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SED1278F/D
PIN CONFIGURATION
QFP5-80pin
PIN DESCRIPTION
Symbol
RS
R/W
E
DB0 to DB7
LP
XSCL
FR
DO
COM 1 to COM16
SEG1 to SEG40
V1 to V5
V
DD
V
SS
OSC1
OSC2
1
ABSOLUTE MAXIMUM RATINGS
Rating
Supply voltage (1)
Supply voltage (2)
Input voltage
Output voltage
Power dissipation
Operating temperature
Storage temperature
Soldering temperature and time
Note: The following condition must always hold true: V
2
SEG38
65
60
SEG37
SEG36
SEG35
SEG34
70
SEG33
SEG32
SED1278F
SEG31
SEG30
SEG29
INDEX
75
SEG28
SEG27
SEG26
SEG25
SEG24
80
5
SEG23
1
No. of signals
1
Register select signal
1
Read/write select signal
1
Read/write execute signal
8
Data bus
1
Data latching pulse
1
Data transfer clock
1
LCD AC driving signal
1
Serial data
Common outputs
16
COM9 to COM16: non-select for 1/8 duty
COM12 to COM16: non-select for 1/11 duty
40
Segment outputs
5
LCD driving power (V
1
+5V
1
0V (GND)
Used to connect resistor (typ. 91K-ohms) for oscillation;
2
OSC1 is for external clock input.
RS
R/W
0
0
0
1
1
0
1
1
Symbol
V
DD
V
to V
1
5
V
I
V
O
P
D
T
opr
T
stg
T
sol
55
50
45
40
DB1
DB0
E
R/W
RS
35
D0
FR
V
DD
XSCL
LP
30
V5
V4
V3
V2
V1
10
15
20
25
OSC2
Function
>
V
)
5
=
SS
E
Instruction write cycle
Busy flag read cycle
1
Address counter read cycle
DD RAM or CG RAM data write cycle
1
DD RAM or CG RAM data read cycle
Value
-0.3 to 7.0
-0.3 to V
DD
-0.3 to V
DD
-0.3 to V
DD
300
-20 to 75
-65 to 150
260˚C 10s (at lead)
> = V
> = V
> = V
> = V
> = V
DD
1
2
3
4
5
Unit: mm
Operation
(V
=0V, Ta=25˚C)
SS
+0.3
+0.3
+0.3
1
Unit
V
V
V
V
mW
˚C
˚C
—
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