Holtek Semiconductor HT1608
The HT1608 is an LCD driver LSI with 40 output channels using the CMOS technology. It is equipped with two sets of 20-bit bidirectional shift registers, 20-bit data latches, 20-bit LCD drivers, and logic control circuits. The LSI can convert serial data received from an LCD controller into parallel data and supply LCD driv- Block Diagram • LCD driver with serial/parallel conversion function • Common or segment driver output by selection • Remote controllers • Calculators ing waveforms to the LCD panel.FEATURES
● Power supply – +5V for internal logic circuit – –5V for LCD driver circuit● 40 internal LCD drivers available
● Bias voltage: static to 1/5 bias
APPLICATIONS
● Electrical dictionaries● Portable computers
GENERAL DESCRIPTION
The HT1608 is designed for general purpose LCD drivers. It can drive both static and dynamic drive LCDs. The LSI can be applied to either a common driver or a segment driver. 1 3rd Feb ’98 64 QFP package HT1608 2 3rd Feb ’98 Pad Coordinates HT1608 Chip size: 160 × 159 (mil)2 * The IC substrate should be connected to VDD in the PCB layout artwork. Unit: mil Pad No. 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 X –73.80 –73.80 –73.80 –73.80 –73.80 –73.80 –73.80 –73.80 –73.80 –73.80 –73.80 –73.80 –73.80 –73.80 –73.80 –73.80 –73.80 –73.80 –51.03 –42.03 Y 73.22 62.10 54.00 45.90 37.80 29.70 21.60 13.50 5.40 –2.70 –10.80 –18.90 –27.00 –35.10 –43.20 –51.30 –59.40 –73.22 –73.22 –73.22 Pad No. 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 X –3...