PCA8551 is an ultra low-power LCD segment driver with 4 backplane- and 36segment-driver outputs, with either an I2C- (PCA8551A) or an SPI-bus (PCA8551B)interface. It comprises an internal oscillator, bias generation, instruction decoding, anddisplay controller.

• AEC-Q100 grade 2 compliant for automotive applications
• Single chip LCD controller and driver
• Selectable backplane drive configuration: static, 2, 3, or 4 backplane multiplexing
• Selectable display bias configuration: static, 1?2, or 1?3
• Internal LCD bias generation with buffers
• 36 segment drives:
  • Up to 18 7-segment numeric characters
  • Up to 9 14-segment alphanumeric characters
  • Any graphics of up to 144 segments/elements
• Auto-incrementing display data and instruction loading
• Versatile blinking modes
• Independent supplies of VLCD and VDD
• Power supply ranges:
  • 1.8 V to 5.5 V for VLCD
  • 1.8 V to 5.5 V for VDD
• Ultra low-power consumption
• 400 kHz I2C-bus interface (PCA8551A)
• 5 MHz SPI-bus interface (PCA8551B)
• Internally generated or externally supplied clock signal

• Displays integrated
  • in a car instrument cluster
  • in a control indicator
• Battery operated applications
• Healthcare devices

• PMBT3904MB - 40 V，200 mA NPN开关晶体管
• 74AHCT123AD - 双可再触发单稳态多谐振荡器，带重置
• PMBTA56 - PNP通用晶体管
• 2N7002 - 60 V，300 mA N沟道Trench MOSFET
• PCA9555A - 带有中断和弱上拉的低电压16位I2C总线I/O端口
• 74HC21 - 双路4输入与门
• 74AXP1G06GS - 带开漏输出的低功耗逆变器
• XC7SH02GW - 2输入或非门
• 2PB709BRL - 50 V，200 mA PNP通用晶体管
• 74CBTLVD3861BQ - 10位电平转换总线开关，具有输出使能