AL211 Allayer Communications, AL211 Datasheet
AL211
Manufacturer Part Number
AL211
Description
Fast Ethernet Fiber to TP Media Converter
Manufacturer
Allayer Communications
Datasheet
1.AL211.pdf
(20 pages)
.
Figure 1-1
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Product Description
The AL211 is designed for media converter applications. It is intended for 100 Mbit/s Fast Ethernet
fiber optic to twisted pair media converter designs. The device also provides a PECL interface for
use with media connectors such as 1300nm fiber optic modules. The AL211 is compatible with
IEEE 802.3 100Base-FX and 100Base-TX standards.
The integrated media converter provides additional functionality such as fault propagation and
redundant link support that conventional implementations using discrete components typically can
not support. The AL211 also provides a secondary channel for inband management information
exchange.
The AL211 includes: elastic store, scrambler, and descrambler functions to complete the media
converter design.
Secondary Channel Data In
System Block Diagram
Single chip 100 Mbit/s fiber optic to
twisted pair media converter
Low latency
Integrated elastic store for retiming
Supports a secondary channel for manage-
ment
Full duplex capable
Link fault propagation
Fast Ethernet Fiber to TP Media Converter
100 Base
Receiver
100 Base
Receiver
FIFO
TX
TX
Scrambler
Recovery
Reference Only / Allayer Confidential
Clock
Descrambler
Secondary Channel Data Out
Elastic
Store
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FIFO
PECL interface
Supports Auto-negotiation to full
duplex
Remote fault detection capable
Provides support for redundant link
80mA drive capability
Fabricated in CMOS and 48-pin PQFP
package
Recovery
Clock
Elastic
Store
Receiver
PECL
PECL
Driver
Preliminary 1.2
AL211
Transmit
Module
Fiber
Receive
Module
Fiber
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