74LCXH16245TTR

Overview

The 74LCXH16245TTR is a low voltage CMOS 16-bit bus transceiver with 3-state outputs, manufactured by STMicroelectronics. It utilizes sub-micron silicon gate and double-layer metal wiring C2MOS technology for high-speed operation at 3.3V with lower power consumption compared to the 5V AC/ACT family. The device supports bidirectional asynchronous communication between data buses, controlled by DIR inputs. It features 5V tolerant inputs and outputs, allowing interfacing with 5V signal environments. Propagation delay is 4.5 ns max at VCC = 3V. Operating voltage range is 2.0V to 3.6V (with 1.5V data retention). It includes bus hold on both sides, power-down protection, and ESD immunity exceeding 2000V HBM.

Feature Summary

• Low voltage CMOS 16-bit bus transceiver with 3-state outputs
• 5V tolerant inputs and outputs for interfacing with 5V signal environments
• Bus hold provided on both sides to eliminate external pull-up or pull-down resistors
• Power-down protection on inputs and outputs

Applications

• Two-way asynchronous communication between data buses
• Low power and high speed 3.3V applications
• Interfacing with 5V signal environment

Procurement Notes

Verify the component is the 74LCXH16245TTR in TSSOP-48 package from STMicroelectronics. Confirm datasheet specifications match requirements: 16-bit, 3-state, 5V tolerant, 2.0V-3.6V operating voltage. Check for RoHS compliance and lead-free status if required. Ensure storage and handling follow ESD precautions due to CMOS technology.

Selection Notes

Select this component for designs requiring bidirectional data transfer between buses with different voltage levels, specifically 3.3V and 5V. Consider its low power consumption and high speed (4.5ns max propagation delay) for performance-critical applications. The integrated bus hold simplifies design by removing need for external resistors. Verify operating temperature range (-55°C to 125°C) meets environmental requirements.

Part Context

The 74LCXH16245 is part of STMicroelectronics' 74LCXH series of low voltage CMOS logic devices. This series offers high speed comparable to 5V AC/ACT families but with reduced power consumption. The 16245 variant specifically provides 16-bit bidirectional bus transceiving capability with 3-state outputs and 5V tolerance, making it suitable for system interconnects where voltage level shifting is necessary.

Replacement Considerations

Check for pin-compatible alternatives within the 74LCXH series or other manufacturers offering similar 16-bit bus transceivers with 5V tolerance. Verify electrical characteristics such as propagation delay, output current, and operating voltage range match or exceed original specifications. Ensure package type (TSSOP-48) and thermal characteristics are compatible with existing PCB layout.