PI3L500ZFE Equivalent & Substitute Parts

Part Overview

The PI3L500ZFE is an 8-channel Ethernet switch IC manufactured by Diodes Incorporated in a 56-TQFN package. This component is designed for telecommunications applications requiring high-speed signal switching with 10/100/1000 Base-T capability. The product is currently obsolete, making identification of compatible substitute parts essential for system redesign, legacy product support, and procurement planning.

Substiute Parts

PI3L500ZFE

Diodes IncorporatedIn Stock: 23587PI3L500ZFE Datasheet

Current PartRFQ

TS3L500AERHUR

Texas InstrumentsIn Stock: 18927TS3L500AERHUR Datasheet

MFR RecommendedRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PI3L500ZFE is determined by the following critical parameters:

Package Compatibility: Both the main part and substitute must use the 56-WFQFN Exposed Pad package to ensure PCB footprint compatibility and thermal management characteristics.

Electrical Supply: Single supply voltage range of 3V to 3.6V is required for direct pin-level compatibility.

Operating Temperature Range: The -40°C to 85°C specification must be maintained to ensure reliability across the intended application environment.

Ethernet Protocol Support: 10/100/1000 Base-T capability is mandatory for telecommunications and networking applications.

Compliance Standards: RoHS3 compliance and REACH unaffected status ensure regulatory alignment for current manufacturing and distribution.

The TS3L500AERHUR from Texas Instruments meets these core substitution criteria while offering enhanced performance characteristics in bandwidth and channel configuration.

Parameter Comparison

Engineering Selection Recommendations

The TS3L500AERHUR is a valid substitute for the PI3L500ZFE based on matching package geometry, supply voltage specifications, operating temperature range, and Ethernet protocol support. Both components are ROHS3 compliant and REACH unaffected, ensuring regulatory compliance for current manufacturing environments.

The substitute part offers active product status, providing long-term availability and manufacturing support compared to the obsolete PI3L500ZFE. The enhanced bandwidth specification (950 MHz versus 350 MHz) and additional channel count (11 versus 8) provide performance headroom for telecommunications and networking applications.

The on-state resistance increase from 6.5 Ohm to 8 Ohm remains within acceptable limits for Ethernet switching applications and does not compromise signal integrity for 10/100/1000 Base-T protocols.

Frequently Asked Questions (FAQ)

Q: Can the TS3L500AERHUR directly replace the PI3L500ZFE on existing PCBs?

A: Yes. Both components use the identical 56-WFQFN Exposed Pad package with matching pinout compatibility for core Ethernet switching functions. PCB layout modifications are not required for package substitution.

Q: What is the impact of the 8 Ohm on-state resistance versus 6.5 Ohm?

A: The 1.5 Ohm increase in on-state resistance is within acceptable operating margins for Ethernet switch applications. Signal attenuation and thermal dissipation remain compliant with 10/100/1000 Base-T specifications.

Q: Does the TS3L500AERHUR support the same supply voltage range?

A: Yes. Both parts operate on a single 3V to 3.6V supply, ensuring direct compatibility with existing power distribution circuits.

Q: Why does the substitute part have 11 channels instead of 8?

A: The TS3L500AERHUR provides additional switching channels, offering expanded functionality without compromising backward compatibility. Unused channels can remain unconnected in applications requiring only 8-channel operation.

Q: Are there any moisture sensitivity differences between the two parts?

A: Yes. The PI3L500ZFE has MSL 1 (Unlimited), while the TS3L500AERHUR has MSL 2 (1 Year). The substitute requires standard moisture control during storage and handling per IPC-A-610 guidelines.

Q: What is the bandwidth advantage of the substitute part?

A: The TS3L500AERHUR provides 950 MHz bandwidth compared to 350 MHz in the original part. This enhanced bandwidth supports higher-speed signal switching and provides performance margin for future telecommunications applications.