74LVC1G139DCTRG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
Texas Instruments 74LVC1G139DCTRG4 is a 1-of-4 inverting 2-line to 4-line decoder and demultiplexer operating from 1.65V to 5.5V supply in an 8-pin SSOP package. Features active-low outputs for direct enable and chip-select applications. Available from stock worldwide with fast shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 8
- Lifecycle
- OBSOLETE
- Datasheet
- 74LVC1G139DCTRG4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of 74LVC1G139DCTRG4?
- 1-of-4 inverting decoder with 2-input address lines and active-low outputs covers 1.65V to 5.5V supply range for multi-voltage system integration
- 8-pin SSOP (R-PDSO-G8) package offers a compact footprint suitable for space-constrained mixed-signal PCBs
- LVC/LCX/Z logic family supports 5V-tolerant inputs, enabling direct interfacing with 5V legacy logic from a 3.3V or lower supply
- Single-function device reduces glue-logic complexity, replacing 2-to-4 decoder functions with one low-power, cost-optimized IC
What is 74LVC1G139DCTRG4 used for?
74LVC1G139DCTRG4 is commonly used to expand chip-select or enable lines from a microcontroller or FPGA, decoding 2-bit addresses into 4 individual active-low device enables for peripheral ICs such as SRAMs, DACs, and ADCs. Its 1.65V to 5.5V supply range makes it compatible with 1.8V, 2.5V, 3.3V, and 5V logic systems, simplifying decoder placement in multi-voltage PCB designs. The active-low output polarity directly drives enable inputs on most memory and bus interface devices without additional inversion.
What are the specifications of 74LVC1G139DCTRG4?
| Pbfree Code | Yes |
| YTEOL | 0 |
| Family | LVC/LCX/Z |
| Input Conditioning | STANDARD |
| JESD-30 Code | R-PDSO-G8 |
| JESD-609 Code | e4 |
| Logic IC Type | 2-LINE TO 4-LINE DECODER |
| Number of Functions | 1 |
| Output Polarity | INVERTED |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SSOP8,.16 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, LOW PROFILE, SHRINK PITCH |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Propagation Delay (tpd) | 16.7ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.5V |
| Supply Voltage-Min (Vsup) | 1.65V |
| Supply Voltage-Nom (Vsup) | 3.3V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | Nickel/Palladium/Gold (Ni/Pd/Au) |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.65mm |
| 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 74LVC1G139DCTRG4 datasheet?
74LVC1G139DCTRG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for 74LVC1G139DCTRG4?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How many chip-select lines can 74LVC1G139DCTRG4 generate from a 2-bit address input?
74LVC1G139DCTRG4 decodes a 2-bit address into 4 mutually exclusive active-low outputs, producing one unique chip-select line for each of the 4 possible address combinations (00, 01, 10, 11). This allows a microcontroller with 2 GPIO pins to address up to 4 peripherals on a shared bus, reducing the total GPIO count needed for device selection.
What supply voltage range does 74LVC1G139DCTRG4 operate across and which logic families is it compatible with?
74LVC1G139DCTRG4 operates from 1.65V to 5.5V supply, covering all common digital logic voltages including 1.8V, 2.5V, 3.3V, and 5V rails. The LVC family's 5V-tolerant inputs allow the device to receive 5V logic signals while powered from a 3.3V supply, eliminating level shifters in mixed 3.3V-to-5V interface designs.
Why is the output polarity of 74LVC1G139DCTRG4 inverted and how does this simplify peripheral interfacing?
The 74LVC1G139 uses inverting (active-low) outputs, meaning only the selected output is driven low while the others remain high. Most memory ICs, SPI devices, and bus peripherals use active-low chip-enable pins, so the active-low outputs of the decoder connect directly without additional NOT gates, reducing the total logic component count by up to 4 inverters in a multi-peripheral design.
What is the physical size of the 8-pin SSOP package on 74LVC1G139DCTRG4 and is a smaller alternative available?
The 8-pin SSOP (R-PDSO-G8) package has a body approximately 3.0mm x 2.8mm with 0.65mm pin pitch, providing a moderate footprint for a single-function logic device. For tighter board constraints, the same 74LVC1G139 function is also available in SC-70 and X2SON packages with body sizes as small as 1.25mm x 1.0mm, cutting PCB area by over 50% for ultra-compact IoT and wearable designs.
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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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