Milpitas, Calif. - Linear Technology's I2C hot-swap controller, the LTC4240, controls all four CompactPCI sources using two external n-channel transistors for the 3.3- and 5-volt supplies, and two on-chip switches for regulating the plus/minus 12-V supplies. Electronic circuit breakers protect all four sources against overcurrent. A "power good" output indicates when all supplies are within operating tolerance. The two-wire I2C-compatible interface coordinates software control and monitoring of device functions and power supply status. The controller meets tight PCI timing requirements, eliminating the need for external logic, Linear said. It is offered in a 28-pin narrow SSOP package and is available for both commercial and industrial temperature ranges. Pricing starts at $4.25 each in lots of 1,000.
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