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PDF DS36950 Data sheet ( Hoja de datos )

Número de pieza DS36950
Descripción Quad Differential Bus Transceiver
Fabricantes National Semiconductor 
Logotipo National Semiconductor Logotipo



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No Preview Available ! DS36950 Hoja de datos, Descripción, Manual

July 1998
DS36950
Quad Differential Bus Transceiver
General Description
The DS36950 is a low power, space-saving quad EIA-485
differential bus transceiver especially suited for high speed,
parallel, multipoint, computer I/O bus applications. A com-
pact 20-pin surface mount PLCC package provides high
transceiver integration and a very small PC board footprint.
Timing uncertainty across an interface using multiple de-
vices, a typical problem in a parallel interface, is
specified — minimum and maximum propagation delay
times are guaranteed.
Six devices can implement a complete IPI master or slave in-
terface. Three transceivers in a package are pinned out for
connection to a parallel databus. The fourth transceiver, with
the flexibility provided by its individual enables, can serve as
a control bus transceiver.
Features
n Pinout for IPI interface
n Compact 20-pin PLCC package
n Meets EIA-485 standard for multipoint bus transmission
n Greater than 60 mA source/sink
n Thermal Shutdown Protection
Pinout and Logic Diagram
DS010602-1
Order Number DS36950
See NS Package Number V20A
DS010602-2
TRI-STATE® is a registered trademark of National Semiconductor Corporation.
© 1999 National Semiconductor Corporation DS010602
www.national.com

1 page




DS36950 pdf
Parameter Measurement Information (Continued)
DS010602-13
FIGURE 6. Receiver Differential Propagation Delay Timing
DS010602-14
S1 1.5V
S2 OPEN
S3 CLOSED
S1 1.5V
S2 CLOSED
S3 CLOSED
DS010602-15
DS010602-16
S1 −1.5V
S2 CLOSED
S3 OPEN
DS010602-17
DS010602-18
S1 −1.5V
S2 CLOSED
S3 CLOSED
FIGURE 7. Receiver Enable and Disable Timing
DS010602-19
5 www.national.com

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