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| Part Number | SN74HCT138N | SN74HCT139N | SN74HCT138NS | SN74HCT138D | 
|---|---|---|---|---|
| Manufacturer | Texas Instruments | Texas Instruments | Texas Instruments | Texas Instruments | 
| Product Status | Active | Active | Active | Active | 
| Type | Decoder/Demultiplexer | Decoder/Demultiplexer | Decoder/Demultiplexer | Decoder/Demultiplexer | 
| Circuit | 1 x 3:8 | 1 x 2:4 | 1 x 3:8 | 1 x 3:8 | 
| Independent Circuits | 1 | 2 | 1 | 1 | 
| Current - Output High, Low | 4mA, 4mA | 4mA, 4mA | 4mA, 4mA | 4mA, 4mA | 
| Voltage Supply Source | Single Supply | Single Supply | Single Supply | Single Supply | 
| Voltage - Supply | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 4.5V ~ 5.5V | 
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | -40°C ~ 85°C | 
| Mounting Type | Through Hole | Through Hole | Surface Mount | Surface Mount | 
| Package / Case | 16-DIP (0.300", 7.62mm) | 16-DIP (0.300", 7.62mm) | 16-SOIC (0.209", 5.30mm Width) | 16-SOIC (0.154", 3.90mm Width) | 
| Supplier Device Package | 16-PDIP | 16-PDIP | 16-SO | 16-SOIC |