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PDF BU2615S Data sheet ( Hoja de datos )
| Número de pieza | BU2615S | |
| Descripción | PLL frequency synthesizer for tuners | |
| Fabricantes | ROHM Semiconductor | |
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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 con-
sumption, and highly sensitive built-in RF amps, they support an IF count function.
FApplications
Tuners (Mini components, radio cassette players, radio
equipment, etc.)
FFeatures
1) Built-in high-speed prescaler can divide
130MHzVCO.
2) Basic oscillation of 75kHz keeps unnecessary radi-
ation 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 frequen-
cies.
6) Unlock detection
7) Seven output ports (open drain).
The BU2614, with three output ports, is also avail-
able.
8) Serial data input (CE, CK, DA)
FAbsolute maximum ratings (Ta = 25_C)
FRecommended operating power supply voltage
125
1 page  
Audio ICs
FExplanation of the data
(1) Division data: For D0 through D15 (When S = 1, use D4 through D15.)
BU2615S / BU2615FS
(2) CT: Frequency measurement beginning data
1: Beginning of measurement
0: Internal counter is reset, IFIN is pulldown.
(3) Output port control data: P0, P1, P2, P3, P4, P5, P6
1: Open drain output ON (P5 is LO)
0: Open drain output OFF (P5 is HI)
(4) R0, R1, R2, standard frequency data
(5) S: switch between FMIN and AMIN
0: FMIN 1: AMIN
(6) PS: If this bit is set to ON while AMIN is selected,
swallow counter division is possible.
(7) CH: If this bit set to ON, output port P5 goes to
phase comparison output. 0: P5 1: PD2
(8) GT: Frequency measurement time and unlock
detection ON / OFF
(9) TS: Test data. Input(0).
129
5 Page | ||
| Páginas | Total 9 Páginas | |
| PDF Descargar | [ Datasheet BU2615S.PDF ] | |
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