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7447 IC – BCD to 7 Segment Decoder
৳ 30
The 7447 accepts four lines of BCD (8421) input data, generates their complements internally and decodes the data with seven AND/OR gates having open-collector outputs to drive indicator segments directly.
- Single BCD to 7-Segment Decoder with Open Collector Output
- Outputs Directly Interface to CMOS, NMOS and TTL
- Large Operating Voltage Range
- Wide Operating Conditions
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7447 IC – BCD to 7 Segment Decoder description:
The 7447 accepts four lines of BCD (8421) input data, generates their complements internally and decodes the data with seven AND/OR gates having open-collector outputs to drive indicator segments directly. Each segment output is guaranteed to sink 24 mA in the ON (LOW) state and withstand 15V in the OFF (HIGH) state with a maximum leakage current of 250 mA. Auxiliary inputs provided blanking, lamp test and cascadable zero-suppression functions.
- Single BCD to 7-Segment Decoder with Open Collector Output
- Outputs Directly Interface to CMOS, NMOS and TTL
- Large Operating Voltage Range
- Wide Operating Conditions
What does a 7447 IC do?
IC number 7447 are circuits for BCD to seven segment converters and display from numbers 0 to 9. It decodes BCD in seven segmentations. Normally, IC7447 accepts input that is binary code values. The BCD is processed into seven segments shown as numbers 0 to 9 on a monitor.
Is 7447 common anode or cathode?
Common ANODE. 74LS47 is a BCD to 7-Segment (common Anode) Decoder/Driver with Open-Collector Outputs – In 16-DIP Package.
7447 IC – BCD to 7 Segment Decoder: Recommended Operating Conditions
| Symbol | Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Vcc | Supply Voltage | 4.75 | 5 | 5.25 | V |
| Vih | HIGH Level Input Voltage | 2 | V | ||
| Vil | LOW Level Input Voltage | 0.8 | V | ||
| Ioh | HIGH Level Output Current | -0.4 | mA | ||
| Iol | LOW Level Output Current | 16 | mA | ||
| Ta | Free Air Operating Temperature | 0 | 70 | °C |
Electrical Characteristics
| Symbol | Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|---|
| Vi | Input Clamp Voltage | Vcc=Min Ii=-12mA | -1.5 | V | ||
| Voh | HIGH Level Output Voltage | Vcc=Min Ioh=MAX Vil=MAX | 2.4 | 3.4 | V | |
| Vol | LOW Level Output Voltage | Vcc=Min Iol=MAX Vih=MAX | 0.2 | 0.4 | V | |
| Ii | Input Current@MAX Input Voltage | Vcc=Max Vi=5.5V | 1 | mA | ||
| Iih | HIGH Level Input Current | Vcc=Max Vi=2.4V | 40 | µA | ||
| Iil | LOW Level Input Current | Vcc=Max Vi=0.4V | -1.6 | mA | ||
| Ios | Short Circuit Output Current | Vcc=Max | -18 | -55 | mA | |
| Icch | Supply Current with Outputs HIGH | Vcc=Max | 4 | 8 | mA | |
| Iccl | Supply Current with Outputs LOW | Vcc=Max | 12 | 22 | mA |
Switching Characteristics at Vcc=5V,Ta=25°C
| Symbol | Parameter | Conditions | Min | Typ | Max | Units |
|---|---|---|---|---|---|---|
| tplh | Propagation Delay Time LOW-to-HIGH Level Output | Cl=15pF Rl=400R | 22 | nS | ||
| tphl | Propagation Delay Time HIGH-to-LOW Level Output | Cl=15pF Rl=400R | 15 | nS |
7447 IC – BCD to 7 Segment Decoder Pin Description
| Pin Number | Description |
|---|---|
| 1 | BCD B Input |
| 2 | BCD C Input |
| 3 | Lamp Test |
| 4 | RB Output |
| 5 | RB Input |
| 6 | BCD D Input |
| 7 | BCD A Input |
| 8 | Ground |
| 9 | 7-Segment e Output |
| 10 | 7-Segment d Output |
| 11 | 7-Segment c Output |
| 12 | 7-Segment b Output |
| 13 | 7-Segment a Output |
| 14 | 7-Segment g Output |
| 15 | 7-Segment f Output |
| 16 | Vcc – Positive Supply |
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