GENERAL DESCRIPTION

The PCF8535 is a low power CMOS LCD row/column driver, designed to drive dot matrix graphic displays at multiplex rates of 1 : 17, 1 : 26, 1 : 34, 1 : 49 and 1 : 65. Furthermore, it can drive up to 133 icons. All necessary functions for the display are provided in a single chip, including on-chip generation of LCD bias voltages, resulting in a minimum of external components and low power consumption. The PCF8535 is compatible with most microcontrollers and communicates via an industry standard two-line bidirectional I2C-bus serial interface. All inputs are CMOS compatible.

FEATURES

• Single-chip LCD controller/driver

• 65 row, 133 column outputs

• Display data RAM 65 × 133 bits

• 133 icons (last row is used for icons)

• Fast mode I2C-bus interface (400 kbits/s)

• Software selectable multiplex rates: 1 : 17, 1 : 26, 1 : 34, 1 : 49 and 1 : 65

• On-chip:

– Generation of intermediate LCD bias voltages

– Oscillator requires no external components (external clock also possible)

– Generation of VLCD.

• CMOS compatible inputs

• Software selectable bias configuration

• Logic supply voltage range VDD1 to VSS1 4.5 to 5.5 V

• Supply voltage range for high voltage part VDD2 and VDD3 to VSS2 and VSS3 4.5 to 5.5 V

• Display supply voltage range VLCD to VSS:

– Mux rate 1 : 65: 8 to 16 V.

• Low power consumption, suitable for battery operated systems

• Internal Power-on reset and/or external reset

• Temperature read back available

• Manufactured in N-well silicon gate CMOS process.

APPLICATIONS

• Automotive information systems

• Telecommunication systems

• Point-of-sale terminals

• Instrumentation.