MC74LVXC3245DWR2

Translators, Level Shifters Overview

The MC74LVXC3245DWR2 is a dual-supply, octal configurable voltage interface transceiver manufactured by onsemi. It features an A port dedicated to a 3.0 V supply (VCCA range: 2.3 V to 3.6 V) and a B port configured to track the VCCB supply level (range: 3.0 V to 5.5 V). The device provides bidirectional data flow controlled by Transmit/Receive (T/R) and Output Enable (OE) inputs. Outputs are 3-state with source/sink capabilities up to 24 mA. Propagation delays range from 1.0 ns to 10.0 ns depending on direction and load conditions. It operates within a temperature range of -40°C to +85°C.

Translators, Level Shifters Feature Summary

• Configurable dual-supply architecture allowing the B port to track VCCB levels between 3.0 V and 5.5 V while the A port remains fixed at 3.0 V.
• Allows simultaneous floating of the B port I/O pins and VCCB pin when the OE input is High, supporting hot-swappable applications.
• Outputs capable of sourcing and sinking up to 24 mA with guaranteed simultaneous switching noise performance.
• Functionally compatible with the standard 74 series 245 devices.

Translators, Level Shifters Applications

• PCMCIA configurable I/O applications
• Real-time configurable I/O interfaces
• Interfaces between 3.0 V host systems and 3.0 V or 5.0 V card slots

Translators, Level Shifters Procurement Notes

Verify the specific ordering suffix for package type and reel specifications. Confirm that the G suffix indicates a lead-free package if required by assembly standards. Ensure the tape and reel quantity matches the production requirements. Check for RoHS compliance documentation. Validate the operating temperature range against system constraints.

Translators, Level Shifters Selection Notes

Select this component when interfacing a fixed 3.0 V logic domain with a variable 3.0 V to 5.0 V bus. The device is suitable for applications requiring rail-to-rail output swings on the B port. Consider the propagation delay limits for high-speed data transfer requirements. Verify that the 24 mA output drive current meets the load capacitance demands of the connected circuitry.

Translators, Level Shifters Part Context

This device belongs to the 74LVXC family of octal bus transceivers designed for low-voltage CMOS applications. It serves as a bridge between different voltage domains without requiring external level-shifting components. The dual-supply design simplifies power management in portable electronics where multiple voltage rails are present.

Translators, Level Shifters Replacement Considerations

The datasheet notes functional compatibility with the 74 series 245. Specific substitute part numbers are not provided in the official documentation.

Translators, Level Shifters FAQ

How does the device handle the B port when OE is High?

When the OE input is High, the device allows both the B port I/O pins and the VCCB voltage source pin to float simultaneously.

What determines the direction of data flow?

The Transmit/Receive (T/R) input determines the direction. An active-High T/R enables data flow from the A port to the B port, while an active-Low T/R enables flow from the B port to the A port.