Replacement of
1108C
MIK1108C
3.5 Digit Watch Circuit For
Duplexed LCD
revised October 1999
Functions
5 Function: Month, Date, Hour, Minute, Second
Selective alternation of time-date display mode
4 Year calendar
One touch correction of time error within 30 seconds
2-switch sequential operating
LCD test
Features
Single chip CMOS construction
Drives 3.5 digit duplexes LCD
Low power dissipation (IDD: Max 1.8 A, 1.5 V operation)
Colon display
32,768 Hz Crystal controlled operation
Single 1.5 V battery operation
On-chip capacitive voltage doubler
Debounce circuitry on switch inputs
Protection against static discharge
Trimmer capacitor is use selectable (bonding option)
Electrical Characteristics
(T
a
= 25
o
C, V
DD
= 0 V, V
SS
= -1.5 V; unless otherwise specified)
Parameter Symbol
Test
conditions
Min
Typ
Max
Units
V
SS
1.2 1.5 1.8 V
Operating Voltage
V
EE
2.4 3.0 3.6 V
Supply Current
I
DD
Without Load, V
SS
=-1.5V
1.8
A
Input Low Voltage
V
IL
V
SS
V
SS
+0.3 V
Input High Voltage
V
IH
-0.3
0 V
Oscillator Start Voltage
V
OSC
Within 5 sec
1.45
V
DC-DC Conversion Frequency
F
CON
C
1
= C
2
= 0.1
F
512 Hz
LCD Frequency
FD
32
Hz
Quartz Crystal Parameters: Fp = 32768Hz, C
L
= 12.5pF, C
0
= 1.2pF, C
1
=3.0FF, R
r
= 35K
Application Curcuit
SEGMENTS
MIK1108C
COM2
COM1
V
DD
V
EE
OO
OI
V
SS
V
CM
1.5V
X-tal
C
1
C
2
S
D
Vcp
LCD
+
-
C =C =0.1 F
1
2
LCD Format
Page 1 of 2
Replacement of
1108C
MIK1108C
3.5 Digit Watch Circuit For
Duplexed LCD
revised October 1999
Pad location MIK1108C
1
2
3
4
5
6
7
8
9
10
11 12 13
21
22
23
24
25
26
(0;0)
20
19
18
17
16
15
14
MIK1108C
Pad Location Coordinates
Pad Name X
Y Pad
Name
X
Y
Pad
Name X Y
1 B4/C4 140
120
10 F2/E2
1410
120 19 V
CM
1830 980
2 A4/G4 285 120 11 BC1/D2 1550 120 20
T2 1705 985
3 F4/E4 430
120
12
COM2
1690
120 21 V
SS
140 980
4 B3/C3 570
120
13 T1 1835
115 22 S 140 840
5 AD3/G3 710
120
14 OO 1830 290 23 V
DD
140 700
6 F3/E3 850
120
15 OI 1830
440 24 V
EE
140 560
7 COL/D4 990
120
16 OI' 1830 555 25 D 140 420
8 B2/C2
1130
120
17 V
DD
1830
700 26
COM1
140 260
9 A2/G2
1270
120
18 V
CP
1830
840
Remark:
Die sawing street width (X) - 120
m
(Y) - 80
m
Pad N 13 and N 20 size - 90
90 m (Test Pads)
Page 2 of 2
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