Circuitos Integrados | ||
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ICM7228B |
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8-digit LED display decoder/driver, common cathode |
PDF datasheet |
DIGIT 4 | 1 • | 28 | GND |
DIGIT 6 | 2 | 27 | DIGIT 7 |
DIGIT 3 | 3 | 26 | DIGIT 5 |
DIGIT 1 | 4 | 25 | DIGIT 2 |
ID6 | 5 | 24 | DIGIT 8 |
ID5 | 6 | 23 | SEG g |
ID7 | 7 | 22 | SEG f |
WRITE | 8 | 21 | SEG e |
MODE | 9 | 20 | SEG c |
ID4 | 10 | 19 | Vcc |
ID1 | 11 | 18 | SEG d |
ID0 | 12 | 17 | SEG b |
ID2 | 13 | 16 | SEG a |
ID3 | 14 | 15 | DP |
Pin | Symbol | Description |
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1 | DIGIT 4 | digit 4 cathode |
2 | DIGIT 6 | digit 6 cathode |
3 | DIGIT 3 | digit 3 cathode |
4 | DIGIT 1 | digit 1 cathode |
5 | ID6 | data bit 6 (HEXA/CODE-B ) |
6 | ID5 | data bit 5 (DECODE ) |
7 | ID7 | data bit 7 (DATA COMING) |
8 | WRITE | write (active low, low-to-high edge triggered) |
9 | MODE | mode select (control or data word) |
10 | ID4 | data bit 4 (SHUTDOWN ) |
11 | ID1 | data bit 1 |
12 | ID0 | data bit 0 |
13 | ID2 | data bit 2 |
14 | ID3 | data bit 3 |
15 | DP | decimal point anode |
16 | SEG a | segment a anode |
17 | SEG b | segment b anode |
18 | SEG d | segment d anode |
19 | Vcc | supply voltage |
20 | SEG c | segment c anode |
21 | SEG e | segment e anode |
22 | SEG f | segment f anode |
23 | SEG g | segment g anode |
24 | DIGIT 8 | digit 8 cathode |
25 | DIGIT 2 | digit 2 cathode |
26 | DIGIT 5 | digit 5 cathode |
27 | DIGIT 7 | digit 7 cathode |
28 | GND | ground |
Specifications |
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(typical values under recommended operating conditions, unless specified) |
Parameter | Value | Unit |
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Display scan rate | 390 | Hz |
Inter-digit blanking time | 10 | µs |
Write pulse width |
100 (low) 540 (high) |
ns |
Mode setup time | 150 | ns |
Data setup time | 160 | ns |
Minimum digit drive capability | 50 | mA |
Segment driver output impedance | 100 | Ω |
Peak current drive per segment | 10 | mA |
Notes |
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Note |
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Data is maintained by an independent source and accuracy is not guaranteed. Check with the manufacturer's datasheet for up-to-date information. |
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