ltc4300-1 Linear Technology Corporation, ltc4300-1 Datasheet
ltc4300-1
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ltc4300-1 Summary of contents
Page 1
... DC pull-up currents while still meeting rise-time requirements. During insertion, the SDA and SCL lines are precharged minimize bus disturbances. The LTC4300-1 incorporates a CMOS threshold digital ENABLE input pin, which forces the part into a low current mode when driven to ground and sets normal operation when ...
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... GND .................................................... – 0 GND (LTC4300-2) ............................. – 0 CC2 SDAIN, SCLIN, SDAOUT, SCLOUT ................. – 0 READY, ENABLE (LTC4300-1) ....................... – 0 ACC (LTC4300-2) .......................................... – 0 Operating Temperature Range LTC4300-1C/LTC4300-2C ....................... LTC4300-1I/LTC4300-2I .................... – Storage Temperature Range ................. – 125 C Lead Temperature (Soldering, 10 sec) ...
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... Note 4: Guaranteed by design, not subject to test. Note total capacitance of one bus line in pF. B voltage, as shown in CC LTC4300-1/LTC4300-2 MIN TYP MAX 1 2 0.3 • V 0.5 • V CC2 CC2 0.5 • V 0.7 • V CC2 0.1 1 ...
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... LTC4300-1/LTC4300 TYPICAL PERFOR A CE CHARACTERISTICS I vs Temperature (LTC4300-1) CC 3.0 2 5.5V CC 2.8 2.7 2.6 2 2.7V CC 2.4 2.3 2.2 –50 – TEMPERATURE ( Temperature PULLUPAC 2. –50 – TEMPERATURE ( 100 4300-1/2 G01 75 100 4300-1/2 G03 Input – Output t vs Temperature ...
Page 5
... ENABLE/V (Pin 1): Chip Enable Pin/Card Supply Volt- CC2 age. For the LTC4300-1, this is a digital CMOS threshold input pin. Grounding this pin puts the part in a low current (<1 A) mode. It also disables the rise-time accelerators, disables the bus precharge circuitry, drives READY low, isolates SDAIN from SDAOUT and isolates SCLIN from SCLOUT ...
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... LTC4300-1/LTC4300-2 W BLOCK DIAGRA (LTC4300-1) SLEW RATE DECTECTOR SDAIN 6 CONNECT SLEW RATE DECTECTOR SCLIN 3 CONNECT + – + 0.55V / – CC 0.45V CC UVLO 95 s DELAY ENABLE 2-Wire Bus Buffer and Hot Swap Controller 2mA 2mA BACKPLANE-TO-CARD CONNECTION CONNECT ENABLE 100k RCH1 1V PRECHARGE ...
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... BACKPLANE-TO-CARD CONNECTION CONNECT 100k RCH1 1V PRECHARGE 100k RCH2 2mA 2mA BACKPLANE-TO-CARD CONNECTION STOP BIT AND BUS IDLE 0.5 A 20pF 0.5pF LTC4300-1/LTC4300-2 SLEW RATE DECTECTOR CONNECT 100k RCH3 100k RCH4 SLEW RATE DECTECTOR + CONNECT – + – CONNECT CONNECT RD QB ...
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... LTC4300-1/LTC4300-2 U OPERATIO Start-Up When the LTC4300 first receives power on its V either during power-up or during hot swapping, it starts in an undervoltage lockout (UVLO) state, ignoring any activ- ity on the SDA and SCL pins until V CC the LTC4300-2, the part also waits for V 2V ...
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... V to provide the pull-up. This feature is available for the CC LTC4300-1 only. ENABLE Low Current Disable (LTC4300-1) Grounding the ENABLE pin disconnects the backplane side from the card side, disables the rise-time accelera- tors, drives READY low, disables the bus precharge cir- cuitry and puts the part in a near-zero current state ...
Page 10
... LTC4300, which is less than 10pF. Figure 5 shows the LTC4300 CompactPCI figuration. Connect V CompactPCI power supply hot swap circuits and connect ENABLE to the short “board enable” pin filtered UVLO circuit ...
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... Figure 7 shows the LTC4300 PCI application, where all of the pins have the same length. In this case, connect an RC series circuit on the I/O card between V ENABLE ...
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... 10k 10k BD_SEL SDA SCL NOTE: APPLICATION ASSUMES BUS CAPACITANCES WITHIN “PROPER OPERATION” REGION OF FIGURES 3 AND 4 Figure 5. Hot Swapping Multiple I/O Cards into a Backplane Using the LTC4300 CompactPCI System POWER SUPPLY HOT SWAP ENABLE SDAIN SCLIN POWER SUPPLY ...
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... V CC SDAIN SCLIN C2 0.01 F POWER SUPPLY HOT SWAP 5 SDAIN SCLIN C4 0.01 F POWER SUPPLY HOT SWAP 5 SDAIN SCLIN C6 0.01 F LTC4300-1/LTC4300-2 I/O PERIPHERAL CARD 0.01 F 10k 10k 10k V CC2 SDAOUT LTC4300-2 SCLOUT U1 ACC GND I/O PERIPHERAL CARD R10 ...
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... CONNECTOR BACKPLANE 10k 10k SDA SCL NOTE: APPLICATION ASSUMES BUS CAPACITANCES WITHIN “PROPER OPERATION” REGION OF FIGURES 3 AND 4 Figure 7. Hot Swapping Multiple I/O Cards into a Backplane Using the LTC4300 PCI System BACKPLANE CONNECTOR BACKPLANE V CC2 R1 R2 10k 10k V CC ...
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... TYP 0.53 0.015 1.10 (.021 .006) (.043) DETAIL “A” MAX SEATING PLANE 0.22 – 0.38 (.009 – .015) LTC4300-1/LTC4300-2 2-WIRE SYSTEM 0. LTC4300-1 10k 10k V CC ENABLE SDAOUT SCLOUT SDAIN SDA1 SCLIN READY SCL1 GND 0.52 (.206 REF 3 ...
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... C Fan Speed Controller ThinSOT is a trademark of Linear Technology Corporation. Linear Technology Corporation 16 1630 McCarthy Blvd., Milpitas, CA 95035-7417 (408) 432-1900 FAX: (408) 434-0507 V CC_LOW C2 R3 0.01 F 10k V CC ENABLE SDAOUT LTC4300-1 SDAIN SCLOUT U1 SCLIN READY GND Figure 10. System with Disparate V Voltages 0.01 F 0.01 F 10k ...