ML4665 Datasheet, PDF (1/13 Pages) Micro Linear Corporation – Low Cost Single Chip 10BASE-FL Transceiver

March 1997
ML4665
Low Cost Single Chip 10BASE-FL Transceiver
GENERAL DESCRIPTION
The ML4665 is a low power, low cost, single chip
10BASE-FL transceiver. The ML4665 contains a fiber optic
data quantizer and an LED output driver for direct
connection to an optical module(s). The ML4665 offers a
standard IEEE 802.3 AU interface that allows it to be
directly connected to industry standard manchester
encoder/decoder chips or an AUI connector.
The ML4665 provides a highly integrated solution that
requires a minimal number of external components. The
transmitter offers a 100mA maximum current drive output
that directly drives a fiber optic LED transmitter. The
receiver offers a highly stable fiber optic data quantizer
capable of accepting input signals as low as 2mV_P-P with
a 55dB dynamic range.
The ML4665 is a lower cost version of the industry
standard ML4663. To achieve lower cost, the ML4665
eliminates some functionality (as described below) and is
packaged in a 20-lead PLCC package.
FEATURES
s Lower cost single chip solution for 10BASE-FL internal
or external Medium Attachment Units (MAUs)
s Incorporates an AU interface
s Highly stable data quantizer with 55dB input
dynamic range
s Input sensitivity as low as 2mV_P-P
s 100mA maximum current driven fiber optic LED driver
for accurate launch power
s Single +5 volt supply
s No crystal or clock required
s Link monitor LED indicator
BLOCK DIAGRAM
Tx+ 7
Tx– 8
AUI
RECEIVER
Tx
SQUELCH
1MHz IDLE
SIGNAL
V_CCTx
(+5V)
12
+5V
RTSET
9
FIBER OPTIC
LED
DRIVER
JABBER
AV_CC
20
13 TxOUT
COL+ 2
COL– 3
AUI
DRIVER
Rx+ 4
Rx– 5
AUI
DRIVER
COL
10MHz GATED
OSCILLATOR
Tx
LOOPBACK
MUX
Rx
RECEIVE SQUELCH
AMP
CMP
∫
14
GND
6
V_CC
(+5V)
10
1
RRSET LBDIS
+5V
17
AGND
LINK DETECT
15
C_TIMER
BIAS
11 ^LMON
19 V_IN+
18 V_IN-
V_REF
16 V_DC
1