Decimal to BCD Priority Encoder IC - 74HC147
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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: Pinout Of 74HC147 IC
- 9-input priority encoder with 4-bit BCD output
- Active LOW inputs and outputs
- High-speed CMOS technology
- 3.3V and 5V logic compatible
- TTL and LSTTL compatible
- 16-pin DIP package
- Ideal for keypad and interrupt encoding
- Priority encoding logic
- Low power consumption
- High noise immunity
- Compatible with TTL and CMOS systems
- Implied zero encoding when all inputs are HIGH
| 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 |
What is the function of the 74HC147 IC?
It encodes 9 active LOW decimal inputs into a 4-bit active LOW BCD output with priority logic, prioritizing the highest-numbered active input.
Can the 74HC147 be used with Arduino or Raspberry Pi?
Yes, it operates at 3.3V and 5V logic levels and is fully compatible with Arduino and Raspberry Pi GPIO interfaces.
What happens when all inputs are HIGH?
All four outputs go HIGH, representing the implied decimal 'zero' in the encoding scheme.
Is this IC TTL compatible?
Yes, it is pin-compatible with LSTTL and functions reliably in mixed TTL/CMOS systems.
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Shop 74HC147 Decimal to BCD Priority Encoder IC. Compatible with Arduino & Raspberry Pi. High-speed CMOS, TTL compatible. Order now.
Categorised under: 74HC IC Series› Integrated Circuits