Electronic Components Datasheet Search |
|
PCA9545B Datasheet(PDF) 10 Page - NXP Semiconductors |
|
PCA9545B Datasheet(HTML) 10 Page - NXP Semiconductors |
10 / 28 page PCA9545A_45B_45C_7 © NXP B.V. 2009. All rights reserved. Product data sheet Rev. 07 — 19 June 2009 10 of 28 NXP Semiconductors PCA9545A/45B/45C 4-channel I2C-bus switch with interrupt logic and reset 7. Characteristics of the I2C-bus The I2C-bus is for 2-way, 2-line communication between different ICs or modules. The two lines are a serial data line (SDA) and a serial clock line (SCL). Both lines must be connected to a positive supply via a pull-up resistor when connected to the output stages of a device. Data transfer may be initiated only when the bus is not busy. 7.1 Bit transfer One data bit is transferred during each clock pulse. The data on the SDA line must remain stable during the HIGH period of the clock pulse as changes in the data line at this time will be interpreted as control signals (see Figure 10). 7.2 START and STOP conditions Both data and clock lines remain HIGH when the bus is not busy. A HIGH-to-LOW transition of the data line, while the clock is HIGH is defined as the START condition (S). A LOW-to-HIGH transition of the data line while the clock is HIGH is defined as the STOP condition (P) (see Figure 11). Fig 10. Bit transfer mba607 data line stable; data valid change of data allowed SDA SCL Fig 11. Definition of START and STOP conditions mba608 SDA SCL P STOP condition S START condition |
Similar Part No. - PCA9545B |
|
Similar Description - PCA9545B |
|
|
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 |