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Topic       : Chips 'n Chips
Author      : Michael Ruge
Version     : chips_x.hyp (01/05/2001)
Subject     : Dokumentation/Hardware
Nodes       : 1505
Index Size  : 35662
HCP-Version : 3
Compiled on : Atari
@charset    : atarist
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@options    : -i -s +zz -t4
@width      : 75
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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