PCF8534A | NXP Semiconductors

Overview

The PCF8534A is a peripheral device which interfaces to almost any Liquid Crystal Display (LCD) 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 should not be used for new designs. Recommended replacement: PCF85134HL

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Features

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 x 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, ¹/₂, or ¹/₃
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

MoreLess

Features

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 x 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, ¹/₂, or ¹/₃
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

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PCF8534A: Universal LCD Driver for Low Multiplex Rates

Overview

Features

Features