PI4MSD5V9545CLEX Equivalent & Substitute Parts

Part Overview

The PI4MSD5V9545CLEX is a bus switch IC manufactured by Diodes Incorporated, designed for 2 x 1:4 multiplexing applications in logic circuits. This component operates across a wide supply voltage range of 1.65V to 5.5V and is housed in a 20-TSSOP surface mount package. The device is currently in Active product status with 817 units available in stock.

Substitute parts become necessary due to supply chain constraints, inventory availability, or manufacturing discontinuation. The parts listed below maintain identical electrical and mechanical specifications, enabling direct replacement in applications requiring 2 x 1:4 bus switching functionality.

Key Parameters

Parameter	Specification
Type	Bus Switch
Circuit Configuration	2 x 1:4
Independent Circuits	1
Voltage Supply Range	1.65V ~ 5.5V
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)

Substitute Part Grouping Explanation

Substitution eligibility for the PI4MSD5V9545CLEX is determined by strict equivalence across the following critical parameters:

Circuit Configuration: All substitutes must provide 2 x 1:4 bus switching functionality
Voltage Supply Range: All substitutes must operate within 1.65V ~ 5.5V
Operating Temperature Range: All substitutes must support -40°C ~ 85°C
Package Type: All substitutes must use 20-TSSOP surface mount packaging with identical physical dimensions
Compliance Standards: All substitutes must maintain ROHS3 compliance and MSL 1 rating

The substitute parts identified below meet all these criteria and are therefore electrically and mechanically interchangeable with the main part number.

Parameter Comparison

Parameter	PI4MSD5V9545CLEX	PI4MSD5V9545ALEX	TCA9545APWR
Manufacturer	Diodes Incorporated	Diodes Incorporated	Texas Instruments
Type	Bus Switch	Bus Switch	Bus Switch
Circuit Configuration	2 x 1:4	2 x 1:4	2 x 1:4
Independent Circuits	1	1	1
Voltage Supply Range	1.65V ~ 5.5V	1.65V ~ 5.5V	1.65V ~ 5.5V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package / Case	20-TSSOP (0.173", 4.40mm Width)	20-TSSOP (0.173", 4.40mm Width)	20-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount	Surface Mount	Surface Mount
Product Status	Active	Last Time Buy	Active
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)
REACH Status	REACH Unaffected	REACH Unaffected	REACH Unaffected
Current Inventory	817 Pcs	11561 Pcs	60200 Pcs

Engineering Selection Recommendations

PI4MSD5V9545CLEX remains the primary specification part with Active product status and established supply availability. This part number is suitable for new designs and ongoing production where Diodes Incorporated sourcing is preferred.

PI4MSD5V9545ALEX is a parametric equivalent from Diodes Incorporated with significantly higher inventory (11561 units). However, this part carries Last Time Buy status, indicating limited future availability. Selection of this substitute should account for long-term supply planning.

TCA9545APWR is manufactured by Texas Instruments and maintains Active product status with the highest inventory level (60200 units). This substitute provides the most robust long-term supply assurance and is suitable for applications where cross-manufacturer sourcing is acceptable.

All three parts maintain identical electrical performance, thermal characteristics, and compliance certifications. Selection between them should be based on supply chain strategy, manufacturer preference, and inventory requirements rather than technical performance differences.

Frequently Asked Questions (FAQ)

Q: Can PI4MSD5V9545ALEX be used as a direct replacement for PI4MSD5V9545CLEX?

A: Yes. Both parts are manufactured by Diodes Incorporated and share identical electrical specifications, voltage supply range (1.65V ~ 5.5V), operating temperature range (-40°C ~ 85°C), and 20-TSSOP packaging. The primary difference is packaging format (Tape & Reel vs. standard) and product status (Last Time Buy vs. Active).

Q: Is TCA9545APWR from Texas Instruments compatible with designs specified for PI4MSD5V9545CLEX?

A: Yes. The TCA9545APWR provides identical 2 x 1:4 bus switch functionality, operates within the same voltage and temperature ranges, and uses the same 20-TSSOP package. Cross-manufacturer substitution is electrically and mechanically valid.

Q: What is the significance of "Last Time Buy" status for PI4MSD5V9545ALEX?

A: Last Time Buy status indicates that Diodes Incorporated will discontinue this part number after current inventory is depleted. While the part remains fully functional and compliant, future availability cannot be guaranteed. For long-term production requirements, TCA9545APWR or continued use of PI4MSD5V9545CLEX is recommended.

Q: Are there packaging differences between these substitute parts?

A: PI4MSD5V9545CLEX uses standard packaging, while PI4MSD5V9545ALEX is supplied in Tape & Reel (TR) format. TCA9545APWR is supplied in Cut Tape (CT) & Digi-Reel® format. All three use identical 20-TSSOP component packages suitable for surface mount assembly.

Q: Do all substitute parts meet the same compliance requirements?

A: Yes. All three parts are ROHS3 compliant, carry MSL 1 (Unlimited) moisture sensitivity rating, and are REACH Unaffected. Compliance certifications are identical across all substitute options.

Q: Which substitute should be selected for new product designs?

A: For new designs, either PI4MSD5V9545CLEX (Diodes Incorporated, Active status) or TCA9545APWR (Texas Instruments, Active status) are appropriate. Both offer long-term supply stability. PI4MSD5V9545ALEX should be avoided for new designs due to Last Time Buy status.

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