PI6ULS5V9511B

Description

The PI6ULS5V9511B is a hot-swappable I2 C-bus and SMBus buffer that allows I/O card insertion into a live backplane without corrupting the data and clock buses. Control circuitry prevents the backplane from connecting to the card until a stop command or bus idle occurs on the backplane without bus contention on the card.
When the connection is made, the PI6ULS5V9511B provides bidirectional buffering, which keeps the backplane and card capacitances isolated. The PI6ULS5V9511B rise-time accelerator circuitry allows the use of weaker DC pullup currents while still meeting
rise-time requirements. The PI6ULS5V9511B incorporates a digital ENABLE input pin, which enables the device when asserted HIGH and forces the device into a low-current
mode when asserted LOW. The PI6ULS5V9511B also incorporates an open-drain READY output pin, which indicates that the backplane and card sides are connected
together (HIGH) or not (LOW). During insertion, the PI6ULS5V9511B SDA and SCL lines
are pre-charged to 1.1V to minimize the current required to charge the parasitic capacitance of the chip.

Feature(s)

• Bidirectional Buffer for SDA and SCL Lines Increases
  Fan Out
• Prevents SDA and SCL Corruption During Live Board
  Insertion and Removal from Backplane
• Isolates Input SDA and SCL Lines From Output
• Compatible with I2C, I2C Fast Mode, and SMBus Standards (up to 400kHz Operation)
• Built-in Rise-Time Accelerators on all SDA and SCL
• Wide Supply Voltage Range: 2.7V to 5.5V
• Active HIGH ENABLE Input
• Active HIGH READY Open-Drain Output
• High-Impedance SDA and SCL pins for VCC = 0V
• 1.1V Pre-Charge on all SDA and SCL Lines
• Supports Clock Stretching and Multiple Master
  Arbitration/Synchronization
• ESD Protection Exceeds 4000V HBM per JESD22-A114
• Totally Lead-Free & Fully RoHS Compliant 
• Halogen and Antimony Free. “Green” Device 
• For automotive applications requiring specific change
  control (i.e. parts qualified to AEC-Q100/101/200, PPAP
  capable, and manufactured in IATF 16949 certified
  facilities), please contact us or your local Diodes
  representative.
  https://www.diodes.com/quality/product-definitions/
• Packages (Pb-free and Green):
  
  • MSOP-8 (U),
  • SOIC-8 (W)