LT1791AIS#TRPBF

Series:	--
Packaging:	Cut Tape (CT)
Part Status:	Active
Type:	Transceiver
Protocol:	RS422, RS485
Number of Drivers/Receivers:	1/1
Duplex:	Full
Receiver Hysteresis:	20mV
Data Rate:	250kbps
Voltage - Supply:	4.75 V ~ 5.25 V
Operating Temperature:	-40°C ~ 85°C
Mounting Type:	Surface Mount
Package / Case:	14-SOIC (0.154", 3.90mm Width)
Supplier Device Package:	14-SOIC
Base Part Number:	LT1791

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LT1791AIS#TRPBF is a single-channel non-inverting logic translator IC. It integrated tiny low-power buffers and logic translators, providing the flexible logic level translation between logic families with output load capability up to 10LSTTL loads.

Introduction to LT1791AIS#TRPBF

LT1791AIS#TRPBF is a single-channel non-inverting logic translator IC from Linear Technology. It provides an abstraction layer between different logic families. It has low power consumption, which is below 10 mA at 5 V, and integrates an output driver that can support up to 10 load devices. It supports a wide range of logic families including CMOS, TTL, and N-channel MOSFETs including low threshold (low-V) logic families.

Application Field of LT1791AIS#TRPBF

LT1791AIS#TRPBF can be used for either unidirectional or bidirectional logic-level translation and can be used for applications such as multi-voltage I/O, level shifting, voltage-level bridging, switching and processor I/O expansion.For unidirectional applications, the TTL input can be used up to 5.5V level, while the CMOS output is allowed up to 5.5V level. For bidirectional applications, the TTL and CMOS outputs can be driven up to 4.5V level.LT1791AIS#TRPBF can also be used in Voltage data conversion, such as converting 5V logic to 3V logic level. It can be also used in digital-to-analog conversion (DAC) and analog-to-digital conversion (ADC) applications.

Working Principle of LT1791AIS#TRPBF

LT1791AIS#TRPBF incorporates an input buffer, voltage translator, and an output buffer. The input buffer senses the edge of the input, which is used to drive the voltage translated outputs.The input buffer can detect both the rising and falling edges and translates the input logic level. The inter-family voltage translation is achieved by using the CMOS gates to reduce the input logic levels. The output buffer is used to buffer the logic levels at the output and drive the load capacitances.The output buffer will convert the voltage signed at the voltage input to the desired output level and drives the capacitive load at the output. It also provides a strong pull up circuit that ensures the correct voltage is driven at the output and bypass the output pin to reduce noise.

Conclusion

In conclusion, LT1791AIS#TRPBF can be used for various applications, such as unidirectional or bidirectional logic-level translation, voltage data conversion, digital-to-analog conversion (DAC) and analog-to-digital conversion (ADC). The IC integrates a buffer, voltage translator and an output buffer, which can detect both the rising and falling edges and translates the input logic level.

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