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| 型号： | MAX9257AGCM/V+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 38/53页 |
| 文件大小： | 0K |
| 描述： | IC SERDE PROG UART/I2C 48TQFP |
| 标准包装： | 250 |
| 系列： | * |
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Maxim Integrated Products 43
MAX9257A/MAX9258A
Fully Programmable Serializer/Deserializer
with UART/I2C Control Channel
Cables and Connectors
Interconnect for LVDS typically has a differential imped-
ance of 100I. Use cables and connectors that have
matched differential impedance to minimize impedance
discontinuities. Twisted-pair and shielded twisted-pair
cables offer superior signal quality compared to ribbon
cable and tend to generate less EMI due to magnetic
field canceling effects. Balanced cables pick up noise
as common mode that is rejected by the LVDS receiver.
Choosing I2C Pullup Resistors
I2C requires pullup resistors to provide a logic-high level
to data and clock lines. There are tradeoffs between
power dissipation and speed, and a compromise must
be made in choosing pullup resistor values. Every device
connected to the bus introduces some capacitance even
when device is not in operation. I2C specifies 300ns
rise times to go from low to high (30% to 70%) for fast
mode, which is defined for a date rate up to 400kbps
(see I2C specifications for details). To meet the rise time
requirement, choose the pullup resistors so the rise time
tR = 0.85RPULLUP x CBUS < 300ns. If the transition time
becomes too slow, the setup and hold times may not be
met and waveforms will not be recognized.
MAX9257A Register Table
ADDRESS
BITS
DEFAULT
NAME
DESCRIPTION
0
7:6
10
PRATE
Pixel clock frequency range
00 = 5MHz to 10MHz
01 = 10MHz to 20MHz
10 = 20MHz to 40MHz (default)
11 = 40MHz to 70MHz
5:4
11
SRATE
Serial-data rate range
00 = 60Mbps to 100Mbps
01 = 100Mbps to 200Mbps
10 = 200Mbps to 400Mbps
11 = 400Mbps to 840Mbps (default)
3
0
PAREN
Parity enable
0 = disabled (default), 1 = enabled
2:0
101
PWIDTH
Parallel data width
(includes HSYNC and VSYNC, excludes DCB, INV, and parity bits)
000 = 10
100 = 18
001 = 12
101 = 18 (default)
010 = 14
110 = 18
011 = 16
111 = 18
1
7:5
000
SPREAD
Spread-spectrum setting
For PRATE ranges 00, 01: all spread options possible
For PRATE ranges 10, 11: maximum spread is 2%
000 = Off (default)
100 = Off
001 = 1.5%
101 = 3%
010 = 1.75%
110 = 3.5%
011 = 2%
111 = 4%
4:0
11111
Reserved (set to 11111)
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX9257AGCV | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Fully Programmable Serializer/Deserializer with UART/I2C Control Channel |
| MAX9257AGTL | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Fully Programmable Serializer/Deserializer with UART/I2C Control Channel |
| MAX9257AGTL/V+ | 功能描述:串行器/解串器 - Serdes Prog Serializer / Deserializer RoHS:否 制造商:Texas Instruments 类型:Deserializer 数据速率:1.485 Gbit/s 输入类型:ECL/LVDS 输出类型:LVCMOS 输入端数量:1 输出端数量:20 工作电源电压:2.375 V to 2.625 V 工作温度范围:0 C to + 70 C 封装 / 箱体:TQFP-64 |
| MAX9257AGTL/V+T | 功能描述:串行器/解串器 - Serdes Prog Serializer / Deserializer RoHS:否 制造商:Texas Instruments 类型:Deserializer 数据速率:1.485 Gbit/s 输入类型:ECL/LVDS 输出类型:LVCMOS 输入端数量:1 输出端数量:20 工作电源电压:2.375 V to 2.625 V 工作温度范围:0 C to + 70 C 封装 / 箱体:TQFP-64 |
| MAX9257AGTL+ | 功能描述:串行器/解串器 - Serdes Prog Serializer / Deserializer RoHS:否 制造商:Texas Instruments 类型:Deserializer 数据速率:1.485 Gbit/s 输入类型:ECL/LVDS 输出类型:LVCMOS 输入端数量:1 输出端数量:20 工作电源电压:2.375 V to 2.625 V 工作温度范围:0 C to + 70 C 封装 / 箱体:TQFP-64 |
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