KDS/Daishinku has developed a smaller size 4-pole monolithic crystal filter specially designed for use in smaller radio communication devices.
Their new 4-pole MCF DSF633SDF is just 6.0×3.5mm, whereas the majority of others available on the market are 7.0×5.0mm.
Not only does this offer a price advantage and better insertion loss, but also more possibilities to customize these filters into your devices. Smaller also means more freedom to design your PCB layout.