PCF8578 LCD row/column driver for dot matrix graphic displays Rev. 06 5 May 2009 Product data sheet 1. General description 1 The PCF8578 is a low power CMOS LCD row and column driver, designed to drive dot matrix graphic displays at multiplex rates of 1:8, 1:16, 1:24 or 1:32. The device has 40 outputs, of which 24 are programmable and congurable for the following ratios of 32 24 16 8 rows/columns: , , or . The PCF8578 can function as a stand-alone LCD 8 16 24 32 controller and driver for use in small systems. For larger systems it can be used in conjunction with up to 32 PCF8579s for which it has been optimized. Together these two devices form a general purpose LCD dot matrix driver chip set, capable of driving displays of up to 40960 dots. The PCF8578 is compatible with most microcontrollers and 2 communicates via a two-line bidirectional bus (I C-bus). Communication overhead is minimized by a display RAM with auto-incremented addressing and display bank switching. 2. Features n Single chip LCD controller and driver n Stand-alone or may be used with up to 32 PCF8579s (40960 dots possible) 32 24 16 8 n 40 driver outputs, congurable for several ratios of rows/columns: , , or 8 16 24 32 n Selectable multiplex rates: 1:8, 1:16, 1:24 or 1:32 n Externally selectable bias conguration, 5 or 6 levels n 1280-bit RAM for display data storage and scratch pad n Display memory bank switching n Auto-incremented data loading across hardware subaddress boundaries (with PCF8579) n Provides display synchronization for PCF8579 n On-chip oscillator, requires only 1 external resistor n Power-On Reset (POR) blanks display n Logic voltage supply range 2.5 V to 6 V n Maximum LCD supply voltage 9 V n Low power consumption 2 n I C-bus interface n Compatible with most microcontrollers n Optimized pinning for single plane wiring in multiple device applications (with PCF8579) n Space saving 56-lead small outline package and 64 pin quad at pack 1. The denition of the abbreviations and acronyms used in this data sheet can be found in Section 15.PCF8578 NXP Semiconductors LCD row/column driver for dot matrix graphic displays 3. Applications n Automotive information systems n Telecommunication systems n Point-of-sale terminals n Industrial computer terminals n Instrumentation 4. Ordering information Table 1. Ordering information Type number Package Name Description Version PCF8578T/1 VSO56 plastic very small outline package 56 leads SOT190-1 PCF8578H/1 LQFP64 plastic low prole quad at package 64 leads body SOT314-2 1 10 10 1.4 mm PCF8578HT/1 TQFP64 plastic thin quad at package 64 leads SOT357-1 body 10 10 1.0 mm 1 Should not be used for new designs. 5. Marking Table 2. Marking codes Type number Marking code PCF8578T/1 PCF8578T PCF8578H/1 PCF8578H PCF8578HT/1 PCF8578HT PCF8578 6 NXP B.V. 2009. All rights reserved. Product data sheet Rev. 06 5 May 2009 2 of 46