Table of Contents Section 1 – New and Featured Products

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® Power Management Products [Hotswap, Power Sequencing, Systems & Battery Management] X51694 Low Cost System Bus Accelerator Product Highlights • Low Cost, Improved Version of Linear Technology’s LTC1694 Key Features • Active Terminator for SMBus and other 2WSB (2-wire Serial Bus) signals • Enhances System Bus Signal Rise Time • Increases bus capacity while guaranteeing data integrity • 2 mA rise time supply current • ESD protection on SDA and SCL pins • Wide operating voltage range: 2.7 V to 5.5 V • Small package - SOT23-5 Benefits • Ideal for systems using a large number of 2-wire serial bus components • Ideal for IPMI, ICMB, SMBus or 2WSBs (2-wire Serial Bus) mezzanine bus schemes that need active termination. • Target Applications: Servers, Data Acquisition, Routers, Battery Chargers, Portable Instrumentation, Notebook, PC, and Facilities Tracking Systems, ATCA, PICMG3.x, and PICMG2.x applications • Dramatically reduces rise time to maintain signal integrity for SMBus or 2-wire bus signals delayed by high capacitances caused by interconnects, backplane connections, excessive device loading or by long capacitive connections Application Example Description The SMBus accelerator (SMA) is designed to enhance 2 signal rise times according to SMBus specifications. The SMA is also compatible with the 2-wire bus. Enhancement of both data signals guarantees data integrity throughout the bus while improving slew rate and overall bus performance. The SMA incorporates an active pull-up design for maintaining data reliability and speed. Internal bus line level detectors monitor the two signal lines and trigger two bi-level hysteretic current sources at a specific switching threshold to speed up the rise time of the signal lines. While the signal lines are transitioning from low to high, 2 mA of current is sourced for slew rate enhancement. The SMA goes into low power standby mode during high to low transitions or steady state signal values. The SMA provides an essential function in SMBus applications because of multiple capacitances located throughout systems in the form of long interconnects and multiple device input capacitances. By incorporating SMA, systems using SMBus or 2-wire bus can reliably increase their bus load without the risk of data loss. Pin Configuration X51694 SOT-23 V CC 1 5 GND 2 NC 3 4 SMBus1 SMBus2 New & Featured Products Vcc SMBus1 SMBus2 X51694 GND Available: 2nd Half of 2004 BUS SIGNALS DATA CLK interconnect: SBS, PCI, compact PCI, PMCI, ACPI, ICMB, IPMI, IPMB, SMBus, 2-wire CLK IN CLK OUT DATA IN DATA OUT www.xicor.com 1–15
® Power Management Products [Hotswap, Power Sequencing, Systems & Battery Management] X80000/X80001 Family–Hot Swap and Smart Power Plug Sequencers Product Highlights • Power Communications. Manages power supply demand on the backplane-to-blades • Hotswap. Protection of circuits from hot voltages during backplane insertion/extraction • Sequencing. Provides power sequencing between DC-DC modules Key Features Integrates three major functions 1. Smart Power Plug —Intelligent board insertion allows verification of board and power supply resources prior to system insertion —Fault detection register records the cause of the faults —Soft extraction and Soft Re-Insertion —Power ID/Manufacturing ID memory (2kb of EEPROM) 2. Programmable power sequencing —Sequence up to 5 DC/DC converters —Four independent voltage enable pins —Four programmable time delay circuits 3. Hot swap controller —Programmable overvoltage and undervoltage protection —Programmable slew rate for external FET gate control —Electronic circuit breaker - Overcurrent detection and gate shut-off —Typically operates from -30V to -80V. Tolerates translents to -200V (limited by external components) Available packages —32-lead Quad No-lead Frame (QFN) Pin Configuration X80000/X80001 32-lead QFN Quad Package V DD VEE I GQ0 V I UV/OV GQ1 SENSE PWRGD GATE BATT-ON DRAIN FAR NA NC V A1 EE MRH V RGO 32 31 30 29 28 27 26 25 1 24 A0 V4GOOD 2 3 23 22 EN4 V3GOOD EN3 4 5 6 (7mm x 7mm) 21 20 19 V2GOOD 7 18 EN2 8 17 9 10 11 12 13 14 15 16 NC MRC WP RESET V1GOOD EN1 SCL SDA Benefits Smart Power • X80000 Allows the system to query the voltage, current, and board type before power is granted to the board being inserted • X80000 also monitors DC power distribution status on each board • Modular Power Distribution Design • -48V typically is distributed to downstream DC-DC modules (which produce 0.9VDC to 12VDC) • X80000 allows for up to Five DC-DC modules to be sequenced • Safety and Reliability • X80000 provides flexibility of design to deal with inrush currents and live voltages during insertion, normal operation, and extraction Description The X80000 contains three major functions: a power communications controller, a power sequencing controller, and a hotswap controller. The power communications controller allows smart power supply control via the backplane using the SMBus protocol. The system can check for voltage, current, and manufacturing ID compliance before board insertion. The power distribution network can monitor the status of the negative voltage supply, DC voltage supplies, and hardshort events by accessing the Fault Detection Register and General Purpose EEPROM of the device. Each device has a unique slave address for identification. The power sequencer controller time sequences up to five DC-DC modules. The X80000 allows for various hardwired configurations, either parallel or relay sequencing modes. The power good, enable and voltage good signals provide for flexible DC-DC timing configurations. Each voltage enable signal has a programmable delay. In addition, the voltage good signals can be monitored remotely via the fault detection register (thru the SMBus). Ordering Information Order Number OV UV1 UV2 Temp Range Package Part Mark X80000Q32I 74.9 42.4 33.2 I QFN 80000I X80001Q32I 68.0 42.4 33.2 I QFN 80001I See Product Family Tree on page 2-14 1–16
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