78Q8392L/A03
Low Power Ethernet
Coaxial Transceiver
November 2008
DESCRIPTION
The 78Q8392L/A03 Ethernet Transceiver is a
replacement
for
the
SSI/TDK/Teridian
78Q8392L/A02 coax line transmitter/receiver. Only a
single resistor value change is required for
upgrading an existing 78Q8392L/A02 design to the
78Q8392L/A03.
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/A03 is available in lead-free 16-pin
plastic and 28-pin PLCC packages.
FEATURES
•
•
•
•
•
•
Very low power consumption
Compliant w ith Ethernet II, IEEE 802.3
10Base5 and 10Base2
Integrates all transceiver functions except
signal and power isolation
Innovative
design
minimizes
external
component 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
•
•
•
CONNECT DIAGRAM
510 ±5%
x4
1
COLLISION
SIGNAL
TO DTE
CD+
VEE
VEE
2
CD–
VEE
CDS
3
DATA TO
DTE
RX+
TXO
RXI
6
RX–
GND
4
5
13
16
15
14
10
–9V
7
DATA FROM
DTE
78
8
HBE
TX+
RR-
TX-
RR+
9
12
COAX
11
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©
2008 Teridian Semiconductor Corporation
Rev 1.3
TERIDIAN [ TERIDIAN SEMICONDUCTOR CORPORATION ]
