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SM5309B Datasheet(PDF) 13 Page - Nippon Precision Circuits Inc

Part No. SM5309B
Description  3-channel Video Buffer with Built-in wideband LPF
Download  24 Pages
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Maker  NPC [Nippon Precision Circuits Inc]
Homepage  http://www.npc.co.jp/en
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SM5309B Datasheet(HTML) 13 Page - Nippon Precision Circuits Inc

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SM5309B
SEIKO NPC CORPORATION —13
Flag settings
(1) Cutoff frequency
Register name: FCSET
Flag names: FCM, FC [6:0]
The FCSET register setting sets the cutoff frequency using one of two tuning adjustment functions, thus a
total of 256 steps are possible.
(2) Input type switching (sync-tip clamp, bias, direct)
Register name: CONDITION1
Flag names: CB [5:4], CB [3:2], CB [1:0]
These flags set the input type of CH-1, CH-2, and CH-3 to one of three types: sync-tip clamp input, bias
input, or direct input.
FCDATA
FCSET
Flag name
Cutoff
frequency
[MHz]
Default
FCM
FC6
FC5
FC4
FC3
FC2
FC1
FC0
0
00h
00000000
4.05
1
01h
00000001
4.22
2
02h
00000010
4.38
:
125
7Dh
01111101
22.46
126
7Eh
01111110
22.60
127
7Fh
01111111
22.74
128
80h
10000000
7.40
129
81h
10000001
7.70
130
82h
10000010
7.99
:
253
FDh
11111101
40.10
254
FEh
11111110
40.35
255
FFh
11111111
40.60
Channel
Flag name
Input type
Default
CH-1
CH-2
CH-3
CB5
CB3
CB1
CB4
CB2
CB0
L
L
Sync-tip clamp input
L
H
Bias input
H
Don't care
Direct input*1
*1. An input coupling capacitor should not be connected when direct input is selected.


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