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DS8838N Datasheet

  • DS8838N

  • Quad Unified Bus Transceiver

  • 86.40KB

  • 5頁(yè)

  • NSC

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DS8838 Quad Unified Bus Receiver
May 1999
DS8838
Quad Unified Bus Transceiver
General Description
The DS8838 is a quad high speed driver/receiver designed
for use in bus organized data transmission systems intercon-
nected by terminated 120鈩?impedance lines. The external
termination is intended to be 180鈩?resistor from the bus to
the +5V logic supply together with a 390鈩?resistor from the
bus to ground. The bus can be terminated at one or both
ends. Low bus pin current allows up to 27 driver/receiver
pairs to utilize a common bus. The bus loading is unchanged
when V
CC
= 0V. The receivers incorporate hysteresis to
greatly enhance bus noise immunity. One two-input NOR
gate is included to disable all drivers in a package simulta-
neously. Receiver performance is optimized for systems with
bus rise and fall times
鈮?/div>
1.0 碌s/V.
Features
n
n
n
n
n
n
n
n
n
4 totally separate driver/receiver pairs per package
1V typical receiver input hysteresis
Receiver hysteresis independent of receiver output load
Guaranteed minimum bus noise immunity of 1.3V, 2V
typ.
Temperature-insensitive receiver thresholds track bus
logic levels
20 碌A(chǔ) typical bus terminal current with normal V
CC
or
with V
CC
= 0V
Open collector driver output allows wire-OR connection
High speed
Series 74 TTL compatible driver and disable inputs and
receiver outputs
Typical Application
DS005812-1
漏 1999 National Semiconductor Corporation
DS005812
www.national.com

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