Logic device/transceiver/encoder

The MM74HC374 high-speed octal D-type flip-flop utilizes an advanced silicon-gate CMOS process. The device has the high noise immunity and low power consumption of a standard CMOS integrated circuit, plus the ability to drive 15 LS-TTL loads. Due to their large output drive capability and 3-state nature, these devices are suitable for interfacing bus lines in bus organizing systems. These devices are positive-edge triggered flip-flops. When the clock (CK) input transitions positively, data from the D input that meets the setup and hold time requirements is transferred to the Q output. Applying a high logic level to the output control (OC) input puts all outputs into a high-impedance state, regardless of the signals present at the other inputs and the state of the storage elements. The 74HC logic family is compatible with the standard 74LS logic family in speed, functionality, and pinout. All inputs are protected against damage due to electrostatic charge by internal diodes clamped to VCC and ground.

The VHC112 is an advanced high-speed CMOS inverter fabricated in silicon-gate CMOS technology. It achieves high-speed operation similar to the equivalent bipolar Schottky TTL while maintaining low power consumption in CMOS. The VHC112 contains two independent high-speed JK flip-flops with direction set and clear inputs. A synchronous state change is initiated by the falling edge of the clock. Triggering occurs at a certain level of the clock and is not directly related to the conversion time. The J and K inputs can change at either state of the clock without affecting the flip-flop, provided the values ​​are at the recommended settings and hold time requirements relative to the falling edge of the clock. A low signal on PR or CLR prevents clocking, forcing Q and Q# high, respectively. A simultaneous low on PR and CLR forces both Q and Q# high. Input protection circuitry ensures that 0V to 7V can be applied to the input pins regardless of supply voltage. This device can be used to interface 5V to 3V systems and two power systems such as backup batteries. This circuit prevents damage to the device due to mismatch between power supply and input voltage.