Texas Instruments provides a recommended PCB layout in the datasheet, but it's essential to follow good layout practices, such as keeping the input and output traces separate, using a solid ground plane, and minimizing parasitic inductance. Additionally, it's recommended to use a 4-layer PCB with a dedicated power plane and a dedicated ground plane.
To ensure reliable operation over the entire operating temperature range (-40°C to 125°C), it's crucial to follow proper thermal design and layout practices. This includes providing adequate heat sinking, using thermal vias, and ensuring good airflow around the device. Additionally, it's recommended to derate the device's power dissipation according to the temperature derating curve provided in the datasheet.
The critical timing parameters for the SM72442MT/NOPB include the input rise and fall times, output rise and fall times, and the minimum input pulse width. To ensure these parameters are met, it's essential to carefully design the input and output circuits, taking into account the device's internal capacitance, resistance, and inductance. Additionally, it's recommended to use a signal integrity analysis tool to simulate and verify the timing parameters.
The SM72442MT/NOPB has built-in ESD protection, but it's still essential to follow proper ESD handling and protection practices during manufacturing, testing, and operation. This includes using ESD-safe materials, handling the device by the body or pins, and using ESD protection devices such as TVS diodes or ESD arrays.
The recommended power sequencing for the SM72442MT/NOPB is to power up the device in the following order: VCC, VDD, and then the input signals. The supply voltage requirements include a minimum voltage of 2.7V and a maximum voltage of 5.5V for VCC, and a minimum voltage of 1.65V and a maximum voltage of 3.6V for VDD. It's essential to ensure that the power supplies are stable and well-regulated to prevent device malfunction or damage.
SM72442MT/NOPB datasheet
by Texas Instruments
