78Q8392L Datasheet, PDF (1/14 Pages) Teridian Semiconductor Corporation – Low Power Ethernet Coaxial Transceiver

78Q8392L/A03
Low Power Ethernet
Coaxial Transceiver
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.
November 2008
FEATURES
• 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
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
COLLISION
SIGNAL
TO DTE
DATA TO
DTE
DATA FROM
DTE
1 _CD+
2
CD–
3
RX+
6 _RX–
7 _TX+
78
8 _TX-
VEE ⁴
VEE ⁵
VEE ¹³
CDS ¹⁶
TXO ¹⁵
RXI ¹⁴
GND ¹⁰
HBE ⁹
12
RR-
RR+ ¹¹
–9V
COAX
Page: 1 of 14
© 2008 Teridian Semiconductor Corporation
Rev 1.3