參數(shù)資料
型號(hào): 82503
廠商: Intel Corp.
英文描述: DUAL SERIAL TRANSCEIVER (DST)
中文描述: 雙串行收發(fā)器(DST)的
文件頁(yè)數(shù): 6/45頁(yè)
文件大?。?/td> 562K
代理商: 82503
82503
2.1 Power Pins
Symbol
PLCC
Pin
QFP
Pin
Type
Name and Function
V
SS(1)
7, 17, 39
1, 11, 33
Supply
Digital Ground.
V
CC(1)
6, 18, 40
44, 12, 34
Supply
Digital V
CC
.
A 5-V
g
5% Power Supply.
V
CCA(1)
28
22
Supply
Analog V
CC
.
A 5-V
g
5% Power Supply.
V
SSA(1)
29
23
Supply
Analog Ground.
NOTE:
1. V
and V
must be connected to the same power supply. V
and V
must be connected to the same ground.
Separate decoupling and noise conditioning (e.g., ferrite beads) should be used.
2.2 Clock Pins
Symbol
PLCC
Pin
QFP
Pin
Type
Name and Function
X1
21
15
I
CLOCK CRYSTAL.
A 20 MHz crystal input. This pin can be driven
with an external MOS level clock when X2 is left floating.
X2
20
14
O
CLOCK CRYSTAL.
A 20 MHz crystal output. X1 can be driven with
an external MOS level clock when this pin is left floating.
2.3 AUI Pins
Symbol
PLCC
Pin
QFP
Pin
Type
Name and Function
TRMT
TRMT
27
26
21
20
O
O
TRANSMIT PAIR.
A differential output driver pair that drives the
transmit pair of the transceiver cable. The output bit stream is
Manchester encoded. Following the last transition, which is positive
at TRMT, the differential voltage is reduced to zero volts.
RCV
RCV
31
30
25
24
I
I
RECEIVE PAIR.
A differentially driven input pair which is tied to the
receive pair of the Ethernet transceiver cable. The first transition on
RCV is negative-going to indicate the beginning of the frame. The
last transition is positive-going to indicate the end of the frame. The
received bit stream is assumed to be Manchester encoded.
CLSN
CLSN
25
24
19
18
I
I
COLLISION PAIR.
A differentially driven input pair tied to the
collision presence pair of the Ethernet transceiver cable. The
collision presence signal is a 10 MHz square wave. The first
transition at CLSN is negative-going to indicate the beginning of the
signal; the last transition is positive-going to indicate the end of the
signal.
6
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