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參數(shù)資料
| 型號(hào)： | MAX459 |
| 廠商： | MAXIM INTEGRATED PRODUCTS INC |
| 元件分類： | 運(yùn)動(dòng)控制電子 |
| 英文描述： | 8x4 Video Crosspoint Switches with Buffers(8*4,90MHz,帶AV=2V/V輸出緩沖器,交叉視頻開關(guān)矩陣) |
| 中文描述： | 8-CHANNEL, CROSS POINT SWITCH |
| 文件頁數(shù)： | 14/16頁 |
| 文件大?。?/td> | 185K |
| 代理商： | MAX459 |
M
Driving Capac itive Loads
When driving loads greater than 100pF, you may need
a capacitance compensating resistor in series with the
output of each affected amplifier. The required resistor
will depend on load as well as capacitance. For 150
or higher load resistances and capacitance up to
1000pF, use a 2.4
resistor. For 100
loads, use a
4.7
resistor.
If an output amplifier is loaded with a pure capacitance
or with the inputs of other MAX458/MAX459s, the resis-
tors will cause no degradation of gain or other perfor-
mance because of the high impedance of the
crosspoints. However, resistive loads may cause a
reduction in gain.
Daisy-Chaining Devic es
The serial output, DOUT, allows cascading of two or
more crosspoint switches to create larger arrays. The
data at DOUT is the DIN data delayed by 16 cycles
plus one clock width. DOUT changes on SCLK’s falling
in the state of the last data bit.
Any number of MAX458/MAX459 crosspoint switches
can be daisy-chained by connecting the DOUT of one
device to the DIN of the next device in the chain, as
sho (C—low to SCLK high) and t
t
CSS
CL
are greater than
t
DO
+ t
DS
.
DOUT is a TTL-compatible output with an active pull-
high.
8x4 Video Crosspoint S witc hes with Buffers
14
______________________________________________________________________________________
MAX458
MAX459
MAX458
MAX459
CS
SCLK
DOUT
DIN
DOUT
SERIAL
DATA
INPUT
1
20
40
39
28
30
32
34
1
20
40
39
28
30
32
34
OUT3
OUT2
OUT1
OUT0
Figure 12. 16x4 Crosspoint Switch Using Serial "Daisy Chain"
Connection
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