參數(shù)資料
型號(hào)： MAX9257GCM+T
廠商： Maxim Integrated Products
文件頁數(shù)： 32/52頁
文件大?。?/td> 0K
描述： IC SER/DESER PROG 48-LQFP
其它有關(guān)文件： Automotive Product Guide
產(chǎn)品培訓(xùn)模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標(biāo)準(zhǔn)包裝： 2,000
功能： 串行器/解串器
數(shù)據(jù)速率： 840Mbps
輸入類型： 串行
輸出類型： LVDS
輸入數(shù)： 16
輸出數(shù)： 1
電源電壓： 3 V ~ 3.6 V
工作溫度： -40°C ~ 105°C
安裝類型： 表面貼裝
封裝/外殼： 48-LQFP
供應(yīng)商設(shè)備封裝： 48-LQFP（7x7）
包裝： 帶卷 (TR)
MAX9257/MAX9258
38
______________________________________________________________________________________
Fully Programmable Serializer/Deserializer
with UART/I2C Control Channel
performed with or without spread spectrum. If the PRBS
test is programmed to run continuously, the MAX9257
must be powered down to stop the test. When pro-
grammed for a finite number of repetitions, the control
channel is enabled after the PRBS test finishes and
serialization enable (SEREN) is reset to 0. To start nor-
mal operation, the ECU must disable PRBSEN and
enable SEREN.
Video Data Parity
Parity protection of video data is programmable for par-
allel-word widths of 16 bits or less. When programmed,
two parity bits are appended to each parallel word
latched into the MAX9257. In the MAX9258, a 16-bit
parity error counter logs parity errors. The
ERROR out-
put on the MAX9258 goes low if parity errors exceed a
programmable threshold.
AC-Coupling Benefits
AC-coupling increases the input voltage of the LVDS
receiver to the voltage rating of the capacitor. Two
capacitors are sufficient for isolation, but four capaci-
tors—two at the serializer output and two at the deseri-
alizer input—provide protection if either end of the
cable is shorted to a high voltage. AC-coupling blocks
low-frequency ground shifts and common-mode noise.
Selection of AC-Coupling Capacitors
See Figure 31 for calculating the capacitor values for
AC-coupling depending on the parallel clock frequency.
The plot shows minimum capacitor values for two- and
four-capacitor-per-link systems. To block the highest
common-mode frequency shift, choose the minimum
capacitor value shown in Figure 31. In general, 0.1F
capacitors are sufficient.
Optimally Choosing AC-Coupling Capacitors
Voltage droop and the digital sum variaton (DSV) of trans-
mitted symbols cause signal transitions to start from dif-
ferent voltage levels. Because the transition time is finite,
starting the signal transition from different voltage levels
causes timing jitter. The time constant for an AC-coupled
link needs to be chosen to reduce droop and jitter to an
acceptable level. The RC network for an AC-coupled link
consists of the LVDS receiver termination resistor (RTR),
AC-COUPLING CAPACITOR VALUE
vs. SERIAL-DATA RATE
SERIAL-DATA RATE (Mbps)
CAPACITOR
VALUE
(nF)
780
720
660
600
540
480
420
20
40
60
0
360
840
FOUR CAPACITORS PER LINK
TWO CAPACITORS PER LINK
Figure 31. AC-Coupling Capacitor Values vs. Clock Frequency
from 18MHz to 42MHz
P
tBUF
tR
tHD;STA
P
S
tHD;STA
tLOW
tHD;DAT
tHIGH
tF
tSU;DAT
tSU;STA
tSU;STO
SCL
SDA
Figure 30. I2C Timing Parameters
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
MAX9257GTL/V+ 功能描述:串行器/解串器 - Serdes Prog Serializer / Deserializer RoHS:否 制造商:Texas Instruments 類型:Deserializer 數(shù)據(jù)速率:1.485 Gbit/s 輸入類型:ECL/LVDS 輸出類型:LVCMOS 輸入端數(shù)量:1 輸出端數(shù)量:20 工作電源電壓:2.375 V to 2.625 V 工作溫度范圍:0 C to + 70 C 封裝 / 箱體:TQFP-64
MAX9257GTL/V+T 功能描述:串行器/解串器 - Serdes Prog Serializer / Deserializer RoHS:否 制造商:Texas Instruments 類型:Deserializer 數(shù)據(jù)速率:1.485 Gbit/s 輸入類型:ECL/LVDS 輸出類型:LVCMOS 輸入端數(shù)量:1 輸出端數(shù)量:20 工作電源電壓:2.375 V to 2.625 V 工作溫度范圍:0 C to + 70 C 封裝 / 箱體:TQFP-64
MAX9257GTL+ 功能描述:串行器/解串器 - Serdes Prog Serializer / Deserializer RoHS:否 制造商:Texas Instruments 類型:Deserializer 數(shù)據(jù)速率:1.485 Gbit/s 輸入類型:ECL/LVDS 輸出類型:LVCMOS 輸入端數(shù)量:1 輸出端數(shù)量:20 工作電源電壓:2.375 V to 2.625 V 工作溫度范圍:0 C to + 70 C 封裝 / 箱體:TQFP-64
MAX9257GTL+T 功能描述:串行器/解串器 - Serdes Prog Serializer / Deserializer RoHS:否 制造商:Texas Instruments 類型:Deserializer 數(shù)據(jù)速率:1.485 Gbit/s 輸入類型:ECL/LVDS 輸出類型:LVCMOS 輸入端數(shù)量:1 輸出端數(shù)量:20 工作電源電壓:2.375 V to 2.625 V 工作溫度范圍:0 C to + 70 C 封裝 / 箱體:TQFP-64
MAX9258 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Fully Programmable Serializer/Deserializer with UART/I2C Control Channel
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