The recommended layout and routing for the MAX696CWE+ involves keeping the input and output traces short and away from each other, using a solid ground plane, and placing decoupling capacitors close to the device. A 4-layer PCB with a dedicated power plane and a dedicated ground plane is recommended.
To ensure proper power-up and initialization, the MAX696CWE+ requires a power-on reset (POR) circuit to ensure that the internal registers are reset to their default state. A 10kΩ pull-up resistor on the EN pin and a 100nF decoupling capacitor on the VCC pin are recommended.
The MAX696CWE+ can sink up to 20mA per output pin and source up to 10mA per output pin. However, the total current sourced or sunk by all output pins should not exceed 100mA.
To troubleshoot issues with the MAX696CWE+, start by checking the power supply voltage, ensuring that it is within the recommended range. Then, verify that the EN pin is properly pulled up and that the input signals are within the recommended voltage range. Use a logic analyzer or oscilloscope to verify the output signals.
The MAX696CWE+ is compatible with both 3.3V and 5V logic levels. The input and output voltage levels are compatible with TTL and CMOS logic levels, making it suitable for use in a wide range of applications.
MAX696CWE+ datasheet
by Maxim Integrated Products
