參數(shù)資料
型號: MAX4548EAX
廠商: MAXIM INTEGRATED PRODUCTS INC
元件分類: 運(yùn)動控制電子
英文描述: Serially Controlled, Triple 3x2 Audio/Video Crosspoint Switches
中文描述: 3-CHANNEL, CROSS POINT SWITCH, PDSO36
封裝: 0.300 INCH, 0.80 MM PITCH, SSOP-36
文件頁數(shù): 12/20頁
文件大?。?/td> 273K
代理商: MAX4548EAX
Audio off-isolation is -85dB at 20kHz, crosstalk is
-85dB at 20kHz, and video off-isolation is -62dB at
10MHz. The SA, SB, and SC (shunt) inputs further
improve off-isolation, allowing for the addition of exter-
nal shunt capacitors to connect the outputs to AC
grounds. When using the bias resistors, MID_ inputs
improve crosstalk by providing an AC ground at the
common bias points. Resistance from the bias points to
the inputs allows AC signals to pass through the device
and improve crosstalk performance (refer to the
Functional Diagram. These devices feature a clickless
operation mode for noiseless audio switching. Use the
serial interface to select the clickless or standard-
switching mode for each individual output.
Applic ations Information
The MAX4548/MAX4549 are divided into five functional
blocks: the control-logic block, three switch-matrix
blocks, and the bias-resistor block (see Functional
Diagram. The control-logic block accepts commands
through the serial interface and uses those commands
to control the four remaining blocks.
M
S erially Controlled, Triple 3x2 Audio/Video
Crosspoint S witc hes
12
______________________________________________________________________________________
COM2B
COM1B
COM2A
COM1A
C3
C2
C1
C0
COM1C
C4
COM2C
C5
BIT
Bias
C6
Clickless Mode
C7
REGISTER
Table 1. Command-Byte Format
Controls the switch connected to S_;
1 = close switch, 0 = open switch.
Controls the switch connected to NO3_;
1 = close switch, 0 = open switch.
Controls the switch connected to NO2_;
1 = close switch, 0 = open switch.
Controls the switch connected to NO1_;
1 = close switch, 0 = open switch.
Don’t care
Don’t care
DESCRIPTION
Don’t care
Don’t care
1
D3
0
D2
0
D1
0
D0
D4
D5
BIT
D6
D7
POWER-UP
DEFAULT
STATE
Table 2. COM Data-Byte Format
(C0, C1, C2, C3, C4, C5 = “1”)
SCL
SDA
ACK
ACK
SRT
A7
C0
A0
C7
D15
ACK
ACK
D0
D8
D7
STOP
Figure 4. 2-Wire Serial-Interface Timing Diagram (“WriteWord’’)
SCL
SDA
ACK
ACK
SRT
ACK
A7
D0
C0
A0
C7
D7
STOP
Figure 3. 2-Wire Serial-Interface Timing Diagram (“WriteByte’’)
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