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78Q8392L Datasheet

  • 78Q8392L

  • Low Power Ethernet Coaxial Transceiver

  • 12頁

  • ETC

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78Q8392L
Low Power Ethernet
Coaxial Transceiver
February 1998
DESCRIPTION
The 78Q8392L Ethernet Transceiver is a low power
BiCMOS coax line transmitter/receiver. The device
includes analog transmit and receive buffers, a 10
MHz on-board oscillator, timing logic for jabber and
heartbeat functions, output drivers and bandgap
reference, in addition to a current reference and
collision detector.
This transceiver provides the interface between the
single-ended coaxial cable signals and the
Manchester-encoded differential logic signals.
Primary functional blocks include the receiver,
transmitter, collision detection and jabber timer. This
IC may be used in either internal or external MAU
environments.
The 78Q8392L is available in 16-pin plastic and 28-
pin PLCC packages.
FEATURES
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鈥?/div>
鈥?/div>
鈥?/div>
鈥?/div>
Very low power consumption
Compliant with Ethernet II, IEEE 802.3
10Base5 and 10Base2
Integrates all transceiver functions except
signal and power isolation
Innovative
design
minimizes
external
components count and power consumption
Jabber timer function integrated on chip
Externally selectable CED heartbeat allows
operation with IEEE 802.3 compatible
repeaters
Squelch circuitry at all inputs rejects noise
Power-on reset and test modes
Advanced BiCMOS process
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鈥?/div>
鈥?/div>
CONNECT DIAGRAM
510 鹵5%
x4
1
COLLISION
SIGNAL
TO DTE
CD+
VEE
VEE
2
CD鈥?/div>
VEE
CDS
3
DATA TO
DTE
RX+
TXO
RXI
6
RX鈥?/div>
GND
4
5
13
16
15
14
10
鈥?V
7
DATA FROM
DTE
HBE
TX+
RR-
9
78
8
TX-
12
COAX
RR+
11

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