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PDF DS3890 Data sheet ( Hoja de datos )
| Número de pieza | DS3890 | |
| Descripción | (DS3890 / DS3892) Octal Trapezoidal Driver / Octal TRI-STATE Receiver | |
| Fabricantes | National Semiconductor | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de DS3890 (archivo pdf) en la parte inferior de esta página. Total 8 Páginas | ||
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www.DataSheet4U.com
January 1996
DS3890 BTL Octal Trapezoidal Driver
DS3892 BTL Octal TRI-STATE Receiver
General Description
The DS3890 and DS3898 are designed specifically to over-
come problems associated with driving densely populated
backplanes These products provide significant improve-
ment in both speed and data integrity in comparison to con-
ventional bus drivers and receivers Their low output capaci-
tance low voltage swing and noise immunity features make
them ideal for driving low impedance busses with minimum
power dissipation
The DS3890 features an open collector outputs that gener-
ate precise trapezoidal waveforms with typical rise and fall
times of 6 ns which are relatively independent of capacitive
loading conditions These controlled output characteristics
significantly reduce noise coupling to adjacent lines
To minimize bus loading the DS3890 also features a
schottky diode in series with the open collector outputs that
isolates the driver output capacitance in the disabled state
With this type of configuration the output low voltage is typi-
cally ‘‘1V’’ The output high level is intended to be 2 volts
Logic and Connection Diagrams
DS3890 Octal Trapezoidal Driver
This is achieved by terminating the bus with a pull up resis-
tor Both devices can drive an equivalent DC load of 18 5X
(or greater) in the defined configuration
(General Description to be continued)
Features
Y Driver output capacitance less than 5 pF
Y 1 volt bus signal reduces power consumption
Y Trapezoidal driver waveforms (tr tf typically 6 ns) re-
duces noise coupling to adjacent lines
Y Precise receiver threshold track the bus logic high level
to maximize noise immunity in both logic high ahd low
states
Y Open collector driver output allows wire-or connection
Y Advanced low power schottky technology
Y Glitch free power up down protection
Y TTL compatible driver and control inputs and receiver
output
Y BTL compatible
DS3892 Octal TRI-STATE Receiver
TL F 8700 – 1
Order Numbers DS3892M DS3890N or DS3892N
See NS Package Number M20B or N20A
TL F 8700 – 2
TRI-STATE is a registered trademark of National Semiconductor Corporation
C1996 National Semiconductor Corporation TL F 8700
RRD-B30M36 Printed in U S A
http www national com
1 page  
www.DataSheet4U.com
AC Switching Waveforms (Continued)
TL F 8700 – 6
Note tRetFk10 ns from 10% to 90%
FIGURE 2 Receiver Propagation Delays
TL F 8700 – 7
tDLZ
tDZL
TL F 8700 – 8
tDHZ
TL F 8700 – 14
Note tR e tF k 5 ns from 10% to 90%
tDZH
TL F 8700 – 9
Note tR e tF k 5 ns from 10% to 90%
TL F 8700 – 15
FIGURE 3 Propagation Delay from Disable Pin to An
TL F 8700 – 16
5 http www national com
5 Page | ||
| Páginas | Total 8 Páginas | |
| PDF Descargar | [ Datasheet DS3890.PDF ] | |
Hoja de datos destacado
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| DS3892 | (DS3890 / DS3892) Octal Trapezoidal Driver / Octal TRI-STATE Receiver | National Semiconductor |
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