To minimize noise and ensure reliable operation, it's recommended to follow a star-grounding scheme, keep the device away from high-current paths, and use a solid ground plane. Additionally, route the clock and data lines as differential pairs, and keep them away from other noisy signals.
For the differential clock and data lines, use a 100-ohm differential termination resistor at the receiving end, and ensure that the traces are impedance-matched to minimize reflections. You can also use a termination network with a 50-ohm series resistor and a 50-ohm shunt resistor to the ground.
The DS1742-70+ can support clock frequencies up to 100 MHz, but it's recommended to operate at 50 MHz or lower to ensure reliable operation and minimize power consumption.
To ensure proper operation, power up the VCC supply before the VPP supply, and power down the VPP supply before the VCC supply. Also, ensure that the VCC supply is stable and within the recommended operating range before applying the VPP supply.
The recommended operating temperature range for the DS1742-70+ is -40°C to +85°C. However, it's essential to ensure that the device is operated within the recommended temperature range to maintain reliability and performance.
DS1742-70+ datasheet
by Maxim Integrated Products
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