Hot Swap Controller features I_C interface.
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Press Release Summary:
Model LTC4240 allows board to be safely inserted and removed from live CompactPCI® bus slot. It controls all 4 CompactPCI supplies by employing 2 external N-channel transistors for 3.3 and 5 V supplies, while 2 on-chip switches regulate ±12V supplies. Built-in 2-wire I_C compatible interface permits software control and monitoring of device functions as well as power supply status. Unit comes in 28-pin narrow SSOP package.
Original Press Release:
CompactPCI Hot Swap Controller Features I_C Interface
MILPITAS, CA - July 15, 2003 - Linear Technology introduces the LTC4240, an I_C Hot Swap(TM) controller that allows a board to be safely inserted and removed from a live CompactPCI® bus slot. The LTC4240 controls all four CompactPCI supplies by employing two external N-channel transistors for the 3.3V and 5V supplies, while two on-chip switches regulate the ±12V supplies. Electronic circuit breakers protect all four supplies against overcurrent faults and a Power Good output indicates when all of the supply voltages are within tolerance.
The LTC4240 has a built-in 2-wire I_C compatible interface that permits software control and monitoring of device functions as well as power supply status. It also gives the user the ability to turn the device On or Off, set the RESETOUT, turn on a status LED driver and ignore ±12V faults.
The part also provides a pre-charge bias for the I/O pins and combines the PCI_RST# signal with the HEALTHY# to make the LOCAL_PCI_RST# signal, and meets the tight PCI timing requirements, eliminating the need for external logic.
All of these features make the LTC4240 ideal for CompactPCI applications as it can oversee and manage the power supplies during live insertion and protect the cards from over-current faults.
The LTC4240 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 for 1,000-piece quantities.
Summary of Features: LTC4240
Allows Safe Board Insertion and Removal from a Live CompactPCI Backplane
I_C Compatible 2-Wire Interface
Precharge Output Biases I/O Pins During Card Insertion and Extraction
Controls 3.3V, 5V, ±12V supplies
Foldback Current Limit with Circuit Breaker
Local PCI_RST# Logic on Chip
Status LED Driver
Registers Individual Supply Faults
28-Pin SSOP Package
Company Background
Linear Technology Corporation was founded in 1981 as a manufacturer of high performance linear integrated circuits. Linear Technology products include operational, instrumentation and audio amplifiers; voltage regulators,power management devices, DC-DC converters and voltage references; comparators; monolithic filters; communications interface circuits; one-chip data acquisition sub-systems; pulse-width modulators and sample-and-hold devices; and high frequencydevices. Applications for Linear Technology's high performance circuits include wireless and broadband telecommunications infrastructure, cellular telephones, networking products and satellite systems, notebook and desk top computers, computer peripherals, video/multimedia, industrial and medical instrumentation, automotive electronics, factory automation, process control, military and space systems, and high-end consumer products including digital cameras, MP3 players and other electronic products.
READER SERVICE: Call toll-free 1-800-4-LINEAR (for literature only), or go to the company's web site: www.linear.com
