7447 – 7447 BCD to 7-Segment Decoder/Driver Datasheet
Photograph
Features
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
Not Recommended for New Designs Use 74LS47
Pin Layout
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 |
Dimensional Drawing
Technical Data
Absolute Maximum Ratings
| Supply Voltage | 7V |
| Input Voltage | 5.5V |
| Operating Free Air Temperature | 0°C to 70°C |
| Storage Temperature Range | -65°C to 150°C |
Recommended Operating Conditions
| Symbol | Parameter | Min | Typ | Max | Units |
|---|---|---|---|---|---|
| Vcc | Supply Votage | 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 [email protected] 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 |
