BU9831F

Memory ICs Non-volatile electronic potentiometer BU9831 / BU9831F The BU9831 / BU9831F is a non-volatile electronic potentiometer with an internal 2k bit EEPROM. The resistance value can be set by means of serial communications, and because the product contains an internal memory, conditions can be retained. In addition, the 2k bit memory capacity enables digital data to be stored in the memory. Applications Portable LCD backlight adjustment devices for notebook computers, and other sound adjustment devices for sets Features 1) Internal 2k bit EEPROM 2) 100kΩ (1kΩ × 100 steps) electronic potentiometer 3) Data in memory is automatically read when power supply is turned on, and resistance value is set. 4) Resistance value can be set using serial communications. 5) Low current consumption When operating: 3mA (max.) In standby mode: 200µA (max.) Absolute maximum ratings (Ta = 25°C) Parameter Applied voltage Power dissipation BU9831 BU9831F Tstg Topr — IW Symbol VCC Pd Limits – 0.3 ~ + 7.0 500∗1 350∗2 – 65 ~ + 125 – 20 ~ + 85 – 0.3 ~ VCC + 0.3 ± 1.0 Unit V mW °C °C V mA Storage temperature Operating temperature Input voltage Wiper current ∗1 Reduced by 5.0mW for each increase in Ta of 1°C over 25°C. ∗2 Reduced by 3.5mW for each increase in Ta of 1°C over 25°C. Recommended operating conditions Parameter Power supply voltage Power supply voltage for writing Input voltage Voltage at resistor ends Wiper pin voltage Symbol VCC Vccwr VIN VRHL VW Limits 2.7 ~ 5.5 2.8 ~ 5.5 0 ~...