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| 型號(hào)： | MAX4570EAI+ |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 2/16頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC CROSSPOINT SWITCH DUAL 28SSOP |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 46 |
| 功能： | 交叉點(diǎn)開關(guān) |
| 電路： | 2 x 4:2 |
| 導(dǎo)通狀態(tài)電阻： | 80 歐姆 |
| 電壓電源： | 雙電源 |
| 電壓 - 電源，單路/雙路(±)： | ±2.7 V ~ 5.5 V |
| 電流 - 電源： | 7µA |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 28-SSOP（0.209"，5.30mm 寬） |
| 供應(yīng)商設(shè)備封裝： | 28-SSOP |
| 包裝： | 管件 |
MAX4550/MAX4570
Serially Controlled, Dual 4x2, Clickless
Audio/Video Analog Crosspoint Switches
10
______________________________________________________________________________________
Detailed Description
The MAX4550/MAX4570 are serial-interface, program-
mable, dual 4x2 audio/video crosspoint switches. Each
device contains two independent 4x2 crosspoint
switches, controlled through the on-chip serial inter-
face. The MAX4550 uses a 2-wire I2C-compatible serial
communications protocol, while the MAX4570 uses a
3-wire SPI/QSPI/MICROWIRE-compatible serial com-
munications protocol.
These ICs include four controllable auxiliary outputs,
each capable of sourcing 1mA or sinking 12mA. Also
included are four selectable bias-resistor networks (one
for each output) for use with AC-coupled input signals.
Both devices operate with either ±5V dual supplies or a
single +5V supply, and are optimized for use in the
audio frequency range to 20kHz and at video frequen-
cies up to 4MHz. They feature 80
on-resistance, 10
on-resistance matching between channels, 5
on-
resistance flatness, and as low as 0.004% total harmon-
ic distortion.
The MAX4550/MAX4570 offer better than -110dB of
audio off-isolation, -95dB of audio crosstalk, -78dB of
video off-isolation, and -54dB of video crosstalk
(4MHz). The SA and SB (shunt) inputs further improve
off-isolation, allowing for the addition of external shunt
capacitors or the connection of outputs to AC grounds.
These devices feature a clickless operation mode for
noiseless audio switching. Clickless or standard switch-
ing mode is selectable for each individual output using
the serial interface.
__________ Applications Information
The MAX4550/MAX4570 are divided into five functional
blocks: the control-logic block, two switch-matrix
blocks, the bias-resistor block, and the auxiliary-output
block (see
Functional Diagram). The control-logic block
accepts commands via the serial interface and uses
those commands to control the four remaining blocks.
Command-Byte and Data-Byte
Programming
The devices are programmed through their serial inter-
face with a command byte followed by a data byte.
Each bit of the command byte selects one of the func-
tional blocks to be controlled by the subsequent data
byte. The data byte sets the state of the selected
block(s). For the two switch-matrix blocks, the data
byte sets the switch state. For the bias-resistor block,
the data byte controls which bias network is active. For
the auxiliary-output block, the data byte programs the
state of the four auxiliary outputs (see
Functional
Diagram).
A logic “1” in any bit position of the data byte makes
that function active, while a logic “0” makes it inactive.
Tables 1–4 describe the command byte and the corre-
sponding data byte. For example, if bit C4 of the com-
mand byte is set, the subsequent data byte programs
the state of the auxiliary outputs. If bits D0 and D2 of
the subsequent data byte are set, Q0 and Q2 outputs
are set high. If more than one bit of the command byte
is set, the data byte programs all of the corresponding
blocks. This operation is useful, for instance, to simulta-
neously set both switch matrices to the same configura-
tion. Any block that is not selected in the command
byte remains unchanged.
Don’t care
C7
Don’t care
C6
BIT
REGISTER
BIAS/MODE
C5
AUX
C4
COM2A
COM2B
C3
C1
COM1A
C0
COM1B
C2
Don’t care
D7
D5
Controls the switch connected to S_ ;
1 = close switch, 0 = open switch.
D4
Controls the switch connected to NO2_ ;
1 = close switch, 0 = open switch.
Don’t care
D6
Controls the switch connected to NO4_ ;
1 = close switch, 0 = open switch.
D3
D1
Controls the switch connected to NO1_ ;
1 = close switch, 0 = open switch.
DESCRIPTION
D0
Controls the switch connected to NO3_ ;
1 = close switch, 0 = open switch.
D2
BIT
Table 2. COM Data-Byte Format
(C0, C1, C2, C3 = “1”)
Table 1. Command-Byte Format
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參數(shù)描述 |
|---|---|
| MAX4570EAI+ | 功能描述:視頻開關(guān) IC 4x2 Clickless A/V Crosspoint Switch RoHS:否 制造商:Texas Instruments 開關(guān)數(shù)量:4 開啟電阻（最大值）:12 Ohms 傳播延遲時(shí)間: 開啟時(shí)間（最大值）: 關(guān)閉時(shí)間（最大值）: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:WQFN-42 封裝:Reel |
| MAX4570EAI+T | 功能描述:視頻開關(guān) IC 4x2 Clickless A/V Crosspoint Switch RoHS:否 制造商:Texas Instruments 開關(guān)數(shù)量:4 開啟電阻（最大值）:12 Ohms 傳播延遲時(shí)間: 開啟時(shí)間（最大值）: 關(guān)閉時(shí)間（最大值）: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:WQFN-42 封裝:Reel |
| MAX4570EAI-T | 功能描述:視頻開關(guān) IC RoHS:否 制造商:Texas Instruments 開關(guān)數(shù)量:4 開啟電阻（最大值）:12 Ohms 傳播延遲時(shí)間: 開啟時(shí)間（最大值）: 關(guān)閉時(shí)間（最大值）: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:WQFN-42 封裝:Reel |
| MAX4570EEI | 功能描述:視頻開關(guān) IC RoHS:否 制造商:Texas Instruments 開關(guān)數(shù)量:4 開啟電阻（最大值）:12 Ohms 傳播延遲時(shí)間: 開啟時(shí)間（最大值）: 關(guān)閉時(shí)間（最大值）: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:WQFN-42 封裝:Reel |
| MAX4570EWI | 功能描述:視頻開關(guān) IC RoHS:否 制造商:Texas Instruments 開關(guān)數(shù)量:4 開啟電阻（最大值）:12 Ohms 傳播延遲時(shí)間: 開啟時(shí)間（最大值）: 關(guān)閉時(shí)間（最大值）: 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:WQFN-42 封裝:Reel |
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