onsemi

MC74LCX245DTR2  

Buffers, Drivers, Receivers, Transceivers

MC74LCX245DTR2 Description

The MC74LCX245DTR2 from onsemi is an 8-bit bidirectional transceiver designed for low-voltage (2V to 5.5V) digital systems. Packaged in a 20-pin TSSOP and supplied in Tape & Reel (TR), this device is part of the 74LCX series, offering non-inverting data transmission with 24mA output drive capability (both high and low). It features bidirectional data flow controlled by a direction pin (DIR), making it ideal for bus isolation and data routing in mixed-voltage environments. Though marked as obsolete, it remains relevant for legacy designs due to its low power consumption, 5V-tolerant inputs, and REACH compliance.

MC74LCX245DTR2 Features

• Wide Voltage Range (2V–5.5V): Compatible with 3.3V and 5V systems, enabling seamless interfacing.
• High Drive Strength (24mA): Supports robust signal integrity in bus-heavy applications.
• Bidirectional Operation: DIR pin controls data flow, simplifying bus management.
• 5V-Tolerant Inputs: Allows safe connection to higher-voltage logic without level shifters.
• Low Power Consumption: Optimized for battery-operated or energy-sensitive designs.
• Surface-Mount (TSSOP): Compact footprint suits space-constrained PCBs.
• MSL 1 (Unlimited): No baking required prior to reflow, easing assembly.

MC74LCX245DTR2 Applications

• Bus Interface Circuits: Isolates and buffers data buses in microcontrollers or FPGAs.
• Mixed-Voltage Systems: Bridges 3.3V and 5V logic domains (e.g., legacy industrial controls).
• Portable Electronics: Low-voltage operation suits handheld devices and IoT sensors.
• Automotive/Industrial Modules: Reliable performance in harsh environments (with proper PCB design).
• Data Routing: Used in multiplexers or signal switches for test equipment.

Conclusion of MC74LCX245DTR2

The MC74LCX245DTR2 excels in bidirectional data transfer with low-voltage flexibility and strong drive capability, making it a pragmatic choice for legacy or cost-sensitive designs. While obsolete, its 5V tolerance, compact packaging, and ease of integration ensure continued utility in mixed-voltage systems, bus isolation, and portable electronics. Engineers should evaluate alternatives for new designs but may leverage this IC for repairs or backward compatibility.

MC74LCX245DTR2 Documents

Download datasheets and manufacturer documentation for MC74LCX245DTR2