PE42556DI RF Switch IC SPDT 14.6GHz Equivalent & Substitute Parts

Part Overview

The PE42556DI is an RF Switch IC with SPDT (Single Pole Double Throw) topology designed for absorptive switching applications across the 9kHz to 14.6GHz frequency range. Manufactured by pSemi under the UltraCMOS® series, this component is packaged in a 14-FlipChip (1.1x2) form factor with 50Ohm impedance matching for RF applications.

The PE42556DI has reached obsolete product status. Identifying equivalent substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for systems utilizing this RF switching topology.

Substiute Parts

PE42556DI

pSemiIn Stock: 744PE42556DI Datasheet

Current PartRFQ

PE42520C-Z

pSemiIn Stock: 24978PE42520C-Z Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution of the PE42556DI is determined by the following critical parameters:

• Circuit Configuration: SPDT topology required for equivalent functional replacement
• Impedance: 50Ohm matching for RF signal path compatibility
• Frequency Range Overlap: Operating range must encompass or exceed the 9kHz to 14.6GHz specification
• Absorptive Topology: Switching architecture must maintain absorptive characteristics
• Surface Mount Packaging: Physical form factor compatibility with existing PCB layouts
• Supply Voltage Compatibility: Operating voltage range must support system power distribution
• Operating Temperature Range: -40°C to 85°C thermal envelope for industrial applications

The PE42520C-Z qualifies as a substitute part based on these parameters. Both components share SPDT absorptive topology, 50Ohm impedance, overlapping frequency coverage, surface mount construction, and compatible operating temperature ranges. The PE42520C-Z operates across 9kHz to 13GHz with extended supply voltage range (2.3V to 5.5V), providing broader system integration flexibility.

Parameter Comparison

Engineering Selection Recommendations

The PE42520C-Z is an active production substitute for the obsolete PE42556DI. Both components are manufactured by pSemi and share the same SPDT absorptive RF switching topology with 50Ohm impedance and compatible operating temperature ranges.

The PE42520C-Z offers the following advantages for new designs and production transitions:

• Active Product Status: Ensures long-term availability and supply chain continuity
• Extended Supply Voltage Range: 2.3V to 5.5V operation provides flexibility across multiple power distribution architectures compared to the PE42556DI's 3V to 3.6V requirement
• ROHS3 Compliance: Meets current environmental and regulatory standards
• Higher IIP3 Performance: 66dBm IIP3 specification exceeds the PE42556DI's 56dBm rating

Package form factor differs between the two components. The PE42556DI uses 14-FlipChip (1.1x2) packaging, while the PE42520C-Z employs 16-VFQFN (3x3) packaging. PCB layout modifications are required to accommodate this package change.

Frequency range coverage differs slightly. The PE42520C-Z operates to 13GHz versus the PE42556DI's 14.6GHz upper limit. Applications requiring operation above 13GHz require evaluation against specific system requirements.

Frequently Asked Questions (FAQ)

Q: Can the PE42520C-Z directly replace the PE42556DI without PCB modifications?

A: No. The PE42556DI uses 14-FlipChip (1.1x2) packaging while the PE42520C-Z uses 16-VFQFN (3x3) packaging. PCB layout redesign is required to accommodate the different footprint and pin configuration.

Q: What is the frequency range difference between these parts?

A: The PE42556DI operates from 9kHz to 14.6GHz. The PE42520C-Z operates from 9kHz to 13GHz. Applications requiring operation above 13GHz must verify compatibility with the PE42520C-Z's upper frequency limit.

Q: Are both parts compatible with the same supply voltage?

A: The PE42556DI requires 3V to 3.6V supply voltage. The PE42520C-Z accepts 2.3V to 5.5V. The PE42520C-Z's extended voltage range provides broader system integration options. Existing designs operating at 3V to 3.6V are compatible with the PE42520C-Z.

Q: What are the isolation and insertion loss differences?

A: The PE42556DI provides 26dB isolation and 1.74dB insertion loss at 14.6GHz. The PE42520C-Z provides 18dB isolation and 2dB insertion loss at 13GHz. Applications with stringent isolation or insertion loss requirements must evaluate these performance differences against system specifications.

Q: Does the PE42520C-Z meet current compliance standards?

A: Yes. The PE42520C-Z is ROHS3 compliant and REACH unaffected. Both components carry EAR99 export classification.

Q: What is the moisture sensitivity difference?

A: The PE42556DI has MSL 1 (unlimited moisture sensitivity level). The PE42520C-Z has MSL 3 (168 hours). The PE42520C-Z requires controlled storage and handling within 168 hours of package opening to prevent moisture absorption.