HALO’s “TnT” Thin Net Transceiver Modules
Description of Pin Functions
CD± Collision. A balanced 10MHz differential
output from the module to the station equip-
ment when a collision is detected, when exces-
sive data occurs (jabber) or during the SQE Test
(Heartbeat Test).
RX± Receive Data. A balanced line driver
output from the module to the station equip-
ment providing received data detected on the
network.
TX± Transmit Data. A balanced line receiver
input to the module from the station equipment
to drive transmit data onto the network.
VCC ±5% Input Supply. (Please refer to the
Module Descriptions)
GND Ground. Ground is referenced to the
VCC. (Do not connect this ground to CABLE
SHIELD since the COAX SHIELD must be iso-
lated from the station equipment).
VEE Negative Supply. Nominally -9 volts refer-
enced to coax shield ground.
NC No Connection. (Optional Enable feature
- Module is off when a “0” signal is supplied.
-
plied).
HBE Heartbeat Enable. This input enables the
SQE (also called Heartbeat) Test when con-
nected to (isolated) ground and disables the
test when connected to VEE. This pin must be
connected to VEE for repeater applications.
TXO Network Signal Transmitter. Connects
to the network COAX center conductor through
an internal 1N916 diode, and transmits all sig-
nals from the MCC to the network.
RXI Network Signal Receiver. Connects to the
network COAX center conductor, and receives
packet data and detects the collision voltage
levels.
CDS Collision Detect Sense. Connects directly
to the network shield and references the colli-
sion detection voltage level.
For additional information contact your local representative, or HALO’s support staff at (650) 903-3800 or info@haloelectronics.com
Pins 1 - 2
Pins 3 - 4
Pins 5 - 6
Pin 9
Pin 10
Pin 11
Pin 12
Pin 16
Pin 17
Pin 18
Pin 20
Typical Applications:
• Backplane Applications
• Network Interface Cards
• 10BASE-T Hub with 10BASE2 Interface
• 10BASE2 Repeaters
• Thin Net Transceivers
• Print Servers
• Applications Requiring “Optional” 10BASE2 Ports
Dimensions: inch [mm]