PI6ULS5V9517AZEEX

Signal Buffers, Repeaters, Splitters Overview

The PI6ULS5V9517AZEEX is a CMOS integrated circuit designed for I2C-bus and SMBus applications, functioning as a level translating repeater. It provides bidirectional buffering for serial data (SDA) and clock (SCL) lines across two ports with distinct supply voltage ranges: Port A operates from 0.8 V to 5.5 V, while Port B operates from 2.2 V to 5.5 V. The device supports Standard-mode and Fast-mode devices up to 400 kHz, accommodates multiple masters, and enables bus extension by isolating capacitance. It features an active HIGH enable input, open-drain outputs, and ESD protection exceeding 8 kV HBM.

Signal Buffers, Repeaters, Splitters Feature Summary

• Provides bidirectional level translation between low voltage (down to 0.8 V) and higher voltage (2.2 V to 5.5 V) domains.
• Supports arbitration and clock stretching across the repeater for robust I2C and SMBus communication.
• Features powered-off high-impedance pins to prevent bus contention when power is removed.
• Includes an active HIGH enable input to isolate buses during system power-up or idle states.

Signal Buffers, Repeaters, Splitters Applications

• Extending I2C bus length in mixed-voltage systems
• Isolating bus capacitance to accommodate more I2C devices
• Connecting 0.8 V logic devices to 3.3 V or 5 V I2C buses

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the ordering suffix 'ZEEX' corresponds to the TDFN2x3-8 package and tape/reel packaging configuration. Confirm RoHS compliance and lead-free status requirements against project specifications. Ensure the design accounts for the exposed center pad thermal connection on the ZE package for proper operation.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component when interfacing between a low-voltage domain starting at 0.8 V and a higher voltage domain requiring a minimum of 2.2 V. Ensure the application requires bidirectional buffering for both SDA and SCL lines. Verify that the operating frequency does not exceed 400 kHz, considering propagation delays introduced by the repeater.

Signal Buffers, Repeaters, Splitters Part Context

This part belongs to the PI6ULS5V9517A family of level translating I2C/SMBus repeaters manufactured by Diodes Incorporated. The specific suffix 'ZEEX' denotes the TDFN2x3-8 package variant supplied in tape and reel format. Other variants include MSOP-8 and SOIC-8 packages.

Signal Buffers, Repeaters, Splitters Replacement Considerations

Direct pin-to-pin replacements within the same family include PI6ULS5V9517AUEX (MSOP-8) and PI6ULS5V9517AWEX (SOIC-8). Cross-package substitution requires verifying land pattern compatibility and thermal management requirements for the exposed pad.

Signal Buffers, Repeaters, Splitters FAQ

Can multiple PI6ULS5V9517A devices be connected in series?

Yes, multiple devices can be connected in series if Port A is connected to Port B. However, the number of devices is limited by repeater delay and maximum bus speed requirements.

What happens if the enable pin changes state during I2C operation?

Changing the enable state during bus operation may hang the bus or confuse I2C parts. The enable pin should only change state when the global bus and repeater port are in an idle state.

How does the device handle lock-up conditions?

The device features lock-up free operation. The B-side output low level is approximately 0.5 V, which prevents recognition issues when the input low condition is released.