SED1278F Datasheet, PDF (3/13 Pages) Epson Company – Dot Matrix LCD Controller Driver

SED1278F/D
s ELECTRICAL CHARACTERISTICS
q DC Characteristics
Characteristic
Symbol
Condition
"H" level input voltage (1)
"L" level input voltage (1)
"H" level input voltage (2)
"L" level input voltage (2)
"H" level output voltage (1)
"L" level output voltage (1)
V_IH1
V_IL1
V_IH2
V_IL2
V_OH1
V_OL1
I_OH = –0.205mA
I_OL = 1.6mA
"H" level output voltage (2)
V_OH2
I_OH = –0.04mA
"L" level output voltage (2)
Driver-on resistor (COM)
Driver-on resistor (SEG)
I/O leakage current
Pull-up MOS current
Supply current
External clock operation
V_OL2
R_COM
R_SEG
I_IL
—I_P
I_OP
I_OL = 0.04mA
‚ V_COM—V_n ‚ =0.5V
‚ V_SEG—V_n ‚ =0.5V
V_I = 0 to V_DD
V_DD = 5V
Rf oscillation, from
external clock
V_DD = 5V, fosc = f_CP = 270kHz
External clock operating frequency
External clock duty
f_EXTCL
Duty
External clock rise time
tr_EXTCL
External clock fall time
tf_EXTCL
Internal clock operation (Rf oscillation)
Oscillation frequency
f_OSC
Internal clock operation (Ceramic filter oscillation)
R_f = 91KΩ ±2%
Oscillation frequency
LCD driving voltage
f_OSC
V_LCD
Ceramic filter
V_DD—V₅
(V_DD = 5.0V±10%, V_SS = 0V, Ta = –20 to 75°C)
Applicable _{Min. Typ. Max.}
Unit
Pin
DB0~DB7 ^2.0
—
V_DD
V
RS, R/W, E _VSS
—
0.8
V
OSC1 V_DD—1.0 —
V_DD
V
V_SS
—
1.0
V
DB0~DB7 2.4
—
—
V
—
—
0.4
V
XSCL _{0.9VDD —}
—
V
LP
DO
—
— 0.1V_DD
V
COM1~16 —
2
10
kΩ
SEG1~40 —
2.5
10
kΩ
—
—
1
µA
50
125 250
µA
V_DD
—
0.5 0.8
mA
125 250 350
kHz
45
50
55
%
—
—
0.2
µS
—
—
0.2
µS
190 270 350
kHz
245 250 255
kHz
3.0
—
V_DD
V
q AC Characteristics
r Read Cycle
Characteristic
Enable cycle time
Enable "H" level pulse width
Enable rise/fall time
RS, R W setup time
RS, R W address hold time
Read data output delay
Read data hold time
Symbol
t_cycE
t_WEH
t_rE, t_fE
t_AS
t_AH
t_RD
t_DHR
Condition
C_L = 100pF
(V_DD = 5.0V±10%, V_SS = 0V, Ta = –20 to 75°C)
Min.
Typ.
Max.
Unit
500
—
—
ns
220
—
—
ns
—
—
25
ns
40
—
—
ns
10
—
—
ns
—
—
120
ns
20
—
—
ns
r Write Cycle
Characteristic
Enable cycle time
Enable "H" level pulse width
Enable rise/fall time
RS, R/W setup time
RS, R/W address hold time
Data setup time
Write data hold time
Symbol
t_cycE
t_WEH
t_rE, t_fE
t_AS
t_AH
t_DS
t_DH
Condition
(V_DD=5.0V±10%, V_SS=0V, Ta=–20 to 75°C)
Min.
Typ.
Max.
Unit
500
—
—
ns
220
—
—
ns
—
—
25
ns
40
—
—
ns
10
—
—
ns
60
—
—
ns
10
—
—
ns
3