Topic       : Chips 'n Chips
Author      : Michael Ruge
Version     : chips_x.hyp (01/05/2001)
Subject     : Dokumentation/Hardware
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   Der MC26C31 und der AM26LS30
 
 








   The MC26C31 is a quad differential line driver designed for digital
   data transmission over balanced lines. The MC26C31 meets all the re-
   quirements of standard EIA-422-A while retaining the low-power cha-
   racteristics of CMOS. The MC26C31 accepts TTL or CMOS input levels
   and translates these to EIA-422-A output level. This part uses 
   special output circuitry that enables the individual drivers to 
   power down without loading down the bus. The MC26C31 also includes
   special circuitry which will set the outputs to a high impedance
   mode during power up or down, preventing spurious glitches. This
   device has enable and disable circuitry common for all four drivers.
 








 
 
 
   The AM26LS30 is a low power Schottky set of line drivers which can
   be configured as two differential drivers which comply with 
   EIA-422-A standards, or as four single-ended which comply with
   EIA-423-A standards. A mode select pin and appropriate choice of
   power supplies determine the mode. Each driver can source and sink
   currents in excess of 50mA.
   In the differential mode (EIA-422-A) the drivers can be used up to
   10Mbaud. A disable pin for each driver permits setting the outputs
   into a high impedance mode within a +-10 V common mode range.
   In the single-ended mode (EIA-423-A) each driver has a slew rate
   control pin which permits settings the slew rate of the output signal
   so as to comply with EIA-423-A and FCC requirements and to reduce
   crosstalk. When operated from symmetrical supplies (+-5.0V), the 
   outputs exhibit zero imbalance.














 
     Kapitel Der MC26C31 und der AM26LS30, Seite 1