HMD904D

Overview

The HMD904D is a low-pass filter designed for 2.4GHz Wireless LAN and Bluetooth applications, manufactured by Soshin Electric Co., Ltd. It features a center frequency of 2.495GHz with a bandwidth of 390MHz. The component exhibits a ripple of 0.3dB and an insertion loss of 0.5dB. It provides attenuation of 30dB at frequencies ranging from 4600-5380 MHz and 6900 MHz. Packaged in a compact 0603 (1608 Metric) surface-mount format, it supports active product status.

Feature Summary

• Low-pass filter architecture optimized for 2.4GHz ISM band operations
• High attenuation performance exceeding 30dB in upper stopbands
• Compact 0603 surface-mount package design for space-constrained PCBs

Applications

• Wireless LAN modules operating in the 2.4GHz spectrum
• Bluetooth device integration requiring harmonic suppression
• Automotive advanced driver assistance systems (ADAS)
• Industrial building automation controllers
• Enterprise wireless communication systems

Procurement Notes

Verify the specific ordering suffix when purchasing, as variations such as HMD904D-01-T may exist within the product line. Confirm that the required packaging type, whether tape and reel or cut tape, aligns with your assembly equipment capabilities. Ensure the component status remains active to guarantee long-term supply availability for production runs.

Selection Notes

Select this component when designing circuits requiring precise low-pass filtering for 2.4GHz wireless standards. The 0.5dB insertion loss indicates efficient signal transmission in the passband. Consider the 0603 footprint constraints during layout planning. Verify compatibility with the target application's frequency range against the specified 390MHz bandwidth.

Part Context

This component belongs to the HMD series of RF filters produced by Soshin Electric Co., Ltd. The series includes various models tailored for different frequency bands and attenuation requirements. The HMD904D specifically targets the 2.4GHz band, distinguishing itself from other series members like the HMD6108F which serves different spectral needs.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation. Evaluate alternative low-pass filters from the same manufacturer only if they match the 0603 package and 2.4GHz center frequency specifications exactly.