PCF8579 Datasheet | NXP Semiconductors

description The PCF8579 is a low power CMOS1 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 cascaded and up to 32 devices may be used on the same I2C-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 patible with most microcontrollers and municates via a two-line bidirectional bus (I2C-bus). To allow partial VDD shutdown the ESD protection system of the SCL and SDA pins does not use a diode connected to VDD. munication overhead is minimized by a display RAM with auto-incremented addressing and display bank switching. 2. Features I LCD column driver I Used in conjunction with the PCF8578, this device forms part of a chip set capable of driving up to 40960 dots I 40 column outputs I Selectable multiplex rates; 1:8, 1:16, 1:24 or 1:32 I Externally selectable bias configuration, 5 or 6 levels I Easily cascadable for large applications (up to 32 devices) I 1280-bit RAM for display data storage I Display memory bank switching I Auto-incremented data loading across hardware subaddress boundaries (with PCF8578) I Power-On Reset (POR) blanks display I Logic voltage supply range 2.5 V to 6 V I Maximum LCD supply voltage 9 V I Low power consumption I I2C-bus interface I patible with most microcontrollers I Optimized pinning for single plane wiring in multiple device applications (with PCF8578) I Space saving 56-lead small outline package and 64-pin quad flat pack 1. The definition of the abbreviations and acronyms used in this data sheet can be found in Section 15. NXP Semiconductors LCD column driver for dot matrix graphic displays 3. Applications I Automotive information systems I Telemunication...