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| 型号： | MAX459CQH-D |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 3/17页 |
| 文件大小： | 0K |
| 描述： | IC VIDEO CROSSPOINT SWIT 44PLCC |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 28 |
| 功能： | 视频交叉点开关 |
| 电路： | 1 x 8:4 |
| 工作温度： | 0°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 44-LCC（J 形引线） |
| 供应商设备封装： | 44-PLCC（16.59x16.59） |
| 包装： | 管件 |
MAX458/MAX459
8x4 Video Crosspoint Switches with Buffers
10
______________________________________________________________________________________
to their switch registers. As long as either
–
W
—
R
–
or
–
C
—
E
–
is
high, the input register will not change. The switch reg-
ister will pass any new data on the falling transition of
–
U
—
P
—
D
—
A
—
T
—
E
–
.
Each register of the switch-register bank controls the
inputs to one amplifier. With
–
U
—
P
—
D
—
A
—
T
—
E
–
low, the switch
registers are transparent and switch connection is con-
trolled by the input register. However, if
–
U
—
P
—
D
—
A
—
T
—
E
–
is
high, the switch register is latched and any change in
data by the input register will not affect the amplifier
output state. Two register banks are used so that data
can be loaded into input registers without affecting the
switch/amplifier selection. This allows amplifiers to be
programmed and then changed simultaneously. When
the registers are not latched, they are made transparent.
Use data bit D3 to disable the amplifier selected by
A0–A1 and place its output in high-impedance mode.
As an example, the code to disable OUT0 is as follows:
Pin Name: D3 D2 D1 D0 A1 A0
Input Code: 1 X
X
0
When operating in parallel mode, C
—
S
–
must be wired high
and SCLK and DIN should be grounded, as shown in
Figure 3. Refer to Figure 4 for the correct timing rela-
tionships.
Digital Section—Serial Mode
The MAX458/MAX459 use a three-wire serial interface
that is compatible with SPI, QPSI and Microwire inter-
faces. Serial mode, shown in Figure 5, is enabled
when
–
W
—
R
–
,
–
U
—
P
—
D
—
A
—
T
—
E
–
, and
–
C
—
E
–
are held high and
–
C
—
S
–
goes
low. Figures 6 and 7 show serial-mode timing. Figure 8
shows the MAX458/MAX459 configured for serial oper-
ation. Figure 9 shows the Microwire connection, and
Figure 10 shows the SPI/QSPI connection.
The serial output, DOUT, allows cascading of two or
more crosspoint switches to create larger arrays. The
data at DOUT is delayed by 16 cycles plus one clock
pulse width at DIN. DOUT changes on SCLK’s falling
edge when
–
C
—
S
–
is low. When
–
C
—
S
–
is high, DOUT remains
in the state of the last data bit.
The MAX458/MAX459 input data in 16-bit blocks. SPI
and Microwire interfaces output data in 8-bit blocks,
thereby requiring two write cycles to input data. The
QSPI interface allows variable word lengths from 8 to 16
bits and can be loaded into the crosspoint in one write
cycle. SPI and Microwire limit clock rates to 2MHz, while
the QSPI maximum clock rate is 4MHz.
ADDRESS VALID
A0/A1
CE
WR
UPDATE
tADS
tCES
tWR
tCEH
tDS
tADH
DATA VALID
D0–D3
tDH
tWRS
tUP
tUPS
Figure 4. Parallel-Mode Timing
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX459CQH-DW | 功能描述:模拟和数字交叉点 IC RoHS:否 制造商:Micrel 配置:2 x 2 封装 / 箱体:MLF-16 数据速率:10.7 Gbps 输入电平:CML, LVDS, LVPECL 输出电平:CML 电源电压-最大:3.6 V 电源电压-最小:2.375 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 产品:Digital Crosspoint 封装:Tube |
| MAX459CQH-DW-T | 功能描述:模拟和数字交叉点 IC RoHS:否 制造商:Micrel 配置:2 x 2 封装 / 箱体:MLF-16 数据速率:10.7 Gbps 输入电平:CML, LVDS, LVPECL 输出电平:CML 电源电压-最大:3.6 V 电源电压-最小:2.375 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 产品:Digital Crosspoint 封装:Tube |
| MAX459CQH-TD | 功能描述:视频开关 IC RoHS:否 制造商:Texas Instruments 开关数量:4 开启电阻（最大值）:12 Ohms 传播延迟时间: 开启时间（最大值）: 关闭时间（最大值）: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:WQFN-42 封装:Reel |
| MAX459EPL | 功能描述:视频开关 IC RoHS:否 制造商:Texas Instruments 开关数量:4 开启电阻（最大值）:12 Ohms 传播延迟时间: 开启时间（最大值）: 关闭时间（最大值）: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:WQFN-42 封装:Reel |
| MAX459EVKIT-PLC | 制造商:Rochester Electronics LLC 功能描述: 制造商:Maxim Integrated Products 功能描述: |
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