74VHCT245BQ,115

Series:	74VHCT
Packaging:	Tape & Reel (TR)
Part Status:	Active
Logic Type:	Transceiver, Non-Inverting
Number of Elements:	1
Number of Bits per Element:	8
Input Type:	--
Output Type:	3-State
Current - Output High, Low:	8mA, 8mA
Voltage - Supply:	4.5 V ~ 5.5 V
Operating Temperature:	-40°C ~ 125°C (TA)
Mounting Type:	Surface Mount
Package / Case:	20-VFQFN Exposed Pad
Supplier Device Package:	20-DHVQFN (4.5x 2.5)
Base Part Number:	74VHCT245

Due to market price fluctuations, if you need to purchase or consult the price. You can contact us or emial to us:   sales@allicdata.com

Logic - Buffers, Drivers, Receivers, Transceivers

The 74VHCT245BQ,115 is an advanced logic IC from Fairchild semiconductor that is a member of its \'VHCT\' (very high-speed CMOS) range of products. This device is a full featured octal driver, one of the various types of logic devices used to manipulate digital signals and enable their transmission. As digital technologies move ever faster, logic devices continue to play a vital role in electronic systems.This device integrates eight non-inverting 3-state buffers with an enable input for making it functional. This enable input is shared for all eight outputs, when it is low the outputs are in their high-impedance state and will not drive their associated bus lines. From a mechanical point of view, the device is packaged in its standard 20-pin dual in-line package (DIP) with a center notch marking its pin 1. The long pins along both sides are its power and enable pins to which a suitable power supply and enable line must be connected respectively.When it functions correctly, the 74VHCT245BQ,115 provides a logic propagation delay of just 15 nanoseconds. This is measured as the time taken for a logic signal to propagate from input to output. It also supports higher currents and higher noise margins than those available with the standard Schmitt buffers. It has a wide operating temperature range between -55°C to +125°C and it can also withstand a wide range of supply voltages from 3.3V to 7.0 V. It also offers surge lifetime performance of up to 1000 cycles.Apart from these stringent performance requirements, the 74VHCT245BQ,115 has many applications in a variety of systems. These range from low power consumer electronics applications such as remote control systems, datacommunciation systems, home entertainment systems to demanding industrial applications and embedded systems. The octal driver also finds extensive usage in the automotive industry for distinguishing signals for engine control and fuel management, motor control and climate control systems.This octal driver offers vital features that make it an excellent choice for driving high-speed signals such as TTL compatible outputs, fast switching times, superior noise immunity and power driver capability. As a result, this device is an important part of the trend towards reducing power consumption and increasing switching speeds of digital systems.

Working Principle

At its core, the 74VHCT245BQ,115 is a logic-level device whose principle of operation lies in the switching between the minor Off and major On states. This is done using an enable input line to put the eight outputs of the device into their high-impedance (Hi-Z) state. The device can also drive up to sixteen outputs in the three-state configuration depending on the polarity of the enable input.Essentially, the device studies the input signals and compares them to the reference levels set at the input logic levels. Depending upon the comparison, the logic output generated corresponds to either a logic 0 or 1 according to the logic level threshold set by the user. This output inherently determines the output of the octal driver and the corresponding output will be sent on the output bus.When the enable input is active, the outputs are then forced to either the high or low state, without operating any of the transistors inside the device. The enable input will also force the outputs in the high-impedance state if no enable signals are present. If a logic 0 is present on the enable input, the outputs are forced to logic 0 levels or the low state; if a logic 1 is present on the enable input, then the outputs are forced to logic 1 levels or the high state.Once the octal driver chip is configured and enabled, the corresponding output bus is connected to the microcontroller, further ensuring that the device is able to transmit data from the microcontroller to the output bus in the shortest possible time.

Conclusion

The 74VHCT245BQ,115 is a reliable octal driver IC from Fairchild Semiconductor that is one of the many fundamental logic devices used in digital systems. In summary, it integrates eight non-inverting 3-state buffers with an enable input and has a fast propagation delay of 15 nanoseconds. It is suitable for a wide range of applications from consumer electronics to automotive systems, offering power driver capability and superior noise immunity. The device is key to increasing the performance of high-speed digital systems as a part of the trend towards reducing power consumption and faster switching speeds.

The specific data is subject to PDF, and the above content is for reference

Part Number	Manufacturer	Price	Quantity	Description