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ACS401 Datasheet

  • ACS401

  • Acapella Optical Modem IC

  • 8頁

  • SEMTECH   SEMTECH

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Acapella Optical Modem IC
ACS401 Main Features:
* Enables up to four full-duplex serial transmission channels
through a single fiber optic cable, providing eight virtual fiber
paths.
* Two additional low speed handshake signals.
* Supports Ping Pong LED (PPLED) and LASER Duplex
Devices (LDD) for single fiber applications or dual fiber
applications using low cost LED/LASER emitters and PIN
Diode receiver.
* Link lengths up to 95 km with appropriate Laser.
* Maximum data rate 128 kbps - optimised for talk-set
applications.
* Typical 7 mA (average) current consumption, including
LASER drive current.
* Digital mode, allowing the user to add an external amplifier.
Also enables the ACS401 to be used in non-fiber applications.
* Bit Error Rate (BER) of 10
-9
Equivalent block diagram of ACS401.
TRC
TxD1
TxD2
TxD3
TxD4
TxCL
RxD1
RxD2
RxD3
RxD4
RxCL
VA+
VD+
GND
4
3
4
Digital
Filter
FIFO
Compress
3B4B
Encoder
LAP
PPLED
LED Driver
PIN Receiver
Digital
Filter
FIFO
Decompress
3B4B
Decoder
LAN
PINP
PINN
Single
Fiber
CNT
GND
Control Data
Status
Control Logic
XTAL
XO1 XI1 XO2 XI2
HBT CLK9 ERRC ERRL
DR(1:3) DM(1:3) DP(1:4)
PORB
CKC
General Description:
The ACS401 is a complete optical-modem controller/
driver/receiver IC, supporting various user programmable, full-
duplex, synchronous data rates to 128 kbps over a single fiber.
Communicating modems automatically maintain synchronis-
ation 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, up to 95 km, are catered for
automatically.

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