ROHM BU2614FS, BU2614 Datasheet

Audio ICs

PLL frequency synthesizer for tuners

BU2614 / BU2614FS

The BU2614 PLL frequency synthesizers work up through the FM band. Featuring low radiation noise, low power dis­sipation, 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) Reference 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) Three output ports (open drain).
The BU2615, with seven output ports, is also avail­able.

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

Absolute maximum ratings (Ta = 25C)

Recommended operating conditions (Ta = 25C)

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Audio ICs BU2614 / BU2614FS

Block diagram

Pin assignments

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Audio ICs BU2614 / BU2614FS

Pin descriptions

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