资料介绍
MM54HC374/MM74HC374
TRI-STATEÉ Octal D-Type Flip-Flop
General Description
These high speed Octal D-Type Flip-Flops utilize advanced
silicon-gate CMOS technology. They possess the high noise
immunity and low power consumption of standard CMOS
integrated circuits, as well as the ability to drive 15 LS-TTL
loads. Due to the large output drive capability and the TRISTATE
feature, these devices are ideally suited for interfacing
with bus lines in a bus organized system.
These devices are positive edge triggered flip-flops. Data at
the D inputs, meeting the setup and hold time requirements,
are transferred to the Q outputs on positive going transitions
of the CLOCK (CK) input. When a high logic level is applied
to the OUTPUT CONTROL (OC) input, all outputs go to a
high impedance state, regardless of what signals are present
at the other inputs and the state of the storage elements.
The 54HC/74HC logic family is speed, function, and pinout
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 delay: 20 ns
Y Wide operating voltage range: 2±6V
Y Low input current: 1 mA maximum
Y Low quiescent current: 80 mA maximum
Y Compatible with bus-oriented systems
Y Output drive capability: 15 LS-TTL loads
TRI-STATEÉ Octal D-Type Flip-Flop
General Description
These high speed Octal D-Type Flip-Flops utilize advanced
silicon-gate CMOS technology. They possess the high noise
immunity and low power consumption of standard CMOS
integrated circuits, as well as the ability to drive 15 LS-TTL
loads. Due to the large output drive capability and the TRISTATE
feature, these devices are ideally suited for interfacing
with bus lines in a bus organized system.
These devices are positive edge triggered flip-flops. Data at
the D inputs, meeting the setup and hold time requirements,
are transferred to the Q outputs on positive going transitions
of the CLOCK (CK) input. When a high logic level is applied
to the OUTPUT CONTROL (OC) input, all outputs go to a
high impedance state, regardless of what signals are present
at the other inputs and the state of the storage elements.
The 54HC/74HC logic family is speed, function, and pinout
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 delay: 20 ns
Y Wide operating voltage range: 2±6V
Y Low input current: 1 mA maximum
Y Low quiescent current: 80 mA maximum
Y Compatible with bus-oriented systems
Y Output drive capability: 15 LS-TTL loads
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