HMC345LP3ETR RF Switch IC Equivalent & Substitute Parts

Part Overview

The HMC345LP3ETR is a general-purpose RF switch IC with SP4T (single-pole, four-throw) topology designed for operation up to 8 GHz. This component is classified as obsolete, making identification of suitable substitute parts essential for ongoing system support and new design implementations. The part operates at 5V supply voltage and is packaged in a 16-VFQFN surface-mount configuration with exposed pad.

Substiute Parts

HMC345LP3ETR

Analog Devices Inc.In Stock: 17824HMC345LP3ETR Datasheet

Current PartRFQ

HMC345ALP3E

Analog Devices Inc.In Stock: 2228HMC345ALP3E Datasheet

SimilarRFQ

Key Parameters

Substitute Part Grouping Explanation

Substitution eligibility for the HMC345LP3ETR is determined by the following critical parameters:

• Circuit configuration must be SP4T
• Frequency range must support 0 Hz ~ 8 GHz operation
• Topology must be absorptive
• Package must be 16-VFQFN Exposed Pad (3x3)
• Supply voltage must be 5V
• Operating temperature range must encompass -40°C ~ 85°C
• Mounting type must be surface mount

The HMC345ALP3E meets these substitution criteria. While this part is active (versus obsolete), it maintains functional and mechanical compatibility with the original HMC345LP3ETR. Both parts share the same base product number (HMC345) and are manufactured by Analog Devices Inc.

Parameter Comparison

Engineering Selection Recommendations

The HMC345ALP3E is the direct substitute for the obsolete HMC345LP3ETR. Both parts maintain identical circuit topology, frequency range, insertion loss, and supply voltage specifications. The HMC345ALP3E offers improved performance in isolation (33 dB vs. 32 dB) and P1dB rating (28 dBm vs. 21 dBm), making it suitable for applications requiring higher linearity.

Key considerations for selection:

• The HMC345ALP3E is active production status, ensuring long-term availability and supply chain stability
• ROHS3 compliance of the HMC345ALP3E supports regulatory requirements for new designs
• The HMC345ALP3E supports 50 Ohm impedance only, whereas the HMC345LP3ETR supports both 50 Ohm and 75 Ohm; applications requiring 75 Ohm operation must evaluate alternative solutions
• Moisture sensitivity level differs (MSL 3 vs. MSL 1); storage and handling procedures must be adjusted accordingly for the HMC345ALP3E

Frequently Asked Questions (FAQ)

Q: Can the HMC345ALP3E directly replace the HMC345LP3ETR in existing designs?

A: Yes, for applications operating at 50 Ohm impedance. Both parts share identical package geometry (16-VFQFN 3x3), supply voltage (5V), frequency range (0-8 GHz), and operating temperature range (-40°C to 85°C). The HMC345ALP3E provides equal or superior electrical performance. Applications requiring 75 Ohm operation cannot use the HMC345ALP3E as a direct substitute.

Q: What are the key electrical differences between these parts?

A: The HMC345ALP3E provides improved isolation (33 dB vs. 32 dB) and higher P1dB rating (28 dBm vs. 21 dBm). IIP3 is slightly lower (43 dBm vs. 45 dBm). Insertion loss remains identical at 2.4 dB.

Q: Are there packaging or handling differences?

A: Both parts use identical 16-VFQFN surface-mount packages. However, moisture sensitivity differs: HMC345LP3ETR is MSL 1 (unlimited shelf life), while HMC345ALP3E is MSL 3 (168-hour limit after moisture exposure). Storage and reflow procedures must follow MSL 3 requirements for the HMC345ALP3E.

Q: Why is the HMC345LP3ETR obsolete?

A: The HMC345LP3ETR is classified as obsolete by Analog Devices Inc. The HMC345ALP3E represents the active production equivalent within the HMC345 product family.

Q: What impedance options are available?

A: The HMC345LP3ETR supports both 50 Ohm and 75 Ohm impedance. The HMC345ALP3E supports 50 Ohm impedance only. System designs requiring 75 Ohm operation must identify alternative RF switch solutions.