General Description

AK6921F is 1ch programmable output port IC, including EEPROM, Data Output Control, Low voltage malfunction prevention circuit and others.
The state that the power off maintains an initial value of the control because this IC builds EEPROM.
User can control digital output "H" or "L" by the interface using I²C bus.  The output port status etc. can be confirmed with the status register.
Moreover, the output below a regulated voltage can be stopped according to the power-supply voltage monitoring function.
AK6921F is effective to the electronic money in mobile phone control etc.

• Operating Voltage Range (VDD/VDDI) VDD=2.0V to 4.5V, VDDI=1.6V to 4.5V
• Operating Temperature Range -40°C to 85°C
• Interface Operating Frequency 400kHz (2.5<VDDI<4.5)
  200kHz (1.6<VDDI<2.5)
• Power Supply Voltage Monitoring Function
  Detection voltage: 2.75V (25°C)
  Detection Voltage Precision: ±1%
  Hysteresis: 5%
• Low Power ConsumptionTyp.: 1A, Max: 3A (Standby mode, VDD=4.5V)
• Built-In EEPROM circuit
• Endurance: 1000K E/W cycles / Address
• Data Retention: 10 Years/85°C
• EEPROM Write Protection Software Write Protection
  After VCC is applied, AK6921F is in the status of Write Disable.
  After the function of EWEN, AK6921F can accept any programming
  function. After the function of EWDS, AK6921F cannot accept any
  programming function.
  READ is executable regardless of the state.
• The state can be confirmed by the status register
  The state of the device can be confirmed Port output and
  Register/EEPROM Mode, EWDS/EWEN status etc. (AK6921F can
  be confirmed below the Detection Voltage.).
• Ultra Small Package 6pin WL-CSP