74LCXR2245WMX

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74LCXR2245WMX: Logic - Buffers, Drivers, Receivers, Transceivers

The 74LCXR2245WMX is a popular logic device from ON Semiconductor, that belongs to their 2004 Logic - Buffers, Drivers, Receivers, and Transceivers family of devices. This device is specifically designed for applications requiring bidirectional non-inverting logic, and it provides link between high-speed logic buses and card level logic pathways.

Application Field

The 74LCXR2245WMX is ideally suited for applications such as bidirectional bus switch and data line receiver/drivers. It can also be used in I/O application, such as parallel communication interface, electrical and optical transceiver, memory circuits, and multiplexers. This device is also capable of driving a wide variety of standard bus structures, such as Terabit Interconnect Bus (TIBS), Fast Ethernet, and Fibre Channel.

Working Principle

The 74LCXR2245WMX is composed of four non-inverting non-buffered receivers and drivers. These receivers/drivers are designed to be configured as independent logic paths, connected together by external circuitry. The receivers on each side of the device receive and pass signals up to the speed of 2.5GHz with a 5V input signal, making it ideal for high speed applications. The drivers are individually enabled by the output enable (OE) pins located between the receivers and the drivers. When an OE pin is enabled (low voltage), it causes the signal to be outputted. On the input side, signals are level shifted by two capacitor networks per half of the device. This level shifting process is necessary in order to ensure that the signal is received by the logic path.

I/O Characteristics

The 74LCXR2245WMX has 4 separate IO characteristics: two input fields (VIH, VIL) and two output fields (VOH, VOL). The VIH and VIL fields are the logic levels of the signal coming into the device, and the VOH and VOL fields are the logic levels of the signal coming out of the device.

The VIH field is the minimum high level input voltage when the device is enabled. This is usually 2.0V for the 74LCXR2245WMX. The VIL field is the minimum low level input voltage when the device is enabled. This is typically 0.8V for the 74LCXR2245WMX. The VOH field is the minimum high level output voltage when the device is enabled. This is usually 4.2V for the 74LCXR2245WMX. The VOL field is the minimum low level output voltage when the device is enabled. This is typically 0.4V for the 74LCXR2245WMX.

Power Supply and Max. Input Currents

The 74LCXR2245WMX operates from a single 5V power supply and has a max. input currents of 8mA at 25°C and a max. output current of 20mA at 25°C. Additionally, it has a max. power dissipation of 740mW. The device also has max. power supply currents of 5mA and a max. power supply voltage of 7V.

Packaging

The 74LCXR2245WMX comes in a small 8-pin narrow body, surface mount house. The housing is constructed of a ceramic material with a copper trace. This type of construction helps keep the device free from EMI/RFI interference. The device also has ESD protection to ensure reliable operation in harsh operating environments.

Conclusion

The 74LCXR2245WMX is an ideal logic device for high-speed logic applications. It is designed for bidirectional non-inverting logic and provides link between high-speed logic buses and card level logic pathways. With its compact 8-pin packaging, low power dissipation, low input/output currents, and ESD protection, the 74LCXR2245WMX is an easy choice for logic applications.

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