M74HCT245RM13TR Integrated Circuits (ICs)

Series:	74HCT
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
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:	6mA, 6mA
Voltage - Supply:	4.5 V ~ 5.5 V
Operating Temperature:	-55°C ~ 125°C (TA)
Mounting Type:	Surface Mount
Package / Case:	20-SOIC (0.295", 7.50mm Width)
Supplier Device Package:	20-SOP
Base Part Number:	74HCT245

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Introduction

The M74HCT245RM13TR is a high-speed, low voltage, quad-channel, bidirectional bus transceiver with a bus hold feature, designed for use in asynchronous communication systems up to 6 MHz. It is optimized for use with TTL and CMOS, inputs and outputs on a single supply and has improved output characteristics.

Application Field and Working Principle

The M74HCT245RM13TR logic buffers, drivers, receivers, and transceivers are widely used in a variety of design applications. It helps to provide the necessary output current to drive these buses when data is accepted by the receivers of other devices. It is a popular component because of its ability to interface between ICs and communication systems with various data rates and input/output levels, while bringing together speed and noise immunity.The working principle of M74HCT245RM13TR is fairly simple. The transceiver has two channels and four independent line drivers/receivers with full direction control. The directional control allows data to be sent to or received from the channels by setting the appropriate logic level on the Direction Control pins. When a line driver is enabled, the output buffers drive the corresponding channel line with a low, defined voltage level. When enabled, the line receiver monitors both channels, and the received byte is either accepted or rejected based on the logic conditions of the other channel.

Features

The M74HCT245RM13TR transceiver has several key features that make it stand out in comparison to other solutions. The power supply range is 4.5 volts to 5.5 volts, and enables operation up to 6 MHz. It offers improved output characteristics, as well as low-voltage operation and high noise immunity. The device also provides protection against current overload in both outputs and inputs, as well as a bus hold feature which guarantees the output impedance is greater than the bus impedance. This eliminates floating bus conditions, by keeping the data valid during slow transitions (e.g. wait states).

Conclusion

The M74HCT245RM13TR is a versatile and reliable logic buffers, drivers, receivers, and transceivers, which is widely used for asynchronous communication systems. It can operate at speeds up to 6 MHz and offers improved output characteristics with a wide supply voltage range. It also features a bus hold feature which eliminates potential floating bus conditions.

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