參數(shù)資料
型號(hào): L84225
英文描述: L84225 100BaseTX/FX/10BaseT Physical Layer Device technical manual 4/02
中文描述: L84225 100BaseTX/FX/10BaseT物理層設(shè)備的技術(shù)手冊(cè),4月2日
文件頁(yè)數(shù): 5/118頁(yè)
文件大小: 890K
代理商: L84225
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Pin Description
Copyright 1999-2002 by LSI Logic Corporation. All rights reserved.
5 of 118
April, 2002
Media Interface
Pin #
Pin Name
I/O
Description
126
136
145
155
TPOP_[3:0]/
FXIN_[3:0]
I/O
Twisted Pair Transmit Output, Positive.
Fiber Receive Input, Negative.
129
133
148
152
TPON_[3:0]/
FXIP_[3:0]
I/O
Twisted Pair Transmit Output, Negative.
Fiber Receive Input, Positive.
123
139
142
158
TPIP_[3:0]/
FXOP_[3:0]
I/O
Twisted Pair Receive Input, Positive.
Fiber Transmit Output, Positive.
124
138
143
157
TPIN_[3:0]/
FXON_[3:0]
I/O
Twisted Pair Receive Input, Negative.
Fiber Transmit Output, Negative.
130
137
149
156
SD_[3:0]/
FXEN_[3:0]
I
Fiber Interface Signal Detect Input.
Fiber Interface Enable.
When this pin in not tied to GND, the fiber interface is enabled and
this pin becomes a Signal Detect ECL input. The trip point for this
ECL input is determined by the voltage applied to the SD_THR
pin. When this pin is tied to GND, the fiber interface is disabled
(i.e., TP Interface is enabled).
159
SD_THR
---
Fiber Interface Signal Detect Threshold Reference.
The voltage applied to this pin sets the reference level for the fiber
interface SD input pin so that the device can directly connect SD
pin to both 3.3V and 5V fiber optic transceivers. Typically, this pin
is either tied to GND (for 3.3V) or to an external voltage divider (for
5V).
140
REXT
---
Transmit Current Set.
An external resistor connected between this pin and GND will set
the level for the transmit outputs.
Pin Description (Cont.)
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