74HC147 High Speed CMOS Logic 10-to-4 Line Priority Encoder

74HC147 High Speed CMOS is high-speed Si-gate CMOS devices and are pin compatible with low power Schottky TTL (LSTTL). They are specified in compliance with JEDEC standard no. 7A. The 74HC147 9-input priority encoders accept data from nine active LOW inputs (A0 to A8) and provide a binary representation on the four active LOW outputs (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 input line A8 having the highest priority.

The 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.

The value of additional quiescent supply current (∆ICC) for a unit load of 1 is given in the family specifications. To determine ∆ICC per input, multiply this value by the unit load coefficient.

Features: –

• 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
• HC Types
• 2V to 6V Operation
• High Noise Immunity: NIL = 30%, NIH = 30% of VCC at VCC = 5V
• HCT Types
• 4.5V to 5.5V Operation
• Direct LSTTL Input Logic Compatibility, VIL= 0.8V (Max), VIH = 2V (Min)
• CMOS Input Compatibility, Il ≤ 1µA at VOL, VOH

74HC147 High Speed CMOS Specifications :-

74HC147 High Speed CMOS Applications: –

• Memory chip select decoding
• Demultiplexing
• Single line peripheral control
• Allow simple serial bitstreams from a microcontroller to control as many peripheral lines as needed

Datasheet: –

learnabout-electronics.org/…/74HC147-10-to-4-line-encoder.pdf

Package: –

1 x 74HC147 High Speed CMOS Logic 10-to-4 Line Priority Encoder

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