CD74HC147 High Speed CMOS Logic 10-to-4 Line Priority Encoder | TI.com

CD74HC147 (ACTIVE)

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

High Speed CMOS Logic 10-to-4 Line Priority Encoder - CD74HC147
Datasheet
 

Description

The ’HC147 and CD74HCT147 are high speed silicon-gate CMOS devices and are pin-compatible with low power Schottky TTL (LSTTL).

The ’HC147 and CD74HCT147 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 input line l9 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.

Features

  • Buffered Inputs and Outputs
  • Typical Propagation Delay: 13ns at VCC = 5V, CL = 15pF, TA = 25°C
  • Fanout (Over Temperature Range)
    • Standard Outputs...10 LSTTL Loads
    • Bus Driver Outputs...15 LSTTL Loads
  • Wide Operating Temperature Range... –55°C to 125°C
  • 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

Data sheet acquired from Harris Semiconductor

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Parametrics Compare all products in Encoders & decoders

 
Function
Technology Family
VCC (Min) (V)
VCC (Max) (V)
Channels (#)
Voltage (Nom) (V)
F @ nom voltage (Max) (Mhz)
ICC @ nom voltage (Max) (mA)
tpd @ Nom Voltage (Max) (ns)
Configuration
Type
IOL (Max) (mA)
IOH (Max) (mA)
Rating
Operating temperature range (C)
Package Group
Package size: mm2:W x L (PKG)
Bits (#)
Digital input leakage (Max) (uA)
ESD CDM (kV)
ESD HBM (kV)
CD74HC147 CD54HC147
Encoder
Multiplexer    
Encoder/Multiplexer    
HC     HC    
2     2    
6     6    
1     1    
3.3
5    
3.3
5    
28     28    
0.08     0.08    
32     32    
10:4     10:4    
Standard     Standard    
5.2     5.2/-5.2    
-5.2      
Catalog     Military    
-55 to 125     -55 to 125    
PDIP | 16
SOIC | 16
TSSOP | 16    
CDIP | 16    
See datasheet (PDIP)
16SOIC: 59 mm2: 6 x 9.9 (SOIC | 16)
16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)    
See datasheet (CDIP)    
10     10    
5     5    
0.75     0.75    
2     2