| Circuitos Integrados | ||
|---|---|---|
| ICM7228B |
|---|
| 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 |
|---|---|---|
| 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 |
|---|
| (typical values under recommended operating conditions, unless specified) |
| Parameter | Value | Unit |
|---|---|---|
| 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 |
|---|
|
| Note |
|---|
| 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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