PCF8534A_15 Datasheet, PDF (1/52 Pages) NXP Semiconductors – Universal LCD driver for low multiplex rates

PCF8534A
Universal LCD driver for low multiplex rates
Rev. 6 — 25 July 2011
Product data sheet
1. General description
The PCF8534A is a peripheral device which interfaces to almost any Liquid Crystal
Display (LCD)¹ with low multiplex rates. It generates the drive signals for any static or
multiplexed LCD containing up to four backplanes and up to 60 segments. It can be easily
cascaded for larger LCD applications. The PCF8534A is compatible with most
microcontrollers and communicates via the two-line bidirectional I²C-bus. Communication
overheads are minimized by a display RAM with auto-incremented addressing, by
hardware subaddressing, and by display memory switching (static and duplex drive
modes).
• PCF8534AHL/1 should not be used for new design-ins. Replacement part is
PCF85134HL/1
2. Features and benefits
 AEC-Q100 compliant (PCF8534AH/1) for automotive applications
 Single-chip LCD controller and driver
 Selectable backplane drive configurations: static or 2, 3, or 4 backplane multiplexing
 60 segment outputs allowing to drive:
 30 7-segment numeric characters
 15 14-segment alphanumeric characters
 Any graphics of up to 240 elements
 Cascading supported for larger applications
 60  4-bit display data storage RAM
 Wide LCD supply range: from 2.5 V for low threshold LCDs up to 6.5 V for high
threshold twisted nematic LCDs
 Internal LCD bias generation with voltage follower buffers
 Selectable display bias configurations: static, ¹â„₂, or ¹â„₃
 Wide logic power supply range: from 1.8 V to 5.5 V
 LCD and logic supplies may be separated
 Low power consumption
 400 kHz I²C-bus interface
 No external components required
 Display memory bank switching in static and duplex drive modes
 Versatile blinking modes
 Silicon gate CMOS process
1. The definition of the abbreviations and acronyms used in this data sheet can be found in Section 19.