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参数资料
| 型号： | MAX9257GTL+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 31/52页 |
| 文件大小： | 0K |
| 描述： | IC SER/DESER PROG 40-TQFN |
| 其它有关文件： | Automotive Product Guide |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 功能： | 串行器/解串器 |
| 数据速率： | 840Mbps |
| 输入类型： | 串行 |
| 输出类型： | LVDS |
| 输入数： | 16 |
| 输出数： | 1 |
| 电源电压： | 3 V ~ 3.6 V |
| 工作温度： | -40°C ~ 105°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 40-WFQFN 裸露焊盘 |
| 供应商设备封装： | 40-TQFN-EP（5x5） |
| 包装： | 带卷 (TR) |
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MAX9257/MAX9258
______________________________________________________________________________________
37
Fully Programmable Serializer/Deserializer
with UART/I2C Control Channel
PARAMETER
SYMBOL
MIN
TYP
MAX
UNIT
SCL Clock Frequency
fSCL
11
tUCLK*
Start Condition Hold Time
tHD:STA
11
tUCLK
Low Period of SCL Clock
tLOW
0.5
tUCLK
High Period of SCL Clock
tHIGH
0.5
tUCLK
Repeated START Condition
Setup Time
tSU:STA
0.25
tUCLK
Data Hold Time
tHD:DAT
0.25
tUCLK
Data Setup Time
tSU:DAT
0.25
tUCLK
Setup Time for STOP Condition
tSU:STO
0.25
tUCLK
Bus Free Time
tBUF
0.5
tUCLK
Table 31. Timing Information for I2C Data Rates Greater than 400kbps
*
tUCLK is equal to one UART period.
I2C
The MAX9257 features a UART-to-I2C converter that
converts UART packets to I2C. The UART-to-I2C con-
verter works as a repeater between the ECU and exter-
nal I2C slave devices. The MAX9257 acts as the master
and converts UART read/write packets from the ECU to
I2C read/write for external I2C slave devices. For writes,
the UART-to-I2C converts the UART packets received
directly into I2C. For reads, the UART-to-I2C converter
follows the UART packet protocol. The I2C SCL clock
period is approximately the same as the UART bit clock
period (tUCLK). The I2C speed varies with UART speed.
I2C reads from the peripheral device do not disable the
ETO timer. Choose ETO large enough so that I2C read
commands are not lost due to ETO timing out.
I2C Timing
The MAX9257 acts like a master in I2C communication
with the peripheral device. The MAX9257 takes less
than 22 UART bit times to convert UART packets into
I2C. The SCL and SDA timings are based on the UART
bit clock. The I2C data rate is determined by UART and
can range from 95kbps to 4.25Mbps. The I2C timing
requirements scale linearly from fast mode to higher
speeds. Table 31 shows the I2C timing information for
data rates greater than 400kbps. The I2C parameters
scale with tUCLK. See Figure 30 for timing parameters.
Applications Information
PRBS Test
The MAX9257/MAX9258 have built-in circuits for testing
bit errors on the serial link. The MAX9257 has a PRBS
generator and the MAX9258 has a PRBS checker. The
length of the PRBS pattern is programmable from 221 to
235 word length or continuous by programming
REG9[7:4] in the MAX9257. In case of errors, errors are
counted in the MAX9258 PRBSERR register (REG12),
and the
ERROR output on the MAX9258 goes low. To
start the test, the ECU writes a 1 to PRBSEN bit of both
the MAX9257 and the MAX9258. The PRBS test can be
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX9258 | 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 |
| MAX9258A | 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 |
| MAX9258AEVKIT# | 功能描述:界面开发工具 MAX9257A/58A Eval Kit RoHS:否 制造商:Bourns 产品:Evaluation Boards 类型:RS-485 工具用于评估:ADM3485E 接口类型:RS-485 工作电源电压:3.3 V |
| MAX9258AGCM | 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 |
| MAX9258AGCM/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 |
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