Datasheet LTC4301 (Analog Devices) - 8
| Hersteller | Analog Devices |
| Beschreibung | Supply Independent Hot Swappable 2-Wire Bus Buffer |
| Seiten / Seite | 12 / 8 — APPLICATIO S I FOR ATIO |
| Dateiformat / Größe | PDF / 229 Kb |
| Dokumentensprache | Englisch |
APPLICATIO S I FOR ATIO
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Textversion des Dokuments
LTC4301
U U W U APPLICATIO S I FOR ATIO
they make contact. CS is a short pin that is pulled up when power VCC ensures that the 1V precharge voltage is not connected. This is to ensure that the connection present at SDAIN and SCLIN before they make contact. between the backplane and the cards data and clock The CS pin is driven by the CompactPCI’s BD_SEL# pin busses is not enabled until the transients associated with using a short pin. This is to ensure that a connection is not live insertion have settled. enabled until the transients associated with live insertion have settled. Figure 4 shows the LTC4301 in a CompactPCITM configu- ration. The LTC4301 receives its VCC voltage from one of Figure 5 shows the LTC4301 in a PCI application where all the long “early power” pins. Because this power is not of the pins have the same length. In this case, an RC filter switched, add a 5Ω to 10Ω resistor between VCC of the circuit on the I/O card with a product of 10ms provides a LTC4301 and the connector VCC pin. Establishing early CompactPCI is a trademark of the PCI Industrial Computer Manufacturers Group. BACKPLANE CONNECTOR BACKPLANE 5.1 I/O PERIPHERAL CARD 1 Ω VCC 0.01µF R4 R5 R6 VCC2 R3 10k 10k 10k R1 R2 10k 10k 10k BD_SEL CS VCC SDAOUT CARD_SDA SDA SDAIN LTC4301 SCLOUT CARD_SCL AGGERED CONNECTOR SCL SCLIN READY ST GND 5.1 I/O PERIPHERAL CARD 2 Ω 0.01µF R8 R9 R10 R7 10k 10k 10k 10k VCC CS SDAOUT CARD2_SDA SDAIN LTC4301 SCLOUT CARD2_SCL AGGERED CONNECTOR SCLIN READY GND ST • • • I/O PERIPHERAL CARD N 5.1Ω 0.01µF R12 R13 R14 R11 10k 10k 10k 10k VCC CS SDAOUT CARDN_SDA SDAIN LTC4301 SCLOUT CARDN_SCL AGGERED CONNECTOR SCLIN READY GND ST 4301 F03
Figure 4. Inserting Multiple I/O Cards into a Live Backplane Using the LTC4301 in a CompactPCI System
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U U W U APPLICATIO S I FOR ATIO
they make contact. CS is a short pin that is pulled up when power VCC ensures that the 1V precharge voltage is not connected. This is to ensure that the connection present at SDAIN and SCLIN before they make contact. between the backplane and the cards data and clock The CS pin is driven by the CompactPCI’s BD_SEL# pin busses is not enabled until the transients associated with using a short pin. This is to ensure that a connection is not live insertion have settled. enabled until the transients associated with live insertion have settled. Figure 4 shows the LTC4301 in a CompactPCITM configu- ration. The LTC4301 receives its VCC voltage from one of Figure 5 shows the LTC4301 in a PCI application where all the long “early power” pins. Because this power is not of the pins have the same length. In this case, an RC filter switched, add a 5Ω to 10Ω resistor between VCC of the circuit on the I/O card with a product of 10ms provides a LTC4301 and the connector VCC pin. Establishing early CompactPCI is a trademark of the PCI Industrial Computer Manufacturers Group. BACKPLANE CONNECTOR BACKPLANE 5.1 I/O PERIPHERAL CARD 1 Ω VCC 0.01µF R4 R5 R6 VCC2 R3 10k 10k 10k R1 R2 10k 10k 10k BD_SEL CS VCC SDAOUT CARD_SDA SDA SDAIN LTC4301 SCLOUT CARD_SCL AGGERED CONNECTOR SCL SCLIN READY ST GND 5.1 I/O PERIPHERAL CARD 2 Ω 0.01µF R8 R9 R10 R7 10k 10k 10k 10k VCC CS SDAOUT CARD2_SDA SDAIN LTC4301 SCLOUT CARD2_SCL AGGERED CONNECTOR SCLIN READY GND ST • • • I/O PERIPHERAL CARD N 5.1Ω 0.01µF R12 R13 R14 R11 10k 10k 10k 10k VCC CS SDAOUT CARDN_SDA SDAIN LTC4301 SCLOUT CARDN_SCL AGGERED CONNECTOR SCLIN READY GND ST 4301 F03
Figure 4. Inserting Multiple I/O Cards into a Live Backplane Using the LTC4301 in a CompactPCI System
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