PCA9306DCURE4

Translators, Level Shifters Overview

The PCA9306DCURE4 is a dual bidirectional I2C-bus and SMBus voltage-level translator manufactured by Texas Instruments. It operates with VCCA from 1.0V to 3.6V and VCCB from 1.8V to 5.5V, enabling translation between these ranges without direction control pins. The device features an enable input for high-impedance isolation when disabled. It supports standard-mode, fast-mode, and fast-mode plus I2C protocols within an 8-pin VSSOP package.

Translators, Level Shifters Feature Summary

• Bidirectional voltage translation capability between low-voltage (1.0V–3.6V) and higher-voltage (1.8V–5.5V) domains without requiring explicit direction control signals.
• Integrated enable input allows switching the translator on or off, providing high-impedance isolation between ports when the device is disabled.
• Low on-state resistance minimizes propagation delay, supporting high-speed communication standards including Fast-mode Plus I2C.

Translators, Level Shifters Applications

• Interfacing 1.8V or 3.3V logic controllers with 5V peripheral devices on I2C buses.
• Connecting mixed-voltage systems where different components operate at distinct supply levels.
• SMBus applications requiring voltage level shifting between varying power rails.

Translators, Level Shifters Procurement Notes

Verify the specific suffix 'E4' against the manufacturer's official documentation to confirm it denotes a lead-free or RoHS-compliant variant of the standard PCA9306DCUR. Ensure the ordering part number matches the exact package and environmental specifications required for your design, as suffixes often indicate manufacturing or compliance differences rather than functional changes.

Translators, Level Shifters Selection Notes

Select this component when bidirectional level shifting is required between 1.0V–3.6V and 1.8V–5.5V domains. It is suitable for designs needing automatic direction detection and an enable pin for bus isolation. Consider the 8-pin VSSOP package constraints and ensure pull-up resistors are appropriately sized for the target bus speed and capacitance.

Translators, Level Shifters Part Context

The PCA9306 belongs to Texas Instruments' NanoStar family of voltage translators. It is designed specifically for I2C and SMBus interfaces, offering a compact solution for multi-voltage systems. Unlike bus buffers, it translates levels while active but isolates only when disabled, making it distinct from devices like the PCA9509.

Translators, Level Shifters Replacement Considerations

The PCA9306DCUR is the primary equivalent part number. Verify if the 'E4' suffix indicates a specific environmental or packaging update in the latest datasheet revision before substituting.