HT1602L Datasheet, PDF (1/7 Pages) Holtek Semiconductor Inc – 40 Dot Matrix LCD Segment Driver

HT1602L
40 Dot Matrix LCD Segment Driver
Features
· Operating voltage: 2.7V~5.2V
· LCD driving voltage: 3.0V~5.0V
· Applicable LCD duty from 1/8 to 1/16
· Suitable for various types of LCD panel
· Bias voltage adjustable from an external
source
Applications
· Interface with HT163A
· Electronic dictionaries
· Portable computers
· Remote controllers
· Calculators
General Description
The HT1602L is a dot matrix LCD segment
driver LSI implemented in CMOS technology.
The chip contains 40-bit shift register (two
20-bit shift registers), 40-bit latch (two 20-bit
latches), 40-bit level shifter, 40-bit 4-level
driver and control circuits.
The HT1602L can convert serial data received
from an LCD controller parallel data and then
send them out as LCD driving waveforms to the
LCD panel. The chip is applicable up to 1/16
duty. Furthermore, the bias voltage which de-
termines the LCD driving voltage can be op-
tionally supplied from an external source, thus
the chip is suitable for driving various LCD
panel. These special features increase the ver-
satility of the chip.
Block Diagram
D O 19
A LT
V5 V3 V2 VDD
D I0
LO A D
C LK
D I2 0
2 0 - b it S h ift
R e g is te r 1
2 0 - b it S h ift
R e g is te r 2
2 0 - b it L a tc h
2 0 - b it L a tc h
4 0 - b it
Level
S h ifte r
Y0
4 0 - b it
4 Level
D r iv e r
Y 39
D O 39
VSS
1
September 1, 2000