ZHCSQD8C July 2007 – April 2022 PCA9306-Q1
PRODUCTION DATA
- 1 特性
- 2 应用
- 3 说明
- 4 Revision History
- 5 说明（续）
- 6 Pin Configuration and Functions
-
7 Specifications
- 7.1 Absolute Maximum Ratings
- 7.2 ESD Ratings
- 7.3 Recommended Operating Conditions
- 7.4 Thermal Information
- 7.5 Electrical Characteristics
- 7.6 Switching Characteristics: Translating Down, VIH = 3.3 V
- 7.7 Switching Characteristics: Translating Down, VIH = 2.5 V
- 7.8 Switching Characteristics: Translating Up, VIH = 2.3 V
- 7.9 Switching Characteristics: Translating Up, VIH = 1.5 V
- 7.10 Typical Characteristics
- 8 Parameter Measurement Information
-
9 Detailed Description
- 9.1
Overview
- 9.1.1 Definition of threshold voltage
- 9.1.2 Correct Device Set Up
- 9.1.3 Disconnecting a Target from the Main I2C Bus Using the EN Pin
- 9.1.4 Supporting Remote Board Insertion to Backplane with PCA9306-Q1
- 9.1.5 Switch Configuration
- 9.1.6 Controller on Side 1 or Side 2 of Device
- 9.1.7 LDO and PCA9306-Q1 Concerns
- 9.1.8 Current Limiting Resistance on VREF2
- 9.2 Functional Block Diagram
- 9.3 Feature Description
- 9.4 Device Functional Modes
- 9.1
Overview
- 10Application and Implementation
- 11Power Supply Recommendations
- 12Layout
- 13Device and Documentation Support
- 14Mechanical, Packaging, and Orderable Information
9.1.4 Supporting Remote Board Insertion to Backplane with PCA9306-Q1
Another situation where PCA9306-Q1 is advantageous when using its enable feature is when a remote board with I2C lines needs to be attached to a main board (backplane) with an I2C bus such as in Figure 9-4. If connecting a remote board to a backplane is not done properly, the connection could result in data corruption during a transaction or the insertion could generate an unintended pulse on the SCL line. Which could glitch an I2C device state machine causing the I2C bus to get stuck.
Figure 9-4 An example of connecting a remote board to a main board (backplane)PCA9306-Q1 can be used to support this application because it can be disabled while making the connection. Then it is enabled once the remote board is powered on and the buses on both sides are IDLE.