sm5309a Nippon Precision Circuits Inc, (NPC), sm5309a Datasheet - Page 13

• Manufacturer Part Number: sm5309a
• Description: 3-channel Video Buffer With Built-in Wideband Lpf
• Manufacturer: Nippon Precision Circuits Inc, (NPC)

Flag settings
(1) Cutoff frequency
(2) Input type switching (sync-tip clamp, bias, direct)
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.
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.
*1. An input coupling capacitor should not be connected when direct input is selected.
FCDATA
125
126
127
128
129
130
253
254
255
0
1
2
Channel
CH-1
CH-2
CH-3
FCSET
7Dh
7Eh
FDh
FEh
FFh
00h
01h
02h
7Fh
80h
81h
82h
FCM
0
0
0
0
0
0
1
1
1
1
1
1
CB5
CB3
CB1
FC6
H
0
0
0
1
1
1
0
0
0
1
1
1
L
L
FC5
Flag name
0
0
0
1
1
1
0
0
0
1
1
1
SM5309A
FC4
Flag name
0
0
0
1
1
1
0
0
0
1
1
1
:
:
Don't care
CB4
CB2
CB0
FC3
H
0
0
0
1
1
1
0
0
0
1
1
1
L
FC2
0
0
0
1
1
1
0
0
0
1
1
1
FC1
0
0
1
0
1
1
0
0
1
0
1
1
Sync-tip clamp input
Direct input
SEIKO NPC CORPORATION —13
Input type
FC0
Bias input
0
1
0
1
0
1
0
1
0
1
0
1
frequency
*1
Cutoff
[MHz]
21.66
21.79
21.92
39.46
39.72
40.00
4.00
4.18
4.35
7.51
7.82
8.11
Default
Default