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BU2630

Dual PLL frequency synthesizer

ROHM Semiconductor 

Communication ICs

Dual PLL frequency synthesizer

BU2630F / BU2630FV

The BU2630F / BU2630FV are a CMOS LSI with an internal dual PLL synthesizer.

VCOs for transmission and reception can be controlled independently, and the reference frequency and main counter

settings can also be programmed separately. This product is designed for applications involving cordless telephones

and communications equipment worldwide.

FApplications

Cordless telephones, amateur short wave radios, industrial transceivers, VHF / UHF frequency generators, and others

FFeatures

1) Operation possible at up to 80MHz (VDD = 2.5).

2) Low current dissipation

Dual-system operation : 2.2mA (typ), VDD = 3V

Single-system operation : 1.2mA (typ), VDD = 3V

Non-operating state : 0.2mA (typ), VDD = 3V

3) 16-bit main counter.

4) Internal 14-bit reference frequency counter.

5) Unlock detection possible.

6) Four output ports. (open drain)

7) Control possible using 3-wire serial input.

FBlock diagram

91

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