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PDF DS36954 Data sheet ( Hoja de datos )
| Número de pieza | DS36954 | |
| Descripción | Quad Differential Bus Transceiver | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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July 1998
DS36954
Quad Differential Bus Transceiver
General Description
The DS36954 is a low power, quad EIA-485 differential bus
transceiver especially suited for high speed, parallel, multi-
point, I/O bus applications. A compact 20-pin surface mount
PLCC or SOIC package provides high transceiver integra-
tion and a very small PC board footprint.
Propagation delay skew between devices is specified to aid
in parallel interface designs — limits on maximum and mini-
mum delay times are guaranteed.
Five devices can implement a complete SCSI initiator or tar-
get interface. Three transceivers in a package are pinned out
for data bus connections. The fourth transceiver, with the
flexibility provided by its individual enables, can serve as a
control bus transceiver.
Features
n Pinout for SCSI interface
n Compact 20-pin PLCC or SOIC package
n Meets EIA-485 standard for multipoint bus transmission
n Greater than 60 mA source/sink currents
n Thermal shutdown protection
n Glitch-free driver outputs on power up and down
Connection Diagrams
Logic Diagrams
DS011014-1
Order Number DS36954V
See NS Package Number V20A
DS011014-19
Order Number DS36954M
See NS Package Number M20B
TRI-STATE® is a registered trademark of National Semiconductor Corporation.
© 1999 National Semiconductor Corporation DS011014
DS011014-2
www.national.com
1 page  
Parameter Measurement Information (Continued)
S1 to OA for DI = 0V
S1 to OB for DI = 3V
DS011014-9
FIGURE 6. Driver Enable and Disable Timing (tPZL, tPLZ)
DS011014-10
DS011014-11
FIGURE 7. Receiver Differential Propagation Delay Timing
DS011014-12
5 www.national.com
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| Páginas | Total 10 Páginas | |
| PDF Descargar | [ Datasheet DS36954.PDF ] | |
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