R574493485 RF Switch IC SP4T 18GHz Equivalent & Substitute Parts

Part Overview

The R574493485 is a general-purpose RF switch integrated circuit with SP4T (single-pole four-throw) topology manufactured by Radiall USA, Inc. This component operates across a frequency range of 0Hz to 18GHz with 50-ohm impedance and is designed for RF switching applications requiring high isolation and low insertion loss characteristics.

The R574493485 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	R574493485
Manufacturer	Radiall USA, Inc.
Circuit Configuration	SP4T
Frequency Range	0Hz ~ 18GHz
Impedance	50Ohm
Isolation (Minimum)	60dB
Insertion Loss (Maximum)	0.5dB
Test Frequency	18GHz
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 R574493485 are classified based on strict electrical and mechanical parameter alignment. The primary substitution criteria are:

Critical Parameters for Substitution:

Circuit topology (SP4T or SP3T configuration)
Frequency range capability (0Hz ~ 18GHz)
Impedance specification (50Ohm)
Isolation performance (60dB minimum)
Insertion loss (0.5dB maximum)
Supply voltage range (24V ~ 30V)
Operating temperature range (-40°C ~ 85°C)
Package type (Module)

Substitution Categories:

Category 1: Direct SP4T Equivalents (Active Status) Parts R573413400 and R573413405 maintain identical SP4T topology with all electrical parameters matching the original specification. These components are currently in active production status.

Category 2: SP3T Alternatives (Active Status) Parts R573413300, R573413305, R573413310, R573413315, R573413320, R573413330, R573413340, and R573413345 provide SP3T topology with equivalent electrical performance across frequency, impedance, isolation, and insertion loss parameters. These components are suitable for applications where three-throw switching functionality satisfies design requirements.

All substitute parts maintain the same frequency range, impedance, isolation, insertion loss, supply voltage, operating temperature, and module packaging as the original R574493485.

Parameter Comparison

Part Number	Circuit	Frequency Range	Impedance	Isolation (Min)	Insertion Loss (Max)	Supply Voltage	Operating Temp	Package	Product Status
R574493485	SP4T	0Hz ~ 18GHz	50Ohm	60dB	0.5dB	24V ~ 30V	-40°C ~ 85°C	Module	Obsolete
R573413400	SP4T	0Hz ~ 18GHz	50Ohm	60dB	0.5dB	24V ~ 30V	-40°C ~ 85°C	Module	Active
R573413405	SP4T	0Hz ~ 18GHz	50Ohm	60dB	0.5dB	24V ~ 30V	-40°C ~ 85°C	Module	Active
R573413300	SP3T	0Hz ~ 18GHz	50Ohm	60dB	0.5dB	24V ~ 30V	-40°C ~ 85°C	Module	Active
R573413305	SP3T	0Hz ~ 18GHz	50Ohm	60dB	0.5dB	24V ~ 30V	-40°C ~ 85°C	Module	Active
R573413310	SP3T	0Hz ~ 18GHz	50Ohm	60dB	0.5dB	24V ~ 30V	-40°C ~ 85°C	Module	Active
R573413315	SP3T	0Hz ~ 18GHz	50Ohm	60dB	0.5dB	24V ~ 30V	-40°C ~ 85°C	Module	Active
R573413320	SP3T	0Hz ~ 18GHz	50Ohm	60dB	0.5dB	24V ~ 30V	-40°C ~ 85°C	Module	Active
R573413330	SP3T	0Hz ~ 18GHz	50Ohm	60dB	0.5dB	24V ~ 30V	-40°C ~ 85°C	Module	Active
R573413340	SP3T	0Hz ~ 18GHz	50Ohm	60dB	0.5dB	24V ~ 30V	-40°C ~ 85°C	Module	Active
R573413345	SP3T	0Hz ~ 18GHz	50Ohm	60dB	0.5dB	24V ~ 30V	-40°C ~ 85°C	Module	Active

Engineering Selection Recommendations

For Direct Replacement (SP4T Topology):

R573413400 and R573413405 are active-status SP4T RF switch ICs that provide direct functional equivalence to the obsolete R574493485. Both parts maintain identical electrical specifications across all critical parameters including frequency range, impedance, isolation, insertion loss, supply voltage, and operating temperature. Selection between these two active alternatives depends on inventory availability and procurement lead times.

For Functional Substitution (SP3T Topology):

The SP3T alternatives (R573413300, R573413305, R573413310, R573413315, R573413320, R573413330, R573413340, R573413345) are suitable for applications where the design can accommodate three-throw switching functionality instead of four-throw. These parts maintain all electrical performance characteristics and are in active production status. Parts R573413310, R573413320, R573413330, and R573413345 carry ROHS3 compliance certification, providing additional environmental compliance documentation for regulated applications.

Selection Priority:

R573413400 or R573413405 for direct SP4T replacement requirements
SP3T alternatives for designs compatible with three-throw topology
ROHS3-compliant SP3T variants (R573413310, R573413320, R573413330, R573413345) for applications requiring environmental compliance documentation

Frequently Asked Questions (FAQ)

Q: Can R573413400 or R573413405 be used as direct replacements for R574493485?

A: Yes. Both R573413400 and R573413405 are active-status SP4T RF switch ICs with identical electrical specifications to the obsolete R574493485. All critical parameters including frequency range (0Hz ~ 18GHz), impedance (50Ohm), isolation (60dB minimum), insertion loss (0.5dB maximum), supply voltage (24V ~ 30V), operating temperature (-40°C ~ 85°C), and module packaging are equivalent.

Q: What is the difference between SP4T and SP3T configurations?

A: SP4T (single-pole four-throw) provides four output switching positions, while SP3T (single-pole three-throw) provides three output switching positions. The SP3T alternatives are suitable for applications requiring only three switching paths. All other electrical performance characteristics remain identical between the two topologies.

Q: Are the SP3T alternatives electrically compatible with the original SP4T design?

A: SP3T alternatives maintain equivalent electrical performance across frequency range, impedance, isolation, insertion loss, supply voltage, and operating temperature specifications. Compatibility depends on whether the application design requires four-throw or three-throw switching functionality. If the design uses only three of the four switching paths, SP3T alternatives provide full electrical compatibility.

Q: What does ROHS3 compliance indicate?

A: ROHS3 compliance indicates the component meets Restriction of Hazardous Substances Directive requirements. Parts R573413310, R573413320, R573413330, and R573413345 carry this certification. Non-ROHS3-certified alternatives (R573413300, R573413305, R573413315, R573413340, R573413345) remain electrically equivalent but lack this specific environmental compliance documentation.

Q: Are all substitute parts available in the same packaging format?

A: Yes. All substitute parts are supplied in module packaging identical to the original R574493485. Packaging format does not differentiate between substitute options.

Q: What inventory levels are available for substitute parts?

A: Inventory availability varies across substitute options. R573413340 and R573413310 maintain the highest inventory levels (1068 and 1030 units respectively), while R573413320 and R573413345 maintain lower inventory (689 and 696 units respectively). R573413400 and R573413405 SP4T alternatives maintain 738 and 732 units respectively.

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