PCF8566T

Product Summary

The PCF8566T is a peripheral device which interfaces to almost any Liquid Crystal Display (LCD) with low multiplex rates. The PCF8566T generates the drive signals for any static or multiplexed LCD containing up to four backplanes and up to 24 segments and can easily be cascaded for larger LCD applications. The PCF8566T is compatible with most microprocessors or 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).

Parametrics

PCF8566T absolute maximum ratings: (1)VDD supply voltage: -0.5 to 7.0 V; (2)VLCD LCD supply voltage: -0.5 to 7.0 V; (3)VI input voltage on each of the pins SCL, SDA, A0 to A2, OSC, CLK,SYNC and SA0: -0.5 to 7.0 V; (4)VO output voltage on each of the pins S0 to S23 and BP0 to BP3: 0.5 to 7.0 V; (5)II input current: -0 to +20 mA; (6)IO output current: -25 to +25 mA; (7)IDD supply current: -50 to +50 mA; (8)ISS ground supply current: -50 to +50 mA; (9)IDD(LCD) LCD supply current: -50 to +50 mA; (10)Ptot total power dissipation: 400 mW; (11)Po, output power: 100 mW; (12)Tstg storage temperature: -65 to +150℃; (13)Vesd electrostatic discharge voltage: ±2000 V; (14)I latch-up current: 100 mA.

Features

PCF8566T features: (1)Versatile blinking modes; (2)No external components required (even in multiple device applications); (3)Selectable backplane drive configuration: static or 2, 3, 4 backplane multiplexing; (4)Selectable display bias configuration: static,1/2 or 1/3; (5)Internal LCD bias generation with voltage-follower buffers; (6)24 × 4-bit RAM for display data storage; (7)Auto-incremented display data loading across device subaddress boundaries; (8)Display memory bank switching in static and duplex drive modes; (9)LCD and logic supplies may be separated; (10)2.5 V to 6 V power supply range; (11)Low power consumption; (12)Power-saving mode for extremely low power consumption in battery-operated and telephone applications; (13)I2C-bus interface; (14)TTL and CMOS compatible; (15)Compatible with any 4, 8 or 16-bit microprocessor or microcontroller; (16)May be cascaded for large LCD applications (up to 1536 segments possible); (17)Cascadable with 40-segment LCD driver PCF8576C; (18)Optimized pinning for plane wiring in both and multiple PCF8566 applications; (19)Space-saving 40-lead plastic very small outline package (VSO40; SOT158-1); (20)Manufactured in silicon gate CMOS process.

Diagrams