Dual-Slot, Hot-Swap Controller Enables Safe Insertion and Removal of PCI Express Cards
SUNNYVALE, CA-November 23, 2004-Maxim Integrated Products
(NASDAQ: MXIM) introduces the MAX5946, a fully integrated, dual, hot-swap controller for PCI Express® (Peripheral Component Interconnect Express) hot-plug slots. The MAX5946 allows the safe insertion and removal of PCI-Express cards from live PCI-Express hot-plug slots.
The MAX5946 integrates many features that simplify design, and reduce board space and overall system cost. The device provides independent power control for +12V and +3.3V, and auxiliary +3.3V supply rails for two PCI-Express slots. The device integrates 0.24W power MOSFET switches for the +3.3V auxiliary supply rails, and can be controlled via the SMBus™ interface with an external I/O expander.
This hot-swap controller provides active inrush and overcurrent protection with programmable overcurrent timeout. Thermal shutdown protection is provided for each channel. Other features include power-good status indicators with power-on-reset, attention input switches with 4ms debounce, and FAULT-bar outputs for reporting overcurrent and thermal shutdown faults. The MAX5946L provides latched fault management, while the MAX5946A is available with auto-retry fault management.
The MAX5946A and MAX5946L are available in a small, 36-pin QFN package. These devices operate over the industrial temperature range (-40°C to +85°C). Prices start at $3.26 (1000-up, FOB USA).
PCI Express is a registered trademark of the PCI-SIG (Peripheral Component Interconnect).
SMBus is a trademark of Intel Corp.
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