R574403635 RF Switch IC SP6T 18GHz Equivalent & Substitute Parts

Part Overview

The R574403635 is a general-purpose RF switch IC with SP6T (single-pole, six-throw) topology manufactured by Radiall USA, Inc. This component operates across a frequency range of 0Hz to 18GHz with 50-ohm impedance and is housed in a module package. The part is currently classified as obsolete, necessitating identification of active equivalent and substitute components to maintain design continuity and ensure procurement availability for new applications and legacy system support.

Key Parameters

Parameter	Value
Manufacturer Part Number	R574403635
Manufacturer	Radiall USA, Inc.
Circuit Configuration	SP6T
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

Substitution of the R574403635 is determined by strict adherence to the following electrical and mechanical parameters:

Primary Substitution Criteria:

Circuit configuration (SP6T or SP5T topology)
Frequency range capability (0Hz ~ 18GHz minimum)
Impedance matching (50Ohm)
Isolation performance (60dB minimum)
Insertion loss specification (0.5dB maximum)
Supply voltage compatibility (24V ~ 30V)
Operating temperature range (-40°C ~ 85°C)
Package type (Module)

Substitution Categories:

Direct Equivalent (SP6T Configuration): Parts maintaining identical SP6T topology with all electrical parameters matching the original specification. These include R574G03635, R573403600, R573403605, R573403610, R573403610LP, and R573403615.

Parametric Equivalent (SP5T Configuration): Parts with SP5T topology (reduced from six throws to five throws) that maintain all other electrical parameters. These include R573403510, R573403515, R573403520, and R573403540. These parts are suitable for applications where the reduced throw count does not impact circuit functionality.

Manufacturer Recommended Upgrade: R574G03635 represents the manufacturer-recommended direct replacement, featuring active product status and enhanced packaging options including SMA connectors.

Parameter Comparison

Part Number	Circuit	Frequency Range	Isolation (Min)	Insertion Loss (Max)	Impedance	Supply Voltage	Operating Temp	Product Status	Inventory
R574403635	SP6T	0Hz ~ 18GHz	60dB	0.5dB	50Ohm	24V ~ 30V	-40°C ~ 85°C	Obsolete	994 Pcs
R574G03635	SP6T	DC ~ 18GHz	60dB	0.5dB	50Ohm	24V ~ 30V	-40°C ~ 85°C	Active	1010 Pcs
R573403510	SP5T	0Hz ~ 18GHz	60dB	0.5dB	50Ohm	24V ~ 30V	-40°C ~ 85°C	Active	716 Pcs
R573403515	SP5T	0Hz ~ 18GHz	60dB	0.5dB	50Ohm	24V ~ 30V	-40°C ~ 85°C	Active	953 Pcs
R573403520	SP5T	0Hz ~ 18GHz	60dB	0.5dB	50Ohm	24V ~ 30V	-40°C ~ 85°C	Active	955 Pcs
R573403540	SP5T	0Hz ~ 18GHz	60dB	0.5dB	50Ohm	24V ~ 30V	-40°C ~ 85°C	Active	722 Pcs
R573403600	SP6T	0Hz ~ 18GHz	60dB	0.5dB	50Ohm	24V ~ 30V	-40°C ~ 85°C	Active	1004 Pcs
R573403605	SP6T	0Hz ~ 18GHz	60dB	0.5dB	50Ohm	24V ~ 30V	-40°C ~ 85°C	Active	871 Pcs
R573403610	SP6T	0Hz ~ 18GHz	60dB	0.5dB	50Ohm	24V ~ 30V	-40°C ~ 85°C	Active	681 Pcs
R573403610LP	SP6T	0Hz ~ 18GHz	60dB	0.5dB	50Ohm	24V ~ 30V	-40°C ~ 85°C	Active	677 Pcs
R573403615	SP6T	0Hz ~ 18GHz	60dB	0.5dB	50Ohm	24V ~ 30V	-40°C ~ 85°C	Active	980 Pcs

Engineering Selection Recommendations

For Direct Replacement (SP6T Topology Required):

Select R574G03635 as the primary replacement option. This part is the manufacturer-recommended equivalent, maintains active product status, and provides enhanced packaging with SMA connectors. Alternative SP6T options include R573403600, R573403605, R573403610, R573403610LP, and R573403615, all of which maintain identical electrical specifications and active product status.

For Applications Tolerant of Reduced Throw Count (SP5T Topology):

Parts R573403510, R573403515, R573403520, and R573403540 provide parametric equivalence with SP5T configuration. These components maintain all critical electrical parameters including frequency range, impedance, isolation, insertion loss, supply voltage, and operating temperature range. Selection among these SP5T variants should be based on inventory availability and specific application requirements.

Compliance Considerations:

Multiple substitute parts carry ROHS3 compliance certification (R573403520, R573403540, R573403600, R573403610), providing environmental regulatory alignment for new designs. Parts without specified RoHS status remain functionally equivalent for electrical performance.

Inventory Availability:

All substitute parts maintain active product status with adequate inventory levels ranging from 677 to 1010 pieces, ensuring procurement reliability for production requirements.

Frequently Asked Questions (FAQ)

Q: Can R574G03635 be used as a direct replacement for R574403635?

A: Yes. R574G03635 is the manufacturer-recommended equivalent. Both parts maintain SP6T topology, identical electrical specifications (60dB isolation, 0.5dB insertion loss, 50-ohm impedance, 24V-30V supply, -40°C to 85°C operating range), and module packaging. R574G03635 offers enhanced packaging options with SMA connectors and active product status.

Q: What is the difference between SP6T and SP5T configurations?

A: SP6T (single-pole, six-throw) provides six output positions, while SP5T (single-pole, five-throw) provides five output positions. All other electrical parameters remain identical. SP5T parts are suitable for applications requiring five or fewer switch positions.

Q: Are SP5T parts suitable substitutes for SP6T applications?

A: SP5T parts are parametric equivalents only for applications where the reduced throw count does not impact circuit functionality. Applications requiring all six switch positions must use SP6T topology parts.

Q: What packaging differences exist among the substitute parts?

A: All parts utilize module packaging. R574G03635 specifically includes SMA connectors as part of its enhanced packaging. Other variants maintain standard module configuration. Connector type should be verified against application interface requirements.

Q: Which substitute parts carry RoHS3 compliance?

A: R573403520, R573403540, R573403600, and R573403610 are specified as ROHS3 compliant. Other parts do not have specified RoHS status in the provided data.

Q: How do the frequency ranges compare between the original part and substitutes?

A: The original R574403635 operates from 0Hz to 18GHz. R574G03635 extends the lower frequency limit to DC. All other substitute parts maintain the 0Hz to 18GHz range. This difference is not functionally significant for most applications.

Q: What inventory levels are available for each substitute part?

A: Inventory ranges from 677 to 1010 pieces across all substitute options. R574G03635 offers the highest inventory at 1010 pieces, while R573403610LP offers the lowest at 677 pieces.

Q: Are all substitute parts rated for the same operating temperature range?

A: Yes. All substitute parts maintain the -40°C to 85°C operating temperature range, ensuring thermal compatibility with the original specification.

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