參數(shù)資料
型號(hào)： KSZ8051MLL TR
廠商： Micrel Inc
文件頁(yè)數(shù)： 23/48頁(yè)
文件大?。?/td> 0K
描述： TXRX PHY 10/T100 3.3V MII 48LQFP
標(biāo)準(zhǔn)包裝： 1,000
類型： PHY 收發(fā)器
驅(qū)動(dòng)器/接收器數(shù)： 1/1
規(guī)程： MII
電源電壓： 1.8V，2.5V，3.3V
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)
配用： 576-3864-ND - BOARD EVALUATION FOR KSZ8051MLL
MCP413X/415X/423X/425X
DS22060B-page 32
2008 Microchip Technology Inc.
3.1
Chip Select (CS)
The CS pin is the serial interface’s chip select input.
Forcing the CS pin to VIL enables the serial commands.
Forcing the CS pin to VIHH enables the high-voltage
serial commands.
3.2
Serial Data In (SDI)
The SDI pin is the serial interfaces Serial Data In pin.
This pin is connected to the Host Controllers SDO pin.
3.3
Serial Data In / Serial Data Out
(SDI/SDO)
On the MCP41X1 devices, pin-out limitations do not
allow for individual SDI and SDO pins. On these
devices, the SDI and SDO pins are multiplexed.
The MCP41X1 serial interface knows when the pin
needs to change from being an input (SDI) to being an
output (SDO). The Host Controller’s SDO pin must be
properly protected from a drive conflict.
3.4
Ground (VSS)
The VSS pin is the device ground reference.
3.5
Potentiometer Terminal B
The terminal B pin is connected to the internal
potentiometer’s terminal B.
The potentiometer’s terminal B is the fixed connection
to the Zero Scale wiper value of the digital
potentiometer. This corresponds to a wiper value of
0x00 for both 7-bit and 8-bit devices.
The terminal B pin does not have a polarity relative to
the terminal W or A pins. The terminal B pin can
support both positive and negative current. The voltage
on terminal B must be between VSS and VDD.
MCP42XX devices have two terminal B pins, one for
each resistor network.
3.6
Potentiometer Wiper (W) Terminal
The terminal W pin is connected to the internal
potentiometer’s terminal W (the wiper). The wiper
terminal is the adjustable terminal of the digital
potentiometer. The terminal W pin does not have a
polarity relative to terminals A or B pins. The terminal
W pin can support both positive and negative current.
The voltage on terminal W must be between VSS and
VDD.
MCP42XX devices have two terminal W pins, one for
each resistor network.
3.7
Potentiometer Terminal A
The terminal A pin is available on the MCP4XX1
devices,
and
is
connected
to
the
internal
potentiometer’s terminal A.
The potentiometer’s terminal A is the fixed connection
to the Full-Scale wiper value of the digital
potentiometer. This corresponds to a wiper value of
0x100 for 8-bit devices or 0x80 for 7-bit devices.
The terminal A pin does not have a polarity relative to
the terminal W or B pins. The terminal A pin can
support both positive and negative current. The voltage
on terminal A must be between VSS and VDD.
The terminal A pin is not available on the MCP4XX2
devices, and the internally terminal A signal is floating.
MCP42X1 devices have two terminal A pins, one for
each resistor network.
3.8
Shutdown (SHDN)
The SHDN pin is used to force the resistor network
terminals into the hardware shutdown state.
3.9
Serial Data Out (SDO)
The SDO pin is the serial interfaces Serial Data Out pin.
This pin is connected to the Host Controllers SDI pin.
This pin allows the Host Controller to read the digital
potentiometers registers, or monitor the state of the
command error bit.
3.10
Positive Power Supply Input (VDD)
The VDD pin is the device’s positive power supply input.
The input power supply is relative to VSS.
While the device VDD < Vmin (2.7V), the electrical
performance of the device may not meet the data sheet
specifications.
3.11
No Connection (NC)
These pins are not internally connected and should be
either connected to VDD or VSS to reduce possible
noise coupling.
3.12
Exposed Pad (EP)
This pad is conductively connected to the device's
substrate. This pad should be tied to the same potential
as the VSS pin (or left unconnected). This pad could be
used to assist as a heat sink for the device when
connected to a PCB heat sink.
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