LTC4300-2 Linear Technology, LTC4300-2 Datasheet
LTC4300-2
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LTC4300-2 Summary of contents
Page 1
... Both the backplane and card may be powered with supply voltages ranging from 2.7V to 5.5V, with no contraints on which supply voltage is higher. The LTC4300-2 also replaces the READY pin with a digital CMOS input pin, ACC, which enables and disables the rise-time accelerator currents. ...
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... W ABSOLUTE AXI U RATI GS (Note 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 .................... – www.DataSheet4U.com Storage Temperature Range ................. – ...
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... The denotes the specifications which apply over the full operating = 2.7V to 5.5V, unless otherwise noted CONDITIONS Positive Transition on SDA,SCL 2.7V, CC Slew Rate = 1.25V/ s (Note 2), LTC4300-2, ACC = 0.7 • 2.7V CC2 CC2 LTC4300-2 LTC4300-2 LTC4300-2 LTC4300-2 10k SDA, SCL 3.3V (Note 3), ...
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... LTC4300-1/LTC4300-2 TYPICAL PERFOR A CE CHARACTERISTICS I vs Temperature (LTC4300-1) CC 3.0 2.9 2.8 2.7 2.6 www.DataSheet4U.com 2.5 2.4 2.3 2.2 –50 –25 0 TEMPERATURE ( Temperature PULLUPAC –50 –25 0 TEMPERATURE ( 5. 2. 100 4300-1/2 G01 2. 100 4300-1/2 G03 Input – Output t ...
Page 5
... SDAIN from SDAOUT and isolates SCLIN from SCLOUT. Drive ENABLE all the way to V operation. Connect ENABLE to V being used. For the LTC4300-2, this is the supply voltage for the devices on the card I resistors from SDAOUT and SCLOUT to this pin ...
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... LTC4300-1/LTC4300-2 W BLOCK DIAGRA SDAIN 6 www.DataSheet4U.com SCLIN 3 + – + 0.55V / – CC 0.45V CC UVLO 95 s DELAY ENABLE 1 6 (LTC4300-1) 2-Wire Bus Buffer and Hot Swap 2mA SLEW RATE DECTECTOR BACKPLANE-TO-CARD CONNECTION CONNECT CONNECT ENABLE 100k RCH1 1V PRECHARGE 100k RCH2 2mA SLEW RATE ...
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... CONNECTION CONNECT 100k RCH1 1V PRECHARGE 100k RCH2 2mA SLEW RATE DECTECTOR BACKPLANE-TO-CARD CONNECTION CONNECT STOP BIT AND BUS IDLE 0.5 A 20pF 0.5pF LTC4300-1/LTC4300-2 2mA SLEW RATE DECTECTOR CONNECT CONNECT 100k RCH3 100k RCH4 2mA SLEW RATE DECTECTOR + CONNECT – + – ...
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... SDA and SCL pins until V the LTC4300-2, the part also waits for V 2V. This ensures that the part does not try to function until it has enough voltage to do so. ...
Page 9
... Start-Up section) before reconnecting the two sides. This feature is available for the LTC4300-1 only ACC Boost Current Enable (LTC4300-2) + 0.15V), or 0.65V to Users having lightly loaded systems may wish to disable IH(MIN) the rise-time accelerators. Driving this pin to ground turns off the rise-time accelerators on all four SDA and SCL pins ...
Page 10
... LTC4300-1/LTC4300 APPLICATIO S I FOR ATIO Resistor Pull-Up Value Selection The system pull-up resistors must be strong enough to provide a positive slew rate of 1.25V the SDA and SCL pins, in order to activate the boost pull-up currents during rising edges. Choose maximum resistor value R ...
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... ENABLE product of 10ms provides a filter to prevent the LTC4300-1 from becoming activated until the transients associated with hot swapping have settled. Figure 8 shows the LTC4300 application where the user has a custom connector with pins of three different lengths available. Making V that all other pins are firmly connected before V receives any voltage ...
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... LTC4300-1/LTC4300 APPLICATIO S I FOR ATIO BACKPLANE CONNECTOR BACKPLANE 10k 10k www.DataSheet4U.com 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 ...
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... BD_SEL www.DataSheet4U.com V CC SDA SCL R1 R2 10k 10k NOTE: APPLICATION ASSUMES BUS CAPACITANCES WITHIN “PROPER OPERATION” REGION OF FIGURES 3 AND 4 Figure 6. Hot Swapping Multiple I/O Cards into a Backplane Using the LTC4300 CompactPCI System W U POWER SUPPLY HOT SWAP 5 SDAIN SCLIN C2 0.01 F ...
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... BACKPLANE V CC2 R1 R2 10k 10k V CC SDA SCL NOTE: APPLICATION ASSUMES BUS CAPACITANCES WITHIN “PROPER OPERATION” REGION OF FIGURES 3 AND 4 Figure 8. Hot Swapping Multiple I/O Cards into a Backplane Using the LTC4300-2 with a Custom Connector I/O PERIPHERAL CARD 1 R3 100k V ENABLE LTC4300-1 SDAIN U1 ...
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... LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.102mm (.004") MAX Information furnished by Linear Technology Corporation is believed to be accurate and reliable. However, no responsibility is assumed for its use. Linear Technology Corporation makes no represen- tation that the interconnection of its circuits as described herein will not infringe on existing patent rights. LTC4300-1/LTC4300-2 2-WIRE SYSTEM 2 C2 0.01 F ...
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... SCLOUT U1 SCLIN READY GND Figure 10. System with Disparate 0.01 F 0.01 F 10k 10k CC2 SDAIN SDAOUT LTC4300-2 SCLIN SCLOUT U1 ACC GND Figure 11 3.3V Level Translator TM C Fan Speed Controller in ThinSOT www.linear.com 10k 10k 10k SDA2 SCL2 4300-1/2 F08 Voltages ...