PCF8578HT/1,518

The PCF8578HT/1,518 from NXP Semiconductors is a versatile, low-power CMOS LCD row and column driver. It is designed to drive dot matrix graphic displays with selectable multiplex rates of 1:8, 1:16, 1:24, or 1:32. The device offers 40 driver outputs that are programmable and configurable for various row/column ratios, including 32/8, 24/16, 16/24, or 8/32.

This driver IC features a 1280-bit RAM for display data storage and scratchpad functions, along with display memory bank switching and auto-incremented addressing for efficient communication via its I2C-bus interface. It is compatible with most microcontrollers and can function as a stand-alone controller or be used in conjunction with up to 32 PCF8579 devices for larger display systems, capable of driving up to 40960 dots.

The PCF8578HT/1,518 operates with a logic supply voltage range of 2.5V to 6V and a maximum LCD supply voltage of 9V. It is available in a space-saving 64-pin quad flat pack (TQFP) package and is suitable for surface mounting. Its low power consumption makes it ideal for various applications including automotive information systems, telecommunication systems, point-of-sale terminals, industrial computer terminals, and instrumentation.

Key features include externally selectable bias configuration (5 or 6 levels), an on-chip oscillator requiring only one external resistor, and Power-On Reset (POR) functionality that blanks the display. The device is optimized for single plane wiring in multiple device applications when used with the PCF8579.