Ethernet Coax Transceiver Interface
CY7B8392
Ethernet Coax Transceiver Interface
1CY7B8392
Functional Description
The CY7B8392 is a low power coaxial tran...
Description
CY7B8392
Ethernet Coax Transceiver Interface
1CY7B8392
Functional Description
The CY7B8392 is a low power coaxial transceiver for Ethernet 10BASE5 and 10BASE2 applications. The device contains all the circuits required to perform transmit, receive, collision detection, heartbeat generation, jabber timer and attachment unit interface (AUI) functions. In addition, the CY7B8392 features an advanced hybrid collision detection. The transmitter output is connected directly to a double terminated 50Ω cable. The CY7B8392 is fabricated with an advanced low power BiCMOS process. Typical standby current during idle is 25 mA.
Features
Compliant with IEEE802.3 10BASE5 and 10BASE2 Pin compatible with the popular 8392 Internal squelch circuit to eliminate input noise Hybrid mode collision detect for extended distance Automatic AUI port isolation when coaxial connector is not present Low power BiCMOS design 16-Pin DIP or 28-Pin PLCC
Logic Block Diagram
RX+ HIGH PASS EQUALIZATION CCM AUI DRIVER RX– RXI LOW PASS FILTER – LOW PASS FILTER + CARRIER SENSE AUI DRIVER CD–
CD+
GND
TX+ TX–
– CDS RCV TXO LOW PASS FILTER +
COLLISION
WAVEFORM SHAPING
+ –
DC/AC SQUELCH
VEE RR+ 1K RR– REFERENCE CIRCUIT
10 MHz CLK OSC
WATCH DOG TIMER 26 ms
JABBER RESET TIMER 0.4 sec
TRANSMIT STATE MACHINE
RECEIVE STATE MACHINE
HBE
8392–1
Pin Configurations
DIP Top View
CD+ CD– RX+ VEE VEE RX– TX+ TX– 1 2 3 4 5 6 7 8 7B8392 16 15 14 13 12 11 10 9 CDS TXO RXI VEE RR– RR+ GND HBE VEE (NC) VE...
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