CD40147B 10-Line to 4-Line BCD Priority Encoder | TI.com

CD40147B (ACTIVE)

10-Line to 4-Line BCD Priority Encoder

10-Line to 4-Line BCD Priority Encoder - CD40147B
Datasheet
 

Description

The CD40147B CMOS encoder features priority encoding of the inputs to ensure that only the highest-order data line is encoded. Ten data input lines (0-9) are encoded to four-line (8, 4, 2, 1) BCD. The highest priority line is line 9. All four output lines are logic 1 (VSS) when all input lines are logic 0. All inputs and outputs are buffered, and each output can drive one TTL low-power Schottky load. The CD40147B is functionally similar to the TTL54/74147 if pin 15 is tied low.

The CD40147B types are supplied in 16-lead dual-in-line plastic packages (E suffix), 16-lead small-outline packages (M, M96, MT and NSR suffixes), and 16-lead thin shrink small-outline packages (PW and PWR suffixes).

Features

  • Encodes 10-line to 4-line BCD
  • Active low inputs and outputs
  • Standardized, symmetrical output characteristics
  • 100% tested for quiescent current at 20 V
  • 5-V, 10-V, and 15-V parametric ratings
  • Meets all requirements of JEDEC Tentative Standard No. 13B, "Standard Specifications for Description of 'B' Series CMOS Devices"
  • Maximum input current of 1 µA at 18 V over full package-temperature range; 100 nA at 18 V and 25°C
  • Noise margin (full package temperature range) =
         1 V at VDD = 5 V
         2 V at VDD = 10 V
         2.5 V at VDD = 15 V
  • Applications:
    • Keyboard encoding
    • 10-line to BCD encoding
    • Range selection

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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 charged device model (kV)
ESD HBM (kV)
CD40147B
Encoder
Multiplexer    
CD4000    
3    
18    
4    
5
10
15    
8    
0.3    
400    
10:4    
Standard    
1.5    
-1.5    
Catalog    
-55 to 125    
PDIP | 16
SOIC | 16    
See datasheet (PDIP)
16SOIC: 59 mm2: 6 x 9.9 (SOIC | 16)    
10    
5    
0.75    
2