PCF8801 Datasheet | NXP Semiconductors

FEATURES - Single-chip LCD controller/driver - Fixed backplane multiplexing at a rate of 1 : 2 - Internal LCD bias generation (0.5VDD) - 140 segment outputs configured to drive seven 40-segment characters - On-chip oscillator with one external resistor - Wide power supply range (2.7 V up to 5.5 V) - Low power consumption - patible with most microprocessors/microcontrollers - 1 MHz serial bus interface (280-bit shift register) - Easily cascaded for large LCD applications (two cascade directions possible) - patible with chip-on-glass technology - Manufactured by silicon gate CMOS process. GENERAL DESCRIPTION The PCF8801 is a peripheral device which interfaces a multiplexed Liquid Crystal Display (LCD) having two backplanes and up to 140 segments. It generates drive signals at a multiplex rate of 1 : 2 allowing seven 40-segment (5 x 8) characters to be driven. ORDERING INFORMATION TYPE NUMBER PCF8801U PACKAGE NAME - chip with bumps in tray DESCRIPTION The chip can easily be cascaded for larger LCD applications, and the direction of the information flow in the cascade can be selected. The PCF8801 is patible with most microprocessors/microcontrollers and municates via a serial bus interface prising a 280-bit shift register. The outputs are multiplexed by a clock signal generated by the internal oscillator which needs only one external resistor. Cascade applications only require the clock signal to be generated by the first device with the internal oscillators in the other devices disabled. The PCF8801 is designed for chip-on-glass applications. It has a narrow package with raised points (bumps) for easy assembly on to LCD glass. VERSION - 2000 Feb 04 Philips Semiconductors Product specification LCD driver for 140 × 2 segments BLOCK DIAGRAM PCF8801 handbook, full pagewidth LDPI LDNI DI1 DO1 DIR CLKI CLKO DO2 DI2 LCD BIAS GENERATOR IO1_1 OM1 SH1_1 280-BIT IO140_2 OM140 SH140_2 BI280-BIT ROUTING OUTPUT DIRECTIONAL OUTPUT BLOCK MULTIPLEXER SHIFT REGISTER...