參數(shù)資料
型號(hào): BT848A
英文描述: Single-Chip Video Capture for PCI
中文描述: 單芯片的PCI視頻捕捉
文件頁數(shù): 71/141頁
文件大小: 1149K
代理商: BT848A
Brooktree
61
E
LECTRICAL
I
NTERFACES
Input Interface
L848A_A
Bt848/848A/849A
Single-Chip Video Capture for PCI
Crystals are specified as follows:
28.636363 MHz or 35.468950 MHz
Third overtone
Parallel resonant
30 pF load capacitance
50 ppm
Series resistance 40
or less
The following crystals are recommended for use with the Bt848:
1
Standard Crystal
(818) 443-2121
2BAK28M636363GLE30A
2BAK35M468950GLE30A
2
MMD
(714) 444-1402
A30AA3-28.63636 MHz
A30AA3-35.46895 MHz
3
GED
(619) 591-4170
PKHC49-28.63636-.030-005-40R, 3rd overtone crystal
PKHC49-35.46895-.030-005-40R, 3rd overtone crystal
4
M-Tron
(800) 762-8800
MP-1 28.63636, 3rd overtone crystal
MP-1 35.46895, 3rd overtone crystal
5
Monitor
(619) 433-4510
MM49X3C3A-28.63636, 3rd overtone crystal
MM49X3C3A-35.46895, 3rd overtone crystal
6
CTS
(815) 786-8411
R3B55A30-28.63636, 3rd overtone crystal
R3B55A30-35.46895, 3rd overtone crystal
7
Fox
(813) 693-0099
HC49U-28.63636, 3rd overtone crystal
HC49U-35.46895, 3rd overtone crystal
The two clock sources may be configured with either single-ended oscillators,
fundamental cut crystals or third overtone mode crystals, parallel resonant. If sin-
gle-ended oscillators are used they must be connected to XT0I and XT1I. The
clock source options and circuit requirements are shown in Figure 26.
The clock source tolerance should be 50 parts-per-million (ppm) or less. Devic-
es that output CMOS voltage levels are required. The load capacitance in the crys-
tal configurations may vary depending on the magnitude of board parasitic
capacitance. The Bt848 is dynamic, and, to ensure proper operation, the clocks
must always be running, with a minimum frequency of 28.636363 MHz.
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