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: 300µA Typ.)
3) Seven standard frequencies: 50kHz, 25kHz,
12.5kHz, 10kHz, 9kHz, 5kHz, and 1kHz.
4) Two counters for intermediate frequency detection
FAbsolute
maximum ratings (Ta = 25_C)
5)
6)
7)
8)
9)
10)
Unlock detection circuit
Five output ports (open drain)
SD input port
Two charge pump outputs
Serial data input (CE, CK, DA)
Control of phase comparison output
FRecommended
operating conditions (Ta = 25_C)
161
ROHM [ ROHM ]
