MD-004HRL HALO

TnT - Thinnet Transceiver Complete On-Board Thinnet Solution Product Features: Conflict RoHS FREE Compliant Compliant with ANSI/IEEE802.3 and ISO8802-3 Standards for Thin Net DC/DC Converter. Contains all Thin Net Transceiver Functions in a Single 20-pin Package. Squelch Circuits on All Signal Inputs to Elimi- nate Noise Heartbeat Function Enable/Disable Input Vee Ripple Input Current Operating Storage Enable Part Number Voltage (Max. @ 20MHz) (max) Temp. Temp. Feature MD-001HRL 5V 5% 100mVpp 225mA 0 to 70C -40 to +125C No MD-002HRL 5V 5% 100mVpp 235mA 0 to 70C -40 to +125C Yes MD-003HRL 3.3V 5% 100mVpp 340mA 0 to 70C -40 to +125C No MD-004HRL 3.3V 5% 100mVpp 340mA 0 to 70C -40 to +125C Yes MD-012HRL 12V 5% 100mVpp 110mA 0 to 70C -40 to +125C No MD-013HRL 12V 5% 100mVpp 115mA 0 to 70C -40 to +125C Yes MDQ-001HRL 5V 5% 40mVpp 225mA 0 to 70C -40 to +125C No Notes: 1. Please contact the factory or representative for individual datasheets or additional information. 2. Surface mount options also available. HALOs Commitment to Long Term Availability The transceiver chip inside of the HALO TnT module is the H83C92. Over the years, the IC industry has either discontin- ued or announced End of Life (EOL) of the 83C92 ICs traditionally used in Thinnet applications. The IEEE802.3 compliant H83C92 transceiver chip has been developed by HALO to provide long term availability of the TnT module family. For additional information contact your local representative, or HALOs support staff at (650) 903-3800 or info@haloelectronics.comHALOs TnT Thin Net Transceiver Modules 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] Description of Pin Functions Pins 1 - 2 CD Collision. A balanced 10MHz differential Pin 17 TXO Network Signal Transmitter. Connects output from the module to the station equip- to the network COAX center conductor through ment when a collision is detected, when exces- an internal 1N916 diode, and transmits all sig- sive data occurs (jabber) or during the SQE Test nals from the MCC to the network. (Heartbeat Test). Pin 18 RXI Network Signal Receiver. Connects to the Pins 3 - 4 RX Receive Data. A balanced line driver network COAX center conductor, and receives output from the module to the station equip- packet data and detects the collision voltage ment providing received data detected on the levels. network. Pin 20 CDS Collision Detect Sense. Connects directly Pins 5 - 6 TX Transmit Data. A balanced line receiver to the network shield and references the colli- input to the module from the station equipment sion detection voltage level. to drive transmit data onto the network. Pin 9 VCC 5% Input Supply. (Please refer to the Module Descriptions) Pin 10 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). Pin 11 VEE Negative Supply. Nominally -9 volts refer- enced to coax shield ground. Pin 12 NC No Connection. (Optional Enable feature - Module is off when a 0 signal is supplied. - plied). Pin 16 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. For additional information contact your local representative, or HALOs support staff at (650) 903-3800 or info@haloelectronics.com