YQM5050R

SAW Resonators | SMD 5050 Ceramic Single-Port SAW Resonator

Core Advantages

• Superior RF Grounding with 8-Pin Configuration: The SMD 5050 8-pin layout dedicates pins 2 and 6 as signal terminals while the remaining six pads serve as ground/shield connections — delivering exceptionally low ground inductance, excellent inter-port isolation, and rock-solid RF reference plane integrity for clean, stable oscillation.
• Lowest Insertion Loss in Class: The larger 5.0×5.0mm piezoelectric substrate and optimized interdigital transducer (IDT) design yield the lowest insertion loss among common SMD SAW resonator packages — maximizing oscillator loop gain margin, ensuring reliable start-up over temperature extremes, and improving transmitter power efficiency.
• Best-in-Class Frequency Selectivity: High resonator Q and strong anti-resonance rejection provide superior spectral purity — helping transmitter designs meet stringent regulatory emission masks (FCC Part 15.231, ETSI EN 300 220) with minimal external filtering.
• Enhanced Thermal & Mechanical Robustness: The larger package mass and multi-pad anchor distribution provide better thermal dissipation and superior solder-joint reliability under thermal cycling and mechanical vibration — critical for automotive and outdoor industrial installations.
• Highest Cross-Reference Coverage: Mechanically and electrically compatible with the widest range of imported equivalents including RFMi/Akoustis RO31xxC (notably RO3164C), TDK/EPCOS R-series QCC8C, Murata SARCC, and Raltron RSR series — providing maximum supply chain flexibility.

Product Introduction

The YQM5050R is a single-port SAW resonator housed in the industry-standard SMD 5050 ceramic package (5.0×5.0mm, 8-pin, typical thickness ~1.5mm). Engineered for fixed-frequency wireless transmitters and RF local oscillator circuits, this device delivers the highest performance tier in the YQM SAW resonator portfolio — optimized for applications demanding the lowest insertion loss, best frequency stability, and most robust grounding.

The 8-pin package employs a dedicated signal-plus-ground layout: pins 2 and 6 serve as the RF signal terminals (interchangeable in the single-port topology), while the remaining six pads connect to ground and package shielding. This architecture provides six-fold redundant grounding with extremely low parasitic inductance — a critical advantage for maintaining oscillation spectral purity in co-located multi-radio designs where transmitter harmonic leakage can degrade nearby receiver sensitivity.

Operating across the full Sub-1GHz ISM spectrum — 315MHz, 433.92MHz, 868MHz, and 915MHz — the YQM5050R is the go-to choice for high-performance fixed-frequency transmitters in garage door openers, automotive RKE/TPMS, industrial telemetry, and infrastructure-grade wireless sensor networks. Its comprehensive cross-reference compatibility with RFMi RO3164C, TDK/EPCOS QCC8C, Murata SARCC, and Raltron RSR resonators ensures a low-risk migration path from any major international supplier.

Alternative Products and Reasons

• RFMi / Akoustis (USA) — RO31xxC Series (RO3164C): Highest-priority direct replacement. Mechanically identical SM5050-8 package — 5×5mm, 8-pin, single-port structure. Pin-to-pin and footprint compatible; recommended for first-pass validation.
• TDK / EPCOS (Germany) — R Series (B39431R727U310): High-degree package match. Identical QCC8C / 5×5mm / 8-pin SAW resonator format. Pin-to-pin compatible.
• Murata (Japan) — SARCC Series: Functionally and solution-compatible single-port SAW frequency control devices for the same Sub-1GHz ISM frequency bands and oscillator circuit topologies.
• Raltron (USA) — RSR Series: Functionally equivalent SAW resonators for remote control, security alarm, and wireless control transmitter applications at 315/433/868/915MHz.

Replacement Reason: YQM5050R offers verified pin-to-pin compatibility with RFMi RO3164C and TDK/EPCOS QCC8C packages. Customers can achieve immediate drop-in replacement — no PCB layout change, no matching network re-optimization — while benefiting from domestic manufacturing advantages: competitive pricing, faster lead times, and direct factory FAE support.

Key Features

• Package Form: SMD 5050, 8-pin ceramic package. 5.0×5.0mm footprint, typical thickness ~1.5mm. Fully compatible with standard SMT tape-and-reel feeding and automated pick-and-place assembly.
• Single-Port SAW Topology: Optimized for fixed-frequency transmitter carrier generation and superheterodyne receiver local oscillator frequency control. Signal on pins 2 and 6 (interchangeable); pins 1, 3, 4, 5, 7, 8 as ground/shield.
• Low Insertion Loss & High Selectivity: Industry-leading low resonant loss ensures ample oscillator start-up margin. High Q and strong anti-resonance suppression deliver spectrally clean output — minimizing harmonic content and easing regulatory compliance.
• Fundamental-Mode Stability: Direct SAW fundamental-frequency oscillation eliminates the drift, spurs, and complexity associated with LC tanks and crystal multiplier chains. Reduced sensitivity to external component variation improves production consistency.
• Wide Temperature Range: Standard products rated for -40°C to +85°C continuous operation, meeting the requirements of outdoor, industrial, and automotive cabin environments.
• SMT Manufacturing Compatible: Lead-free, RoHS and REACH compliant. Designed for standard lead-free reflow soldering profiles. Tape-and-reel packaging for high-volume automated assembly.
• Domestic Supply Advantage: Factory-direct technical support, rapid sample delivery, competitive pricing, and stable long-term availability — ideal for transitioning from imported RFMi, TDK, Murata, and Raltron SAW resonators.

Applications

• Wireless Remote Controls: Garage door openers, rolling shutter controllers, electric gate remotes, wireless push-button switches, and toy-grade RF remote controls (315/433MHz).
• Access Control & Smart Locks: Wireless building access key fobs, door magnetic contact sensors, smart lock RF modules, and visitor entry control systems.
• Security & Alarm Systems: Wireless PIR infrared detectors, smoke/heat alarms, emergency panic buttons, glass-break sensors, and anti-theft alarm panel transmitter front-ends.
• Smart Home: Wireless curtain motors, smart lighting controllers, smart plugs, environmental sensors (temperature/humidity/air quality), and gateway peripheral RF modules.
• Industrial IoT: Wireless utility meter reading (AMR/AMI for water, gas, electricity), industrial remote telemetry transmitters, low-speed wireless data links, and wireless sensor network nodes.
• Fixed-Frequency RF Modules: ASK, OOK, and FSK transmitter modules; superheterodyne receiver local oscillator reference circuits for 315/433.92/868/915MHz ISM-band products.

Certifications

RoHS, REACH compliant. Manufactured under ISO 9001 certified quality management system with full batch traceability.

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