逻辑器件/收发器/编码器

The MM74HC273 edge-triggered flip-flop utilizes an advanced silicon-gate CMOS process to implement a D-type flip-flop. They feature high noise immunity, low power consumption and higher speed compared to low power Schottky TTL circuits. The device contains 8 master-slave flip-flops with common clock and common clear. Data on the D input that meets setup and hold time requirements is transferred to the Q output on a low-to-high transition of the clock input. Clearing the input low sets all outputs to the low state. Each output is capable of driving a load equivalent to 10 low-power Schottky TTLs. The MM74HC273 is functionally compatible with the 74LS273. Protect all inputs from electrostatic discharge damage by diode-connecting VCC and ground.

CD74HC273 High-speed CMOS logic octal D-type flip-flop with reset

SN74HC374 Octal Edge D-Type Flip-Flop with 3-State Outputs

SN74HC175 Quad D-Type Flip-Flop with Clear

The MM74HC74A is fabricated on an advanced CMOS process and operates at speeds comparable to LS-TTL parts. It has high noise immunity and low power consumption of a standard CMOS integrated circuit and can drive 10 LS-TTL loads. This flip-flop has independent data, preset, clear and clock inputs, and Q and Q# outputs. During the forward transition of the clock pulse, the logic level at the data input is transferred to the output. The preset and clear inputs are clock independent and are accomplished with a low on the appropriate input. The 74HC logic family is functionally and pin-out compatible with the standard 74LS logic family. All inputs are protected from electrostatic discharge damage by clamping internal diodes to VCC and ground.

The high-performance silicon-gate CMOS MC74HC574A has the same pin-out as the LS574. The device inputs are compatible with standard CMOS outputs; pull-up resistors are included for compatibility with LSTTL outputs. Data that meets the setup time requirements is clocked to the output with the rising edge of the clock. The output-enable input does not affect the state of the flip-flops, but all device outputs are forced to a high-impedance state when output-enable is high. Therefore, data can be stored even if the output is not enabled. The HC574A has the same functionality as the HCT374A, but has a trigger input on the opposite side of the encapsulation output, simplifying PC motherboard layout.