21.4MHz and 45MHz monolithic crystal filters ACF21U and ACF45U series are used in mobile communication systems, pagers, cellular and cordless phones, radios, etc.
The ACF21U and ACF45U series are monolithic crystal filters designed for mobile communication systems, pagers, cellular and cordless phones, and radios. They offer excellent attenuation bandwidth and a compact design.
The datasheet lists detailed specifications for each filter variant, including center frequency, channel spacing, impedance, and package type. Contact information for Abracon is provided for further inquiries.
| Center Frequency (ACF21U) | 21.4 MHz |
|---|---|
| Center Frequency (ACF45U) | 45 MHz |
| Channel Spacing (8 Series) | 12.5 kHz |
| Channel Spacing (12 Series) | 20 kHz |
| Channel Spacing (15 Series) | 25 kHz |
| Channel Spacing (30 Series) | 50 kHz |
The 12‑series filters have a channel spacing of 20 kHz.