M48T18-100MH1 datasheet by STMicroelectronics

M48T18-100MH1 Frequently Asked Questions (FAQs)

• What is the maximum operating temperature range for the M48T18-100MH1?
  The M48T18-100MH1 can operate from -40°C to +85°C, but it's recommended to use it within the -20°C to +70°C range for optimal performance.
• How do I handle the power-on reset (POR) and voltage supervisor (VS) functions?
  The POR and VS functions are internally connected and ensure that the device is in a reset state during power-up. The VS function monitors the VCC voltage and keeps the device in reset until VCC reaches a minimum threshold (around 1.5V).
• What is the purpose of the VCCP pin, and how should I connect it?
  The VCCP pin is the power supply pin for the internal clock circuitry. It should be connected to the same power supply as the VCC pin, but it's recommended to add a decoupling capacitor (e.g., 100nF) between VCCP and GND to ensure noise reduction and stable operation.
• How do I implement a battery-backed RAM (BBR) configuration?
  To implement a BBR configuration, connect a battery to the VBAT pin, and ensure that the VCC pin is connected to a power supply that can be switched off. The device will automatically switch to battery power when VCC is removed, and the RAM contents will be preserved.
• What is the recommended clock frequency for the M48T18-100MH1?
  The recommended clock frequency for the M48T18-100MH1 is 100MHz, but it can operate up to 120MHz with a reduced voltage supply (e.g., 3.3V). However, it's essential to consult the datasheet for specific frequency and voltage combinations.