PCF8579HT/1 NXP

PCF8579 LCD column driver for dot matrix graphic displays Rev. 05 11 May 2009 Product data sheet 1. General description 1 The PCF8579 is a low power CMOS LCD 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 and can drive 32 40 dots in a 32 row multiplexed LCD. Up to 16 PCF8579s can be 2 cascaded and up to 32 devices may be used on the same I C-bus (using the two slave addresses). The device is optimized for use with the PCF8578 LCD row/column driver. Together these devices form a general purpose LCD dot matrix driver chip set, capable of driving displays of up to 40960 dots. The PCF8579 is compatible with most 2 microcontrollers and communicates via a two-line bidirectional bus (I C-bus). To allow partial V shutdown the ESD protection system of the SCL and SDA pins does not use a DD diode connected to V . Communication overhead is minimized by a display RAM with DD auto-incremented addressing and display bank switching. 2. Features n LCD column driver n Used in conjunction with the PCF8578, this device forms part of a chip set capable of driving up to 40960 dots n 40 column outputs n Selectable multiplex rates 1:8, 1:16, 1:24 or 1:32 n Externally selectable bias conguration, 5 or 6 levels n Easily cascadable for large applications (up to 32 devices) n 1280-bit RAM for display data storage n Display memory bank switching n Auto-incremented data loading across hardware subaddress boundaries (with PCF8578) 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 PCF8578) 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.PCF8579 NXP Semiconductors LCD 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 PCF8579T/1 VSO56 plastic very small outline package 56 leads SOT190-1 PCF8579H/1 LQFP64 plastic low prole quad at package 64 leads SOT314-2 1 body 10 10 1.4 mm PCF8579HT/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 PCF8579T/1 PCF8579T PCF8579H/1 PCF8579H PCF8579HT/1 PCF8579HT PCF8579 5 NXP B.V. 2009. All rights reserved. Product data sheet Rev. 05 11 May 2009 2 of 41