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74HC147 9-Input Priority Encoders
High-speed CMOS priority encoders with 10-line to 4-line encoding function
- Buffered Inputs and Outputs: Yes
- Propagation Delay: 13ns at VCC = 5V, CL = 15pF, TA = 25oC
- Fan Out: Standard Outputs: 10 LSTTL Loads, Bus Driver Outputs: 15 LSTTL Loads
- Operating Temperature Range: -55oC to 125oC
- Power Reduction: Significant compared to LSTTL Logic ICs
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). When multiple inputs are active simultaneously, the highest priority input (l9 having the highest priority) is represented on the output, utilizing the implied decimal "zero".
Symbol Parameter Value Unit
- VCC Supply Voltage: 0.5 to +7.0V
- IIK DC Input Diode Current: ±20 mA
- IOK DC Output Diode Current: ±20 mA
- IO DC Output Source or Sink Current per Output Pin: ±25 mA
- ICC DC VCC or GND Current, per pin: ±50 mA
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