IN472-3 Datasheet, PDF (1/3 Pages) Integral Corp. – Liquid Crystal Display Controller

TECHNICAL DATA
Liquid Crystal Display Controller
IN472-3
The IN472-3-3 Liquid Crystal Display (LDC) Controller is a
perpheral member of the COPS^TM family, fabricated using CMOS
technology. The IN472-3 drives a multiplexed liquid crystal directly.
Data is loaded serially and is held in internal latches. The In472-3
contains an on-chip oscillator and generates all the multi-level
waveforms for back-planes and segment outputs on a triplex display.
One IN472-3 can drive 36 segments multiplexed as 3 x 12 (4¹/₂ digit
display). Two IN472-3 devices can be used together to drive
72 segments (3 x 24) which could be an 8¹/₂ digit display.
• Direct interface to TRIPLEX LCD
• Low power dissipation (100 µW typ.)
• Low cost
• Compatible with all COP400 processors
• Needs no refresh from processor
• On-chip oscillator and latches
• Expandable to longer displays
• Software compatible with COP470 V.F.Display Driver Chip
• Operates from display voltage
• MICROWIRE^TM compatible serial I/O
• 20-pin Dual-In-Line package
ORDERING INFORMATION
IN472-3N Plastic
IN472-3DW SOIC
T_A = 0° to 70° C
for all packages
PIN ASSIGNMENT
Pin Description
Pin
CS
V_DD
GND
DI
SK
BP_A
BP_B
BP_C
SA1∼SA4
Description
Chip select
Power supply (display voltage)
Ground
Serial data input
Serial clock input
Display backplane A (or oscillator in)
Display backplane B
Display backplane C (or oscillator out)
12 multiplexed outputs
1