161

Audio ICs

PLL frequency synthesizer for tuners

BU2624AF

The BU2624AF is a PLL frequency synthesizer IC designed for use in car stereos, high-fidelity audio systems, and CD

radio cassettes.

Featuring low current dissipation, low superfluous radiation, two frequency measurement counter systems, and two

phase comparison outputs, this chip is ideal for high-performance multi-band systems.

FApplications

Car stereos, high-fidelity audio systems, radio cassettes,

receivers, and other frequency generating devices

FFeatures

1) Built-in

high-speed

prescaler

can

divide

130MHzVCO.

2) Low current dissipation (during operation: 6.0mA,

PLL OFF: 300

µA Typ.)

3) Seven standard frequencies: 50kHz, 25kHz,

12.5kHz, 10kHz, 9kHz, 5kHz, and 1kHz.

4) Two counters for intermediate frequency detection

5) Unlock detection circuit

6) Five output ports (open drain)

7) SD input port

8) Two charge pump outputs

9) Serial data input (CE, CK, DA)

10) Control of phase comparison output

FAbsolute maximum ratings (Ta = 25_C)

FRecommended operating conditions (Ta = 25_C)