74LVTH16646MEA

Series:	74LVTH
Packaging:	Tube
Part Status:	Obsolete
Logic Type:	Transceiver, Non-Inverting
Number of Elements:	2
Number of Bits per Element:	8
Input Type:	--
Output Type:	3-State
Current - Output High, Low:	32mA, 64mA
Voltage - Supply:	2.7 V ~ 3.6 V
Operating Temperature:	-40°C ~ 85°C (TA)
Mounting Type:	Surface Mount
Package / Case:	56-BSSOP (0.295", 7.50mm Width)
Supplier Device Package:	56-SSOP
Base Part Number:	74LVTH16646

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Introduction

The 74LVTH16646MEA is a logic device manufactured by Texas Instruments and majority of its applications are related to level-shifting, voltage translation, and buffer-output drivers. Moreover, this logic device is widely used in data exchange between two integrated circuits working with diverse voltage standards; having two channel bidirectional optoelectronic couplers, with each channel buffered from the other by using high speed CMOS logic.

Application field

74LVTH16646MEA is generally used in many diverse applications due to its wide range of utilities; ranging from voltage level translation to opto-coupled fiber-optic signaling applications. The level shifting property of the device allows it to interface with diverse logic standards along with ECL, such as TTL, 5V CMOS, PECL and standard CMOS logic. Due to its multi-channel capabilities, it can significantly reduce the cost and complexity of I/O ports in a system by acting as a link between existing design architectures and those which work on different voltage levels. Furthermore, the opto-electronic coupler- output buffered driver The 646 provides a low cost solution for the physical isolation in small form factor applications.

Working Principle

The two optoelectronic outputs present in the device work on complementary light-emitting diode (LED) technology, providing high voltage data transmission with significantly lower power dissipation and crosstalk levels. An integrated logic inverter is included for each side of the device, which allows for data latching for two-way or blind transfer.Moreover, logic inputs 1, 2 and 4 (address pins) of the logic device should be connected to a low enough logic level to enable data transfer while the logic level at inputs 3 and 5 (status pins) can be left open to remain in a high impedence state; which further allows the use of a hand-shaking protocol.The output driver can drive a positive or a negative current 2mA per each LED.

Conclusion

From the discussion above, it is clear that the 74LVTH16646MEA is a logic device with multiple applications such as level-shifting, voltage translation, and opto-electronic data exchange. It works by latching data for two-way or blind transfer with the help of integrated logic inverters and supporting a hand-shaking protocol. This device is widely used in many applications due to its low power dissipation, crosstalk levels, and small form factor.

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