Specifications
EPSON 8–53
SED1240 Series
SED1240
Series
DC CHARACTERISTICS
[VSS = –5.5 V to –1.8 V, Ta = –30 to 85°C unless otherwise specified]
Dynamic system
Item Symbol Condition min typ max Unit Applicable pin
Minimum reset pulse width
tRW —10——µs*8
Reset start time t
RES ———50ns*8
Item Symbol Condition min typ max Unit Applicable pin
Frame frequency f
FR Ta=25°C VSS=–3.0V 70 100 130 Hz *10
External clock frequency f
CK 2-line display (SED1242) — 28.8 — KHz *10 *11
f
CK 3-line display (SED1241) — 41.6 — KHz *10 *11
f
CK 4-line display (SED1240) — 54.4 — KHz *10 *11
Item Symbol Condition min typ max Unit Applicable pin
Supply
Recommended
VSS — –3.6 — –2.4 V VSS *1
voltage (1)
operation
–5.5 –1.8
Supply
Recommended
VSS2 — –3.6 — –2.4 V VSS2
voltage (2)
operation
–5.5 –1.8 *2 *9
Supply
Recommended
V5 When 1/4 bias used –16.0 — –5.0 V V5 *2
voltage (3)
operation
When 1/5 bias used –16.0 — –4.5 V
V
1, V2 — 0.6×V5 —VDD VV1, V2
V3, V4 —V5 — 0.4×V5 VV3, V4
High-level input voltage (1)
VIHC VSS = –2.4V to –1.8V 0.1×VSS —VDD V*3
Low-level input voltage (1)
VILC VSS — 0.9×VSS V
High-level input voltage (2)
VIHC VSS = –5.5V to –2.4V 0.2×VSS —VDD V
Low-level input voltage (2)
VILC VSS — 0.8×VSS V
Input leak current I
LI VIN = VDD or VSS –1.0 — 1.0 µA*3
Liquid crystal driver ON R
ON Ta=25°CV5=–7.0V — 20 40 KΩ COM,SEG
resistance ∆V=0.1V *4
Static current consumption
IDDQ — — 0.1 5.0 µAVDD
Dynamic IDD
During display
V5=–6V no load — — 80 µAVDD *5
current At standby Oscillation ON, — — 20 µAV
DD *6
consumption
power OFF
At sleep Oscillation OFF, — — 5 µAV
DD
power OFF
During access fcyc=200KHZ — — 500 µAV
DD *7
Input pin capacity C
IN Ta=25°C f=1MHZ — 5.0 8.0 pF *3
Item Symbol Condition min typ max Unit Applicable pin
Input voltage V
SS2 Double boosting –5.5 — –1.8 V VSS2
Triple boosting –5.5 — –1.8
Boosting output V
OUT Double boosting –11.0 — — V VOUT
voltage Triple boosting –16.5 — —
Voltage regulating
VOUT — –16.5 — –5.4 V VOUT
circuit operating voltage
Voltage follower V5 — –16.0 — –4.5 V V5 *12
operating voltage
Reference voltage V
REG Ta = 25°C –0.05%/°C –2.06 –2.0 –1.94 V —
Built-in power supply