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Product Detailed Parameters
- Description：IC DECODER/DEMUX 1X2:4 16DIP
- Series：74HC
- Mfr：Texas Instruments
- Package：Tube
- Type：Decoder/Demultiplexer
- Circuit：1 x 2:4
- Independent Circuits：2
- Current - Output High, Low：5.2mA, 5.2mA
- Voltage Supply Source：Single Supply
- Voltage - Supply：2V ~ 6V
- Operating Temperature：-40°C ~ 85°C
- Mounting Type：Through Hole
- Package / Case：16-DIP (0.300", 7.62mm)
- Supplier Device Package：16-PDIP
- Grade：-
- Qualification：-
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Overview
The SN74HC139NG4 is a dual 2-line to 4-line decoder/demultiplexer from the Texas Instruments HC logic series, housed in a 16-pin PDIP package. It operates within a supply voltage range of 2 V to 6 V and supports an operating temperature range of -40°C to 85°C. The device features fully buffered inputs and active-low outputs. Key electrical characteristics include a maximum input current of 1 μA, typical propagation delay of 10 ns at 5 V, and output drive capability of ±4 mA at 5 V. It can drive up to 10 LSTTL loads with low power consumption.
Feature Summary
- Designed for high-speed memory decoders and data-transmission systems
- Wide operating voltage range supporting 2 V to 6 V applications
- Outputs capable of driving up to 10 LSTTL loads
- Low power consumption with maximum ICC of 80 μA
Applications
- High-performance memory decoding
- Data-routing systems
- Demultiplexing applications using active-low enable as data line
Procurement Notes
Verify the ordering suffix 'G4' indicates lead-free and RoHS-compliant manufacturing per Texas Instruments standards. Confirm the package type matches the required 16-pin PDIP form factor for through-hole mounting. Ensure the operating temperature range meets the specific environmental requirements of the target application circuit.
Selection Notes
Select this component when a dual 2-to-4 decoder is required for CMOS or LSTTL interfacing. The HC series offers wide voltage flexibility compared to HCT variants. Consider the PDIP package for prototyping or applications requiring through-hole assembly. Verify that the propagation delay specifications align with the system timing constraints.
Part Context
The SN74HC139 belongs to the SNx4HC139 family of dual decoders. The 'N' suffix denotes the PDIP (Plastic Dual In-line) package, while 'G4' signifies lead-free and RoHS compliance. This part is distinct from automotive-qualified versions like the SN74HC139-Q1 and military-grade SN54HC139 variants.
Replacement Considerations
SN74HC139N
FAQ
Can the enable input be used for demultiplexing?
Yes, the active-low enable (G) input can function as a data line in demultiplexing applications.
What is the output polarity of the SN74HC139?
The outputs are active-low; only the selected output goes low while all others remain high when enabled.
