ACS101A Semtech Corporation, ACS101A Datasheet
ACS101A
Manufacturer Part Number
ACS101A
Description
Acapella Optical Modem ic
Manufacturer
Semtech Corporation
Datasheet
1.ACS101A.pdf
(12 pages)
Acapella Optical Modem IC
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The ACS101A is a complete controller, driver and receiver IC, supporting full-
duplex asynchronous transmission from DC to 76.8kbps and synchronous
data rates up to 512kbps over one optical fiber. The ACS101A also supports
two additional low frequency asynchronous channels or RS-232 handshake
signals, RTS, CTS, DTR and DSR.
The ACS101A employs data compression and time compression techniques,
affording high launch power in short bursts, leading to a low average power
consumption. The advantage of this approach is that high link budgets can be
achieved with inexpensive optical components.
Communicating optical modems automatically maintain synchronisation
with each other such that the receive phase of one modem is lined-up with
the transmit phase of the other, compensating for the propagation delay
presented by the link. Link lengths from zero to maximum distance are
catered for automatically. In 'standard' mode, the fiber may be up to 2.5km
long, or up to 5km in 'double' mode.
TxD
TxCL
Rx D
Rx CL
Full duplex serial transmission over one fiber.
Link lengths up to 5km.
Supports asynchronous data rates from DC to 76.8kbps.
Supports synchronous data rates up to 512kbps.
Full diagnostic modes - Remote and Local loopback.
Uses a single Ping Pong LED (PPLED) to both receive and transmit
data for single fiber operation.
Supports two additional low frequency asynchronous channels or
the RS-232 handshake signals.
Digital mode for non fiber applications - RF.
Bit Error Rate (BER) < 10
Available in 44 pin PLCC package.
ACS101A Main Features:
DCDB CTS
Digital
Digital
Filter
Filter
RS-232 Interface
General Description:
DSR
Decompress
Compress
Equivalent Block Diagram of ACS101A
RSS
1
Data
Data
RTS DTR
Decompress
FIFO Time
FIFO Time
Compress
-9
DR(3:1) DM(3:1)
Control Logic
Encoder
Decoder
3B4B
3B4B
CKC
PORB
Receiver
TRC
Driver
LED
LED
ACS101A Issue 1.2 October 1999.
PPLED
2
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