BU2618FV

Audio ICs PLL frequency synthesizer for tuners BU2618FV The BU2618FV is a low current dissipation PLL frequency synthesizer designed for use in FM multiplex radio receiver and FM pager receiver. Featuring very small package and built-in prescaler that can operate at up to 130MHz. FApplications FM multiplex radio receivers, pagers, radios, and other signal generators FFeatures 1) Built-in high-speed prescaler can divide 130 MHzVCO. 2) Low current dissipation (during operation: 1.5mA, PLL OFF: 200µA Typ.) 3) Seven standard frequencies: 25kHz, 12.5kHz, 6.25kHz, 10kHz, 9kHz, 5kHz, and 1kHz. 4) 5) 6) 7) Counter for intermediate frequency detection. Unlock detection circuit. Four output ports. Serial data input (CE, CK, DA) FAbsolute maximum ratings (Ta = 25_C) FRecommended operating conditions (Ta = 25_C) 139 Audio ICs FBlock diagram BU2618FV FPin descriptions 140 Audio ICs FElectrical characteristics (unless otherwise noted, Ta = 25_C, VDD = 3.0V) BU2618FV 141 Audio ICs FCircuit operation BU2618FV 142 Audio ICs S Explanation of the data (1) Division data: For D0 through D15 (When S = 0, use D4 through D15.) BU2618FV (2) (3) (4) CT: Frequency measurement beginning data 1: Begins measurement. 0: Resets internal counter, IFIN goes to pulldown. Output port control data: 1: Open drain output ON 2: Open drain output OFF R0, R1, R2, standard frequency data (5) (6) (7) S: switch between FMIN and AMIN 0: FMIN 1: AMIN PS: If this bit is set to ON while AMIN is sel...