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LTC4301 Datasheet(PDF) 8 Page - Linear Technology |
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LTC4301 Datasheet(HTML) 8 Page - Linear Technology |
8 / 12 page 8 LTC4301 4301fb APPLICATIO S I FOR ATIO they make contact. CS is a short pin that is pulled up when not connected. This is to ensure that the connection between the backplane and the cards data and clock busses is not enabled until the transients associated with live insertion have settled. Figure 4 shows the LTC4301 in a CompactPCI TM configu- ration. The LTC4301 receives its VCC voltage from one of the long “early power” pins. Because this power is not switched, add a 5 Ω to 10Ω resistor between VCC of the LTC4301 and the connector VCC pin. Establishing early power VCC ensures that the 1V precharge voltage is present at SDAIN and SCLIN before they make contact. The CS pin is driven by the CompactPCI’s BD_SEL# pin using a short pin. This is to ensure that a connection is not enabled until the transients associated with live insertion have settled. Figure 5 shows the LTC4301 in a PCI application where all of the pins have the same length. In this case, an RC filter circuit on the I/O card with a product of 10ms provides a R13 10k R12 10k R14 10k I/O PERIPHERAL CARD N SDAIN SCLIN LTC4301 VCC GND CARDN_SCL CARDN_SDA SDAOUT SCLOUT READY SDAIN SCLIN VCC GND SDAOUT SCLOUT READY CS SDAIN SCLIN VCC GND SDAOUT SCLOUT READY 4301 F03 R9 10k R8 10k R10 10k I/O PERIPHERAL CARD 2 LTC4301 CARD2_SCL CARD2_SDA R5 10k R4 10k R6 10k I/O PERIPHERAL CARD 1 LTC4301 CARD_SCL CARD_SDA R1 10k VCC VCC2 R2 10k BACKPLANE BACKPLANE CONNECTOR SDA BD_SEL SCL 0.01 µF R3 10k 5.1 Ω 5.1 Ω 5.1 Ω R7 10k R11 10k 0.01 µF 0.01 µF CS CS Figure 4. Inserting Multiple I/O Cards into a Live Backplane Using the LTC4301 in a CompactPCI System CompactPCI is a trademark of the PCI Industrial Computer Manufacturers Group. |
Similar Part No. - LTC4301_15 |
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Similar Description - LTC4301_15 |
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