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

• NX3L1T5157GM - 低电阻单刀双掷模拟开关
• BZX585-C10 - 稳压器二极管
• PDTC114EM - NPN配电阻晶体管；R1 = 10 kΩ，R2 = 10 kΩ
• PESD5V0L2UM - 低电容双ESD保护二极管
• 74HC132PW - 四路2输入与非施密特触发器
• PBSS4260QA - 60 V，2 A NPN低VCEsat (BISS)晶体管
• CBT3251 - 8选1 FET多路复用器/解复用器
• PUMH15 - NPN/NPN配电阻晶体管；R1 = 4.7 kΩ，R2 = 4.7 kΩ
• BZX84J-B5V1 - 单倍齐纳二极管
• 74HC58 - 双路与或门