PI5C3244LE Equivalent & Substitute Parts

Part Overview

The PI5C3244LE is a 4 x 1:1 bus switch logic IC manufactured by Diodes Incorporated in a 20-TSSOP package. This component functions as a high-speed multiplexer for digital signal routing in logic applications. The part is currently obsolete, making equivalent substitutes necessary for ongoing design support and component procurement. Texas Instruments manufactures functionally equivalent alternatives within the 74CBT3244 series that maintain electrical and mechanical compatibility across multiple package options.

Key Parameters

Parameter	Value
Manufacturer Part Number	PI5C3244LE
Manufacturer	Diodes Incorporated
Type	Bus Switch
Circuit Configuration	4 x 1:1
Independent Circuits	2
Voltage Supply	4.75V ~ 5.25V
Operating Temperature Range	-40°C ~ 85°C
Package Type	20-TSSOP (0.173", 4.40mm Width)
Mounting Type	Surface Mount
Product Status	Obsolete
RoHS Status	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)

Substitute Part Grouping Explanation

Substitution of the PI5C3244LE is determined by the following critical parameters:

Functional Equivalence: All substitute parts maintain the 4 x 1:1 bus switch configuration with 2 independent circuits, ensuring identical signal routing capability.

Package Compatibility: Substitutes are grouped by package type. The PI5C3244LE uses 20-TSSOP packaging. Direct pin-compatible replacements include SN74CBT3244CPW and SN74CBT3244CPWR, which use identical 20-TSSOP packages. Alternative packages (20-SSOP and 20-TVSOP) require PCB layout verification but maintain electrical equivalence.

Voltage Supply Range: The PI5C3244LE operates at 4.75V ~ 5.25V. All Texas Instruments 74CBT3244 substitutes support broader ranges (4V ~ 5.5V or 4.5V ~ 5.5V), ensuring compatibility within the original specification window.

Operating Temperature: All substitutes maintain the -40°C ~ 85°C operating range, matching the original part specification.

Compliance & Certification: All substitutes are ROHS3 compliant and REACH unaffected, maintaining regulatory equivalence with the original part.

Parameter Comparison

Parameter	PI5C3244LE	SN74CBT3244CPW	SN74CBT3244CPWR	SN74CBT3244CDBQR	SN74CBT3244CDGVR	SN74CBT3244DBR	SN74CBT3244DGVR	SN74CBT3244PW	SN74CBT3244PWR
Manufacturer	Diodes Inc.	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments	Texas Instruments
Circuit Configuration	4 x 1:1	4 x 1:1	4 x 1:1	4 x 1:1	4 x 1:1	4 x 1:1	4 x 1:1	4 x 1:1	4 x 1:1
Independent Circuits	2	2	2	2	2	2	2	2	2
Voltage Supply Range	4.75V ~ 5.25V	4V ~ 5.5V	4V ~ 5.5V	4V ~ 5.5V	4V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V	4.5V ~ 5.5V
Operating Temperature	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C	-40°C ~ 85°C
Package Type	20-TSSOP	20-TSSOP	20-TSSOP	20-SSOP	20-TVSOP	20-SSOP	20-TVSOP	20-TSSOP	20-TSSOP
Package Dimensions	0.173" × 4.40mm	0.173" × 4.40mm	0.173" × 4.40mm	0.154" × 3.90mm	0.173" × 4.40mm	0.209" × 5.30mm	0.173" × 4.40mm	0.173" × 4.40mm	0.173" × 4.40mm
Mounting Type	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount	Surface Mount
Product Status	Obsolete	Active	Active	Active	Active	Last Time Buy	Last Time Buy	Last Time Buy	Obsolete
RoHS Status	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant	ROHS3 Compliant
Moisture Sensitivity Level	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	2 (1 Year)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)	1 (Unlimited)

Engineering Selection Recommendations

Primary Substitutes (Direct Pin Compatibility): SN74CBT3244CPW and SN74CBT3244CPWR are the preferred replacements for PI5C3244LE. Both use identical 20-TSSOP packaging with matching 0.173" × 4.40mm dimensions, requiring no PCB layout modifications. SN74CBT3244CPWR is currently active and widely available, making it the optimal choice for new designs and ongoing production.

Active Status Priority: SN74CBT3244CDBQR and SN74CBT3244CDGVR maintain active product status, ensuring long-term availability and manufacturing support. These parts are suitable for designs requiring extended component lifecycle assurance.

Last Time Buy Considerations: SN74CBT3244DBR, SN74CBT3244DGVR, SN74CBT3244PW, and SN74CBT3244PWR are designated Last Time Buy. While functionally equivalent, these parts have limited remaining availability and should not be selected for new long-term production programs.

Package Alternatives: SN74CBT3244CDBQR and SN74CBT3244DBR (20-SSOP, 0.154" × 3.90mm) and SN74CBT3244CDGVR and SN74CBT3244DGVR (20-TVSOP, 0.173" × 4.40mm) provide functional equivalence with different package footprints. These require PCB redesign but maintain electrical compatibility within the specified voltage and temperature ranges.

Compliance Assurance: All recommended substitutes maintain ROHS3 compliance and REACH unaffected status, ensuring regulatory alignment with the original PI5C3244LE specification.

Frequently Asked Questions (FAQ)

Q: Can SN74CBT3244CPWR directly replace PI5C3244LE without PCB modifications?

A: Yes. SN74CBT3244CPWR uses identical 20-TSSOP packaging with matching 0.173" × 4.40mm dimensions and pin configuration. No PCB layout changes are required for direct substitution.

Q: What is the difference between 20-TSSOP, 20-SSOP, and 20-TVSOP packages?

A: These are distinct surface-mount package types with different physical dimensions. 20-TSSOP (0.173" × 4.40mm) matches the original PI5C3244LE. 20-SSOP packages vary in width (0.154" or 0.209"), and 20-TVSOP uses 0.173" × 4.40mm dimensions. Substitution between package types requires PCB footprint verification and potential layout redesign.

Q: Are all Texas Instruments 74CBT3244 variants electrically equivalent to PI5C3244LE?

A: Yes. All listed Texas Instruments SN74CBT3244 variants maintain the 4 x 1:1 bus switch configuration, 2 independent circuits, and -40°C ~ 85°C operating temperature range. Voltage supply ranges are broader (4V ~ 5.5V or 4.5V ~ 5.5V) than the original specification (4.75V ~ 5.25V), ensuring full compatibility.

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

A: SN74CBT3244CPWR is the recommended choice. It maintains active product status, uses identical 20-TSSOP packaging, and has the highest inventory availability. SN74CBT3244CDBQR and SN74CBT3244CDGVR are alternative active-status options if package alternatives are acceptable.

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

A: Last Time Buy indicates that the manufacturer will discontinue production after a specified date. Parts with this designation have limited remaining availability and should not be selected for new long-term production programs. Active-status parts are preferred for designs requiring extended component lifecycle.

Q: Do all substitutes have the same moisture sensitivity level?

A: No. PI5C3244LE and most Texas Instruments substitutes have MSL 1 (Unlimited). However, SN74CBT3244CDBQR and SN74CBT3244DBR have MSL 2 (1 Year), requiring stricter moisture control during storage and handling. This difference does not affect electrical performance but impacts component shelf-life management.

Q: Are there any voltage supply differences that affect circuit design?

A: The original PI5C3244LE operates at 4.75V ~ 5.25V. All substitutes support this range within their broader specifications (4V ~ 5.5V or 4.5V ~ 5.5V). No circuit design modifications are required for voltage compatibility.

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