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IC > ·ÎÁ÷ IC > 74LS(SMD) > 74LS240 (SO20)
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74LS240 (SO20)
ÃÖ¼ÒÁÖ¹®¼ö·® 100°³
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Octal 3-STATE Buffer/Line Driver/Line Receiver

General Description
These buffers/line drivers are designed to improve both the
performance and PC board density of 3-STATE buffers/
drivers employed as memory-address drivers, clock drivers,
and bus-oriented transmitters/receivers. Featuring
400 mV of hysteresis at each low current PNP data line
input, they provide improved noise rejection and high
fanout outputs and can be used to drive terminated lines
down to 133W.

Features
 3-STATE outputs drive bus lines directly
 PNP inputs reduce DC loading on bus lines
 Hysteresis at data inputs improves noise margins
 Typical IOL (sink current)
 - 24 mA
 Typical IOH (source current)
   -15 mA
 Typical propagation delay times
 - Inverting 10.5 ns
 - Noninverting 12 ns
 Typical enable/disable time 18 ns
 Typical power dissipation (enabled)
 - Inverting 130 mW
 - Noninverting 135 mW


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