1
FEATURES
Number of LCD drive outputs: 240
Supply voltage for LCD drive: +15.0 to +30.0 V
Supply voltage for the logic system: +2.5 to +5.5 V
Low power consumption
Low output impedance
ST8024
(Segment mode)
Shift clock frequency
20MHz(MAX.): VDD = +5.0 ± 0.5V
15MHz(MAX.): VDD = +3.0 to + 4.5V
12MHz(MAX.): VDD = +2.5 to + 3.0V
Adopts a data bus system
4-bit/8-bit parallel input modes are
selectable with a mode (MD) pin
Automatic transfer function of an
enable signal
Automatic counting function which, in
the chip selection mode, causes the
internal clock to be stopped by
automatically counting 240 bits of
input data
Line latch circuits are reset when
/DISPOFF active
(Common mode)
Shift clock frequency: 4 MHz (MAX.)
Built-in 240-bit bi-directional shift
register (divisible into 120 bits x 2)
Available in a single mode (240-bit
shift register) or in a dual mode
(120-bit shift register x 2)
Y1->Y240 Single mode
Y240->Y1 Single mode
Y1->Yl20, Y121->Y240 Dual mode
Y240->Y121, Yl20->Y1 Dual mode
The above 4 shift directions are
pin-selectable
Shift register circuits are reset when
/DISPOFF active
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DESCRIPTION
The ST8024 is a 240-output segment/common driver IC suitable for driving large/medium scale
dot matrix LCD panels, and is used in personal computers/work stations. The ST8024 is good
both as a segment driver and a common driver, and it can create a low power consuming,
high-resolution LCD.
Ver 2.1
Page 2/28
2009/08/19