SF2321D Murata Electronics Filter (Other) In Stock

Name: SF2321D
Brand: Murata Electronics
SKU: SF2321D
Availability: InStock

Murata SF2321D is a surface-mount SAW (Surface Acoustic Wave) bandpass filter centered at 1090 MHz with 50 Ω input and output impedance. It offers a maximum insertion loss of 3 dB and a compact 1.4 mm height profile, making it ideal for ADS-B receivers, aviation transponders, and ISM-band signal conditioning applications.

OBSOLETEFilterVerified Jun 2026

Package / Visual Reference

SF2321DOther

Quick Facts

Manufacturer: Murata Electronics
Package: Other
Pin Count: 6
Lifecycle: OBSOLETE
Datasheet: SF2321D Datasheet PDF
Category: Filter
Price: From $1.1330(MOQ 10)
Temp Range: -40.0°C to 85.0°C
RoHS: Compliant
Lead Time: 3–7 business days
Shipping: DHL Express · Worldwide

What are the key features of SF2321D?

SAW bandpass filter with 1090 MHz center frequency for ADS-B and aviation transponder applications
50 Ω matched input and output impedance enabling direct integration with standard RF circuits
Maximum 3 dB insertion loss preserving signal strength in sensitive receiver chains
Compact 1.4 mm height SMD package for space-constrained RF module designs
Tape-and-reel packaging supporting automated SMT high-volume production

What is SF2321D used for?

The Murata SF2321D is designed for RF front-end signal conditioning in ADS-B (Automatic Dependent Surveillance-Broadcast) receivers and Mode S aviation transponders operating at 1090 MHz. It is also suitable for interference rejection in ISM-band wireless modules, drone tracking systems, and test equipment where a low-loss 50 Ω bandpass filter at 1090 MHz is required to suppress out-of-band interferers before the LNA or ADC stage.

What are the specifications of SF2321D?

YTEOL	0
Additional Feature	TAPE AND REEL
Center or Cutoff Frequency (fo/fc)	1090MHz
Filter Type	SAW FILTER
Height	1.4mm
Input Impedance	50OHM
Insertion Loss-Max	3dB
Mounting Type	SURFACE MOUNT
Number of Functions	1
Output Impedance	50 OHM Ω
Package	Other

Compliance & Regulatory

RoHS Status	Compliant
Lead-Free	Yes (Pb-Free)

Where can I find the SF2321D datasheet?

SF2321D Datasheet Download

Official datasheet from Murata Electronics

What are equivalent replacements for SF2321D?

No known alternates. Submit an RFQ and our team can suggest alternatives.

Frequently Asked Questions

What is the center frequency and insertion loss of SF2321D, and how do these specs affect ADS-B receiver sensitivity?

SF2321D is a SAW filter with a 1090 MHz center frequency and a maximum insertion loss of 3 dB. In an ADS-B receiver, the 3 dB insertion loss directly degrades the noise figure of the front end by up to 3 dB, so designers typically follow SF2321D with a low-noise amplifier (LNA) to compensate and maintain adequate receiver sensitivity for detecting aircraft transponder signals.

How does the 50 Ω impedance matching on SF2321D simplify RF PCB layout for aviation transponder designs?

SF2321D features both 50 Ω input and 50 Ω output impedance, which matches the standard characteristic impedance used in most RF transmission lines, antennas, and amplifiers. This 50 Ω matching eliminates the need for external impedance-matching networks between the antenna and the filter, reducing BOM count and simplifying the PCB trace routing in 1090 MHz aviation transponder front-end designs.

For a compact drone tracking module, how does SF2321D's 1.4 mm height profile affect PCB assembly choices?

The 1.4 mm height of SF2321D is low enough to fit under metal RF shielding cans commonly used in drone tracking modules. This compact SMD profile, combined with tape-and-reel packaging, enables automated pick-and-place assembly on high-density RF boards where taller through-hole or leaded filter components would interfere with the shield enclosure or adjacent components.

When should a procurement team qualify a Murata SF2321D replacement, and what electrical parameters must match for a drop-in swap?

Procurement teams should qualify a replacement when SF2321D shows end-of-life risk, indicated by the YTEOL value of 0. A drop-in replacement must match the 1090 MHz center frequency, 50 Ω input and output impedance, maximum 3 dB insertion loss, and the same SMD footprint dimensions at 1.4 mm height. Mismatches in any of these parameters will require RF board redesign and re-verification of receiver selectivity and sensitivity.

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AvailabilityIn Stock

Reference Price (USD)

From $1.1330

Buy from 1pc · Factory-direct pricing

Qty.	Unit Price	Ext. Price
10+	$2.0600	$20.60
500+	$1.1330	$566.50

pcs

Unit price: $2.0600 · Total: $20.60

In Stock · 24h Response · Worldwide Shipping

Direct Contact

WhatsApp Inquiry Email RFQ

Lead Time3-7 business days

MOQFrom 1 piece

ShippingDHL / FedEx / UPS

OriginChina (Authorized)

Response within 24 hours · Worldwide shipping

“Their engineering team helped us find a pin-compatible alternative when our original MCU went EOL.”

Marco Rossi

CTO, AutoDrive Systems, Italy

SF2321D Murata Electronics Filter (Other) In Stock

What are the key features of SF2321D?

What is SF2321D used for?

What are the specifications of SF2321D?

Compliance & Regulatory

Where can I find the SF2321D datasheet?

What are equivalent replacements for SF2321D?

Frequently Asked Questions

What is the center frequency and insertion loss of SF2321D, and how do these specs affect ADS-B receiver sensitivity?

How does the 50 Ω impedance matching on SF2321D simplify RF PCB layout for aviation transponder designs?

For a compact drone tracking module, how does SF2321D's 1.4 mm height profile affect PCB assembly choices?

When should a procurement team qualify a Murata SF2321D replacement, and what electrical parameters must match for a drop-in swap?

Related Guides

STM32H725IGT3 Selection Guide: Memory, Package, Temperature, and Supply

STM32H725IGT3 High-Performance MCU Design Guide

150141VS73100 Violet SMD LED Selection Guide: Color, Drive, and Sourcing

STEF05SGR 5 V eFuse Protection Design Guide

Why Buy from FindMyChip

About Murata Electronics

More from Murata Electronics

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