SN74LS139ADE4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The SN74LS139ADE4 is a dual 2-to-4 line decoder/demultiplexer from Texas Instruments in the LS TTL logic family. It features Schottky-clamped inputs for high-speed switching performance, a 15 pF rated load capacitance, and comes in a 16-pin SOIC package with AEC-Q100 automotive qualification. Widely used for address decoding, data routing, and chip-select generation in digital systems.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 16
- Lifecycle
- OBSOLETE
- Datasheet
- SN74LS139ADE4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of SN74LS139ADE4?
- Dual independent 2-to-4 line decoder/demultiplexer in a single 16-pin package
- Schottky-clamped inputs for high-performance switching speed in the LS logic family
- Active-LOW outputs for direct chip-select and enable signal generation
- Standard TTL input conditioning compatible with LS, ALS, and CMOS logic levels
- AEC-Q100 qualified (E4 suffix) for automotive and industrial applications
What is SN74LS139ADE4 used for?
The SN74LS139ADE4 is frequently used in microprocessor address decoding schemes where two select lines must activate one of four memory banks or peripheral devices. Its dual independent sections allow two separate decode operations in a single package, reducing component count in bus-based digital designs. It is also used as a demultiplexer to route a data signal to one of four outputs in communication and control circuits.
What are the specifications of SN74LS139ADE4?
| YTEOL | 0 |
| Additional Feature | SCHOTTKY CLAMPED FOR HIGH PERFORMANCE |
| Family | LS |
| Input Conditioning | STANDARD |
| JESD-30 Code | R-PDSO-G16 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 15pF |
| Logic IC Type | 2-LINE TO 4-LINE DECODER |
| Max I(ol) | 0.008A |
| Number of Functions | 2 |
| Output Characteristics | OPEN-EMITTER |
| Output Polarity | INVERTED |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP16,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Packing Method | TUBE |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 11mA |
| Prop. Delay@Nom-Sup | 38ns |
| Propagation Delay (tpd) | 38ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.25V |
| Supply Voltage-Min (Vsup) | 4.75V |
| 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 |
Where can I find the SN74LS139ADE4 datasheet?
SN74LS139ADE4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for SN74LS139ADE4?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
What output current can the SN74LS139ADE4 sink, and how does that affect fan-out in TTL designs?
The SN74LS139ADE4 has a maximum low-level output current (IOL) of 8 mA. In standard TTL circuits where a typical load input sinks about 0.4 mA, this allows the device to drive up to approximately 20 standard TTL loads from a single output, making it sufficient for most address decode fan-out requirements.
How does the dual-section design of the SN74LS139ADE4 save board space in a memory decode circuit?
The SN74LS139ADE4 contains two fully independent 2-to-4 decoders in a single 16-pin SOIC package. This means a designer can decode two separate address ranges or control two independent chip-select buses without adding a second IC, saving at least one 16-pin footprint and reducing PCB routing complexity.
Is the SN74LS139ADE4 suitable for automotive electronics, and what temperature range does it cover?
Yes, the E4 suffix on the SN74LS139ADE4 denotes AEC-Q100 automotive qualification, and the device is rated for operation over a -40°C to +85°C temperature range. This qualification and extended temperature coverage make it appropriate for automotive body control modules and under-dash electronic assemblies.
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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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