PI74ST1G08TEX AND Gate IC Equivalent & Substitute Parts

Part Overview

The PI74ST1G08TEX is a single-channel 2-input AND gate logic IC manufactured by Diodes Incorporated in SOT-23-5 surface mount packaging. This part operates across a 1.8V to 3.6V supply voltage range with a maximum propagation delay of 3.8ns at 3.3V with 50pF load. The product is classified as obsolete, making equivalent and substitute parts necessary for new designs and ongoing production requirements.

Substiute Parts

PI74ST1G08TEX

Diodes IncorporatedIn Stock: 62233PI74ST1G08TEX Datasheet

Current PartRFQ

SN74AUC1G08DBVR

Texas InstrumentsIn Stock: 24222SN74AUC1G08DBVR Datasheet

MFR RecommendedRFQ

SN74AUC1G08DCKR

Texas InstrumentsIn Stock: 4398SN74AUC1G08DCKR Datasheet

MFR RecommendedRFQ

SN74LVC1G08DCKR

UMWIn Stock: 394237SN74LVC1G08DCKR Datasheet

MFR RecommendedRFQ

SN74LVC1G08DCKT

Texas InstrumentsIn Stock: 36385SN74LVC1G08DCKT Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PI74ST1G08TEX is determined by the following critical parameters:

Functional Requirements: Single-channel 2-input AND gate logic function with identical circuit topology.

Electrical Compatibility: Supply voltage range must encompass or overlap with the original 1.8V to 3.6V specification. Output drive capability (current sourcing and sinking) must meet or exceed 24mA per the original specification.

Packaging Compatibility: Surface mount packages SC-74A (SOT-753) or SC-70-5 (5-TSSOP) are acceptable, as both are standard 5-pin configurations compatible with SOT-23-5 footprints in most applications.

Performance Characteristics: Propagation delay and operating temperature range are secondary selection criteria; substitute parts with faster propagation delays and wider temperature ranges are acceptable.

Compliance Requirements: All substitute parts must maintain ROHS3 compliance and EAR99 export classification.

Parameter Comparison

Engineering Selection Recommendations

SN74AUC1G08DBVR (Texas Instruments, Active): This part is the primary recommended substitute when the application operates within the 0.8V to 2.7V supply range. It offers faster propagation delay (2ns) and lower quiescent current (10 µA) compared to the original PI74ST1G08TEX. The SOT-23-5 package provides direct footprint compatibility. However, output drive capability is reduced to 9mA per channel, which may limit applications requiring higher current sourcing.

SN74AUC1G08DCKR (Texas Instruments, Active): This variant provides identical electrical performance to the SN74AUC1G08DBVR but uses SC-70-5 packaging. Selection depends on PCB layout requirements and available footprint space. The SC-70-5 package is smaller than SOT-23-5, making it suitable for space-constrained designs.

SN74LVC1G08DCKR (UMW, Active): This part extends the supply voltage range to 1.65V to 5.5V, providing broader compatibility with mixed-voltage systems. Output drive capability increases to 32mA, exceeding the original specification. The wider operating temperature range (-40°C to 105°C) supports extended environmental conditions. SC-70-5 packaging is used.

SN74LVC1G08DCKT (Texas Instruments, Active): This part offers the widest operating temperature range (-40°C to 125°C) and highest output drive capability (32mA). Supply voltage range extends to 5.5V. Propagation delay of 4ns at 5V with 50pF load closely matches the original specification. SC-70-5 packaging is used. This part is suitable for industrial and automotive applications requiring extended temperature operation.

Frequently Asked Questions (FAQ)

Q: Can the SN74AUC1G08 series directly replace the PI74ST1G08TEX?

A: The SN74AUC1G08 series provides functional equivalence as single-channel 2-input AND gates. However, the supply voltage range is limited to 0.8V to 2.7V, which does not fully overlap with the original 1.8V to 3.6V specification. Output drive capability is reduced to 9mA. Verify that your application operates within the 0.8V to 2.7V range before selecting this substitute.

Q: What is the difference between SOT-23-5 and SC-70-5 packaging?

A: Both are 5-pin surface mount packages with identical pin configurations and electrical compatibility. SOT-23-5 (also designated SC-74A or SOT-753) has larger lead spacing and is easier to hand-solder. SC-70-5 (also designated 5-TSSOP or SOT-353) has smaller lead spacing and occupies less PCB area. Footprint compatibility depends on your PCB design; verify that your assembly process supports the selected package.

Q: Which substitute part should I select for a 5V application?

A: The SN74LVC1G08DCKR or SN74LVC1G08DCKT are the only substitutes rated for 5V operation (1.65V to 5.5V supply range). The SN74AUC1G08 series is limited to 2.7V maximum and is not suitable for 5V applications. The SN74LVC1G08DCKT offers the widest temperature range (-40°C to 125°C) and is recommended for industrial applications.

Q: Is the reduced output drive current of the SN74AUC1G08 (9mA) acceptable?

A: Output drive capability depends on your load requirements. The original PI74ST1G08TEX provides 24mA per channel. The SN74AUC1G08 series provides only 9mA. If your design requires driving multiple logic inputs or has significant capacitive loading, the reduced drive current may cause timing violations or logic errors. The SN74LVC1G08 series provides 32mA, which exceeds the original specification and is suitable for high-drive applications.

Q: Are all substitute parts ROHS3 compliant?

A: Yes. All substitute parts listed (SN74AUC1G08DBVR, SN74AUC1G08DCKR, SN74LVC1G08DCKR, and SN74LVC1G08DCKT) are ROHS3 compliant and maintain EAR99 export classification, matching the original PI74ST1G08TEX compliance status.

Q: What is the inventory status of these substitute parts?

A: SN74LVC1G08DCKR has the highest inventory availability (394,188 pcs). SN74LVC1G08DCKT has 36,300 pcs available. SN74AUC1G08DBVR has 24,200 pcs available. SN74AUC1G08DCKR has the lowest availability (4,340 pcs). Verify current stock levels with your supplier before finalizing procurement decisions.