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.