PCA9517D,118

Signal Buffers, Repeaters, Splitters Overview

The PCA9517D,118 is a CMOS integrated circuit designed as a level translating I2C-bus repeater. It provides bidirectional buffering for both data (SDA) and clock (SCL) lines, enabling two buses with up to 400 pF capacitance on either side. The device translates voltage levels between a low-voltage A-side (0.9 V to 5.5 V) and a higher-voltage B-side (2.7 V to 5.5 V). It supports Standard mode and Fast mode I2C-bus devices, SMBus applications, arbitration, and clock stretching. The SDA and SCL pins are overvoltage tolerant to 5.5 V even when unpowered. The package is an 8-lead plastic small outline package (SO8), specifically SOT96-1.

Signal Buffers, Repeaters, Splitters Feature Summary

• Bidirectional buffering isolates capacitance and allows 400 pF on either side of the device
• Voltage level translation from 0.9 V to 5.5 V and from 2.7 V to 5.5 V
• Footprint and functional replacement for PCA9515/15A
• I2C-bus and SMBus compatible

Signal Buffers, Repeaters, Splitters Applications

• Extending I2C bus distance by buffering SDA and SCL lines
• Translating voltage levels between low voltage (down to 0.9 V) and higher voltage (up to 5.5 V) systems
• Isolating two halves of a bus for both voltage and capacitance management

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the specific ordering suffix

Signal Buffers, Repeaters, Splitters Selection Notes

Select the PCA9517D,118 when an SO8 package is required for space-constrained designs. Ensure the system operates within the specified temperature range of -40 °C to +85 °C. Confirm that the B-side supply voltage remains above 2.7 V while the A-side can operate down to 0.9 V. This component serves as a direct functional replacement for the PCA9515 and PCA9515A in existing layouts.

Signal Buffers, Repeaters, Splitters Part Context

The PCA9517 series includes variants such as the PCA9517DP (TSSOP8) and PCA9517ATP (HWSON). The 'D' suffix specifically denotes the SO8 plastic small outline package (SOT96-1). All variants share identical electrical characteristics and functionality, differing only in physical footprint and pin configuration. The PCA9517 acts as a bridge for I2C/SMBus networks requiring voltage translation and load isolation.

Signal Buffers, Repeaters, Splitters Replacement Considerations

The PCA9517D,118 is functionally equivalent to the PCA9515 and PCA9515A. For direct pin-compatible replacements in the same SO8 package, consider the PCA9515ADG or PCA9515ADGK. Note that the PCA9517 offers improved drive current on the A-side compared to the PCA9515.