YQM3838R

SAW Resonators | SMD 3838 Ceramic Single-Port SAW Resonator

Core Advantages

• Balanced SMD 3838 Form Factor: The 3.8×3.8mm 6-pin ceramic package strikes an optimal balance between PCB space efficiency and RF layout flexibility. The larger cavity volume compared to 3030/3225 packages provides superior power handling, lower thermal resistance, and improved long-term frequency stability.
• Enhanced Anti-Interference Performance: The robust 6-pin pad configuration with dedicated ground pins delivers excellent RF grounding, reduced parasitic coupling, and superior EMI/EMC immunity — critical for co-located radio designs where transmitter and receiver modules operate in close proximity.
• Fundamental-Mode Oscillation: Direct fundamental-frequency resonance at 315MHz, 433.92MHz, 868MHz, and 915MHz eliminates the need for crystal overtone multiplication or PLL up-conversion — simplifying the transmitter BOM, reducing spurious emissions, and shrinking PCB area.
• Automotive-Grade Reliability Path: SMD 3838 platform supports operation across -40°C to +85°C (extended-grade options available). Suitable for under-hood and in-cabin automotive wireless applications including RKE, TPMS, and vehicle security systems.
• Wide Cross-Reference Compatibility: Pin-to-pin and footprint compatible with YIC SM446 series, Murata SARCC, and TDK/EPCOS R-series SMD 3838 SAW resonators — enabling drop-in replacement without PCB layout changes.

Product Introduction

The YQM3838R is a single-port SAW resonator in the widely-adopted SMD 3838 ceramic SMD package (3.8×3.8mm, 6-pin). It uses piezoelectric surface acoustic wave resonance to generate a stable, fundamental-frequency oscillation reference — serving as the frequency-control element in fixed-frequency wireless transmitters and superheterodyne receiver local oscillator stages operating in the Sub-1GHz ISM bands.

Compared to traditional LC oscillator solutions, the YQM3838R delivers fundamentally better frequency accuracy and reduced temperature sensitivity. The SAW resonance mechanism eliminates the troublesome frequency drift commonly caused by inductor aging, capacitor temperature coefficients, and parasitic PCB effects in LC tanks. This translates to tighter production frequency distribution, fewer field returns, and simplified end-of-line calibration.

The YQM3838R is engineered as a direct domestic alternative to leading imported SAW resonators. Its 3.8×3.8mm 6P footprint is mechanically and electrically compatible with YIC SM446, Murata SARCC, and TDK/EPCOS R-series devices in the same package — enabling customers to diversify their BOM and secure supply without PCB redesign or requalification. Local FAE support and fast sample delivery further accelerate the evaluation and adoption cycle.

Alternative Products and Reasons

• YIC (Taiwan) — SM446 Series: High-degree package match. Mechanically identical 3.8×3.8mm, 6-pin footprint with overlapping ISM frequency band coverage — recommended as the first-priority direct drop-in replacement candidate for validation.
• Murata (Japan) — SARCC Series: Functionally and solution-compatible single-port SAW frequency control devices covering the same Sub-1GHz oscillator applications. Same operating principle; circuit topology remains unchanged.
• TDK / EPCOS (Germany) — R Series: Functionally equivalent SAW resonators for remote control carrier generation, receiver local oscillator, and general RF frequency-control systems at 315/433/868/915MHz ISM bands.

Replacement Reason: YQM3838R offers verified pin-to-pin compatibility with the YIC SM446 series and functional equivalence with Murata SARCC and TDK/EPCOS R-series resonators. Local IDM manufacturing ensures competitive pricing, shorter lead times, and responsive factory-direct technical support.

Key Features

• Package Form: SMD 3838 — 3.8×3.8mm ceramic package, 6-pin pad configuration. Optimized footprint balancing compactness with excellent RF grounding and solder joint reliability for SMT mass production.
• Single-Port SAW Topology: Designed for use as a fixed-frequency oscillator element — typically as the transmitter carrier frequency reference or superheterodyne receiver local oscillator. Simple external circuit enables fast design-in.
• Fundamental Frequency Stability: Direct SAW-based resonance at the target frequency (hundreds of MHz range) avoids the complexity, spurs, and PCB area penalty associated with crystal overtone multiplication or PLL up-conversion schemes.
• Low Insertion Loss & High Q: Low resonant loss ensures sufficient oscillator loop gain margin for reliable start-up. High resonator Q and strong out-of-band rejection contribute to stable, spectrally clean oscillation.
• Temperature Range: Standard products rated for -40°C to +85°C continuous operation. Extended temperature grades available for specific application requirements.
• SMT Production Ready: Ceramic SMD package fully compatible with tape-and-reel feeding, automated pick-and-place, and standard lead-free reflow soldering. RoHS and REACH compliant.
• Domestic Supply Chain: Factory-direct technical support, fast inquiry-to-sample turnaround, cost optimization, and stable long-term supply — accelerating the transition from imported SAW resonators to a secure domestic source.

Applications

• Wireless Remote Controls: Garage door openers, rolling shutter remotes, electric gate controllers, door access key fobs, smart locks, and wireless push-button switches.
• Security & Alarm Systems: Wireless PIR infrared detectors, smoke/heat sensors, emergency panic buttons, door/window contact sensors, and anti-theft alarm host transmitter front-ends.
• Smart Home: Curtain motors, smart sockets, lighting control modules, wireless sensor nodes, and remote control modules for home automation gateways.
• Automotive Electronics: Remote Keyless Entry (RKE) key fobs, Passive Keyless Entry (PKE) systems, TPMS tire pressure monitoring transmitters, and vehicle security/immobilizer RF links.
• Industrial Wireless: Wireless utility meter reading (water/gas/electricity), industrial remote telemetry, wireless sensor transmitters, and low-speed data links for factory automation.
• Consumer Electronics: Toy-grade remote controls, simple wireless control terminals, and low-cost RF transmitter modules for hobbyist and educational applications.

Certifications

RoHS, REACH compliant. Manufactured under ISO 9001 certified quality management system. AEC-Q200 qualification pathway available for automotive-grade requirements.

Related Products

Explore our complete SAW Resonators collection:

→ View All SAW Resonators

Get YQM3838R Samples & Technical Solutions

Click the button below to contact customer service for selection