ROHM BU2615S, BU2615FS Datasheet

Audio ICs

PLL frequency synthesizer for tuners

BU2615S / BU2615FS

The BU2615 PLL frequency synthesizers work up through the FM band. Featuring low radiation noise, low power con­sumption, and highly sensitive built-in RF amps, they support an IF count function.

Applications
Tuners (Mini components, radio cassette players, radio
equipment, etc.)

Features

1) Built-in high-speed prescaler can divide
130MHzVCO.

2) Basic oscillation of 75kHz keeps unnecessary radi­ation noise to a low level.

3) Low current dissipation (during operation: 4mA, PLL
OFF: 100µA)

4) In addition to the standard FM and AM, also offers the
following 7 frequencies: 25kHz, 12.5kHz, 6.25kHz,

3.125kHz, 5kHz, 3kHz, and 1kHz.

5) Counter for measurement of intermediate frequen­cies.

6) Unlock detection

7) Seven output ports (open drain).
The BU2614, with three output ports, is also avail­able.

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

Absolute maximum ratings (Ta = 25C)

Recommended operating power supply voltage

125

Audio ICs BU2615S / BU2615FS

Block diagram

Pin assignments

126

Audio ICs BU2615S / BU2615FS

Pin descriptions

127