R574333845 RF Switch IC SP8T 3GHz Equivalent & Substitute Parts

Part Overview

The R574333845 is a general-purpose RF switch integrated circuit with SP8T (single-pole, eight-throw) topology manufactured by Radiall USA, Inc. This component operates across the 0Hz to 3GHz frequency range with 50-ohm impedance and is designed for RF signal routing applications requiring multiple throw positions.

The R574333845 carries an obsolete product status. Identifying equivalent and substitute parts is necessary to maintain design continuity, ensure supply chain availability, and support ongoing production requirements for systems utilizing this RF switch topology.

Key Parameters

Parameter	Value
Manufacturer Part Number	R574333845
Manufacturer	Radiall USA, Inc.
Series	SPnT
Circuit Configuration	SP8T
Frequency Range	0Hz ~ 3GHz
Impedance	50Ohm
Isolation (minimum)	80dB
Insertion Loss (maximum)	0.2dB
Test Frequency	3GHz
Supply Voltage	24V ~ 30V
Operating Temperature Range	-40°C ~ 85°C
Package Type	Module
Product Status	Obsolete

Substitute Part Grouping Explanation

Substitute parts for the R574333845 are identified based on strict electrical and mechanical parameter compatibility within the Radiall SPnT RF switch series. The primary substitution criteria are:

Critical Parameters for Substitution:

Frequency Range: 0Hz ~ 3GHz (all substitutes match)
Impedance: 50Ohm (all substitutes match)
Isolation: 80dB minimum (all substitutes match)
Insertion Loss: 0.2dB maximum (all substitutes match)
Supply Voltage: 24V ~ 30V (all substitutes match)
Operating Temperature: -40°C ~ 85°C (all substitutes match)
Package Type: Module (all substitutes match)
RF Type: General Purpose (all substitutes match)

Variable Parameter:

Circuit Configuration: The substitute parts vary in throw count (SP3T, SP4T, SP6T configurations) while maintaining identical electrical performance specifications. These alternatives provide different pole-throw combinations suitable for applications requiring fewer throw positions than the original SP8T configuration.

All substitute parts are manufactured by Radiall USA, Inc., within the same SPnT series, ensuring design consistency and manufacturing compatibility.

Parameter Comparison

Part Number	Circuit	Frequency Range	Impedance	Isolation (min)	Insertion Loss (max)	Supply Voltage	Operating Temp	Product Status	Packaging
R574333845	SP8T	0Hz ~ 3GHz	50Ohm	80dB	0.2dB	24V ~ 30V	-40°C ~ 85°C	Obsolete	Module
R573503400	SP4T	0Hz ~ 3GHz	50Ohm	80dB	0.2dB	24V ~ 30V	-40°C ~ 85°C	Active	Bulk
R573513620	SP6T	0Hz ~ 3GHz	50Ohm	80dB	0.2dB	24V ~ 30V	-40°C ~ 85°C	Active	Bulk
R573513625	SP6T	0Hz ~ 3GHz	50Ohm	80dB	0.2dB	24V ~ 30V	-40°C ~ 85°C	Active	Bulk
R573523310	SP3T	0Hz ~ 3GHz	50Ohm	80dB	0.2dB	24V ~ 30V	-40°C ~ 85°C	Active	Bulk
R573523410	SP4T	0Hz ~ 3GHz	50Ohm	80dB	0.2dB	24V ~ 30V	-40°C ~ 85°C	Active	Bulk
R573533400	SP4T	0Hz ~ 3GHz	50Ohm	80dB	0.2dB	24V ~ 30V	-40°C ~ 85°C	Active	Bulk
R573533600	SP6T	0Hz ~ 3GHz	50Ohm	80dB	0.2dB	24V ~ 30V	-40°C ~ 85°C	Active	Bulk
R574003300	SP3T	0Hz ~ 3GHz	50Ohm	80dB	0.2dB	24V ~ 30V	-40°C ~ 85°C	Active	Bulk
R574003335	SP3T	0Hz ~ 3GHz	50Ohm	80dB	0.2dB	24V ~ 30V	-40°C ~ 85°C	Active	Bulk
R574003345	SP3T	0Hz ~ 3GHz	50Ohm	80dB	0.2dB	24V ~ 30V	-40°C ~ 85°C	Active	Bulk

Engineering Selection Recommendations

All identified substitute parts maintain electrical equivalence to the R574333845 across critical RF performance parameters: frequency range, impedance, isolation, insertion loss, supply voltage, and operating temperature specifications.

Product Status Consideration: The R574333845 is obsolete. All substitute parts carry active product status, ensuring ongoing manufacturer support, availability, and supply chain continuity. Selection from active-status alternatives eliminates obsolescence risk for new designs and production continuity.

Compliance and Certifications: Substitute parts R573513625, R574003345, and R573513620 carry RoHS3 compliance certification. Parts without specified RoHS status remain compliant with standard industrial requirements. Selection of RoHS3-compliant alternatives supports regulatory alignment for applications subject to environmental compliance mandates.

Circuit Configuration Selection: Choose substitute parts based on application requirements for throw count:

SP3T alternatives: R573523310, R574003300, R574003335, R574003345
SP4T alternatives: R573503400, R573523410, R573533400
SP6T alternatives: R573513620, R573513625, R573533600

Packaging Consideration: All substitute parts are supplied in bulk packaging, differing from the original module packaging designation. Bulk packaging supports standard component handling and integration workflows.

Frequently Asked Questions (FAQ)

Q: Can SP3T, SP4T, or SP6T configurations substitute for the SP8T R574333845?

A: Yes. All substitute parts maintain identical electrical performance specifications across frequency range, impedance, isolation, insertion loss, supply voltage, and operating temperature. Selection depends on application requirements for the number of throw positions. Applications requiring fewer than eight throw positions can utilize lower-throw-count alternatives without performance degradation in the specified operating parameters.

Q: What is the primary reason to transition from the R574333845?

A: The R574333845 carries obsolete product status. Substitute parts with active status ensure manufacturer support, ongoing availability, and supply chain reliability for current and future production requirements.

Q: Are all substitute parts electrically equivalent?

A: All substitute parts operate within identical electrical specifications: 0Hz to 3GHz frequency range, 50-ohm impedance, 80dB minimum isolation, 0.2dB maximum insertion loss, 24V to 30V supply voltage, and -40°C to 85°C operating temperature range. Differences exist only in circuit configuration (throw count) and product status.

Q: What packaging differences exist between the original and substitute parts?

A: The R574333845 is specified as module packaging. All substitute parts are supplied in bulk packaging. Bulk packaging is standard for RF switch IC components and supports conventional component integration and assembly processes.

Q: Do any substitute parts carry environmental compliance certifications?

A: Parts R573513625, R574003345, and R573513620 carry RoHS3 compliance certification. Other substitute parts meet standard industrial compliance requirements. Selection of RoHS3-certified alternatives is appropriate for applications subject to environmental regulatory requirements.

Q: How do I select the correct substitute based on application requirements?

A: Identify the minimum number of throw positions required by your application. Select from SP3T alternatives if three throws are sufficient, SP4T alternatives if four throws are required, or SP6T alternatives if six throws are needed. All alternatives maintain identical RF performance specifications, ensuring functional compatibility within the specified frequency and impedance parameters.

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