Monolithic crystal filter MQF21.4-1800/08 Application • 6 pol filter • i.f.- filter • use in mobile and stationary transceivers Characterstics Pass band Unit Value Alternate attenuation Group delay (absolute) MHz dB kHz dB dB dB dB µs 21.4 ≤ 4.0 ± 9.00 ≤ Gaussian ≥ 60 > 70 > 70 < 60 Terminating impedance Z R1 || C1 R2 || C2 Ohm/pF Ohm/pF 50 || 0 50 || 0 Operating temp. range °C -20... +70 Limiting values Center frequency Insertion loss Pass band at 3.0 dB Ripple in pass band Stop band attenuation fo fo ± 9.00 kHz fo ± 40 kHz fo ± 50 kHz MQF21.4-1800/08 Stop band Pin connections: 1 2 3 4 Input Input-E Output Output-E TELE FILTER Zweigniederlassung der DOVER EUROPE GMBH 30.10.00 Potsdamer Str. 18 D- 14513 Teltow ! (+49)03328-4784-10 ; Fax (+49)03328-4784-30 http:\\www.telefilter.com