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| 型号： | MAX7428EKA+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 3/21页 |
| 文件大小： | 0K |
| 描述： | IC FILTER BUFFER VID SOT23-8 |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 类型： | 视频滤波器 |
| 应用： | 录音机，机顶盒 |
| 安装类型： | 表面贴装 |
| 封装/外壳： | SOT-23-8 |
| 供应商设备封装： | SOT-23-8 |
| 包装： | 带卷 (TR) |
MAX7428/MAX7430/MAX7432A
Standard Definition Video Reconstruction
Filters and Buffers
______________________________________________________________________________________
11
Applications Information
Maxim’s Single Pin Bus (MSPB)
Serial Interface
The MSPB interface uses three pulses of different
widths to represent commands and data bits. Figure 4
shows the set of pulses that the single pin interface
uses to communicate with the device. A combination of
the one pulse (t1), zero pulse (t0), transaction pulse (tT),
and prompt pulse (tP), writes to, reads back from, and
sends broadcast data to the devices on the bus.
Note: The zero pulse and prompt pulse are the same.
Initialization pulses are significantly longer and are
used only on power-up or software reset.
Initializing the
MAX7428/MAX7430/MAX7432A
Initialization is performed only after power-up or software
reset. It assigns a unique address to each device on the
bus. The time constant of the capacitor connected to
REXT in parallel with the 300k
Ω resistor determines the
order in which the devices are initialized (address
assigned). The device with the largest time constant is
initialized first and so on, in descending order. Table 7
shows the “Initialize Wait” and “Initialize Time” pulse
widths needed for a specific capacitor value and toler-
ance. Program each device on the bus with this com-
mand sequence starting with the device with the biggest
capacitor. To reinitialize a device, cycle the power or use
a software reset. The following is the command
sequence and timing diagram (Figure 5) for initialization
as shown below. Chip ID is entered LSB first.
Note: If there is only one device on the bus, no initial-
ization is needed. Communicate to the device using the
broadcast command described on page 13.
(MSB)
NAME
—
ABSEL3
BYPASS3
CLEVEL3
BOOST1(3)
BOOST0(3)
OUT
DISABLE3
—
DEFAULT
0
1
0
NAME
—
ABSEL2
BYPASS2
CLEVEL2
BOOST1(2)
BOOST0(2)
OUT
DISABLE2
—
DEFAULT
0
1
0
NAME
—
ABSEL1
BYPASS1
CLEVEL1
BOOST1(1)
BOOST0(1)
OUT
DISABLE1
—
DEFAULT
0
1
0
FIRST BIT
(LSB)
Table 5. MAX7432A Control Register
BOOST1_
BOOST0_
RELATIVE HIGH
FREQUENCY BOOST
00
0
1
0.3dB to 0.5dB
1
0
0.6dB to 1.0dB
1
0.9dB to 1.5dB
Table 6. Boost Level Programming
ZERO/PROMPT
PULSE
tP = t0 = 5
μs
t1 = 30
μs
t0
ONE PULSE
TRANSACTION
PULSE
t1
tT = 100
μs
tT
Figure 4. MSPB Interface Pulses
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相关代理商/技术参数 |
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| MAX7428EVC16 | 功能描述:有源滤波器 Programmers, Development Systems RoHS:否 制造商:Maxim Integrated 通道数量:1 截止频率:150 KHz 电源电压-最大:11 V 电源电压-最小:4.74 V 最大工作温度:+ 85 C 安装风格:Through Hole 封装 / 箱体:PDIP N 封装:Tube |
| MAX7428EVKIT | 功能描述:有源滤波器 Programmers, Development Systems RoHS:否 制造商:Maxim Integrated 通道数量:1 截止频率:150 KHz 电源电压-最大:11 V 电源电压-最小:4.74 V 最大工作温度:+ 85 C 安装风格:Through Hole 封装 / 箱体:PDIP N 封装:Tube |
| MAX742C/D | 功能描述:直流/直流开关调节器 RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
| MAX742C/D DIE | 制造商:Maxim Integrated Products 功能描述: |
| MAX742CPP | 功能描述:直流/直流开关调节器 Switch-Mode Regulator RoHS:否 制造商:International Rectifier 最大输入电压:21 V 开关频率:1.5 MHz 输出电压:0.5 V to 0.86 V 输出电流:4 A 输出端数量: 最大工作温度: 安装风格:SMD/SMT 封装 / 箱体:PQFN 4 x 5 |
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