PCF8533

Features:

· Single-chip LCD controller/driver
· Selectable backplane drive configuration: static or 2/3/4 backplane multiplexing
· Selectable display bias configuration: static, 1¤2 or 1/3
· Internal LCD bias generation with voltage-follower buffers
· 80 segment drives: up to forty 8-segment numeric characters; up to twentyone 15-segment alphanumeric characters; or any graphics of up to 320 elements
· 80 ´ 4-bit RAM for display data storage
· Auto-incremented display data loading across device subaddress boundaries
· Display memory bank switching in static and duplex drive modes
· Versatile blinking modes
· LCD and logic supplies may be separated
· Wide power supply range: from 1.8 to 5.5 V
· Wide LCD supply range: from 2.5 V for low threshold LCDs and up to 6.5 V for guest-host LCDs and high  threshold (automobile) twisted nematic LCDs
· Low power consumption
· 400 kHz I2C-bus interface
· TTL/CMOS compatible
· Compatible with 4-bit, 8-bit or 16-bit microprocessors/microcontrollers
· May be cascaded for large LCD applications (up to 5120 segments possible)
· No external components
· Compatible with Chip-On-Glass (COG) technology
· Manufactured in silicon gate CMOS process.


Specifications

SYMBOL	PARAMETER	MIN	MAX	MAX
VDD	supply voltage range	-0.5	+6.5	V
IDD	supply current	-50	+50	mA
VLCD	LCD supply voltage	VSS - 0.5	+7.5	V
ILCD	LCD supply current	-50	+50	mA
ISS	negative supply current	-50	+50	mA
VI(n)	input voltage on pads SDA, SCL, CLK, SYNC, SA0, OSC and A0 to A2	VSS - 0.5	VDD + 0.5	V
VO(n)	VO(n)	VSS - 0.5	VLCD + 0.5	V
Ii	DC input current	-10	+10	mA
Io	DC output current	-10	+10	mA
PTOT	total power dissipation	-	400	mW
P/out	power dissipation per output	-	100	mW
TSTG	storage temperature	-65	+150

Description

The PCF8533 is a peripheral device which interfaces to almost any Liquid Crystal Display (LCD) with low multiplex rates. PCF8533 generates the drive signals for any static or multiplexed LCD containing up to four backplanes and up to 80 segments and can easily be cascaded for larger LCD applications. The PCF8533 is compatible with most microprocessors/microcontrollers and communicates via a 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).