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ML4662 10BASE-FL Transceiver
型号:   ML4662
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描述:   10BASE-FL Transceiver
文件大小 :   241 K    12 页
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品牌   MICRO-LINEAR [ MICRO LINEAR CORPORATION ]
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100%
March 1997
ML4662
10BASE-FL Transceiver
GENERAL DESCRIPTION
The ML4662 10Base-FL transceiver combined with the
ML4622 or ML4624 fiber optic quantizers provides all of
the functionality required to implement both an internal
and external IEEE 802.3 10Base-FL MAU. The ML4662
offers a standard IEEE 802.3 AU interface that allows it to
be directly connected to industry standard manchester
encoder/decoder chips or and AUI cable.
The ML4662 provides a highly integrated solution that
requires a minimal number of external components, and is
compliant to the IEEE 802.3 10Base-FL standard. The
transmitter offers a current driven output that directly
drives a fiber optic LED transmitter. Jabber, a 1MHz idle
signal, and SQE Test are fully integrated onto the chip.
The receiver accepts and ECL level input coming from the
ML4622 or ML4624 fiber optic quantizers. The 1MHz idle
signal is removed and the AUI output is activated when
the receive squelch criteria is exceeded. A Link Monitor
function is also provided for low light detection.
FEATURES
s
s
s
s
s
s
Combined with the ML4622 or ML4624, offers a
complete implementation of an 10Base-FL Medium
Attachment Unit (MAU)
Incorporates an AU interface for use in an external
MAU or an internal MAU
Single +5 volt supply
±10%
No crystal or clock required
On-chip Jabber, 1MHz idle, and SQE Test with enable/
disable option
Five network status LED outputs
BLOCK DIAGRAM
eas
Pl
10
11
Tx+
Tx–
eM
e Se
4
SQEN/JABD
7 fo
466
L
17
wD
r Ne
+5V
19
gns
esi
12
V
CC
Tx
(+5V)
RTSET
NC/PEAK
AUI
RECEIVER
FIBER OPTIC
LED DRIVER
TxOUT
18
Tx
SQUELCH
1MHz
IDLE
SIGNAL
JABBER
LMON
IN
SQE
RECEIVE SQUELCH
FREQUENCY
AUI
DRIVER
10MHz GATED
OSCILLATOR
RxIN+
RxIN–
22
2
3
COL+
COL–
LINE
RECEIVER
Tx
Rx
LED
DRIVERS
26
25
6
7
Rx+
Rx–
AUI
DRIVER
LOOPBACK
MUX
BIAS
27
XMT LMON
15
24
GND
5
V
CC
(+5V)
8
RRSET
13
LBDIS
23
1
CLSN
JAB
28
RCV
16
+5V
1
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