SN74ALS139DRG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The SN74ALS139DRG4 is a dual 2-line to 4-line decoder/demultiplexer from Texas Instruments in the Advanced Low-power Schottky (ALS) logic family. It features inverted active-low outputs, 50 pF load capacitance rating, and 8 mA output current capability. Housed in a 16-pin SOIC package, it suits address decoding and data routing in digital systems.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- SN74ALS139DRG4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- Dual 2-to-4 line decoder/demultiplexer with independent enable inputs for flexible decoding
- Active-low inverted outputs compatible with standard ALS TTL logic levels
- 50 pF load capacitance rating for reliable high-speed switching
- 8 mA maximum output low current (IOL) for driving standard logic inputs
- 16-pin SOIC package enabling compact SMT board assembly
Applications
The SN74ALS139DRG4 is used in memory address decoding, chip-select generation, and bus demultiplexing in microprocessor and DSP systems. It is well-suited for industrial control equipment, communication hardware, and legacy TTL-compatible digital designs requiring dual independent 2-to-4 decoding functions in a single 16-pin package.
Specifications
| YTEOL | 0 |
| Family | ALS |
| Input Conditioning | STANDARD |
| JESD-30 Code | R-PDSO-G16 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | 2-LINE TO 4-LINE DECODER |
| Max I(ol) | 0.008A |
| Number of Functions | 2 |
| Output Polarity | INVERTED |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP16,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 13mA |
| Prop. Delay@Nom-Sup | 14ns |
| Propagation Delay (tpd) | 14ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 4.5V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | TTL |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 1 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for SN74ALS139DRG4:
Texas Instruments ALS Series, Inverted Output, TTL, PDSO16
Frequently Asked Questions
How does the SN74ALS139DRG4 enable signal support two independent decoder channels in a single package?
Each of the two decoder channels in the SN74ALS139DRG4 has its own active-low enable pin, allowing both channels to operate independently. With 4 outputs per channel and an 8 mA IOL drive capability, designers can control two separate 4-device buses from a single 16-pin SOIC component.
What output drive strength does SN74ALS139DRG4 provide, and is it sufficient for standard TTL bus loads?
The SN74ALS139DRG4 provides a maximum IOL of 8 mA per output with active-low polarity, which is compatible with standard TTL and ALS logic input thresholds. A 50 pF rated load capacitance ensures stable switching on typical PCB trace lengths used in embedded and industrial designs.
When sourcing SN74ALS139DRG4, what is the end-of-life risk and are there pin-compatible AHC or HC alternatives?
The SN74ALS139DRG4 has a YTEOL indicator of 0, suggesting no imminent end-of-life risk at the time of its data record. Buyers evaluating long-term supply should compare it against SN74HC139 or SN74AHC139 alternatives in the same 16-pin SOIC footprint to hedge against future ALS supply shortages.
Is SN74ALS139DRG4 RoHS compliant and what packaging format is it supplied in for SMT production lines?
The SN74ALS139DRG4 carries JESD-609 Code e4, indicating a Pb-free, RoHS-compliant finish. It is supplied in a 16-pin SOIC (PDSO-G16) package on tape-and-reel for automated SMT pick-and-place assembly, which simplifies integration into high-volume PCB production workflows.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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