PI5A100Q Equivalent & Substitute Parts

Part Overview

The PI5A100Q is a 4-circuit SPDT analog switch manufactured by Diodes Incorporated, designed for general-purpose signal routing and multiplexing applications. This component features 10Ohm on-state resistance, 2:1 multiplexer/demultiplexer configuration, and operates across a 2V to 6V single supply range. The part is currently classified as obsolete, making identification of functionally equivalent alternatives essential for ongoing design support and production continuity.

Substiute Parts

PI5A100Q

Diodes IncorporatedIn Stock: 2101PI5A100Q Datasheet

Current PartRFQ

PI5A100QE

Diodes IncorporatedIn Stock: 1464PI5A100QE Datasheet

DirectRFQ

TS3A5018DBQR

Texas InstrumentsIn Stock: 17447TS3A5018DBQR Datasheet

MFR RecommendedRFQ

TS3A5018PW

Texas InstrumentsIn Stock: 1250TS3A5018PW Datasheet

MFR RecommendedRFQ

TS3A5018PWR

Texas InstrumentsIn Stock: 109503TS3A5018PWR Datasheet

MFR RecommendedRFQ

TS3L100DBQR

Texas InstrumentsIn Stock: 3939TS3L100DBQR Datasheet

MFR RecommendedRFQ

TS5L100DBQR

Texas InstrumentsIn Stock: 1741TS5L100DBQR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the PI5A100Q is determined by the following core parameters:

Primary Substitution Criteria:

• Switch circuit configuration: SPDT
• Number of circuits: 4
• Multiplexer/demultiplexer circuit: 2:1
• On-state resistance: 10Ohm maximum
• Operating temperature range: -40°C ~ 85°C minimum
• Package compatibility: 16-pin surface mount (SSOP or TSSOP variants acceptable)

Secondary Compatibility Factors:

• Supply voltage range must encompass or be compatible with 2V ~ 6V
• Bandwidth performance: 230MHz minimum
• Leakage current specifications
• Charge injection and crosstalk performance

Substitute parts are grouped into two categories based on electrical performance alignment and product status:

Category 1: Direct Functional Equivalents (Active Status) Parts meeting all primary criteria with active product status and modern compliance certifications.

Category 2: Performance-Enhanced Alternatives (Active/Last Time Buy Status) Parts exceeding primary specifications with improved electrical characteristics but requiring design verification for supply voltage compatibility.

Parameter Comparison

Engineering Selection Recommendations

Tier 1: Direct Replacement (Recommended for Obsolescence Mitigation)

PI5A100QE is the primary substitute for PI5A100Q. Both parts are manufactured by Diodes Incorporated and maintain identical electrical specifications across all critical parameters: 10Ohm on-state resistance, 800mOhm channel matching, 2V ~ 6V supply range, and 230MHz bandwidth. The key distinction is product status: PI5A100QE is active with ROHS3 compliance, whereas PI5A100Q is obsolete and RoHS non-compliant. Packaging is identical (16-QSOP). This substitution requires no design modification.

Tier 2: Performance-Enhanced Alternatives (Supply Voltage Verification Required)

TS3A5018DBQR, TS3A5018PW, and TS3A5018PWR are Texas Instruments equivalents offering superior electrical performance: 300mOhm channel matching (versus 800mOhm), 100nA leakage (versus 10µA), and 2pC charge injection (versus 10pC). All three maintain 10Ohm on-state resistance and 4-circuit SPDT configuration. Critical limitation: supply voltage range is 1.65V ~ 3.6V, which does not encompass the full 2V ~ 6V range of PI5A100Q. These parts are suitable only for designs operating within 1.65V ~ 3.6V. TS3A5018DBQR and TS3A5018PWR are active status; TS3A5018PW is Last Time Buy. Package variants differ: DBQR and PWR use 16-SSOP; PW uses 16-TSSOP.

Tier 3: Specialized Networking Applications (Limited Compatibility)

TS3L100DBQR and TS5L100DBQR are Ethernet-optimized switches with 350MHz bandwidth and 10/100 Base-T features. TS3L100DBQR operates at 3V ~ 3.6V; TS5L100DBQR at 6V ~ 6.5V. On-state resistance is higher (15Ohm and 19Ohm respectively), and operating temperature is restricted to 0°C ~ 70°C. These parts are not direct substitutes for general-purpose applications but may serve specialized networking implementations where supply voltage and temperature ranges align.

Compliance Consideration:

All substitute parts except PI5A100Q carry ROHS3 compliance certification. For applications requiring RoHS compliance, PI5A100QE is the mandatory selection.

Frequently Asked Questions (FAQ)

Q: Can TS3A5018DBQR replace PI5A100Q in all applications?

A: TS3A5018DBQR is electrically compatible for the core switching function (4-circuit SPDT, 10Ohm resistance, 2:1 multiplexing). However, the supply voltage range differs critically: TS3A5018DBQR operates 1.65V ~ 3.6V versus PI5A100Q's 2V ~ 6V. If your design uses supply voltages above 3.6V or below 1.65V, this part is not suitable. Verify your actual supply voltage range before selection.

Q: What is the difference between TS3A5018DBQR, TS3A5018PW, and TS3A5018PWR?

A: All three are Texas Instruments TS3A5018 base parts with identical electrical specifications. Differences are packaging and product status: DBQR uses 16-SSOP in Cut Tape/Digi-Reel format (Active); PW uses 16-TSSOP in Tube format (Last Time Buy); PWR uses 16-TSSOP in Cut Tape/Digi-Reel format (Active). Select based on your PCB layout requirements (SSOP versus TSSOP footprint) and supply chain availability.

Q: Why does PI5A100QE have the same specifications as PI5A100Q but different product status?

A: PI5A100QE is the active production variant of the PI5A100Q design. Diodes Incorporated transitioned from PI5A100Q (obsolete) to PI5A100QE (active) as part of normal product lifecycle management. Electrical performance is identical; the primary advantage of PI5A100QE is ongoing availability and ROHS3 compliance certification.

Q: Are TS3L100DBQR and TS5L100DBQR suitable for general-purpose switching?

A: TS3L100DBQR and TS5L100DBQR are specialized for Ethernet applications with 10/100 Base-T features. While they maintain the 4-circuit SPDT configuration, higher on-state resistance (15Ohm and 19Ohm) and restricted operating temperature (0°C ~ 70°C) make them unsuitable for general-purpose signal routing requiring the full -40°C ~ 85°C range. Use these parts only for Ethernet switching applications where supply voltage and temperature specifications align.

Q: What does "Last Time Buy" status mean for TS3A5018PW and TS5L100DBQR?

A: Last Time Buy indicates the manufacturer has announced end-of-life for these parts. Existing inventory is available for purchase, but no new production will occur after the Last Time Buy date. For new designs, select Active status parts (TS3A5018PWR instead of TS3A5018PW; TS3L100DBQR instead of TS5L100DBQR) to ensure long-term supply continuity.

Q: What is the significance of MSL (Moisture Sensitivity Level) differences?

A: MSL 1 (Unlimited) parts like PI5A100Q and TS3A5018PWR have no moisture-related storage restrictions. MSL 2 (1 Year) parts like TS3A5018DBQR must be used within one year of the manufacturing date if exposed to moisture. For high-volume production with extended component storage, MSL 1 parts reduce handling complexity and risk of moisture-induced failures.