參數(shù)資料
型號: MAX4549EAX+T
廠商: Maxim Integrated Products
文件頁數(shù): 4/20頁
文件大?。?/td> 0K
描述: IC AUD/VIDCROSSPOINT SWIT 36SSOP
產品培訓模塊: Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標準包裝: 1,000
功能: 音頻/視頻交叉點開關
電路: 3 x 3:2
導通狀態(tài)電阻: 35 歐姆
電壓電源: 單電源
電壓 - 電源,單路/雙路(±): 2.7 V ~ 5.5 V
電流 - 電源: 6µA
工作溫度: -40°C ~ 85°C
安裝類型: 表面貼裝
封裝/外殼: 36-BSOP(0.295",7.50mm 寬)
供應商設備封裝: 36-SSOP
包裝: 帶卷 (TR)
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.
Applications 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.
MAX4548/MAX4549
Serially Controlled, Triple 3x2 Audio/Video
Crosspoint Switches
12
______________________________________________________________________________________
COM2B
C3
COM1B
C2
COM2A
C1
COM1A
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
DESCRIPTION
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
SRT
A7
C0
A0
C7
D15
ACK
D0
D8
D7
STOP
Figure 4. 2-Wire Serial-Interface Timing Diagram (“WriteWord’’)
SCL
SDA
ACK
SRT
ACK
A7
D0
C0
A0
C7
D7
STOP
Figure 3. 2-Wire Serial-Interface Timing Diagram (“WriteByte’’)
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