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.
Applications
Car stereos, high-fidelity audio systems, radio cassettes,
receivers, and other frequency generating devices
Features
1) Built-in high-speed prescaler can divide
130MHzVCO.
2) Low current dissipation (during operation: 6.0mA,
PLL OFF: 300µA 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
Absolute maximum ratings (Ta = 25 C)
Recommended operating conditions (Ta = 25 C)