參數(shù)資料
型號(hào)： KSZ8841-16MQL
廠(chǎng)商： Micrel Inc
文件頁(yè)數(shù)： 28/105頁(yè)
文件大?。?/td> 0K
描述： IC MAC CTRLR 8/16BIT 128-PQFP
標(biāo)準(zhǔn)包裝： 66
控制器類(lèi)型： 以太網(wǎng)控制器，MAC
接口： 總線(xiàn)
電源電壓： 3.1 V ~ 3.5 V
工作溫度： 0°C ~ 70°C
安裝類(lèi)型： 表面貼裝
封裝/外殼： 128-BFQFP
供應(yīng)商設(shè)備封裝： 128-PQFP（14x20）
包裝： 托盤(pán)
產(chǎn)品目錄頁(yè)面： 1080 (CN2011-ZH PDF)
配用： 576-1631-ND - BOARD EVALUATION KSZ8841-16MQL
其它名稱(chēng)： 576-2112
KSZ8841-16MQL-ND
Micrel, Inc.
KSZ8841-16/32 MQL/MVL/MBL
October 2007
29
M9999-102207-1.6
100BASE-TX Receive
The 100BASE-TX receiver function performs adaptive equalization, DC restoration, MLT3-to-NRZI conversion, data and
clock recovery, NRZI-to-NRZ conversion, de-scrambling, 4B/5B decoding, and serial-to-parallel conversion.
The receiving side starts with the equalization filter to compensate for inter-symbol interference (ISI) over the twisted pair
cable. Since the amplitude loss and phase distortion is a function of the cable length, the equalizer has to adjust its
characteristics to optimize performance. In this design, the variable equalizer makes an initial estimation based on
comparisons of incoming signal strength against some known cable characteristics, and then tunes itself for optimization.
This is an ongoing process and self-adjusts against environmental changes such as temperature variations.
Next, the equalized signal goes through a DC restoration and data conversion block. The DC restoration circuit is used to
compensate for the effect of baseline wander and to improve the dynamic range. The differential data conversion circuit
converts the MLT3 format back to NRZI. The slicing threshold is also adaptive.
The clock recovery circuit extracts the 125MHz clock from the edges of the NRZI signal. This recovered clock is then used
to convert the NRZI signal into the NRZ format. This signal is sent through the de-scrambler followed by the 4B/5B
decoder. Finally, the NRZ serial data is converted to an MII format and provided as the input data to the MAC.
PLL Clock Synthesizer (Recovery)
The internal PLL clock synthesizer generates 125MHz, 62.5MHz, 41.66MHz, and 25MHz clocks by setting the on-chip
bus speed control register for KSZ8841M system timing. These internal clocks are generated from an external 25Mhz
crystal or oscillator.
Scrambler/De-scrambler (100BASE-TX Only)
The purpose of the scrambler is to spread the power spectrum of the signal to reduce electromagnetic interference (EMI)
and baseline wander.
Transmitted data is scrambled through the use of an 11-bit wide linear feedback shift register (LFSR). The scrambler
generates a 2047-bit non-repetitive sequence. Then the receiver de-scrambles the incoming data stream using the same
sequence as at the transmitter.
10BASE-T Transmit
The 10BASE-T driver is incorporated with the 100BASE-TX driver to allow for transmission using the same magnetics.
They are internally wave-shaped and pre-emphasized into outputs with a typical 2.4V amplitude. The harmonic contents
are at least 27dB below the fundamental frequency when driven by an all-ones Manchester-encoded signal.
10BASE-T Receive
On the receive side, input buffers and level detecting squelch circuits are employed. A differential input receiver circuit and
a phase-locked loop (PLL) perform the decoding function.
The Manchester-encoded data stream is separated into clock signal and NRZ data. A squelch circuit rejects signals with
levels less than 400mV or with short pulse widths to prevent noise at the RXP-or-RXM input from falsely triggering the
decoder. When the input exceeds the squelch limit, the PLL locks onto the incoming signal and the KSZ8841M decodes a
data frame.
The receiver clock is maintained active during idle periods in between data reception.
MDI/MDI-X Auto Crossover
To eliminate the need for crossover cables between similar devices, the KSZ8841M supports HP-Auto MDI/MDI-X and
IEEE 802.3u standard MDI/MDI-X auto crossover. HP-Auto MDI/MDI-X is the default.
The auto-sense function detects remote transmit and receive pairs and correctly assigns the transmit and receive pairs for
the KSZ8841M device. This feature is extremely useful when end users are unaware of cable types in addition to saving
on an additional uplink configuration connection. The auto-crossover feature can be disabled through the port control
registers.
相關(guān)PDF資料
PDF描述
PIC12CE518-04E/SM IC MCU OTP 512X12 W/EE 8-SOIC
KSZ8895RQ IC 10/100-T 5 PORT SW 128PQFP
PIC16LC620A-04/P IC MCU OTP 512X14 COMP 18DIP
KSZ8863FLLI IC ETHERNET SWITCH 3PORT 48-LQFP
PIC16C505-04E/SL IC MCU OTP 1KX12 14SOIC
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
KSZ8841-16MQL A6 功能描述:IC MAC CTRLR 8/16BIT 128-PQFP RoHS:是 類(lèi)別:集成電路 (IC) >> 接口 - 控制器 系列:- 標(biāo)準(zhǔn)包裝:4,900 系列:- 控制器類(lèi)型:USB 2.0 控制器 接口:串行 電源電壓:3 V ~ 3.6 V 電流 - 電源:135mA 工作溫度:0°C ~ 70°C 安裝類(lèi)型:表面貼裝 封裝/外殼:36-VFQFN 裸露焊盤(pán) 供應(yīng)商設(shè)備封裝:36-QFN（6x6） 包裝:* 其它名稱(chēng):Q6396337A
KSZ8841-16MQL-EVAL 功能描述:以太網(wǎng)開(kāi)發(fā)工具 KSZ8841-16MQL Evaluation Board RoHS:否 制造商:Micrel 產(chǎn)品:Evaluation Boards 類(lèi)型:Ethernet Transceivers 工具用于評(píng)估:KSZ8873RLL 接口類(lèi)型:RMII 工作電源電壓:
KSZ8841-16MVL 功能描述:以太網(wǎng) IC Single Ethernet Port + Generic (8, 16-bit) bus interface(Lead Free) RoHS:否 制造商:Micrel 產(chǎn)品:Ethernet Switches 收發(fā)器數(shù)量:2 數(shù)據(jù)速率:10 Mb/s, 100 Mb/s 電源電壓-最大:1.25 V, 3.45 V 電源電壓-最小:1.15 V, 3.15 V 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-64 封裝:Tray
KSZ8841-16MVL TR 功能描述:以太網(wǎng) IC Single Ethernet Port + Generic (8, 16-bit) bus interface(Lead Free) RoHS:否 制造商:Micrel 產(chǎn)品:Ethernet Switches 收發(fā)器數(shù)量:2 數(shù)據(jù)速率:10 Mb/s, 100 Mb/s 電源電壓-最大:1.25 V, 3.45 V 電源電壓-最小:1.15 V, 3.15 V 最大工作溫度:+ 85 C 封裝 / 箱體:QFN-64 封裝:Tray
KSZ8841-16MVL-EVAL 功能描述:BOARD EVALUATION KSZ8841-16MVL RoHS:是 類(lèi)別:編程器，開(kāi)發(fā)系統(tǒng) >> 過(guò)時(shí)/停產(chǎn)零件編號(hào) 系列:- 標(biāo)準(zhǔn)包裝:1 系列:- 類(lèi)型:MCU 適用于相關(guān)產(chǎn)品:Freescale MC68HC908LJ/LK（80-QFP ZIF 插口） 所含物品:面板、纜線(xiàn)、軟件、數(shù)據(jù)表和用戶(hù)手冊(cè) 其它名稱(chēng):520-1035
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。

采購(gòu)需求

(若只采購(gòu)一條型號(hào)，填寫(xiě)一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

發(fā)布成功！您可以繼續(xù)發(fā)布采購(gòu)。也可以進(jìn)入我的后臺(tái)，查看報(bào)價(jià)

*型號(hào) *數(shù)量 廠(chǎng)商 批號(hào) 封裝
添加更多采購(gòu)

我的聯(lián)系方式

*
*
*