.5V	10 µA	10ns	-40°C ~ 105°C
SN74LVC1G08DBVRE4	Texas Instruments	74LVC	Discontinued at DiGi Electronics	SOT-23-5	1.65V ~ 5.5V	10 µA	4ns	-40°C ~ 125°C
SN74LVC1G08DBVT	Texas Instruments	74LVC	Active	SOT-23-5	1.65V ~ 5.5V	10 µA	4ns	-40°C ~ 125°C
SN74LVC1G08DCKR	UMW	74LVC	Active	SC-70-5	1.65V ~ 5.5V	10 µA	10ns	-40°C ~ 105°C
SN74LVC1G08DCKRG4	Texas Instruments	74LVC	Discontinued at DiGi Electronics	SC-70-5	1.65V ~ 5.5V	10 µA	4ns	-40°C ~ 125°C

Engineering Selection Recommendations

Primary Substitutes (Active Status, Highest Compatibility)

For direct replacement in SOT-23-5 packaging, NC7SZ08M5X from onsemi provides identical quiescent current (2 µA) and package form factor with active product status. SN74LVC1G08DBVT from Texas Instruments offers extended temperature range (-40°C to 125°C) in the same package with active availability.

For applications requiring SC-74A or 5-TSSOP packages, the 74LVC1G08GV,125 and 74LVC1G08GW,125 from Nexperia are actively manufactured with extended temperature operation and low quiescent current (4 µA).

Secondary Substitutes (Active Status, Extended Temperature Range)

The 74LVC1G08W5-7 from Diodes Incorporated in SOT-25 package offers the fastest propagation delay (1.7ns) and extended temperature range, suitable for performance-critical applications where package transition from SOT-23-5 to SOT-25 is acceptable.

Compliance Considerations

All listed substitutes maintain ROHS3 compliance and MSL 1 moisture sensitivity rating, matching the original part specifications. All parts are rated for the required 1.65V to 5.5V supply voltage range and provide 32mA output drive capability.

Frequently Asked Questions (FAQ)

Q: Can I use a substitute part with a different package type?

A: Yes, provided the substitute maintains the same pin configuration and electrical characteristics. SOT-23-5, SC-74A, SOT-753, 5-TSSOP, and SC-70-5 packages are mechanically and electrically compatible for this AND gate function. Verify PCB layout compatibility before substitution.

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

A: All three series implement the same AND gate logic function with identical input/output pin configurations. The 74LVC and 74LVCE series are actively manufactured alternatives to the obsolete 74STX series. The 74LVCE variant offers lower quiescent current (10 µA) and extended voltage range (1.4V minimum) compared to standard 74LVC parts.

Q: Are there propagation delay differences I should consider?

A: The original PI74STX1G08TEX specifies 3.3ns propagation delay at 5V with 50pF load. Substitute parts range from 1.7ns to 10ns under the same conditions. For timing-critical applications, verify that the selected substitute's propagation delay meets system requirements. The 74LVC1G08W5-7 provides the fastest response at 1.7ns.

Q: Which substitute offers the best power efficiency?

A: The NC7SZ08M5X and PI74STX1G08TEX both specify 2 µA quiescent current, providing the lowest standby power consumption. The 74LVCE1G08W5-7 offers a middle ground at 10 µA with extended voltage range capability down to 1.4V.

Q: Can I use parts marked as discontinued?

A: Parts marked "Discontinued at DiGi Electronics" (SN74LVC1G08DBVRE4 and SN74LVC1G08DCKRG4) may have limited availability through alternative distributors. For new designs, prioritize parts with active status to ensure long-term supply chain reliability.

Q: What is the temperature range requirement for my application?

A: The original part operates -40°C to 85°C. If your application requires extended temperature operation, select substitutes with -40°C to 125°C range such as SN74LVC1G08DBVT, 74LVC1G08W5-7, or Nexperia variants (74LVC1G08GV,125 and 74LVC1G08GW,125).

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