PCA9306YZTR

Translators, Level Shifters Overview

The PCA9306YZTR is a dual bidirectional I2C-bus and SMBus voltage-level translator manufactured by Texas Instruments. It operates with Vref(1) ranging from 1.0 V to 3.6 V and Vbias(ref)(2) from 1.8 V to 5.5 V, enabling translation between 1.0 V and 5 V without direction control pins. The device features an enable input that controls the switch state; when high, it connects SCL1/SDA1 to SCL2/SDA2 for bidirectional data flow, while low places ports in a high-impedance state. It supports standard-mode, fast-mode, and fast-mode plus I2C devices. Key electrical parameters include a maximum propagation delay of 1.2 ns, a supply voltage range of 1.2 V to 5.5 V, and an operating temperature range of -40°C to +85°C. It is housed in a DSBGA-8 package.

Translators, Level Shifters Feature Summary

• Dual bidirectional voltage translation capability for I2C and SMBus interfaces without requiring direction control pins
• Low on-state resistance switch design minimizes propagation delay during active translation
• Enable input allows isolation of bus sides via high-impedance state when deactivated

Translators, Level Shifters Applications

• Connecting I2C or SMBus devices operating at different voltage levels
• Systems requiring simultaneous operation of buses at 100 kHz and 400 kHz frequencies
• Embedded controllers interfacing with sensors or peripherals across voltage domains

Translators, Level Shifters Procurement Notes

Verify the specific manufacturer source, as NXP Semiconductors also produces the PCA9306 series. Confirm the DSBGA-8 package type matches the YZTR suffix requirements. Ensure the application voltage ranges align with the specified 1.0 V to 3.6 V and 1.8 V to 5.5 V limits. Check for RoHS compliance documentation relevant to the production batch.

Translators, Level Shifters Selection Notes

Select this component when low propagation delay is critical for high-speed I2C communication. It is suitable for designs needing physical isolation of bus capacitance only when disabled. Consider the DSBGA-8 package constraints for PCB layout. Verify compatibility with both standard and fast-mode plus protocols if mixed-frequency buses are present.

Translators, Level Shifters Part Context

This part belongs to the PCA9306 family of voltage translators. Unlike bus buffers such as the PCA9509, it does not provide continuous physical isolation of bus capacitance on both sides while active. It functions primarily as a level shifter with an enable feature for temporary isolation, distinguishing it from full buffer architectures.

Translators, Level Shifters Replacement Considerations

PCA9306DCUT (VSSOP-8 package)

Translators, Level Shifters FAQ

Does the PCA9306YZTR require a direction pin for operation?

No, the device allows bidirectional voltage translations without the use of a direction pin.

What happens when the enable input is low?

When the enable input is low, the translator switch turns off, creating a high-impedance state between the ports.