74LCX16244TTR

Overview

The 74LCX16244TTR is a low voltage CMOS 16-bit bus buffer with non-inverted, 3-state outputs. It utilizes sub-micron silicon gate and double-layer metal wiring C2MOS technology for high-speed operation at 3.3V. The device features 5V tolerant inputs and outputs, allowing direct interfacing with 5V signal environments. Operating voltage ranges from 2.0V to 3.6V, with data retention down to 1.5V. Propagation delay is 4.5ns maximum at VCC = 3V. Outputs provide symmetrical impedance with |IOH| = IOL = 24mA minimum at VCC = 3V. It includes power-down protection on all inputs and outputs.

Feature Summary

• Provides 5V tolerance on both inputs and outputs for seamless interfacing with 5V logic systems.
• Features power-down protection circuits on all input and output pins to prevent excessive current draw during power-off states.
• Delivers balanced propagation delays (tPLH ≈ tPHL) ensuring consistent timing performance across the 16 channels.

Applications

• Used as a 3-state memory address driver in digital systems.
• Interfaces low-voltage 3.3V logic devices with 5V signal environments.
• Functions as a high-speed bus buffer for parallel data transmission lines.

Procurement Notes

Verify the specific ordering suffix 'TTR' corresponds to the Tape and Reel packaging format in the TSSOP-48 package. Confirm that the procurement channel provides the original STMicroelectronics datasheet to validate the 5V tolerance specifications and operating voltage range of 2.0V to 3.6V. Ensure the component lot matches the required temperature grade for your application environment.

Selection Notes

Select this component when designing systems requiring 16-bit wide data buses with 3-state control capabilities. It is suitable for applications needing high speed at low voltages while maintaining compatibility with legacy 5V interfaces. Consider its 24mA drive capability and ESD protection ratings if the design involves long traces or harsh electrical environments.

Part Context

This part belongs to the 74LCX series of low-voltage CMOS logic devices manufactured by STMicroelectronics. It is functionally compatible with the standard 74 series 16244 but operates at lower supply voltages. The TTR suffix indicates it is supplied in a tape and reel configuration within a TSSOP-48 package, designed for surface-mount assembly processes.

Replacement Considerations

Check for pin-compatible alternatives within the same 74LCX family or other manufacturers offering 16-bit bus buffers with 5V tolerance. Verify that any substitute maintains the 2.0V to 3.6V operating range and similar propagation delay characteristics to ensure circuit timing integrity.