MC74AC240DTR2

Series:	74AC
Packaging:	Tape & Reel (TR)
Part Status:	Obsolete
Logic Type:	Buffer, Inverting
Number of Elements:	2
Number of Bits per Element:	4
Input Type:	--
Output Type:	3-State
Current - Output High, Low:	24mA, 24mA
Voltage - Supply:	2 V ~ 6 V
Operating Temperature:	-40°C ~ 85°C (TA)
Mounting Type:	Surface Mount
Package / Case:	20-TSSOP (0.173", 4.40mm Width)
Supplier Device Package:	20-TSSOP
Base Part Number:	74AC240

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Introduction

The MC74AC240DTR2 is a 3-state octal buffer/line driver composed of two independent sections, each containing four buffers/drivers. It is part of a family of logic products offered by ON Semiconductor. This device is rated for high-speed operation with a propagation delay of 7.25 ns. Its application field includes digital and analog cross-point switching, and high-performance bus design.

Application Field and Working Principle

The MC74AC240DTR2 can be divided into two sections, namely; in-line logic buffers and logic drivers. The logic buffers act as a low-impedance load for the input signals, and provide high–impedance outputs for the output signals. This feature provides high signal integrity and increased noise immunity. The logic drivers section can be activated with input signals from the logic buffers section, and the drivers will amplify the signals in order to drive high capacitance lines. This section is ideal for applications which require multiple driver outputs, such as digital & analog cross-point switching and high-performance bus design. The device features an open-drain enable terminal that can be used to enable or disable both sections. Both sections can also be controlled independently using separate enable inputs.The device is designed for operation in the standard 5V TTL logic family, and is compatible with the 3V logic standard. It also features a voltage translation capability, which enables the device to be used as a voltage translator between systems operating at different logic levels.

Features and Benefits

The MC74AC240DTR2 has several features which provide various benefits. Firstly, its bidirectional 3-state outputs ensure high signal integrity and enable the device to be used in applications requiring high performance levels. The operation of the device is temperature-independent, meaning that it will not be affected by temperature variations. The device also features a low power-on reset that ensures accurate logic operation during power-up. In addition to these features, the device is easy to use due to its pin and package configurations. The buffer/driver sections can be combined and placed side-by-side while their enable inputs can be shared to reduce component count, board space, and cost. The device is also very reliable and has a high level of tolerance for radiation effects, making it suitable for a variety of applications.

Conclusion

The MC74AC240DTR2 buffer/driver is a versatile, reliable and easy-to-use device which offers a number of benefits. Its built-in features such as bidirectional 3-state outputs, temperature-independent operation and low-power-on reset provide increased signal integrity and noise immunity. Furthermore, its pin and package configurations make it easy to use and its integration of two sections reduces component count and cost. These features make the device suitable for a variety of applications, including digital and analog cross-point switching and high-performance bus design.

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