MC74LVX245DTR2G

Overview

The MC74LVX245DTR2G is an octal bus transceiver from the LVX logic family, manufactured by onsemi. It operates within a DC supply voltage range of 2.0 V to 3.6 V and supports inputs up to 5.5 V. The device provides balanced propagation delays with typical values of 4.7 ns at 3.3 V and maximums of 11.5 ns across the operating temperature range of -40°C to +85°C. It features low quiescent current (max 40 µA) and 3-state outputs. The component is housed in a TSSOP-20 package.

Feature Summary

• Provides two-way asynchronous communication between data buses via dedicated Transmit/Receive direction control.
• Includes power-down protection on inputs to prevent excessive current draw during system power-off states.
• Features robust ESD protection exceeding 2000 V under Human Body Model testing conditions.

Applications

• Asynchronous communication interfaces between data buses
• Memory and memory mapping applications
• High-speed data transmission systems

Procurement Notes

Verify the specific ordering suffix 'DTR2G' confirms the TSSOP-20 package and tape-and-reel shipping configuration. Ensure compatibility with RoHS compliance requirements for lead-free manufacturing processes. Confirm that the 5 V-tolerant input specifications align with the target system's voltage levels to avoid interface issues.

Selection Notes

Select this component when an octal bidirectional transceiver with 5 V-tolerant inputs is required for low-voltage CMOS systems. Consider the TSSOP-20 package constraints and the 2.0 V to 3.6 V operating voltage range. Evaluate the need for power-down protection and high ESD immunity relative to other logic families.

Part Context

This part belongs to the MC74LVX245 series of advanced high-speed CMOS octal bus transceivers. The series is designed for low-power dissipation and pin-to-pin compatibility with standard logic families. The DTR2G designation specifically identifies the TSSOP-20 surface-mount variant supplied in a tape-and-reel format for automated assembly.

Replacement Considerations

Direct replacements include MC74LVX245DWR2G (SOIC-20 package) or MC74LVX245DW (SOIC-20 tube). Verify package dimensions and thermal characteristics when substituting between TSSOP and SOIC form factors.

FAQ

Can the MC74LVX245DTR2G be used to directly interface 5.0 V systems to 3.0 V systems?

No. A parasitic diode exists between the bus and VCC terminals, preventing direct interfacing of 5.0 V to 3.0 V systems without additional circuitry.

What happens if an I/O pin is forced while it is an active output?

Forcing a signal onto an I/O pin when it is functioning as an active output may cause damage to the device.