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ICM7211 Datasheet, PDF (11/12 Pages) Intersil Corporation – 4-Digit, ICM7211 (LCD) and ICM7212 (LED) Display Drivers
Test Circuit
ICM7211, ICM7212
VDD
+-
VSS
EACH SEGMENT
OUTPUT TO
BACKPLANE
WITH A 200pF
CAPACITOR
1 VDD
40
2
ICM7211AM
39
3
38
4
37
5 BP
OSC 36
6
VSS 35
7
34
8
DIGIT/CHIP
33
9
SELECT 32
INPUTS
10
31
11
30
12
DATA 29
13
INPUTS 28
14
27
15
26
16
25
17
24
18
23
19
22
20
21
VDD
MICROPROCESSOR
VERSION
VSS MULTIPLEXED
VERSION
VDD
FIGURE 11.
Typical Applications
D8
D7
D6
D5
8-DIGIT
LCD DISPLAY
D4
D3
D2
D1
BACKPLANE
+5V
BCD/BINARY
DATA
D8
D7
D6
DIGIT
D5
SELECTS D4
D3
D2
D1
BACKPLANE
SLAVE
28
VDD
SEGMENTS
+5V
VSS
OSC
HIGH ORDER
ICM7211A
B3-B0 D4 D3 D2 D1 BP
4
4
BACKPLANE
MASTER
28
VDD
VSS
OSC
B3-B0
SEGMENTS
LOW ORDER
ICM7211A
D4 D3 D2 D1 BP
4
FIGURE 12. GANGED ICM7211’s DRIVING 8-DIGIT LCD DISPLAY
9-16