WS7106 / WS7107
Electrical Specifications
PARAMETER
DISPLAY DRIVER
WS7107 ONLY
(Continued)
(Note 1)
TEST CONDITIONS
MIN
TYP
MAX
UNIT
Segment Sinking Current
(Except Pins 19 and 20)
Pin 19 Only
Pin 20 Only
V+ = 5V, Segment Voltage = 3V
5
10
4
8
16
7
-
-
-
mA
mA
mA
NOTES:
1.
Dissipation rating assumes device is mounted with all leads soldered to printed circuit board.
3.
2. Back plane drive is in phase with segment drive for 'off' segment, 180 degrees out of phase for 'on' segment. Frequency is 20
times conversion rate. Average DC component is less than 50mV
3. Not tested, Quaranteed by design.
Typical Applications and Test Circuits
+
R
1
R
3
OSC 1 40
OSC 2 39
OSC 3 38
C
4
TEST 37
R
4
C
1
R
5
C
5
C
2
R
2
C
3
DISPLAY
REF HI 36
REF LO 35
C
REF
+ 34
C
REF
- 33
COM 32
IN HI 31
IN LO 30
A-Z 29
BUFF 28
INT 27
V- 26
G2 25
C3 24
A3 23
G3 22
WS7106
20 POL
19 AB4
G1
D1
C1
B1
A1
D2
10 C2
11 B2
12 A2
15 D3
16 B3
V+
E1
14 E2
18 E3
F1
13 F2
17 F3
1
2
3
4
5
6
7
8
9
DISPLAY
FIGURE 1. WS
7106 TEST CIRCUIT AND TYPICAL APPLICATION WITH LCD DISPLAY COMPONENTS SELECTED FOR 200mV
FULL SCALE
+5V
R
5
C
1
C
5
C
2
R
2
C
3
DISPLAY
+
IN
-
-5V
R
1
R
3
OSC 1 40
OSC 2 39
OSC 3 38
C
4
TEST 37
R
4
BP 21
REF HI 36
REF LO 35
C
REF
+ 34
C
REF
- 33
COM 32
IN HI 31
IN LO 30
A-Z 29
BUFF 28
INT 27
V- 26
G2 25
C3 24
A3 23
G3 22
WS7107
20 POL
19 AB4
G1
D2
10 C2
11 B2
12 A2
15 D3
16 B3
D1
C1
B1
A1
V+
E1
14 E2
18 E3
13 F2
17 F3
F1
1
2
3
4
5
6
7
8
9
DISPLAY
FIGURE 2. WS
7107 TEST CIRCUIT AND TYPICAL APPLICATION WITH LED DISPLAY COMPONENTS SELECTED FOR 200mV
FULL SCALE
3
GND 21
-
C
1
= 0.1µF
C
2
= 0.47µF
C
3
= 0.22µF
C
4
= 100pF
C
5
= 0.02µF
R
1
= 24kΩ
R
2
= 47kΩ
R
3
= 100kΩ
R
4
= 1kΩ
R
5
= 1MΩ
C
1
= 0.1µF
C
2
= 0.47µF
C
3
= 0.22µF
C
4
= 100pF
C
5
= 0.02µF
R
1
= 24kΩ
R
2
= 47kΩ
R
3
= 100kΩ
R
4
= 1kΩ
R
5
= 1MΩ
+
IN
-
9V
WINGS [ WING SHING COMPUTER COMPONENTS ]
