LCD DRVR 2.5V/3.3V/5V Tray

The PCF8531 is a low-power CMOS LCD row and column driver, designed to drive dot matrix graphic displays at multiplex rates of 1:17, 1:26, and 1:34. Furthermore, it can drive up to 128 icons. All necessary functions for the display are provided in a single chip, including on-chip generation of VLCD and the LCD bias voltages, resulting in a minimum of external components and low power consumption. The PCF8531 is compatible with most microcontrollers and communicates via a two-line bidirectional I²C-bus. All inputs are CMOS compatible.

• Single-chip LCD controller and driver
• 34 row and 128 column outputs
• Display data RAM 34 × 128 bits
• 128 icons (last row is used for icons)
• Fast-mode I²C-bus interface (400 kbit/s)
• Software selectable multiplex rates: 1:17, 1:26, and 1:34
• Icon mode with multiplex rate 1:2:
  • Featuring reduced current consumption while displaying icons only
• On-chip:
  • Generation of V_LCD (external supply also possible)
  • Selectable linear temperature compensation
  • Oscillator requires no external components (external clock also possible)
  • Generation of intermediate LCD bias voltages
  • Power-On Reset (POR)
• No external components required
• Software selectable bias configuration
• Logic supply voltage range V_DD1 to V_SS1: 1.8 V to 5.5 V
• Supply voltage range for on-chip voltage generator V_DD2 and V_DD3 to V_SS1 and V_SS2: 2.5 V to 4.5 V
• Display supply voltage range V_LCD to V_SS:
  • Normal mode: 4 V to 9 V
  • Icon mode: 3 V to 9 V
• Low-power consumption, suitable for battery operated systems
• CMOS compatible inputs
• Manufactured in silicon gate CMOS process