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15. Electrical Characteristics (H8/3857 Group)
15.2.5
LCD Characteristics
Table 15.8 shows the LCD characteristics, and table 15.9 shows the step-up circuit characteristics,
of the H8/3855, H8/3856, and H8/3857.
Table 15.8 LCD Characteristics of H8/3855, H8/3856, and H8/3857
V
= 3.0 V to 5.5 V, AV
CC
including subactive mode, unless otherwise specified.
Item
Symbol Applicable Pins Test Conditions Min
Common driver
R
COM
on-resistance
Segment driver
R
SEG
on-resistance
LCD power
I
EE
supply current
LCD power
V
LCD
supply voltage
Notes: 1. Applies to the resistance (R
the common signal pins (COM1 to COM32), and the resistance (R
V1OUT, V3OUT, V4OUT, and V
when Id is flowing in the pins.
2. This is the current when the built-in op-amps are operating and display is halted (all
driver outputs are at the V
3. Specifies the voltage range in which the COM/SEG pin output voltages are within the
LCD reference voltage values (V1, V2, V3, V4, V5, and V
state. A voltage not lower than V
4. The guaranteed temperature as an electrical characteristic for die type products is
75°C.
Rev.3.00 Jul. 19, 2007 page 416 of 532
REJ09B0397-0300
= 3.0 V to 5.5 V, V
CC
COM1 to COM32 ±Id = 0.05 mA,
SEG1 to SEG64 ±Id = 0.05 mA,
V
LCD
V
LCD
) between the V1OUT, V2OUT, V5OUT, and V
COM
pins and the segment signal pins (SEG1 to SEG64),
SS
level).
SS
must be applied to V
CC
= AV
= 0.0 V, T
SS
SS
a
⎯
V
= 4 V
LCD
⎯
V
= 4 V
LCD
⎯
V
= 5.5 V,
LCD
f
= 32.768 kHz
x
V
CC
LCD
4
= –20°C to +75°C*
,
Values
Typ Max Unit Notes
6
20
kΩ
6
20
kΩ
μA
20
40
⎯
7.0
V
SS
) between the
SEG
) ±0.15 V in the unloaded
SS
.
1
*
1
*
2
*
3
*
pins and
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