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Texas Instruments SN74LVC139APWG4
- Part No.:
- SN74LVC139APWG4
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVC139APWG4.pdf
- Description:
- IC DECODER/DEMUX 1X2:4 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:4,011
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Product details
Overview
SN74LVC139APWG4 from Texas Instruments is a dual 2-line to 4-line decoder/demultiplexer operating from 1.65 V to 3.6 V, featuring active-low enable inputs, 6.2 ns max propagation delay at 3.3 V, and 5.5 V-tolerant inputs-enabling mixed-voltage translation in logic interface and address decoding applications.
For engineers reviewing the SN74LVC139APWG4 datasheet, SN74LVC139APWG4 pinout, SN74LVC139APWG4 application, or SN74LVC139APWG4 equivalent, key selection considerations include its TSSOP-16 package, dual independent decoder architecture, 3.6 V absolute maximum supply rating, latch-up immunity (>250 mA), and compatibility with both 3.3 V and 5 V input drive sources.
Technical Context
This device integrates two fully buffered, functionally identical 2-to-4 decoders sharing no internal signal paths-each with separate select (A/B) and active-low enable (G) inputs. Its logic operates on positive-logic decoding with active-low outputs (Y0–Y3), where only one output goes low per valid input combination.
The SN74LVC139APWG4 supports voltage-level translation via 5.5 V-tolerant inputs while driving 3.3 V-compatible outputs, and exhibits robust noise immunity with typical output ground bounce <0.8 V and VOH undershoot >2 V at VCC = 3.3 V and TA = 25°C.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - Enables operation across modern low-voltage logic domains including 1.8 V, 2.5 V, and 3.3 V systems. |
| Max tpd | 6.2 ns at VCC = 3.3 V - Supports high-speed address decoding and control path timing in microcontroller peripheral interfaces. |
| Input Voltage Tolerance | Up to 5.5 V - Allows direct interfacing with legacy 5 V logic without level-shifting circuitry. |
| Output Drive | ±24 mA at VCC = 3 V - Sufficient to drive multiple LVC/LVT inputs or small capacitive loads without buffering. |
| Latch-Up Immunity | >250 mA per JESD 17 - Ensures robustness against transient current faults in industrial and automotive-adjacent environments. |
| ESD Protection | 2000-V HBM, 200-V MM, 1000-V CDM - Meets stringent reliability requirements for handling and board assembly. |
Pinout & Package
TSSOP-16 (PW) package: 5.0 mm × 4.4 mm body, 0.65 mm lead pitch, 1.2 mm max height, gull-wing leads, RoHS-compliant NiPdAu finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | 1G | Active-low enable for Decoder 1 - When high, all Y0–Y3 outputs are forced high (disabled); enables demux data routing when used as strobe. |
| 2 | 1A | LSB select input for Decoder 1 - Determines binary address bit A0 in 2-bit decode sequence. |
| 3 | 1B | MSB select input for Decoder 1 - Determines binary address bit A1 in 2-bit decode sequence. |
| 4–7 | 1Y0–1Y3 | Active-low decoded outputs for Decoder 1 - Exactly one output goes low per unique (1G,1B,1A) combination; open-drain compatible behavior with pull-ups. |
| 8 | GND | Ground reference - Shared return path for both decoders; must be low-impedance for noise control. |
| 9–12 | 2Y0–2Y3 | Active-low decoded outputs for Decoder 2 - Independent of Decoder 1; supports parallel address expansion or dual-channel routing. |
| 13 | 2B | MSB select input for Decoder 2 - Electrically isolated from 1B; allows independent addressing of two memory or I/O blocks. |
| 14 | 2A | LSB select input for Decoder 2 - Used with 2B and 2G to generate second set of four decoded lines. |
| 15 | 2G | Active-low enable for Decoder 2 - Independently controls Decoder 2 output state; enables selective channel activation. |
| 16 | VCC | Positive supply - Powers both decoders; bypassing with 0.1 µF ceramic capacitor near pin is required for stable switching. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent decoders | Two completely isolated 2-to-4 decode blocks share only VCC/GND - enables concurrent address decoding for separate peripherals without crosstalk. |
| 5.5 V-tolerant inputs | Accepts 0–5.5 V input signals while powered from 1.65–3.6 V - eliminates external level shifters in mixed-supply systems (e.g., 5 V MCU controlling 3.3 V FPGA config). |
| Low dynamic power | ICC = 10 µA typical at VCC = 3.6 V, all inputs static - reduces quiescent power in battery-backed or always-on control logic. |
| High noise immunity | VOLP < 0.8 V and VOHV > 2 V at VCC = 3.3 V - suppresses switching noise-induced glitches during high-speed transitions. |
| Normalized load drive | Each input presents only one LVC unit load - simplifies fanout calculation and ensures predictable timing across cascaded stages. |
Applications
| Memory Address Decoding | Peripheral Select Logic |
|---|---|
|
Use Scenario: Selecting one of four SRAM or EEPROM chips in an embedded microcontroller system using two address bits. IC Role / Device Role / Timing Role: Dual decoder maps A1/A0 to chip-select lines; each decoder handles one memory bank pair. Use Value: Reduces PCB routing complexity by replacing discrete gates; 6.2 ns tpd ensures setup/hold compliance with 33 MHz bus timing. |
Use Scenario: Enabling UART, SPI, I²C, or GPIO expanders from a single microcontroller port. IC Role / Device Role / Timing Role: Acts as peripheral selector - G inputs synchronized to control strobes, outputs drive /CS pins. Use Value: Eliminates software-based bit-banging delays; 5.5 V-tolerant inputs allow direct connection to 5 V MCU GPIOs. |
| Logic-Level Translation | LED Matrix Row Drivers |
|
Use Scenario: Interfacing a 5 V sensor subsystem with a 3.3 V FPGA or SoC. IC Role / Device Role / Timing Role: Translates 5 V address/control signals into 3.3 V-compatible decoded enables. Use Value: No external resistors or translators needed - preserves signal integrity and reduces BOM count. |
Use Scenario: Driving rows of a 4×4 LED multiplexed display using two microcontroller outputs. IC Role / Device Role / Timing Role: Converts row address bits into active-low row selects; outputs sink up to 24 mA per line. Use Value: Direct LED drive capability avoids external transistors; low VOL ensures full brightness at 3.3 V supply. |
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 |
|---|---|---|---|
| SN74LV139A | Wider VCC range (1.0 V to 5.5 V), higher ICC (20 µA typ), slower tpd (11 ns max at 3.3 V) | Better suited for ultra-low-voltage (1.2 V) or 5 V-only systems; less ideal for speed-critical 3.3 V designs | Choose SN74LV139A only if operating below 1.65 V or above 3.6 V is required. |
| 74LVC139D | Same logic and specs, but SOIC-16 (D) package - larger footprint (10.3 mm × 5.3 mm), higher θJA (73°C/W) | Preferred for through-hole prototyping or legacy board reuse; not suitable for space-constrained layouts | Select 74LVC139D when TSSOP assembly infrastructure is unavailable or thermal margin exceeds 10°C/W. |
Compared with SN74LV139A and 74LVC139D, the SN74LVC139APWG4 delivers optimal balance of speed (6.2 ns), compactness (TSSOP-16), and 5.5 V input tolerance - making it the preferred choice for modern 3.3 V embedded control and interface logic where layout density and timing margin are critical.
Availability
SN74LVC139APWG4 is available at Aetrix Electronics and suitable for memory address decoding, peripheral selection logic, logic-level translation, LED matrix row driving, and FPGA configuration interface applications requiring stable component supply and long-term industrial availability.
Supply support for SN74LVC139APWG4 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 over 50 years of innovation in high-reliability digital ICs.
The SN74LVC139APWG4 belongs to TI's LVC logic family-designed for low-voltage, high-speed, mixed-signal interface applications in industrial, communications, and computing systems where power efficiency and signal integrity are essential.
FAQ
What is the maximum supply voltage for SN74LVC139APWG4?
The absolute maximum supply voltage (VCC) for SN74LVC139APWG4 is 6.5 V, but the recommended operating range is strictly 1.65 V to 3.6 V per TI's SCAS341O datasheet. Operating outside this range may cause functional failure or accelerated wear. The SN74LVC139APWG4 is not rated for continuous 5 V operation, though its inputs tolerate up to 5.5 V.
Does SN74LVC139APWG4 support level shifting between 5 V and 3.3 V systems?
Yes - SN74LVC139APWG4 accepts input voltages up to 5.5 V while operating from a 1.65–3.6 V VCC supply, enabling direct 5 V-to-3.3 V logic translation without external components. Its outputs swing rail-to-rail within the VCC domain, making it ideal for interfacing legacy 5 V controllers with modern 3.3 V peripherals. This behavior is explicitly confirmed in the "Inputs Accept Voltages to 5.5 V" feature and VI specification table.
What is the pinout configuration of SN74LVC139APWG4?
SN74LVC139APWG4 uses a standard TSSOP-16 pinout: Pin 1 = 1G, Pins 2–3 = 1A/1B, Pins 4–7 = 1Y0–1Y3, Pin 8 = GND, Pins 9–12 = 2Y0–2Y3, Pin 13 = 2B, Pin 14 = 2A, Pin 15 = 2G, Pin 16 = VCC. This matches TI's PW package drawing (PW0016A) and is verified in the Terminal Assignments section of the datasheet. No NC pins are present in this variant.
Can SN74LVC139APWG4 drive LEDs directly?
Yes - SN74LVC139APWG4 can directly sink up to 24 mA per output (IOL = 24 mA at VCC = 3 V), sufficient to drive standard 20 mA LEDs in common-anode configurations. Its active-low outputs and guaranteed VOL ≤ 0.55 V at 24 mA ensure minimal voltage drop and full brightness. However, current-limiting resistors must still be used in series with each LED to set precise current.
Is SN74LVC139APWG4 pin-compatible with other LVC139 variants?
Yes - SN74LVC139APWG4 shares identical pinout and logic functionality with all LVC139 variants in TSSOP-16 (e.g., SN74LVC139APWR, SN74LVC139APWT), differing only in packaging, reel quantity, and marking. It is not pin-compatible with SOIC (D), SSOP (DB), or VQFN (RGY) variants due to different footprints and lead arrangements, despite identical logic behavior.
SN74LVC139APWG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tube
- 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-TSSOP
SN74LVC139APWG4 FAQ
1.How can I place an order for SN74LVC139APWG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC139APWG4 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 SN74LVC139APWG4 reliable?
The price and inventory of SN74LVC139APWG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC139APWG4 is usually 5 days.
3.What payment methods are accepted for SN74LVC139APWG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC139APWG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC139APWG4?
SN74LVC139APWG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC139APWG4 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 SN74LVC139APWG4?
For technical support, including SN74LVC139APWG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC139APWG4 requirements.
6.How does Aetrix verify that SN74LVC139APWG4 is sourced from the original manufacturer or authorized distributors?
All SN74LVC139APWG4 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 SN74LVC139APWG4 meets industry standards.
7.What is the process for return or replacement of SN74LVC139APWG4?
All SN74LVC139APWG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC139APWG4, 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 SN74LVC139APWG4 part is unused and in its original packaging.
Return procedure for SN74LVC139APWG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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