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Decimal to BCD Priority Encoder IC - 74HC147
Decimal to BCD Priority Encoder IC - 74HC147
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- Buffered Inputs and Outputs
- Typical Propagation Delay: 13ns at VCC = 5V, CL = 15pF, TA = 25oC
- Fan out (Over Temperature Range)
- Standard Outputs: 10 LSTTL Loads
- Bus Driver Outputs:15 LSTTL Loads
- Wide Operating Temperature Range :-55oC to 125oC
- Balanced Propagation Delay and Transition Times.
- Significant Power Reduction Compared to LSTTL Logic ICs
Decimal to BCD Priority Encoder IC - 74HC147
The 74HC Series 74HC147 are high-speed silicon-gate CMOS devices and are pin-compatible with low-power Schottky TTL (LSTTL). The 74HC147 9-input priority encoders accept data from nine active LOW inputs (l1 to l9) and provide binary representation on the four active LOW inputs (Y0 to Y3). A priority is assigned to each input so that when two or more inputs are simultaneously active, the input with the highest priority is represented on the output, with the input l9 line having the highest priority.
These devices provide the 10-line to 4-line priority encoding function by use of the implied decimal “zero”. The “zero” is encoded when all nine data inputs are HIGH, forcing all four outputs HIGH.
Pinout:
Package Includes:
- 1 x IC - 74HC147
Specifications:
| Supply Voltage | − 0.5 to + 7.0V |
| DC Input Diode Current | ± 20 mA |
| DC Output Diode Current | ± 20 mA |
| DC Output Source or Sink Current per Output Pin | ± 25 mA |
| DC VCC or GND Current, per pin | ± 50 mA |
| Storage Temperature Range | − 65°C to + 150 °C |
| Lead Temperature | 300 °C |
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ADDITIONAL RESOURCES
1.What is a priority encoder?
- A priority encoder is a type of encoder that assigns a priority level to each input signal, and outputs the binary code corresponding to the highest-priority input that is active. In the case of the 74HC147, the input signals represent decimal values, and the output signals represent the corresponding BCD codes.
2.What is 74HC147?
- The 74HC147 are high speed silicon-gate CMOS devices and are pin-compatible with low power Schottky TTL (LSTTL). The 74HC147 9-input priority encoders accept data from nine active LOW inputs (l1 to l9) and provide binary representation on the four active LOW inputs (Y0 to Y3).
