SN74HC138 3-Line To 8-Line Decoders/Demultiplexers | TI.com

SN74HC138 (ACTIVE)

3-Line To 8-Line Decoders/Demultiplexers

 

Description

The SNx4HC138 devices are designed to be used in high-performance memory-decoding or data-routing applications requiring very short propagation delay times. In high-performance memory systems, these decoders can be used to minimize the effects of system decoding. When employed with high-speed memories using a fast enable circuit, the delay times of these decoders and the enable time of the memory are usually less than the typical access time of the memory. This means that the effective system delay introduced by the decoders is negligible.

Features

  • Targeted Specifically for High-Speed Memory Decoders and Data-Transmission Systems
  • Wide Operating Voltage Range (2 V to 6 V)
  • Outputs Can Drive Up To 10 LSTTL Loads
  • Low Power Consumption, 80-µA Maximum ICC
  • Typical tpd = 15 ns
  • ±4-mA Output Drive at 5 V
  • Low Input Current of 1-µA Maximum
  • Active Low Outputs ( Selected Output is Low)
  • Incorporate Three Enable Inputs to Simplify Cascading or Data Reception

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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)
SN74HC138 SN54HC138 SN74HC138-Q1
Decoder
Demultiplexer    
Decoder/Demultiplexer     Decoder    
HC     HC     HC    
2     2     2    
6     6     6    
1     1     1    
3.3
5    
3.3
5    
3.3
5    
28     28     28    
0.08     0.08     0.08    
45     45     45    
3:8     3:8     3:08    
Standard     Standard     Push-pull    
5.2     5.2/-5.2     5.2    
-5.2       -5.2    
Catalog     Military     Automotive    
-40 to 85     -55 to 125     -40 to 125    
PDIP | 16
SOIC | 16
SO | 16
SSOP | 16
TSSOP | 16    
CDIP | 16
CFP | 16
LCCC | 20    
SOIC | 16
TSSOP | 16    
See datasheet (PDIP)
16SO: 80 mm2: 7.8 x 10.2 (SO | 16)
16SOIC: 59 mm2: 6 x 9.9 (SOIC | 16)
16SSOP: 48 mm2: 7.8 x 6.2 (SSOP | 16)
16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)    
See datasheet (CDIP)
See datasheet (CFP)
20LCCC: 79 mm2: 8.89 x 8.89 (LCCC | 20)    
16SOIC: 59 mm2: 6 x 9.9 (SOIC | 16)
16TSSOP: 22 mm2: 4.4 x 5 (TSSOP | 16)    
8     8     8    
5     5     5    
0.75     0.75     0.75    
2     2     2