74VHC245M

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74VHC245M is a device of logic-level transceivers, which is a bidirectional device allowing both data flow directions. It is commercial grade with typical output voltage of VCC min. 2.0 V, and is ideal to be used as a buffer and bidirectional control signal transmission in any applications working with VCC range of 2.0V-5.5V, with a fast switch time of 31.3 ns typ. 74VHC245M supports full handshake protocol, low power consumption of 10 mA typ. and bi-directional bus-hold feature without external pull-up resistors. Moreover, it has a low output average current of 60 μA max.

The application fields of 74VHC245M are primarily controlling circuits for computers, industrial and commercial applications requiring fast data flow, signal transmission in mixed-signal circuits, and power management circuits. Standard electronic components like switch, buttons, rotary knobs, sensors like gyroscope and accelerometer, as well as memory technologies like SRAM and DRAM, connected to microcontrollers can be easily interfaced and connected to set up a communication interface circuit with 74VHC245M.

The working principle of 74VHC245M is based on CMOS logic - two complementary MOSFETs (Metal-Oxide-Semiconductor Field Effect Transistors) produced in integrated circuits plus open-collector output transistors in the same integrated circuits. The standard source of power supply for the integrated circuits are voltages generated by the inputs (button, switch, knobs, etc), simulating a complete integrated circuit design with input and output specifications. This design allows for single channel and multiple channel transmission with CMOS logic buffer gates applied to an output to become a bidirectional buffered transceiver.

74VHC245M supports five logic level input signals, including 5 V/LO and HI/3 V with outputs from 24V to 5V logic level. Inputs and outputs are class 1 ESD protected and are designed to sustain voltage up to 1000V at 3MHz for 30 seconds for an operating temperature of -40°C to +85°C. 74VHC245M is characterized with built-in oscillator, allowing it to drive the output clock at 1/16x of the input clock at the end of clock pulse by even-phase, and can be used as a low power data buffer working with other logic devices.

It is a bidirectional logic cell, where the transmission of data from the Input port to the Output port is done via the parallel lines by an NMOS transistor. The output port is connected to a receiver buffer with minimum noise power at low voltage inputs. The non-inverting data output signals is obtained by the Low-Level Output (LLO) and the inverting data output signals is obtained by the High-Level Output (HLO). If a logic high logic level is observed on the HLO pin, a logic low level is observed on the other output pins.

In conclusion, 74VHC245M is a versatile logic-level transceiver device which is ideal for applications requiring data communication and switching, working with a wide range of VCC and low power consumption. It is a low power, fast speed and highly efficient CMOS logic-level transceiver that can be used for data transmission and switching in any device or application where fast data flow and control signal transmission is needed.

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