For the purpose of this application brief, a simplified ADAS domain controller block diagram shows the logic and translation use cases. See Simplified Block Diagram for ADAS Domain Controller as an example. Each red block has an associated use-case document. Table 1 and Table 2 list links for more information. To see a complete block diagram, see the interactive online end equipment reference diagram for ADAS Domain Controller.
Each use case is linked to a separate short document that provides additional details including a block diagram, design tips, and part recommendations. The nearest block and use-case identifiers are listed to match up exactly to the use cases shown in Figure 1.
Nearest Block | Use-Case Identifier | Use Case |
---|---|---|
Battery Input Protection | Power Good Combination | Combine Power Good Signals |
Sensors Data Processing | Increase I/O | Increase Inputs on a uC |
Fusion and Object Data Processing | Timed Reset | Reset a System for a Short Time |
Diagnostics and Monitoring | Combine Error Signals | Combine Error Signals |
Nearest Block | Use-Case Identifier | Use Case |
---|---|---|
Raw Data Sensor Interface | I2C Translation | Translate Voltages for I2C |
Fusion and Object Data Memory | GPIO Translation | Translate Voltages for GPIO Pins |
System controllers can use GPIO pins to reset other components if a fault is detected; however, system controllers generally cannot reset themselves or their entire system. By using a monostable multivibrator, the system controller can reset the entire system.
Part Number | Automotive Qualified | VCC Range | Type | Features |
---|---|---|---|---|
SN74LVC1G125-Q1 | ✓ | 1.65 V – 5.5 V | Single buffer with 3-state outputs | Standard CMOS inputs Inverting OE signal; see '1G126 for non-inverting OE signal. |
SN74LVC1G07-Q1 | ✓ | 1.65 V – 5.5 V | Single buffer with open-drain outputs | Schmitt-trigger inputs Inputs are over-voltage tolerant; signals can exceed VCC. |
SN74LVC1G08-Q1 | ✓ | 1.65 V – 5.5 V | Single 2-input AND gate | Schmitt-trigger inputs Supports partial-power-down with Ioff circuitry, disabling outputs. |
For more devices with Schmitt trigger input architecture, see the online parametric tool which can be sorted by the desired voltage, output current, and other features.
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