PCF8537AH/1,518 NXP

PCF8537 Industrial LCD driver for multiplex rates up to 1:8 Rev. 1 31 May 2012 Product data sheet 1. General description 1 The PCF8537 is a fully featured Liquid Crystal Display (LCD) driver, specifically designed for high-contrast Vertical Alignment (VA) LCD with multiplex rates up to 1:8. It generates the drive signals for any static or multiplexed LCD containing up to eight backplanes, 46 segments, and up to 352 elements. The PCF8537 features an internal charge pump with internal capacitors for on-chip generation of the LCD driving voltage. To ensure an optimal and stable contrast over the full temperature range, the PCF8537 offers a programmable temperature compensation of the LCD supply voltage. The PCF8537 can 2 be easily connected to a microcontroller by either the two-line I C-bus (PCF8537AH) or a three-line bidirectional SPI-bus (PCF8537BH). 2. Features and benefits Low-power single-chip LCD controller and driver 352 elements allowing to drive: up to 44 7-segment alphanumeric characters up to 22 14-segment alphanumeric characters Selectable backplane drive configuration: static, 2, 4, 6, or 8 backplane multiplexing Software programmable internal charge pump for on-chip LCD voltage generation up to 9 V with internal capacitors 2 400 kHz I C-bus interface (PCF8537AH) 5 MHz SPI-bus interface (PCF8537BH) Programmable temperature compensation of V in four regions LCD Selectable display bias configuration Wide range for digital power supply: from 1.8 V to 5.5 V Wide LCD supply range: from 2.5 V for low threshold LCDs and up to 9.0 V for high threshold twisted nematic LCDs Display memory bank switching in static, duplex, and quadruplex drive modes 352-bit RAM for display data storage Programmable frame frequency in the range of 60 Hz to 300 Hz in steps of 10 Hz factory calibrated Integrated temperature sensor with temperature readout On chip calibration of internal oscillator frequency and V LCD Manufactured in silicon gate CMOS process 1. The definition of the abbreviations and acronyms used in this data sheet can be found in Section 17.PCF8537 NXP Semiconductors Industrial LCD driver for multiplex rates up to 1:8 3. Applications White goods Handheld electronics Battery operated equipment Machine control systems Measuring equipment Information boards Panels Consumer Industrial Medical and health care 4. Ordering information Table 1. Ordering information Type number Interface type Package Name Description Version 2 PCF8537AH/1 I C-bus TQFP64 plastic thin quad flat package 64 leads SOT357-1 body 10 10 1.0 mm PCF8537BH/1 SPI-bus TQFP64 plastic thin quad flat package 64 leads SOT357-1 body 10 10 1.0 mm 5. Marking Table 2. Marking codes Type number Marking code PCF8537AH/1 PCF8537AH PCF8537BH/1 PCF8537BH PCF8537 All information provided in this document is subject to legal disclaimers. NXP B.V. 2012. All rights reserved. Product data sheet Rev. 1 31 May 2012 2 of 82