74LVC1T45GM,115

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74LVC1T45GM is a five channel translation device designed to convert TTL/CMOS levels to the low voltage level of 0.7V to 1.8V. It belongs to the IC family group of Logic–Translators, Level Shifters. This type of device is useful when the signal being routed between two electronic systems needs to be translated as the signals perhaps available at one system may not be supported adequately at the other. This type of device works on the basis of signal level shifting.

The 74LVC1T45GM consists of five small devices sharing the identical SOT553 package. It has a single voltage supply VCC within the range of 1.65V - 3.6V. Its input and output logic thresholds are I/O type compatible. Its ground current value is about 25uA and quiescent state power supply current is about 75uA. The chip has a reliable and fast switching time from low to high 1.2ns and from high to low 0.65ns. Its Operational temperature range is from -40°C to +125°C.

A few of its typical application fields are wireless communication, portable electronic equipment, battery powered systems, cellular phones, automotive and automotive related applications. This device can be used to carry signals between TTL/CMOS voltage levels and Low voltage level (0.7V to 1.8V) interface. This type of device is most often used to protect the input buffers of a low-power-consumption system, which is designed to work on a lower voltage. Moreover, it can also be used to translate signals between systems where the voltage levels mismatch each other.

The architecture of the 74LVC1T45GM consists of five low-voltage-compatible bidirectional translators constructed with an alternating series of NFET and PFET transistors and resistors. Pull-up resistor at the output enables the output to generate a "high" signal if either no input is present, or if the input transmits a "low" signal. The translated output voltage level changes according to the input. Five such NMOS bidirectional translators are cascaded and terminated in an inverter. A chip select input is provided to enable the translators.

In conclusion, the 74LVC1T45GM is a suitable device for translating signals from TTL/CMOS voltage levels to the Low voltage level (0.7V to 1.8V) interface. With a fast switching time, low ground current and quiescent power supply current, this makes it an ideal choice for portable electronic equipment, cellular phones and related applications, where low power consumption is required. Its architecture contains five cascaded, low-voltage-compatible bidirectional translators, making it a suitable choice for level shifting and translation needs.

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