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Texas Instruments SN74LVC139ADRG4
- Part No.:
- SN74LVC139ADRG4
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN74LVC139ADRG4.pdf
- Description:
- IC DECODER/DEMUX 1X2:4 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,408
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Product details
Overview
SN74LVC139ADRG4 from Texas Instruments is a dual 2-line to 4-line decoder/demultiplexer in SOIC-16 package, operating from 1.65 V to 3.6 V, with max propagation delay of 6.2 ns at 3.3 V and input tolerance up to 5.5 V. It supports mixed-voltage translation between 3.3-V and 5-V logic domains and features fully buffered inputs for low loading.
For engineers reviewing the SN74LVC139ADRG4 datasheet, SN74LVC139ADRG4 pinout, SN74LVC139ADRG4 application, or SN74LVC139ADRG4 equivalent, this device is selected for address decoding in low-voltage microcontroller peripherals, I/O expansion logic, and bus demultiplexing where level-shifting and fast switching are required.
Technical Context
The SN74LVC139ADRG4 integrates two independent 2-to-4 decoders, each with active-low enable (G) and complementary select inputs (A, B). Each decoder drives four active-high outputs (Y0–Y3), with all outputs high when G is high - enabling use as a 1-to-4 demultiplexer when G serves as data input.
Its LVC family process ensures CMOS-compatible input thresholds across supply voltages, latch-up immunity >250 mA per JESD17, and ESD protection exceeding 2000-V HBM. Inputs tolerate 5.5 V regardless of VCC, allowing safe interfacing with legacy 5-V drivers in 3.3-V systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - supports single-supply operation in modern low-voltage digital systems including battery-powered and mixed-signal SoC interfaces. |
| Max tpd | 6.2 ns at VCC = 3.3 V - enables reliable timing in 80-MHz+ address decode paths with margin for board trace delays. |
| Input Voltage Tolerance | Up to 5.5 V - permits direct connection to 5-V TTL/CMOS outputs without external level shifters. |
| Output Drive | ±24 mA at VCC = 3.0 V - sufficient to drive multiple LVC/LVT inputs or small capacitive loads (<30 pF) without buffering. |
| Power Consumption | ICC ≤ 10 µA at VCC = 3.6 V - supports ultra-low static power in always-on control logic blocks. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded applications including motor control and sensor interface modules. |
Pinout & Package
SN74LVC139ADRG4 uses a 16-pin SOIC (D) package, 10.4 mm × 6.2 mm × 2.0 mm height, with standard 1.27 mm pitch and gull-wing leads. Pin 1 is marked by a beveled corner or dot; device orientation follows JEDEC MS-012.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 15, 16 | 1G, 2G, VCC | Active-low enable for Decoder 1; active-low enable for Decoder 2; positive supply rail - enables independent gating of each decoder's output group. |
| 2, 3, 4, 5 | 1A, 1B, 1Y0, 1Y1 | Decoder 1 select inputs A/B; Decoder 1 outputs Y0/Y1 - Y0–Y3 are mutually exclusive active-high outputs per decode cycle. |
| 6, 7, 10, 11 | 1Y2, 1Y3, 2A, 2B | Decoder 1 outputs Y2/Y3; Decoder 2 select inputs A/B - allows simultaneous but independent addressing of two 4-bit resource banks. |
| 12, 13, 14, 9 | 2Y0, 2Y1, 2Y2, 2Y3 | Decoder 2 outputs Y0–Y3 - all four outputs driven high when 2G = high, supporting demux mode with 2G as data line. |
| 8 | GND | Ground reference - must be connected to system ground plane with low-inductance path to minimize switching noise coupling. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent decoders | Two 2-to-4 decoders share no internal logic - enables concurrent address decoding for separate peripheral groups (e.g., SPI flash + I²C EEPROM). |
| 5.5-V tolerant inputs | Accepts 5-V signals at any VCC ≥ 1.65 V - eliminates need for discrete level translators in mixed-voltage FPGA or MCU designs. |
| Low dynamic power | Cpd = 30.5 pF at 3.3 V - reduces switching current and EMI in high-frequency clocked decode trees. |
| High noise immunity | VIL = 0.35×VCC (min), VIH = 0.65×VCC (min) - ensures robust operation under noisy PCB conditions with marginal signal integrity. |
| Latch-up resistant | Exceeds 250 mA per JESD17 - prevents destructive failure during hot-plug or transient overvoltage events in industrial backplanes. |
Applications
| Memory Address Decoding | Peripheral I/O Expansion |
|---|---|
|
Use Scenario: Selecting one of four SRAM or ROM chips in an 8-bit microcontroller system using A1–A0 address lines. IC Role / Device Role / Timing Role: Dual decoder maps 2-bit address to chip-select lines; each decoder handles one memory bank pair. Use Value: Reduces glue logic count by replacing four discrete AND gates; maintains <6.2 ns setup-to-output timing for 12-MHz bus operation. |
Use Scenario: Expanding GPIO count on an ARM Cortex-M0+ MCU by enabling one of four I/O expander ICs (e.g., PCA9555). IC Role / Device Role / Timing Role: Acts as address decoder for I²C slave addresses; 2G/1G serve as secondary chip-select modifiers. Use Value: Enables 16-channel I/O expansion with zero additional address lines; 5.5-V input tolerance accommodates 5-V expander VDD. |
| Bus Demultiplexing | Logic State Machine Control |
|
Use Scenario: Routing a single serial data stream (e.g., UART TX) to one of four RS-232 transceivers based on host command. IC Role / Device Role / Timing Role: Configured as 1-to-4 demux: G inputs act as data line; A/B select destination channel. Use Value: Achieves sub-10 ns channel switching with no external latches; supports baud rates up to 1 Mbps without inter-symbol interference. |
Use Scenario: Controlling sequencing of four power rails (VDDIO, VDDA, VDDCORE, VDDPLL) during FPGA configuration. IC Role / Device Role / Timing Role: Generates mutually exclusive enable pulses synchronized to configuration clock edge via A/B inputs. Use Value: Ensures strict power-up order compliance; ±24 mA drive directly controls high-side MOSFET gate drivers without buffer stages. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual 2-to-4 decoder applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LV139ADR | LV family: wider VCC range (2.0–5.5 V), slower max tpd (11 ns @ 5 V), lower drive (±12 mA) | Better suited for pure 5-V legacy systems; not recommended for 1.65–1.8 V operation or high-speed 3.3-V buses. | Choose if system operates exclusively at 5 V and cost sensitivity outweighs speed requirements. |
| 74AHC139PW | AHC family: VCC = 2.0–5.5 V, tpd = 6.5 ns @ 5 V, higher ICC (40 µA), no 5.5-V input tolerance | Requires level-shifting for 5-V inputs in 3.3-V systems; higher static power limits use in battery-critical designs. | Select when interfacing only with 3.3-V or 5-V native logic and higher drive strength (±8 mA @ 5 V) is needed. |
Compared with SN74LV139ADR and 74AHC139PW, SN74LVC139ADRG4 uniquely balances 1.65–3.6 V operation, 5.5-V input tolerance, and 6.2 ns speed - making it optimal for modern mixed-voltage embedded controllers where voltage scaling and interoperability are critical.
Availability
SN74LVC139ADRG4 is available at Aetrix Electronics and suitable for industrial control panels, automotive body electronics modules, and IoT edge node designs requiring stable component supply and long-term manufacturability.
Supply support for SN74LVC139ADRG4 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and logic solutions, with decades of expertise in high-reliability logic families and industrial-grade qualification.
The SN74LVC139ADRG4 belongs to TI's LVC (Low-Voltage CMOS) logic portfolio, designed specifically for low-power, mixed-voltage digital interfacing in space-constrained embedded systems.
FAQ
What is the maximum operating frequency supported by SN74LVC139ADRG4?
The SN74LVC139ADRG4 does not specify a maximum clock frequency, as it is a combinational logic device. Its usable switching rate is determined by propagation delay: at VCC = 3.3 V, max tpd = 6.2 ns, supporting reliable operation in address decode paths up to ~80 MHz with appropriate setup/hold margins. System-level timing must account for board trace delays and fanout.
Can SN74LVC139ADRG4 be used with a 5-V microcontroller driving its inputs?
Yes. SN74LVC139ADRG4 inputs are rated for up to 5.5 V regardless of VCC, which may be as low as 1.65 V. This allows direct connection to 5-V microcontroller GPIOs without level shifters - a key feature for mixed-voltage system integration. Ensure VCC is within 1.65–3.6 V and outputs drive only LVC/LVT-compatible loads.
Is SN74LVC139ADRG4 pin-compatible with older 74LS139 or 74HC139 devices?
No. While functionally similar, SN74LVC139ADRG4 uses a different pinout than 74LS139 (e.g., 74LS139 places GND at Pin 8, VCC at Pin 16, but assigns Y0–Y3 differently). It is also not pin-compatible with 74HC139 due to differing terminal assignments for select and enable lines. Always verify against the SOIC-16 pin diagram in the SN74LVC139A datasheet before PCB layout.
Does SN74LVC139ADRG4 require pull-up or pull-down resistors on unused inputs?
Yes. Per TI's SCBA004 application report, all unused inputs of SN74LVC139ADRG4 must be tied to VCC or GND to prevent floating nodes that cause increased ICC, oscillation, or latch-up. Leaving inputs unconnected violates recommended operating conditions and may result in unpredictable output states or elevated power consumption.
What is the thermal performance of SN74LVC139ADRG4 in SOIC package?
SN74LVC139ADRG4 in SOIC (D) package has a junction-to-ambient thermal resistance (θJA) of 73°C/W. At 25°C ambient and typical ICC + IOL power dissipation (<5 mW), junction temperature remains well below 125°C. For sustained high-output-current operation (>10 mA per output), ensure adequate PCB copper area and airflow per TI's thermal design guidelines.
SN74LVC139ADRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- Type:
- Decoder/Demultiplexer
- Circuit:
- 1 x 2:4
- Independent Circuits:
- 2
- Current - Output High, Low:
- 24mA, 24mA
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
SN74LVC139ADRG4 FAQ
1.How can I place an order for SN74LVC139ADRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC139ADRG4 on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for SN74LVC139ADRG4 reliable?
The price and inventory of SN74LVC139ADRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC139ADRG4 is usually 5 days.
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SN74LVC139ADRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC139ADRG4 order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for SN74LVC139ADRG4?
For technical support, including SN74LVC139ADRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC139ADRG4 requirements.
6.How does Aetrix verify that SN74LVC139ADRG4 is sourced from the original manufacturer or authorized distributors?
All SN74LVC139ADRG4 products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that SN74LVC139ADRG4 meets industry standards.
7.What is the process for return or replacement of SN74LVC139ADRG4?
All SN74LVC139ADRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC139ADRG4, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The SN74LVC139ADRG4 part is unused and in its original packaging.
Return procedure for SN74LVC139ADRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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