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PI5C3245LE Equivalent & Substitute Parts
Part Overview
The PI5C3245LE is an 8 x 1:1 bus switch logic IC manufactured by Diodes Incorporated in a 20-TSSOP package. This component is classified as Last Time Buy, indicating limited future availability. Bus switches are essential for multiplexing and signal routing applications where multiple data sources must be selectively connected to a single output path. Equivalent and substitute parts are necessary to ensure design continuity and supply chain flexibility for applications currently using or planning to implement this component.
Substiute Parts
Key Parameters
| Parameter | Value |
|---|---|
| Manufacturer Part Number | PI5C3245LE |
| Manufacturer | Diodes Incorporated |
| Type | Bus Switch |
| Circuit Configuration | 8 x 1:1 |
| Independent Circuits | 1 |
| Voltage Supply Range | 4.75V ~ 5.25V |
| Operating Temperature Range | -40°C ~ 85°C |
| Package Type | 20-TSSOP (0.173", 4.40mm Width) |
| Mounting Type | Surface Mount |
| RoHS Status | ROHS3 Compliant |
| Moisture Sensitivity Level | 1 (Unlimited) |
| Product Status | Last Time Buy |
Substitute Part Grouping Explanation
Substitution eligibility for the PI5C3245LE is determined by the following critical parameters:
- Circuit configuration (8 x 1:1 topology)
- Voltage supply range compatibility (minimum 4.75V operation required)
- Operating temperature range (-40°C ~ 85°C)
- Package form factor and pin count (20-pin surface mount)
- RoHS3 compliance and environmental certifications
Substitute parts are grouped into two categories based on package compatibility:
Group 1: Identical Package (20-TSSOP, 0.173" width) – Direct pin-compatible replacements with no PCB layout modifications required.
Group 2: Alternative Packages (20-SSOP, 20-TVSOP) – Functionally equivalent but requiring PCB footprint adjustment. These maintain the same electrical specifications and pin count but differ in physical dimensions.
Parameter Comparison
| Part Number | Manufacturer | Circuit | Voltage Supply | Operating Temp | Package Type | Package Width | Product Status | MSL |
|---|---|---|---|---|---|---|---|---|
| PI5C3245LE | Diodes Incorporated | 8 x 1:1 | 4.75V ~ 5.25V | -40°C ~ 85°C | 20-TSSOP | 0.173" | Last Time Buy | 1 |
| FST3245MTCX | onsemi | 8 x 1:1 | 4V ~ 5.5V | -40°C ~ 85°C | 20-TSSOP | 0.173" | Obsolete | 1 |
| SN74CBT3245APW | Texas Instruments | 8 x 1:1 | 4V ~ 5.5V | -40°C ~ 85°C | 20-TSSOP | 0.173" | Last Time Buy | 1 |
| SN74CBT3245APWR | Texas Instruments | 8 x 1:1 | 4V ~ 5.5V | -40°C ~ 85°C | 20-TSSOP | 0.173" | Last Time Buy | 1 |
| SN74CBT3245ADBQR | Texas Instruments | 8 x 1:1 | 4V ~ 5.5V | -40°C ~ 85°C | 20-SSOP | 0.154" | Last Time Buy | 2 |
| SN74CBT3245ADBR | Texas Instruments | 8 x 1:1 | 4V ~ 5.5V | -40°C ~ 85°C | 20-SSOP | 0.209" | Last Time Buy | 1 |
| SN74CBT3245ADGVR | Texas Instruments | 8 x 1:1 | 4V ~ 5.5V | -40°C ~ 85°C | 20-TVSOP | 0.173" | Last Time Buy | 1 |
| SN74CBT3245CDBQR | Texas Instruments | 8 x 1:1 | 4V ~ 5.5V | -40°C ~ 85°C | 20-SSOP | 0.154" | Active | 2 |
| SN74CBT3245CDBR | Texas Instruments | 8 x 1:1 | 4V ~ 5.5V | -40°C ~ 85°C | 20-SSOP | 0.209" | Active | 1 |
| SN74CBT3245CDGVR | Texas Instruments | 8 x 1:1 | 4V ~ 5.5V | -40°C ~ 85°C | 20-TVSOP | 0.173" | Active | 1 |
| QS32245QG | IDT, Integrated Device Technology Inc | 1 x 8:1 | 4.75V ~ 5.25V | -40°C ~ 85°C | 20-QSOP | 0.154" | Active | Not specified |
Engineering Selection Recommendations
Direct Pin-Compatible Replacements (No PCB Modification Required):
SN74CBT3245APW and SN74CBT3245APWR from Texas Instruments are the preferred direct substitutes for PI5C3245LE. Both maintain identical 20-TSSOP packaging with 0.173" width and support the full -40°C to 85°C operating range. SN74CBT3245APWR offers extended supply voltage range (4V ~ 5.5V) compared to the PI5C3245LE (4.75V ~ 5.25V), providing additional design margin. Both are RoHS3 compliant with MSL 1 rating.
FST3245MTCX from onsemi is functionally equivalent in the same 20-TSSOP package but carries Obsolete product status, limiting its suitability for new designs despite current inventory availability.
Alternative Package Options (PCB Footprint Modification Required):
SN74CBT3245CDBQR and SN74CBT3245CDBR from Texas Instruments provide Active product status, ensuring long-term availability. Both use 20-SSOP packaging with different width specifications (0.154" and 0.209" respectively). SN74CBT3245CDBR maintains MSL 1 rating identical to the original part. These alternatives require PCB layout changes but offer superior supply chain continuity.
SN74CBT3245CDGVR offers Active status in 20-TVSOP packaging (0.173" width), providing another footprint option while maintaining electrical compatibility.
Not Recommended:
QS32245QG from IDT, despite Active status, implements a different circuit topology (1 x 8:1 versus 8 x 1:1), making it functionally incompatible for direct substitution despite matching voltage and temperature specifications.
Frequently Asked Questions (FAQ)
Q: Can I use SN74CBT3245CDBQR as a direct replacement for PI5C3245LE without modifying my PCB?
A: No. While SN74CBT3245CDBQR is electrically equivalent, it uses 20-SSOP packaging (0.154" width) instead of the 20-TSSOP (0.173" width) of the PI5C3245LE. PCB footprint modification is required. For direct replacement without layout changes, use SN74CBT3245APW or SN74CBT3245APWR.
Q: What is the voltage supply difference between PI5C3245LE and SN74CBT3245APWR?
A: PI5C3245LE operates at 4.75V ~ 5.25V, while SN74CBT3245APWR operates at 4V ~ 5.5V. The Texas Instruments part accepts lower minimum voltage (4V versus 4.75V) and higher maximum voltage (5.5V versus 5.25V), providing broader supply compatibility.
Q: Why is QS32245QG not suitable as a substitute?
A: QS32245QG implements a 1 x 8:1 circuit topology, which is functionally different from the 8 x 1:1 configuration of PI5C3245LE. Circuit topology determines signal routing architecture and cannot be interchanged without redesigning the application logic.
Q: Which substitute offers the best long-term supply availability?
A: SN74CBT3245CDBQR and SN74CBT3245CDBR from Texas Instruments carry Active product status, indicating ongoing production and support. PI5C3245LE and most SN74CBT3245A variants are Last Time Buy, with limited future availability.
Q: Are all substitute parts RoHS3 compliant?
A: All substitute parts listed except QS32245QG explicitly state RoHS3 compliance. QS32245QG does not specify RoHS status in the provided data. Verify compliance requirements for your specific application before selection.
Q: What does MSL 1 versus MSL 2 mean for component handling?
A: MSL (Moisture Sensitivity Level) 1 indicates unlimited shelf life without moisture control. MSL 2 requires moisture control and has a 1-year shelf life limit. PI5C3245LE carries MSL 1. Some substitutes (SN74CBT3245ADBQR, SN74CBT3245CDBQR) carry MSL 2, requiring stricter storage and handling procedures.
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