74ALVC16245DL,112

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Logic devices form the foundation of many technology systems. These devices, often referred to as logic gates, are responsible for enabling and disabling communications and circuit functions. As logic device technology has developed, engineers have adapted and modified these devices to better suit applications with diverse performance requirements. The 74ALVC16245DL is a 16-bit transceiver with integrated voltage-level shifting, dual outputs and an integrated termination resistor. This design allows the transceiver to perform in greater electrical isolation than competitive designs.

Application Field

The 74ALVC16245DL, also known as an "octal" transceiver, is particularly well-suited for applications where transmission between two logic regions, including differing voltage levels, is required. It is also used to provide data paths for fast, low-voltage, bidirectional data communication systems. The device is suitable for data communication bus services that require low system power, as well as applications that require voltage level shifting.

More specifically, the device is designed for applications such as optical transmitters and receivers, high-speed processors, multiplexers and demultiplexers, low-voltage LCD data drivers, monitor controllers, digital audio and video interfaces, digital signal processor (DSP) interfaces, TTL and CMOS gate interfaces and power control applications.

Working Principle

The 74ALVC16245DL operates like a digital switch with multiple control inputs. It is designed to transfer and receive data simultaneously, in both directions between a TTL/CMOS compatible system and a low-voltage differential signal bus. The device has a fast ‘on’ response time and a low-power consumption. The integrated terminator resistor provides improved signal integrity for data transmission applications.

The device features an active-low output-enable input that is used to control the output pins. An input-enable input can also be used to control the input pins. The 74ALVC16245DL has an open-drain output that can easily be connected to the active-low input of other devices. In addition, the outputs are capable of sinking up to 24 mA and can support up to 10 MHz of data. This device also supports two bi-directional transmitter/receiver channels.

The device has three states of operation: a high-impedance state, a low-impedance state and a disabled state. The device will transition between these states depending on the input levels. The high-impedance state is used when outputs are disabled. The low-impedance state is used when the outputs are enabled and logical levels are present at the inputs. In the disabled state, the device will not respond to logic input levels and the output pins are disabled.

The integrated level shifter ensures that the output pins do not enter a high impedance state even if the input levels are too low to trigger the output enable input. This is particularly beneficial in applications where matching the drive strength of the input interface is critical.

Conclusion

The 74ALVC16245DL is an octal transceiver device with integrated voltage-level shifting and termination resistors. It is well-suited for applications such as optical transceivers, multiplexers and demultiplexers, digital signal processors, and power control. The integrated terminator resistors provide improved signal integrity and the level shifter ensures drive strength matching. The device supports two bi-directional transmission and reception channels, with an active-low output enable input and a low-power consumption.

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