DS12C887A datasheet by Maxim Integrated Products

DS12C887A Frequently Asked Questions (FAQs)

• What is the recommended power-up sequence for the DS12C887A?
  The recommended power-up sequence is to apply VCC first, followed by VBAT. This ensures that the internal voltage regulators are powered up correctly.
• How do I ensure that the DS12C887A is in a low-power state during battery backup?
  To minimize power consumption during battery backup, ensure that the CE (chip enable) input is low, and the SCLK (serial clock) input is inactive. This puts the device in a low-power state.
• What is the maximum frequency for the SCLK input?
  The maximum frequency for the SCLK input is 2 MHz. Exceeding this frequency may result in unreliable operation or damage to the device.
• How do I handle the case where the battery is completely discharged?
  In the event of a completely discharged battery, the DS12C887A will not retain its data. It is recommended to use a supervisory circuit to detect the battery voltage and prevent the device from operating below the minimum specified voltage.
• What is the purpose of the VIL (input low voltage) and VIH (input high voltage) specifications?
  The VIL and VIH specifications define the input voltage thresholds for the digital inputs of the DS12C887A. These specifications ensure that the device can correctly interpret the input signals and prevent incorrect operation.