AM26LS31CDR

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The AM26LS31CDR is a high-speed, current-mode line receiver integrated circuit primarily used in data communications applications. It features a differential input stage with an internal bandgap reference and a forward-biased photo-diode current source output stage. It can function as a line receiver for 10BASE-T, 100BASE-TX, 1000BASE-T, and 10GBASE-T Ethernet applications, and is designed to meet IEEE 802.3 electrical specifications. The AM26LS31CDR also provides a fail-safe feature which forces the output to a logic low state whenever the input signal is absent.

The AM26LS31CDR provides good immunity against EMI within a compact 8-pin package. The device features a wide operating temperature range of -40°C to +85°C and can be powered with a supply voltage range of 3.3V to 7V. It has an adjustable 5/12V logic threshold, as well as an adjustable high impedance detect state for detecting when the inputs exceed the 5/12V logic threshold.

In terms of its application field, the AM26LS31CDR is an ideal choice for Ethernet applications, with its compatibility with 10BASE-T, 100BASE-TX, 1000BASE-T, and 10GBASE-T standards ensuring that it can be used in a wide range of Ethernet networks. It can also be used in other power-sensitive applications as it requires very low power consumption of just 10mW. The device is commonly found in data communication systems, computer networks, and automation systems.

The AM26LS31CDR works by receiving differential current-mode input signals and converting them into single-ended TTL output signals. The device has two differential inputs (IN+ and IN-) and two single-ended TTL outputs (OUT+ and OUT-). The current-mode input signals enter the device through the two differential inputs and are compared to an internal threshold voltage, Vref. Depending on which input has the higher voltage level, the output of the device is set to either low or high.

The AM26LS31CDR also includes a forward-biased photo-diode current source to provide improved surge protection. This helps to prevent the device from being damaged by high-energy transients such as those caused by lightning strikes. The current source also helps to reduce reflections on the transmission line, improving the overall signal integrity.

In summary, the AM26LS31CDR is an efficient and cost-effective integrated circuit that can be used in a wide range of data communication, computer network, and automation applications. It features a differential input stage with an internal bandgap reference and a forward-biased photo-diode current source output stage which provides excellent surge protection and signal integrity. The device also has an adjustable 5/12V logic threshold, as well as an adjustable high impedance detect state for detecting when the inputs exceed the 5/12V logic threshold. The AM26LS31CDR is compact, low-power, and highly temperature tolerant, making it a great choice for many interface applications.

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