MOTOROLA MC100SX1451FI100
AutoBahn Spanceiver - 100 MByte/s version


MANUFACTURER'S DEVICE DESCRIPTION

The MC100SX1451FI100 AutoBahn chip is a high–speed serial–to–parallel, parallel–to–serial transceiver. The AutoBahn can be used to implement a high–speed, half–duplex, bi–directional serial data link with an effective data transfer rate of 100MByte/sec. A higher performance AutoBahn chip, with user selectable serial data transfer rates of 100 or 200MByte/s, is planned (see the MC100SX1451FI200 datasheet).

This serial link can be used to establish multi–point or point–to–point connections. A unique differential cutoff driver switches from a standard PECL V OH level to cutoff. In the cutoff state the outputs present a high impedance which is required to implement a true shared bus. The part features a 32–bit wide parallel TTL compatible I/O interface that can connect directly with standard memory or bus transceiver devices. The control pins are all TTL compatible to simplify interfacing requirements.

The serial interface is PECL (Positive Emitter Coupled Logic) which provides excellent transmission line drive capability. Because the serial bus is implemented using differential ECL technology, the receiver circuitry exhibits excellent common mode noise rejection.


TRANSMITTER FEATURES

Input Output
Throughput -800 Mbps 900 Mbaud
# bits 32 1 differential
Frequency 25 MHz
Signal levels TTL PECL
 
 
Synchronous/sync with idles/asynchronous synchronous with idles
Input data needs coding no
Error detection no
Power consumption 3500 mW
Power supply voltage +5 V
Package size 64-pin CQFP  1.44cm2 / 12.0 x 12.0 x 4.0 mm
Technology Silicon Bipolar (MOSAIC V)
Radiation hardness unknown
Price CHF 350

DESCRIPTION

INTERFACING

The Motorola AutoBahn Spanceiver is a component that can be used to make a half-duplex 100 MByte/sec point-to-point link. With an accompaning chip, the MC100SX1452 also bus systems can be made with the Autobahn. In this case an external control system must be put in place which decides who may talk. Originally this chip was planned for use in VME bus extensions, but it received little support.

The chip has built in differential output drivers. In standard applications a single output is used to drive a 50 Ohm coaxial cable that may be up to 10 m length.There is a DC component on the outputs as no encoding is performed.

Care has to be taken that the chip has a hold time requirement.

In the datasheets Motorola speaks about higher speed versions of the components, but in the last few months (April 1998) web pages with extended descriptions and slideshows have been removed.

RADIATION HARDNESS

OTHER


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CERN - High Speed Interconnect
Erik Van der Bij - 14 April 1998 - Disclaimer