PCF8576

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
· 40 segment drives: up to twenty 8-segment numeric characters; up to ten 15-segment alphanumeric characters; or any graphics of up to 160 elements
· 40 ´ 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 2 V for low-threshold LCDs and up to 9 V for guest-host LCDs and high-threshold (automobile) twisted nematic LCDs
· Low power consumption
· Power-saving mode for extremely low power consumption in battery-operated and telephone applications
· I2C-bus interface
· TTL/CMOS compatible
· Compatible with any 4-bit, 8-bit or 16-bit microprocessors/microcontrollers
· May be cascaded for large LCD applications (up to 2560 segments possible)
· Cascadable with 24-segment LCD driver PCF8566
· Optimized pinning for plane wiring in both single and multiple PCF8576 applications
· Space-saving 56-lead plastic very small outline package (VSO56)
· Very low external component count (at most one resistor, even in multiple device applications)
· Compatible with chip-on-glass technology
· Manufactured in silicon gate CMOS process.

Pinout




Specifications

SYMBOL	PARAMETER	MIN.	MAX.	UNIT
VDD	supply voltage	-0.5	+11.0	V
VLCD	LCD supply voltage	VDD - 11.0	VDD	V
VI	input voltage SDA, SCL, CLK, SYNC, SA0, OSC, A0 to A2	VSS - 0.5	VDD + 0.5	V
VO	output voltage S0 to S39, BP0 to BP3	VLCD - 0.5	VDD + 0.5	V
II	DC input current	-	20	mA
IO	DC output current	-	25	mA
IDD, ISS, ILCD	VDD, VSS or VLCD current	-	50	mA
Ptot	total power dissipation	-	400	mW
PO	power dissipation per output	-	100	mW
Tstg	storage temperature	-65	+150

Description

The PCF8576 is a peripheral device which interfaces to almost any Liquid Crystal Display (LCD) with low multiplex rates. PCF8576 generates the drive signals for any static or multiplexed LCD containing up to four backplanes and up to 40 segments and can easily be cascaded for larger LCD applications. The PCF8576 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).