CY7C128-55PC datasheet by Cypress Semiconductor

CY7C128-55PC Frequently Asked Questions (FAQs)

• What is the maximum operating temperature range for CY7C128-55PC?
  The maximum operating temperature range for CY7C128-55PC is 0°C to 70°C (commercial grade) and -40°C to 85°C (industrial grade).
• How do I handle power-up and power-down sequencing for CY7C128-55PC?
  It is recommended to power up the VCC supply before the VCCQ supply, and power down the VCCQ supply before the VCC supply to prevent latch-up and ensure proper operation.
• What is the recommended termination scheme for CY7C128-55PC?
  The recommended termination scheme for CY7C128-55PC is to use a 22-ohm series resistor on the output pins and a 47-ohm pull-up resistor on the input pins to ensure signal integrity and reduce noise.
• Can I use CY7C128-55PC in a 3.3V system?
  Yes, CY7C128-55PC is compatible with 3.3V systems, but it requires a 3.3V VCCQ supply and 3.3V tolerant inputs. Additionally, the output voltage levels may need to be adjusted using external resistors to ensure compatibility with 3.3V logic.
• How do I handle clock signal integrity for CY7C128-55PC?
  It is recommended to use a clock signal with a rise time of less than 1 ns and a fall time of less than 1 ns to ensure proper clock signal integrity. Additionally, the clock signal should be terminated with a 22-ohm series resistor and a 47-ohm pull-up resistor to reduce noise and signal reflections.