SN74GTLPH1645DGGR Integrated Circuits (ICs)

Output Signal:	GTLP
Base Part Number:	74GTLPH1645
Supplier Device Package:	56-TSSOP
Package / Case:	56-TFSOP (0.240", 6.10mm Width)
Mounting Type:	Surface Mount
Features:	--
Operating Temperature:	-40°C ~ 85°C (TA)
Data Rate:	--
Output Type:	Tri-State, Non-Inverted
Series:	74GTLPH
Input Signal:	LVTTL
Channels per Circuit:	8
Number of Circuits:	2
Channel Type:	Bidirectional
Translator Type:	Mixed Signal
Part Status:	Active
Packaging:	Tape & Reel (TR)

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Logic - Translators, Level Shifters

The SN74GTLPH1645DGGR device is a high-performance dual-channel level-shift translator for low-voltage, lower-power applications.It is a member of the Texas Instruments SN74GTL series of integrated circuits. The SN74GTLPH1645DGGR device facilitates translation between two voltages that differ by 2.5V or more. As an example, the bidirectional level crossing of 1.8V and 3.3V interfaces is readily achieved.The SN74GTLPH1645DGGR device features independent direction control, an input logic latch, and guarded inputs to protect against bus contention. The guard pins can be used either directly or with an optional pull-up or pull-down resistor. The device is designed to operate with a single supply voltage, and each ohmic, p-channel MOSFET-based translator segment operates from 1.8V to 3.6V.It has a wide variety of uses, from power regulation and voltage adaptation, to logic level shifting and bidirectional communication. In addition, the versatility of the SN74GTLPH1645DGGR devices make them suitable for a wide range of applications requirying low voltage and low power.

Working Principle

The SN74GTLPH1645DGGR device works by providing an independent, low-power, continuous current supply for each translator segment. The device is designed with p-channel MOSFET switches, which allow the driven terminal of each translation segment to be configured to either a high (Vdd) or low state (GND) depending on the logic state of the corresponding input. The device operates in two distinct states - active and inactive. During active operation, the input logic state is latched, allowing it to remain in the same state even when the driving signal is removed. When inactive, the input latch is reset and the driving signal is required to maintain the desired state. In addition, each device has an optional guard input that can be used either directly or with a pull-up or pull-down resistor to protect against external voltage swings.

Application Fields

The SN74GTLPH1645DGGR device has a wide range of applications, especially in the area of low voltage, low power level shifting. Examples of applications include:

• Bidirectional level conversion between 1.8V and 3.3V interfaces
• Interface level conversion between devices of different process nodes
• Voltage regulator power systems
• Serial bus level shifting and level crossing
• Remote sensing and communication systems
• Power line signal isolation and signal management

The SN74GTLPH1645DGGR device is particularly well suited for portable applications, where ultra-low power consumption is key to device longevity. In addition, its reduced package count makes it ideal for space-constrained applications where size is a factor. Combined with easy operation and excellent accuracy, these features make it well suited for a variety of logic level translation requirements.

Conclusion

The SN74GTLPH1645DGGR device is a versatile, low-power, dual-channel translator designed for low voltage applications. Its wide range of applications and its ease of use make it an attractive option, especially in portable operations and space-constrained applications. Combined with its features of TTL-level accuracy, independent direction control, and guarded input protection, it is an excellent choice for level shifters, voltage adaptation, and logic level crossing.

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