參數(shù)資料
型號： LXT974
廠商： Intel Corp.
英文描述： Fast Ethernet 10/100 Quad Transceivers
中文描述： 四10/100快速以太網(wǎng)收發(fā)器
文件頁數(shù)： 17/74頁
文件大?。?/td> 1089K
代理商： LXT974
Fast Ethernet 10/100 Quad Transceivers
—
LXT974/LXT975
Datasheet
17
Table 9. LXT974 and LXT975 Miscellaneous Signal Descriptions
Pin#
Symbol
Type
1
Signal Description
2
20
19
18
ADD4
ADD3
ADD2
I
I
I
Address <4:2>
. Set upper three bits of PHY
address. ADD<1:0> are set internally to match
port number as shown at right.
ADD1
ADD0
Port
0
0
0
0
1
1
1
0
2
1
1
3
101, 112, 159
TEST
I
Test.
Must be tied Low.
140
RBIAS
I
Bias
. This pin provides bias current for the internal circuitry. Must be tied to
ground through a 22 k
resistor.
Clock Input
. A 25 MHz clock input is required at this pin. Refer to Functional
Description for detailed clock requirements.
118
CLK25M
I
109
RESET
I
Reset
. This active Low input is OR
’
ed with the control register Reset bit (0.15).
The LXT974/975 reset cycle is extended 205
μ
s (nominal) after Reset is de-
asserted.
102
PWRDN
I
Power Down
. When High, forces LXT974/975 into power down mode. This pin is
OR
’
ed with the Power Down bit (0.11). Refer to
Table 44 on page 64
for more
information.
41, 119, 120
N/C
-
No Connection
.
Leave open.
1. Type Column Coding: I = Input, O = Output, A = Analog.
2. The LXT974/975 supports the 802.3 MDIO register set. Specific bits in the registers are referenced using an
“
X.Y
”
notation,
where X is the register number (0-6 or 16-20) and Y is the bit number (0-15).
Table 10. LXT974 and LXT975 LED Indicator Signal Descriptions
Pin#
2
Symbol
Type
1
Signal Description
3
11
8
4
1
LED0_0
LED1_0
LED2_0
LED3_0
OD
LED0 - Ports 0 - 3
. In default mode, active Low output indicates transmitter active. However,
LED0 is programmable and may also be set to indicate receiver active, link status or duplex
status. Refer to LED Configuration Register,
Table 51 on page 68
, for details on
programming options.
12
9
5
2
LED0_1
LED1_1
LED2_1
LED3_1
OD
LED1 - Ports 0 - 3
. In default mode, active Low output indicates receiver active. However,
LED1 is programmable and may also be set to indicate link status, duplex status, or operating
speed. Refer to LED Configuration Register,
Table 51 on page 68
, for details on
programming options.
13
10
6
3
LED0_2
LED1_2
LED2_2
LED3_2
OD
LED2 - Ports 0 - 3
. In default mode, active Low output indicates link up. However, LED2 is
programmable and may also be set to indicate duplex status, operating speed or collision.
Refer to LED Configuration Register,
Table 51 on page 68
, for details on
programming options.
17
LEDENA
O
LED Enable.
Active High output signals external device that LEDDAT is active.
15
LEDCLK
O
LED Clock.
25 MHz clock for LED serial data output.
16
LEDDAT
O
LED Data.
Serial data output for 24 LEDs (6 x 4 ports) data.
1. Type Column Coding: I = Input, O = Output, OD = Open Drain.
2. Unused pins should be tied Low.
3. The LXT974/975 supports the 802.3 MDIO register set. Specific bits in the registers are referenced using an
“
X.Y
”
notation,
where X is the register number (0-6 or 16-20) and Y is the bit number (0-15).
相關(guān)PDF資料
PDF描述
LXT974A Fast Ethernet 10/100 Quad Transceivers
LXT974AHC Fast Ethernet 10/100 Quad Transceivers
LXT974B Fast Ethernet 10/100 Quad Transceivers
LXT974BHC Fast Ethernet 10/100 Quad Transceivers
LXT975 Fast Ethernet 10/100 Quad Transceivers
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
LXT974A 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:Fast Ethernet 10/100 Quad Transceivers
LXT974AHC 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:Fast Ethernet 10/100 Quad Transceivers
LXT974B 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:Fast Ethernet 10/100 Quad Transceivers
LXT974BHC 制造商:INTEL 制造商全稱:Intel Corporation 功能描述:Fast Ethernet 10/100 Quad Transceivers
LXT974QC 制造商:LEVELONE 功能描述:
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。

采購需求

(若只采購一條型號，填寫一行即可)

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

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

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*