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BU2618FV 数据表(PDF) 6 Page - Rohm

部件名 BU2618FV
功能描述  PLL frequency synthesizer for tuners
Download  8 Pages
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制造商  ROHM [Rohm]
网页  http://www.rohm.com
标志 ROHM - Rohm

BU2618FV 数据表(HTML) 6 Page - Rohm

  BU2618FV Datasheet HTML 1Page - Rohm BU2618FV Datasheet HTML 2Page - Rohm BU2618FV Datasheet HTML 3Page - Rohm BU2618FV Datasheet HTML 4Page - Rohm BU2618FV Datasheet HTML 5Page - Rohm BU2618FV Datasheet HTML 6Page - Rohm BU2618FV Datasheet HTML 7Page - Rohm BU2618FV Datasheet HTML 8Page - Rohm  
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144
Audio ICs
BU2618FV
S Frequency counter
(1)
Structure
(2)
How the frequency counter operates
When control data CT equals 1, the 20-bit counter
and the amp go into operation. When CT equals 0,
amp input goes to pulldown and the counter is re-
set. Measuring time (gate pulse) is selected
(16ms / 32ms) on the basis of control data GT.
When control data CT equals 0, the counter is reset.
(3)
Explanation of output data
D0: LSB D19: MSB
Unlock detection
When control data GT equals 1, or CT equals 1, the
unlock detection circuit goes into operation for 8 ms.
When CT equals 1, the unlock detection circuits
stops operating before the frequency counter gate
pulse is emitted. When CT equals 0, or GT equals
0, the unlock detection circuit is reset.


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