PCA9511ADMR2G

Signal Buffers, Repeaters, Splitters Overview

The PCA9511ADMR2G is a bidirectional I2C and SMBus buffer manufactured by onsemi, designed for hot-swappable applications. It operates within a supply voltage range of 2.7 V to 5.5 V and supports clock frequencies up to 400 kHz. The device features built-in rise time accelerators with a threshold of 0.6 V and pre-charges SDA and SCL lines to 1 V during insertion. Key electrical parameters include a maximum power dissipation of 609 mW, a typical operating supply current of 1 mA, and propagation delays of 66 ns and 170 ns. It utilizes an open-drain input/output configuration and is housed in an 8-pin Micro-8 surface-mount package.

Signal Buffers, Repeaters, Splitters Feature Summary

• Provides bidirectional buffering for SDA and SCL lines to prevent signal degradation during hot-plugging events.
• Integrates control circuitry that isolates the card from the backplane until bus idle conditions or stop commands are detected.
• Includes digital enable inputs and open-drain ready outputs to manage connection states and low-power modes.

Signal Buffers, Repeaters, Splitters Applications

• Hot-swappable I/O card insertion into live backplanes
• I2C bus buffering in multi-controller systems
• SMBus standard mode interface protection

Signal Buffers, Repeaters, Splitters Procurement Notes

Verify component authenticity through authorized distribution channels due to potential counterfeit risks. Confirm RoHS compliance status via official datasheets before integration. Check for obsolescence notices as lifecycle status may affect long-term availability. Ensure packaging specifications match assembly requirements. Validate pinout compatibility with existing PCB layouts.

Signal Buffers, Repeaters, Splitters Selection Notes

Select this component when designing systems requiring safe hot-plug capabilities for I2C or SMBus networks. Ensure the application voltage falls within the 2.7 V to 5.5 V operational range. Verify that the Micro-8 package fits the available board space. Consider the 400 kHz frequency limit for high-speed data transmission needs. Evaluate ESD protection ratings against environmental exposure levels.

Signal Buffers, Repeaters, Splitters Part Context

This part belongs to the PCA9511 family of I2C buffers developed by NXP Semiconductors and now distributed by onsemi. It serves as a specialized interface solution for maintaining bus integrity during dynamic system reconfiguration. The device addresses common challenges in modular electronics where components must be added or removed without powering down the entire system.

Signal Buffers, Repeaters, Splitters Replacement Considerations

Public confirmed substitute part numbers: PCA9511ADP,118; PCA9511AD.