74LCX162244TTR

Overview

The 74LCX162244TTR is a low voltage CMOS 16-bit bus buffer with non-inverted outputs, manufactured using sub-micron silicon gate and double-layer metal wiring C2MOS technology. It operates within a supply voltage range of 2.0V to 3.6V, supporting data retention at 1.5V. The device features 5V tolerant inputs and outputs, ensuring compatibility with 5V signal environments. It includes power-down protection on all inputs and outputs, symmetrical output impedance, and balanced propagation delays. Integrated 26Ω series resistors in the outputs help reduce line noise in high-speed applications.

Feature Summary

• Features 5V tolerant inputs and outputs for interfacing between 3.3V and 5V systems.
• Includes power-down protection on inputs and outputs to prevent excessive current draw during power-off states.
• Incorporates 26Ω series resistors in the output paths to minimize line noise in high-speed designs.
• Provides symmetrical output impedance and balanced propagation delays for consistent signal timing.

Applications

• Used as a 3-state memory address driver.
• Interfaces 3.3V logic systems with 5V signal environments.
• Functions as a high-speed bus buffer in low-power applications.

Procurement Notes

Verify that the ordering suffix TTR corresponds to the Tape & Reel packaging format in the TSSOP-48 package. Confirm the specific grade (e.g., -4 or -5) matches the required operating temperature range, as specifications vary between industrial (-40°C to 85°C) and extended (-55°C to 125°C) ranges. Ensure input voltages do not exceed the absolute maximum ratings to avoid damage.

Selection Notes

Select this component when a 16-bit non-inverted bus buffer is required with 5V tolerance on both sides. It is suitable for applications needing low power consumption and high speed, such as memory addressing. Consider the integrated 26Ω series resistance for noise reduction. Verify that the TSSOP-48 package fits the board layout constraints and that the operating voltage range aligns with the system's VCC requirements.

Part Context

This part belongs to the 74LCX family of low-voltage CMOS logic devices from STMicroelectronics. It is pin and function compatible with the standard 74 series 162244 but offers improved performance at lower voltages. The LCX series is designed for high-speed operation with low power dissipation, making it ideal for modern portable and battery-operated electronic devices requiring interface between different voltage domains.

Replacement Considerations

Check for direct replacements like the 74LVC162244 or other 16-bit bus buffers from different manufacturers that maintain 5V tolerance and similar pinouts. Ensure any substitute supports the same TSSOP-48 package and meets the required propagation delay and current drive specifications.

FAQ

What is the purpose of the 26Ω series resistors in the outputs?

The 26Ω series resistors are integrated into the output paths to reduce line noise, which is beneficial in high-speed applications.

How does the device handle power-down conditions?

The device includes power-down protection on both inputs and outputs, preventing excessive current flow when the supply voltage is off.

Is the 74LCX162244 compatible with 5V systems?

Yes, the device features 5V tolerant inputs and outputs, allowing it to interface safely with 5V signal environments while operating at lower voltages.