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CPCI102BR Datasheet(PDF) 1 Page - California Micro Devices Corp |
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CPCI102BR Datasheet(HTML) 1 Page - California Micro Devices Corp |
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1 / 8 page  © 2005 California Micro Devices Corp. All rights reserved. 02/28/05 430 N. McCarthy Blvd., Milpitas, CA 95035-5112 ● Tel: 408.263.3214 ● Fax: 408.263.7846 ● www.calmicro.com 1 CMCPCI102B CompactPCI® Backplane Interface Features • CompactPCI® standards compliant • Allows CompactPCI System Cards to be used in any Slot • Provides termination for up to ten channels • Provides a series switch in each channel • Supports hot-swap capability • Very low capacitance load on each line • Industrial temperature range • 28-pin TSSOP package • Lead-free version available Applications • Redundant System CompactPCI® cards • Hot-swap CompactPCI cards • Industrial PCs • Telecom/Datacom equipment • Instrumentation • Computer Telephony • Real-time machine control Product Description The CMCPCI102BT/BR is a 10-channel backplane interface/termination IC specifically designed for Com- pactPCI redundant system-slot cards. The CMCPCI102BT/BR allows CompactPCI boards to interface to the backplane and provides the versatility to use system cards in any slot (system or peripheral). Per the CompactPCI specification, the CMCPCI102BT/ BR provides a 10 Ω termination resistor for each chan- nel to terminate the transmission line stub on the board. An integral series switch and associated control signal (SW_EN) permits connection/disconnection of the channel, so that the device side of the circuit may be isolated from the backplane side. The CompactPCI standard requires system boards to be hot-swappable. To accommodate this requirement, the CMCPCI102BT/BR features a switched 10k Ω resis- tor connected to the 1V Precharge Supply Voltage. If the precharge enable pin (P_EN) is asserted, then the 10k Ω pull-up resistors are connected to precharge the circuits. In addition, a system board requirement mandates either a 1.0k Ω pull-up resistor or a 2.7kΩ resistor con- nected to VIO. CompactPCI slot cards must work in either 3.3V or 5V systems, hence the need for both 2.7k Ω and 1kΩ resistors. If the 3_EN pin is logic high, the 2.7k Ωresistor is used as the pull-up. If the 5_EN pin is logic high, the 1k Ω resistor is used. The CMCPCI102BT/BR integrates all these functions in a low-profile 28-pin TSSOP package and is available with optional lead-free finishing. Simplified Electrical Schematic *One of 10 parallel channels is shown. 1V 5_EN 3_EN VIO B1-B10* A1-A10* CompactPCI Device Side Backplane Side P_EN SW_EN For all Enable signals: Logic 0 = switch open Logic 1 = switch closed RS 10 Ω RPU1 10k Ω SWPU1 SWPU2 SWPU3 RPU2 2.7k Ω RPU3 1k Ω SWS |
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