PCA9522DP,118

Signal Buffers, Repeaters, Splitters Overview

The PCA9522DP,118 is a dual bidirectional bus buffer with hot insertion logic, manufactured by NXP Semiconductors. It supports I2C-bus, SMBus, and PMBus protocols. The device operates with a supply voltage (VCC) ranging from 2.7 V to 5.5 V and buffers bus voltages up to 10 V. Key electrical parameters include an operating frequency of 400 kHz, a typical delay time of 30 ns, and a fall time of 15 ns. Supply current is typically 9 mA during operation and 520 µA in standby mode. The undervoltage lockout threshold is 2.2 V, and the precharge voltage is typically 0.92 V. It is housed in an 8-lead TSSOP package.

Signal Buffers, Repeaters, Splitters Feature Summary

• Dual bidirectional unity gain isolating buffer for SCL and SDA lines
• Hot insertion logic prevents data corruption on live backplanes
• Supports level shifting between 1.8 V and 10 V bus voltages
• Enable function allows isolation of bus segments

Signal Buffers, Repeaters, Splitters Applications

• Backplane management and interconnect systems
• Telecommunications equipment including AdvancedTCA architectures
• Desktop and portable computers utilizing RAID controllers

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify the specific ordering suffix '118' corresponds to the TSSOP8 package variant when sourcing. Confirm that the component meets RoHS compliance requirements for the intended manufacturing process. Ensure the supplier provides valid traceability documentation for this NXP Semiconductors part number.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component when designing systems requiring hot-swappable I2C or SMBus connections without signal degradation. It is suitable for interfacing peripheral cards with varying supply voltages to a central backplane. Consider the 6 mA static pull-down capability and low noise susceptibility for high-reliability environments.

Signal Buffers, Repeaters, Splitters Part Context

This part belongs to the PCA9522 series of fast dual bidirectional bus buffers. The DP suffix specifically denotes the plastic thin shrink small outline package (TSSOP8) with an 8-lead configuration. It serves as a drop-in replacement for legacy buffers like the IES5502, though with a reduced maximum bus voltage limit.

Signal Buffers, Repeaters, Splitters Replacement Considerations

The PCA9522D is the SOIC-8 package equivalent within the same functional family. Verify pin compatibility and thermal characteristics if substituting packages. No other direct cross-model replacements are documented in the provided datasheet.