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參數(shù)資料
| 型號(hào)： | MAX4357ECD+TD |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 26/42頁 |
| 文件大小： | 0K |
| 描述： | IC VIDEO CROSSPOINT SWIT 128TQFP |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 250 |
| 功能： | 視頻交叉點(diǎn)開關(guān) |
| 電路： | 1 x 32:16 |
| 電壓電源： | 單/雙電源 |
| 電壓 - 電源，單路/雙路(±)： | 5V，± 3 V ~ 5 V |
| 工作溫度： | -40°C ~ 85°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 128-LQFP |
| 供應(yīng)商設(shè)備封裝： | 128-LQFP（14x20） |
| 包裝： | 帶卷 (TR) |
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MAX4357
32 x 16 Nonblocking Video Crosspoint Switch
with I/O Buffers
32
______________________________________________________________________________________
driven externally, the analog output buffers are latched
into a high-impedance state. After RESET is released,
the output buffers remain disabled. The outputs may be
enabled by sending a new 112-bit data word or a 16-bit
individual output address word. A reset is initiated from
any of three sources. RESET can be driven low by
external circuitry to initiate a reset, or RESET can be
pulled low by internal circuitry during power-up (power-
on reset) or thermal shutdown.
Since driving RESET low only clears the output-buffer-
enable bit in the matrix control latches, RESET can be
used to disable all outputs simultaneously. If no new
data has been loaded into the 112-bit Complete Matrix
Mode register, a single UPDATE restores the previous
matrix control settings.
Power-On Reset
The power-on reset ensures all output buffers are in a
disabled state when power is initially applied. A VDD
voltage comparator generates the power-on reset.
When the voltage at VDD is less than 2.5V, the power-
on-reset comparator pulls RESET low via internal cir-
cuitry. As the digital-supply voltage ramps up crossing
2.5V, the MAX4357 holds RESET low for 40ns (typ).
Connecting a small capacitor from RESET to DGND
extends the power-on-reset delay. (see the RESET
Delay vs. RESET Capacitance graph in the
Typical
Operating Characteristics).
Thermal Shutdown
The MAX4357 features thermal shutdown protection
with temperature hysteresis. When the die temperature
exceeds 150°C, the MAX4357 pulls RESET low, dis-
abling the output buffer. When the die cools by 20°C,
the RESET pulldown is deasserted, and output buffers
remain disabled until the device is programmed again.
Applications Information
Building Large Video-Switching Systems
The MAX4357 can be easily used to create larger
switching matrices. The number of ICs required to
implement the matrix is a function of the number of
input channels, the number of outputs required, and
whether the array needs to be nonblocking.
The most straightforward technique for implementing
nonblocking matrices is to arrange the building blocks
in a grid. The inputs connect to each vertical bank of
devices in parallel with the other banks. The outputs of
each building block in a vertical column connect
together in a wired-OR configuration. Figure 6 shows a
128-input, 32-output, nonblocking array using eight
MAX4357 crosspoint devices.
Table 2. 16-Bit Serial Control Word Bit Assignments (Mode 0: Individual Output
Address Mode)
BIT
NAME
FUNCTION
15 (MSB)
X
Don’t care
14
IC Address A3
MSB of selected chip address
13
IC Address A2
MSB of selected chip address
12
IC Address A1
MSB of selected chip address
11
IC Address A0
LSB of selected chip address
10
Output Address B3
MSB of output buffer address
9
Output Address B2
MSB of output buffer address
8
Output Address B1
MSB of output buffer address
7
Output Address B0
LSB of output buffer address
6
Output Enable
Enable bit for output, 0 = disable, 1 = enable
5
Gain Set
Gain select for output buffer, 0 = gain of +1V/V, 1 = gain of +2V/V
4
Input Address 4
MSB of input channel select address
3
Input Address 3
MSB of input channel select address
2
Input Address 2
MSB of input channel select address
1
Input Address 1
MSB of input channel select address
0 (LSB)
Input Address 0
LSB of input channel select address
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX4358ECE | 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 |
| MAX4358ECE+ | 功能描述:視頻開關(guān) IC 32x16 Nonblocking Video Crx 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 |
| MAX4358ECE+D | 功能描述:視頻開關(guān) IC 32x16 Nonblocking Video Crx 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 |
| MAX4358ECE+T | 功能描述:視頻開關(guān) IC 32x16 Nonblocking Video Crx 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 |
| MAX4358ECE+TD | 功能描述:視頻開關(guān) IC 32x16 Nonblocking Video Crx 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 |
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