Electronic Components Datasheet Search |
|
PCA9515A Datasheet(PDF) 8 Page - Texas Instruments |
|
|
PCA9515A Datasheet(HTML) 8 Page - Texas Instruments |
8 / 24 page 9th Clock Pulse VOL of PCA9515A VOL of Master SCL SDA I2C BUS SLAVE 100 kHz 3.3 V PCA9515A 5 V SDA SCL I2C BUS MASTER 400 kHz SDA1 SCL1 SDA0 SCL0 EN SDA SCL BUS 0 BUS 1 PCA9515A SCPS150D – DECEMBER 2005 – REVISED JUNE 2014 www.ti.com 9 Application and Implementation 9.1 Typical Application A typical application is shown in Figure 3. In this example, the system master is running on a 3.3-V bus, while the slave is connected to a 5-V bus. Both buses run at 100 kHz, unless the slave bus is isolated, and then the master bus can run at 400 kHz. Master devices can be placed on either bus. Figure 3. Typical Application 9.1.1 Design Requirements The PCA9515A is 5.5-V tolerant, so it does not require any additional circuitry to translate between the different bus voltages. When one side of the PCA9515A is pulled low by a device on the I2C bus, a CMOS hysteresis-type input detects the falling edge and causes an internal driver on the other side to turn on, thus causing the other side also to go low. The side driven low by the PCA9515A typically is at VOL = 0.5 V. 9.1.2 Detailed Design Procedure Figure 4 and Figure 5 show the waveforms that are seen in a typical application. If the bus master in Figure 3 writes to the slave through the PCA9515A, Bus 0 has the waveform shown in Figure 4. This looks like a normal I2C transmission until the falling edge of the eighth clock pulse. At that point, the master releases the data line (SDA) while the slave pulls it low through the PCA9515A. Because the VOL of the PCA9515A typically is around 0.5 V, a step in the SDA is seen. After the master has transmitted the ninth clock pulse, the slave releases the data line. Figure 4. Bus 0 Waveforms 8 Submit Documentation Feedback Copyright © 2005–2014, Texas Instruments Incorporated Product Folder Links: PCA9515A |
Similar Part No. - PCA9515A |
|
Similar Description - PCA9515A |
|
|
Link URL |
Privacy Policy |
ALLDATASHEET.NET |
Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | 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 |