PI4MSD5V9545BLEX Equivalent & Substitute Parts

Part Overview

The PI4MSD5V9545BLEX is a bus switch IC manufactured by Diodes Incorporated, configured as a 2 x 1:4 multiplexer in a 20-TSSOP surface mount package. This logic component operates across a wide supply voltage range of 1.65V to 5.5V and maintains functionality across industrial temperature ranges from -40°C to 85°C. The part is currently in active production status with 618 units available in inventory.

Substitute parts become necessary when the primary part reaches end-of-life status, experiences supply constraints, or when alternative packaging formats better suit manufacturing requirements. The PI4MSD5V9545BLEX has transitioned to Last Time Buy status for certain variants, making equivalent alternatives essential for long-term design continuity.

Key Parameters

Parameter	Value
Manufacturer Part Number	PI4MSD5V9545BLEX
Manufacturer	Diodes Incorporated
Category	Logic
Type	Bus Switch
Circuit Configuration	2 x 1:4
Package / Case	20-TSSOP (0.173", 4.40mm Width)
Voltage Supply Range	1.65V ~ 5.5V
Operating Temperature	-40°C ~ 85°C
Mounting Type	Surface Mount
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)
Product Status	Active

Substitute Part Grouping Explanation

Substitution eligibility for the PI4MSD5V9545BLEX is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Bus switch topology with 2 x 1:4 circuit configuration
20-TSSOP package format (0.173", 4.40mm width)
Single supply voltage operation across 1.65V to 5.5V range
Operating temperature range of -40°C to 85°C
Surface mount mounting type
ROHS3 compliance and MSL Level 1 rating

Substitute Classification:

Parametric Equivalents share identical electrical specifications, circuit topology, and package format. These parts are direct pin-for-pin replacements with no design modifications required.

Manufacturer Recommended Alternatives are listed based on manufacturer cross-reference data but may differ in package format, interface type, or supply voltage specifications. These require design evaluation before implementation.

Parameter Comparison

Parameter	PI4MSD5V9545BLEX	PI4MSD5V9545ALEX	TCA9545APWR	ADN8102ACPZ	TW3801-TC1-CR
Manufacturer	Diodes Incorporated	Diodes Incorporated	Texas Instruments	Analog Devices Inc.	Renesas Electronics
Category	Logic	Logic	Logic	Interface	Interface
Type	Bus Switch	Bus Switch	Bus Switch	Ethernet Controller Interface	Security Systems Interface
Circuit Configuration	2 x 1:4	2 x 1:4	2 x 1:4	N/A	N/A
Package / Case	20-TSSOP	20-TSSOP	20-TSSOP	64-LFCSP-VQ (9x9)	100-TQFP (12x12)
Voltage Supply Range	1.65V ~ 5.5V	1.65V ~ 5.5V	1.65V ~ 5.5V	1.8V ~ 3.3V	1.8V, 3.3V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	Not specified	Not specified
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Packaging Format	Tube	Tape & Reel (TR)	Cut Tape (CT) & Digi-Reel®	Tray	Tray
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	3 (168 Hours)	3 (168 Hours)
Product Status	Active	Last Time Buy	Active	Active	Active
Inventory Available	618 Pcs	11561 Pcs	60200 Pcs	4740 Pcs	2080 Pcs

Engineering Selection Recommendations

Direct Substitutes (Pin-for-Pin Compatible):

PI4MSD5V9545ALEX and TCA9545APWR are parametric equivalents to the PI4MSD5V9545BLEX. Both parts maintain identical electrical specifications, circuit topology, and package format. Selection between these options should be based on product status and supply availability. The TCA9545APWR from Texas Instruments offers the highest inventory level (60200 units) and active production status, making it the preferred choice for new designs requiring long-term availability. The PI4MSD5V9545ALEX remains available with substantial inventory (11561 units) but carries Last Time Buy status, indicating limited future availability.

Alternative Interfaces (Design Evaluation Required):

ADN8102ACPZ and TW3801-TC1-CR are manufacturer-listed alternatives but operate in different functional categories (Ethernet Controller Interface and Security Systems Interface respectively). These parts do not share the bus switch topology and require complete design re-evaluation. The ADN8102ACPZ operates at reduced voltage ranges (1.8V to 3.3V) and uses a different package format (64-LFCSP-VQ). The TW3801-TC1-CR employs a 100-TQFP package with fixed voltage levels (1.8V, 3.3V) and is designed for security system applications. These alternatives are not suitable for direct substitution in applications requiring the 2 x 1:4 bus switch functionality.

Compliance Considerations:

All listed parts maintain ROHS3 compliance and REACH unaffected status. The PI4MSD5V9545BLEX, PI4MSD5V9545ALEX, and TCA9545APWR share MSL Level 1 ratings, indicating unlimited shelf life under controlled storage conditions. The ADN8102ACPZ and TW3801-TC1-CR carry MSL Level 3 ratings, requiring controlled moisture exposure during storage and handling (168-hour maximum exposure limit).

Frequently Asked Questions (FAQ)

Q: Can the PI4MSD5V9545ALEX be used as a direct replacement for the PI4MSD5V9545BLEX?

A: Yes. Both parts are manufactured by Diodes Incorporated with identical electrical specifications, circuit configuration (2 x 1:4 bus switch), and 20-TSSOP package format. The primary difference is packaging format (Tape & Reel versus Tube) and product status (Last Time Buy versus Active). No design modifications are required for substitution.

Q: Is the TCA9545APWR a pin-for-pin equivalent?

A: Yes. The TCA9545APWR from Texas Instruments is a parametric equivalent with identical circuit topology, package format, voltage supply range (1.65V to 5.5V), and operating temperature specifications (-40°C to 85°C). It functions as a direct replacement with no circuit modifications necessary.

Q: Why are ADN8102ACPZ and TW3801-TC1-CR listed as alternatives if they are not compatible?

A: These parts are included based on manufacturer cross-reference data but serve different functional purposes. The ADN8102ACPZ is an Ethernet controller interface, and the TW3801-TC1-CR is a security systems interface. Neither provides the 2 x 1:4 bus switch functionality required by the original design. These alternatives are not suitable for direct substitution.

Q: What are the packaging format differences between substitute parts?

A: The PI4MSD5V9545BLEX is supplied in Tube format. The PI4MSD5V9545ALEX uses Tape & Reel (TR) packaging. The TCA9545APWR is available in Cut Tape (CT) and Digi-Reel® formats. The ADN8102ACPZ and TW3801-TC1-CR are supplied in Tray format. Packaging format selection depends on manufacturing assembly requirements and volume specifications.

Q: Are there moisture sensitivity differences between the substitute parts?

A: Yes. The PI4MSD5V9545BLEX, PI4MSD5V9545ALEX, and TCA9545APWR all carry MSL Level 1 ratings with unlimited shelf life. The ADN8102ACPZ and TW3801-TC1-CR carry MSL Level 3 ratings, requiring controlled storage with maximum 168-hour moisture exposure limits. This affects handling procedures and storage requirements.

Q: Which substitute part offers the best long-term availability?

A: The TCA9545APWR from Texas Instruments is recommended for new designs requiring extended availability. It maintains active production status with the highest inventory level (60200 units) among all listed substitutes. The PI4MSD5V9545ALEX, while available in substantial quantity (11561 units), carries Last Time Buy status indicating limited future production.

Q: Can the PI4MSD5V9545BLEX be used in applications requiring 1.8V to 3.3V operation?

A: Yes. The PI4MSD5V9545BLEX operates across 1.65V to 5.5V, which encompasses the 1.8V to 3.3V range. However, the ADN8102ACPZ is limited to 1.8V to 3.3V operation and cannot operate at the full 1.65V to 5.5V range of the original part. Voltage range compatibility must be verified for each application.

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