F1375NBGI8 RF Demodulator IC Equivalent & Substitute Parts

Part Overview

The F1375NBGI8 is an RF demodulator integrated circuit manufactured by Renesas Electronics Corporation, designed for operation across the 1.3GHz to 2.9GHz frequency range. This component is classified as obsolete, necessitating identification of functionally equivalent alternatives for ongoing design requirements and production continuity. The part is housed in a 36-pin WFQFN package with exposed pad and operates from a 4.75V to 5.25V supply voltage.

Substiute Parts

F1375NBGI8

Renesas Electronics CorporationIn Stock: 760F1375NBGI8 Datasheet

Current PartRFQ

LT5517EUF#PBF

Analog Devices Inc.In Stock: 4194LT5517EUF#PBF Datasheet

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LT5546EUF#TRPBF

Analog Devices Inc.In Stock: 6442LT5546EUF#TRPBF Datasheet

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LTC5584IUF#PBF

Analog Devices Inc.In Stock: 2724LTC5584IUF#PBF Datasheet

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MAX2308ETI+T

Analog Devices Inc./Maxim IntegratedIn Stock: 643MAX2308ETI+T Datasheet

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Key Parameters

Substitute Part Grouping Explanation

Substitution of the F1375NBGI8 is determined by functional equivalence as an RF demodulator with surface mount packaging and RoHS3 compliance. The primary substitution criteria are:

Functional Requirements:

• Demodulator function classification
• Surface mount technology compatibility
• RoHS3 and REACH compliance status

Electrical Compatibility Considerations:

• RF frequency range overlap or coverage of the 1.3GHz to 2.9GHz band
• Supply voltage compatibility within the 4.75V to 5.25V range
• Gain and noise figure performance characteristics

Physical Compatibility:

• WFQFN package family with exposed pad configuration
• Pin count and footprint considerations for PCB integration

The substitute parts listed below satisfy the functional demodulator classification and compliance requirements. Frequency range coverage, gain characteristics, and noise figure performance vary across alternatives, requiring application-specific evaluation based on system requirements.

Parameter Comparison

Engineering Selection Recommendations

LTC5584IUF#PBF is an active product from Analog Devices Inc. with ROHS3 compliance and MSL 1 rating. This part provides the closest RF frequency coverage to the F1375NBGI8 within the 30MHz to 1.4GHz range, encompassing the lower portion of the original specification band. The 24-pin WFQFN package differs from the 36-pin original, requiring PCB layout modification. Supply voltage is fixed at 5.5V, which is outside the original 4.75V to 5.25V range.

LT5517EUF#PBF is an active product with ROHS3 compliance and MSL 1 rating. Operating range extends to 900MHz, covering the lower frequency applications within the original band. The 16-pin WQFN package represents a significant reduction in pin count. Supply voltage range of 4.5V to 5.25V provides partial overlap with the original specification. Current consumption of 110 mA is substantially lower than the original 270 mA.

LT5546EUF#TRPBF is an active product with ROHS3 compliance and MSL 1 rating. This part operates to 500MHz maximum frequency, limiting coverage to the lower end of the original specification. The 16-pin WQFN package and 24 mA supply current represent significant reductions in complexity and power consumption. Supply voltage range of 1.8V to 5.25V provides broad compatibility.

MAX2308ETI+T is an active product from Analog Devices Inc./Maxim Integrated with ROHS3 compliance and MSL 1 rating. Operating range of 70MHz to 300MHz provides the most limited frequency coverage among alternatives. The 28-pin WFQFN package maintains closer pin count proximity to the original. Supply voltage is fixed at 2.7V, requiring voltage regulation modification.

All substitute parts maintain surface mount technology, RoHS3 compliance, and MSL 1 moisture sensitivity rating. Selection requires evaluation of specific RF frequency requirements, supply voltage constraints, and PCB layout accommodation for package differences.

Frequently Asked Questions (FAQ)

Q: Can the F1375NBGI8 be directly replaced with any of these substitute parts without PCB modification?

A: No. All substitute parts employ different package configurations (16-pin, 24-pin, or 28-pin WFQFN versus the original 36-pin WFQFN). PCB layout modification is required for any substitution. Pin assignments and signal routing differ across all alternatives.

Q: Which substitute part covers the full 1.3GHz to 2.9GHz frequency range of the F1375NBGI8?

A: None of the listed substitute parts provide complete coverage of the 1.3GHz to 2.9GHz band. The LTC5584IUF#PBF extends to 1.4GHz, providing the highest upper frequency limit among alternatives. Applications requiring operation above 1.4GHz cannot be satisfied by these substitutes.

Q: Are all substitute parts RoHS3 compliant?

A: Yes. All four substitute parts (LTC5584IUF#PBF, LT5517EUF#PBF, LT5546EUF#TRPBF, and MAX2308ETI+T) are ROHS3 compliant with MSL 1 moisture sensitivity rating, matching the original F1375NBGI8 compliance status.

Q: What is the primary difference in supply voltage requirements?

A: The F1375NBGI8 operates within 4.75V to 5.25V. The LTC5584IUF#PBF requires a fixed 5.5V supply, exceeding the original maximum. The MAX2308ETI+T operates at a fixed 2.7V. The LT5517EUF#PBF (4.5V to 5.25V) and LT5546EUF#TRPBF (1.8V to 5.25V) provide voltage range compatibility with the original specification.

Q: How do noise figure specifications compare across alternatives?

A: The F1375NBGI8 specifies 18.2dB noise figure. Substitute parts offer improved noise performance: LTC5584IUF#PBF (9.9dB), LT5517EUF#PBF (12.4dB), LT5546EUF#TRPBF (7.8dB), and MAX2308ETI+T (6.36dB). Lower noise figure values indicate superior performance.

Q: What is the significance of the different package pin counts?

A: The original F1375NBGI8 uses 36 pins, while substitutes range from 16 to 28 pins. Fewer pins indicate reduced functionality or integration level. PCB routing, signal integrity considerations, and component placement strategies differ significantly across package sizes. Schematic redesign may be necessary to accommodate functional differences.

Q: Can supply current differences affect power supply design?

A: Yes. The F1375NBGI8 draws 270 mA, while substitutes range from 24 mA (LT5546EUF#TRPBF) to 110 mA (LT5517EUF#PBF). Lower current consumption reduces thermal load and power supply requirements. Existing power distribution networks may require redesign if selecting a substitute with significantly different current draw.

Q: Are all substitute parts available in the same packaging format (Tube or Tape & Reel)?

A: No. LTC5584IUF#PBF and LT5517EUF#PBF are supplied in Tube packaging. LT5546EUF#TRPBF and MAX2308ETI+T are supplied in Tape & Reel format. Packaging selection affects procurement, handling, and assembly processes.