SED1526 Series
• High-speed, 8-bit microprocessor interface allowing direct
connection to both the 8080 and 6800
• Supported serial interface
OVERVIEW
The SED1526 series is a single-chip LCD driver for dot-matrix
liquid crystal displays (LCD’s). It accepts serial or 8-bit parallel
display data directly from a microprocessor and stores data in an on-
chip display RAM. It can generate an LCD drive signal independent
from microprocessor clock.
• Rich command functions (upward compatible to SED 1520
Series); they are Read/Write Display Data, Display On/Off
Switching, Set Page Address, Set Initial Display Line, Set
Column Address, Read Status, Static Drive On/Off Switch-
ing, Select Duty, Duty+1, Read-Modify-Write, Select
Segment Driver Direction, Power Save, Reset, Set Power
Control, Set Electronic Controls, Clock Stop.
• On-chip CR oscillator circuit
• On-chip LCD power circuit (The on-chip and external LCD
power supplies are software selectable.)
• Very low power consumption
• Flexible power voltages; 2.4 to 6.0 V (VDD-VSS) and -13.0
to -4.0 V (VDD-V5)
• -40 to +85°C wide operating temperature range
• CMOS process
As the SED1526 series features the very low power dissipation and
wide operating voltage range, it can easily realize a powerful but
compact display unit having a small battery.
A single chip of SED1526 series can drive a 17×80-pixel or 33×64-
pixel LCD panel.
(Note: The SED1526 series are not designed to have EMI resist-
ance.)
FEATURES
• Direct data display using the display RAM. When RAM
data bit is 0, it is not displayed; when 1, it is displayed.
• Large 80×33-bit RAM capacity
• 128-pin QFP5 package with aluminum pad or gold bump
• On-chip LCD driver circuit (97 segment and common
drivers)
Series Specifications (for 128-pin flat package)
Operating clock fCL
(Internal OSC) (TYP.)
Segment
driver
Common
driver
VREG
type
COM
pin positions
Model
Duty
QFP
SED1526F0A
SED1526FBA
SED1526FAA
SED1526FEA
SED1526FEY
SED1528F0A
SED1528DBB
2.9
5.8
2.9
Type A
Type B
Type 1
5
1/8, 1/9, 1/16, 1/17
80
64
17
33
20 kHz
2.9
2.9
2.9
5.8
Type 2
Type 1
26
5
Type A
1/32, 1/33
—
VREG type
Type 1 VREG (Built-in power supply regulating voltage)
Temperature gradient: -0.17% /°C
Type 2 VREG (Built-in power supply regulating voltage)
Temperature gradient: 0.00% /°C
COMS pin positions Refer to No. P3 (Package pin layout), No. P4 (PAD layout) and No. P5 (PAD coordinates).
An SED1526 series package has one of following subcodes according to its package type (an example of SED1526):
SED1526F
:
128-pin QFP5 flat package
**
SED1526F Y: 128-pin QFP26 flat package
*
SED1526D
**
:
Bear chip
SED1526D A having aluminum pad
*
SED1526D B having gold bump
*
SED1526T**: TCP
EPSON
4–1