CY7B8392
CY7B8392 is Ethernet Coax Transceiver Interface manufactured by Cypress.
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 Bi CMOS process. Typical standby current during idle is 25 m A.
Features
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- pliant with IEEE802.3 10BASE5 and 10BASE2 Pin patible 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 Bi CMOS 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+
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
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) VEE (NC) VEE VEE VEE (NC) VEE (NC) VEE (NC)
PLCC Top View
RX+ CD- CD+ CDS TXO NC RXI 4 3 2 1 28 2726 5 6 7 7B8392 8 9 10 11 1213 14 15 16 1718 RX- TX+ 25 24 23 22 21 20 VEE (NC) VEE VEE (NC) VEE (NC) VEE VEE (NC) RR- 8392- 3 TX- HBE GND GND RR+
8392- 2
Cypress Semiconductor Corporation Document #: 38-02016 Rev.
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- 3901 North First Street
- San Jose
- CA 95134
- 408-943-2600 Revised January 1996
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