TC7MPB9327FK(EL)

Overview

The TC7MPB9327FK(EL) is a CMOS dual multiplexer/demultiplexer bus switch designed for low voltage and low power applications. It provides bidirectional level-shifting interfaces between nodes operating at different voltage levels, supporting VCCA from 1.65 V to 5.0 V and VCCB from 2.3 V to 5.5 V. The device features an active-low Output Enable (OE) pin that isolates the bus lines when high. It includes two independent channels with common select inputs, offering low on-resistance and protection against electrostatic discharge.

Feature Summary

• Supports bidirectional level shifting between arbitrary power supplies without restrictions on relative voltage magnitudes
• Features an active-low output enable control input for effective bus isolation
• Provides power-down protection and 5.5 V tolerance at the OE input
• Includes built-in electrostatic discharge protection for all inputs

Applications

• Bidirectional interface between systems operating at different voltage levels
• Multiplexing and demultiplexing data lines in digital circuits
• Level translation for general-purpose bus switches

Procurement Notes

Verify the specific package variant required, as the part number suffix indicates either TSSOP14 or VSSOP14. Confirm the active-low OE functionality aligns with system logic requirements, distinguishing it from the active-high OE variant. Ensure supply voltages remain within the specified ranges to maintain operational integrity and avoid exceeding absolute maximum ratings.

Selection Notes

Select this component when a dual-channel bus switch with bidirectional level-shifting capability is needed. The active-low OE control distinguishes it from similar devices with active-high enables. Consider the low on-resistance and ESD performance for robust signal transmission. Verify compatibility with the target voltage domains, specifically ensuring VCCA remains lower than VCCB.

Part Context

This device belongs to the TC7MPB9326/9327 series of CMOS digital integrated circuits. It shares architectural similarities with the TC7MPB9326 but differs in the polarity of its output enable control. Both variants utilize n-type MOSFET channels and are designed for low voltage operation, making them suitable for modern portable and low-power electronic systems requiring efficient bus management.

Replacement Considerations

The TC7MPB9326FK(EL) serves as a functional substitute but utilizes an active-high Output Enable pin instead of the active-low configuration found in the TC7MPB9327. Designers must account for this logical inversion in control circuitry when substituting one for the other.