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128 Segment LCD Drivers CMOS

The MC145003/5004 are 128–segment, multiplexed–by–four LCD Drivers. The two devices are functionally the same except for their data input protocols. The MC145003 uses an SPI data input protocol which is directly compatible with that of the MC6805 family of microcomputers. Using a minimal amount of software (see example), the device may be interfaced to the MC68HCXX product families. The MC145004 has a IIC interface and has essentially the same protocol, except that the device sends an acknowledge bit back to the transmitter after each eight–bit byte is received. MC145004 also has a “read mode”, whereby data sent to the device may be retrieved via the IIC bus.

Devices are independently addressable via a two–wire (or three–wire) communication link which can be common with other MC145003/MC145004 and/or other peripheral devices.

? Drives 128 Segments Per Package

? Devices May Be Cascaded for Larger LCD Applications

? May Be Used with the Following LCDs: Segmented Alphanumeric, Bar Graph, Dot Matrix, Custom

? Quiscent Supply Current: 85 μA @ 2.8 V VDD

? Operating Voltage Range: 2.8 to 5.5 V

? Operating Temperature Range: – 40 to 85°C

? Separate Access to LCD Drive Section’s Supply Voltage to Allow for Temperature Compensation

? See Application Notes AN1066 and AN442