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74HC258 pdf datasheet
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大小:144 |
2008-08-06
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MM54HC258/MM74HC258 Quad 2-Channel
TRI-STATEÉ Multiplexer (Inverted Output)
General Description
This Quad 2-to-1 line data selector/multiplexer utilizes advanced
silicon-gate CMOS technology. Along with the high
noise immunity and low power dissipation of standard
CMOS integrated circuits, these possess the ability to drive
LS-TT loads. The large output drive capability with the
TRI-STATE feature make this device ideal for interfacing
with bus lines in a bus organized system. When the Output
Control line is taken high, the outputs of all four multiplexers
are sent into a high impedance state. When the Output Control
line is low, A or B data is selected for the HC258. The
54HC/74HC logic family is speed, function, and pin-out
compatible with the standard 54LS/74LS logic family.
All inputs are protected from damage due to static discharge
by internal diode clamps to VCC and ground.
Features
Y Typical propagation delays: 16 ns
Y Wide power supply range: 2V±6V
Y Low quiescent supply current: 80 mA maximum
(74HC Series)
Y TRI-STATE outputs for connection to system buses
Y Added circuitry allows data input levels to float during
TRI-STATE with no additional power consumption
TRI-STATEÉ Multiplexer (Inverted Output)
General Description
This Quad 2-to-1 line data selector/multiplexer utilizes advanced
silicon-gate CMOS technology. Along with the high
noise immunity and low power dissipation of standard
CMOS integrated circuits, these possess the ability to drive
LS-TT loads. The large output drive capability with the
TRI-STATE feature make this device ideal for interfacing
with bus lines in a bus organized system. When the Output
Control line is taken high, the outputs of all four multiplexers
are sent into a high impedance state. When the Output Control
line is low, A or B data is selected for the HC258. The
54HC/74HC logic family is speed, function, and pin-out
compatible with the standard 54LS/74LS logic family.
All inputs are protected from damage due to static discharge
by internal diode clamps to VCC and ground.
Features
Y Typical propagation delays: 16 ns
Y Wide power supply range: 2V±6V
Y Low quiescent supply current: 80 mA maximum
(74HC Series)
Y TRI-STATE outputs for connection to system buses
Y Added circuitry allows data input levels to float during
TRI-STATE with no additional power consumption
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