PCF8537 | NXP

Overview

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 be easily connected to a microcontroller by either the two-line I²C-bus (PCF8537AH) or a three-line bidirectional SPI-bus (PCF8537BH).

Features

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
400 kHz I²C-bus interface (PCF8537AH)
5 MHz SPI-bus interface (PCF8537BH)
Programmable temperature compensation of V_LCD in four regions
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

Target Applications

White goods
Handheld electronics
Battery operated equipment
Machine control systems
Measuring equipment
Information boards
Panels
Consumer
Industrial
Medical and health care

Features

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
400 kHz I²C-bus interface (PCF8537AH)
5 MHz SPI-bus interface (PCF8537BH)
Programmable temperature compensation of V_LCD in four regions
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

Target Applications

OM13500A:PCA8537 and PCF8537 evaluation board

Evaluation and Development Boards

PCF8537: Industrial LCD driver for multiplex rates up to 1:8

Overview

Features

Target Applications

Target Applications

Development Boards and Designs

Development Boards and Designs