 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
LTC4310IMS-1-TRPBF Datasheet(PDF) 11 Page - Linear Technology |
|
||||||||||||||||||||||||||||||
LTC4310IMS-1-TRPBF Datasheet(HTML) 11 Page - Linear Technology |
|
|
11 / 20 page  LTC4310-1/LTC4310-2 431012f applicaTions inForMaTion Figure 4. SCL1 Rising Waveform of SCL1 for Application Circuit Shown in Figure 1 Figure 5. 100kHz SCL Waveforms for Application Circuit Shown in Figure 1 Bus Rising Edge Waveform When all external pull-downs on SCL1 (Figure 1) turn off, the SCL1 rising waveform will resemble that shown in Figure 4. The LTC4310-1 senses that SCL1 is rising and transmits a message to the other LTC4310-1 to release SCL2 high. During the transmission, the first LTC4310-1 also drives SCL1 to 0.35V, so that when the transmission is complete, both buses will rise simultaneously from 0.35V at a rate of (0.35 • VCC)/900ns. This functionality minimizestheeffectiveskewbetweenthetwobuses.When SCL1 reaches 0.35 • VCC, the LTC4310-1 deactivates its rise rate regulation circuitry. The bus then rises with a time constant of (RBUS • CBUS) until it reaches 0.45 • VCC, at which point the IBOOST rise time accelerator pull-up current is activated. Figure 5 shows SCL1 and SCL2 for an entire 100kHz switching cycle. Because the LTC4310-1 regulates the bus rise rate to (0.35 • VCC)/900ns, the 5V bus signal rises more quickly than the 3.3V bus signal. Both buses reach (0.35 • VCC) in approximately 900ns, so the effective skew betweenthebusesisnearlyzero.TheLTC4310-2functions the same as the LTC4310-1, except the controlled rise rate is limited to (0.35 • VCC)/300ns. 1V/DIV 200ns/DIV BUS RC 431012 F04 SCL1 SET TO 0.35V DURING TX RISE TIME ACCELERATOR ACTIVE 0.35 • VCC 900 ns dV/dt = 1V/DIV 2µs/DIV SCL1 SCL2 431012 F05 Start-Up, Data and Clock Hot Swap Circuitry The LTC4310 contains power-on reset (POR) circuitry that sets the data and clock pins in a high impedance state and deactivates the transmit circuitry until the EN voltage is high, the device is not in thermal shutdown and the VCC voltage is above 2.4V. After the LTC4310 exits the POR state, it activates its transmit circuitry and communicates its SDA, SCL logic states across the barrier to the other LTC4310 via its TXP and TXN pins. The receive circuitry remains deactivated for an additional 900µs after the LTC4310 exits POR. The 900µs filter time is required for the LTC4310 to charge its RXP and RXN pins totheirDCbiasvoltage,assuminga0.01µFcommon-mode noise filtering capacitor at the center-tap of the secondary side of the external transformer. When the filter time has elapsed, the LTC4310 activates its receive circuitry and decodes the messages it receives on its RXP and RXN pins, registering the logic state of the remote I2C bus. Whenboththelocalandremotetwo-wirebusesare“quiet” (i.e., no data transactions are occurring on either bus), the LTC4310 then drives its READY pin low to indicate that it has linked the logic state of the local I2C bus with the logic state of the remote I2C bus. This means that the LTC4310 will now drive its SDA and SCL pins to the logic state of the remote I2C bus, as specified by the messages it receives on RXP and RXN. The LTC4310 considers a two-wire bus |
Similar Part No. - LTC4310IMS-1-TRPBF |
|
Similar Description - LTC4310IMS-1-TRPBF |
|
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.COM |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
