GENERAL DESCRIPTION

The PCF8548 is a low power CMOS LCD controller driver, designed to drive a graphic display of 65 rows and 102 columns. All necessary functions for the display are provided in a single chip, including on-chip generation of LCD supply and bias voltages, resulting in a minimum of external components and low power consumption. The PCF8548 interfaces to most microcontrollers via an I2C-bus interface.

FEATURES

• Single-chip LCD controller/driver

• 65 row and 102 column outputs

• Display data RAM 65 × 102 bits

• On-chip:

– Configurable 5 (4, 3 and 2) × voltage multiplier generating VLCD (external VLCD also possible)

– Generation of intermediate LCD bias voltages

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

• 400 kbits/s fast I2C-bus interface

• CMOS compatible inputs

• Mux rate: 1 : 65

• Logic supply voltage range VDD1 to VSS:

– 1.9 to 5.5 V.

• High voltage generator supply voltage range VDD2 to VSS and VDD3 to VSS:

– 2.4 to 4.5 V with LCD voltage internally generated (voltage generator enabled).

• Display supply voltage range VLCD to VSS:

– 4.5 to 9.0 V

• Low power consumption, suitable for battery operated systems

• Temperature compensation of VLCD

• Slim chip layout, suitable for Chip-On-Glass (COG) applications

• Programmable bottom row pads mirroring and top row pads mirroring, for compatibility with both Tape Carrier Package (TCP) and COG applications.

APPLICATIONS

• Telecom equipment

• Portable instruments

• Point of sale terminals.