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Texas Instruments SN74LVC139APWRE4
- Part No.:
- SN74LVC139APWRE4
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVC139APWRE4.pdf
- Description:
- IC DECODER/DEMUX 1X2:4 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,286
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Product details
Overview
SN74LVC139APWRE4 from Texas Instruments is a dual 2-line to 4-line decoder/demultiplexer in TSSOP-16 package, operating from 1.65 V to 3.6 V, with 6.2 ns max propagation delay at 3.3 V, fully buffered inputs, and 5.5 V-tolerant inputs-enabling level translation in mixed-voltage systems such as FPGA I/O expansion and microcontroller peripheral decoding.
For engineers reviewing the SN74LVC139APWRE4 datasheet, SN74LVC139APWRE4 pinout, SN74LVC139APWRE4 application, or SN74LVC139APWRE4 equivalent, key selection criteria include its dual-decoder architecture with active-low enable, 3.6 V absolute maximum supply rating, latch-up immunity (>250 mA), and compatibility with both 3.3 V and 5 V input logic families.
Technical Context
This device integrates two independent 2-to-4 line decoders sharing no internal logic coupling; each features an active-low enable (G) that doubles as a data input for demultiplexing. Inputs are fully buffered and 5.5 V tolerant, allowing direct interfacing with legacy 5 V TTL outputs while powered from 3.3 V or lower supplies.
Propagation delay is specified down to 1.65 V operation (20.6 ns at 1.8 V), with output drive capability of ±24 mA at 3 V and ground bounce (VOLP) <0.8 V at 3.3 V-critical for noise-sensitive digital control planes in industrial PLC modules and sensor interface boards.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 3.6 V - supports low-power portable designs and mixed-supply SoC interfaces without level shifters. |
| Max tpd | 6.2 ns at VCC = 3.3 V - enables reliable timing in high-speed address decoding for microcontrollers running at ≤50 MHz. |
| Input Voltage Tolerance | Up to 5.5 V - allows direct connection to 5 V logic outputs without external clamping or resistors. |
| Output Drive | ±24 mA at VCC = 3 V - sufficient to drive multiple LVC/LVT inputs or small LED indicators directly. |
| Latch-Up Immunity | >250 mA per JESD 17 - ensures robustness in noisy industrial environments with transient coupling. |
| ESD Protection | 2000-V HBM, 200-V MM, 1000-V CDM - meets IEC 61000-4-2 system-level ESD requirements for front-panel controls. |
Pinout & Package
TSSOP-16 (PW) package: 4.4 mm × 5.0 mm body, 0.65 mm pitch, 1.2 mm max height, lead-free NiPdAu finish, MSL Level-1 (260°C, unlimited floor life).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 15 | 1G, 2G | Active-low enable inputs - each controls one decoder; tied low enables full 4-output decode path. |
| 2, 3, 10, 11 | 1A, 1B, 2A, 2B | Binary select inputs - A/B define Y0–Y3 output activation per decoder (e.g., 1A=0,1B=1 → 1Y2=LOW). |
| 4–7, 12–14 | 1Y0–1Y3, 2Y0–2Y3 | Active-low decoded outputs - only one output per decoder is LOW per valid input combination. |
| 8 | GND | Ground reference - must be connected to system common; decoupling capacitor required near pin. |
| 16 | VCC | Supply voltage - requires local 100 nF ceramic bypass capacitor between VCC and GND. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent decoders | Enables simultaneous address decoding for two peripheral banks (e.g., SPI flash + I²C EEPROM) with separate enables. |
| 5.5 V-tolerant inputs | Eliminates need for external level translators when interfacing with 5 V microcontrollers or legacy logic. |
| Low dynamic power | ICC = 10 µA typical at 3.6 V - suitable for battery-backed real-time clock supervisor circuits. |
| High noise immunity | VIL = 0.35×VCC min, VIH = 0.65×VCC max - maintains logic integrity under ±200 mV rail noise in motor-drive PCBs. |
| Robust ESD/EMI performance | Meets IEC 61000-4-2 Level 4 (8 kV contact) when properly laid out - reduces need for external TVS diodes. |
Applications
| Industrial Control Panel | FPGA I/O Expansion |
|---|---|
|
Use Scenario: Decoding 2-bit DIP switch settings to activate one of four relay drivers in a programmable logic controller. IC Role / Device Role / Timing Role: Dual decoder provides parallel enable paths for isolated output stages; propagation delay <7 ns ensures deterministic response within 100 µs scan cycles. Use Value: Eliminates microcontroller GPIO overhead by offloading address decoding, freeing CPU cycles for PID loop execution. |
Use Scenario: Expanding 2-bit FPGA select lines to drive four distinct memory-mapped peripherals (ADC, DAC, UART, GPIO expander). IC Role / Device Role / Timing Role: Acts as address-space partitioner; active-low enables allow FPGA to gate each peripheral independently during configuration. Use Value: Reduces FPGA pin count by 8 (vs. direct 4-output routing) while maintaining cycle-accurate access timing. |
| Automotive Body Controller | Medical Sensor Hub |
|
Use Scenario: Routing CAN bus command bits to four lighting zones (headlights, fog lamps, turn signals, brake lights) in a LIN-based body module. IC Role / Device Role / Timing Role: Demultiplexer with G inputs driven by LIN frame payload bits; 5.5 V tolerance accommodates 5 V CAN transceiver I/O levels. Use Value: Enables single-CAN-message control of four discrete loads without software polling or additional MCU interrupts. |
Use Scenario: Selecting among four analog sensor signal chains (ECG, SpO₂, temperature, accelerometer) feeding a shared ADC channel. IC Role / Device Role / Timing Role: Analog multiplexer control logic - outputs drive CMOS switches; VOLP <0.8 V prevents false triggering of downstream comparators. Use Value: Provides glitch-free channel switching with <10 ns inter-channel skew, critical for synchronized multi-parameter acquisition. |
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 (2.0–5.5 V), higher ICC (20 µA), slower tpd (10 ns @ 5 V) | Better suited for pure 5 V systems; less optimal for sub-2 V battery-powered designs | Choose SN74LV139A only if 5 V operation is mandatory and speed <10 ns is acceptable. |
| 74LVC139AD | SOIC-16 package (6.2 mm × 10.2 mm), same electrical specs, higher θJA (73°C/W) | Preferred for through-hole prototyping or legacy board rework where TSSOP reflow is unavailable | Choose 74LVC139AD when manual soldering or thermal derating above 70°C is not required. |
Compared with SN74LVC139APWRE4, SN74LV139A trades speed and low-voltage operation for broader supply flexibility, while 74LVC139AD offers identical functionality in a larger, thermally less efficient package-making SN74LVC139APWRE4 optimal for space-constrained, low-power, mixed-voltage embedded designs.
Availability
SN74LVC139APWRE4 is available at Aetrix Electronics and suitable for industrial control panels, FPGA I/O expansion modules, automotive body controllers, and medical sensor hubs requiring stable component supply across extended production lifecycles.
Supply support for SN74LVC139APWRE4 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 connectivity technologies, with over 50 years of innovation in logic, power management, and signal chain ICs.
The SN74LVC139APWRE4 belongs to TI's LVC (Low-Voltage CMOS) logic family, designed specifically for high-speed, low-power, mixed-voltage digital interfacing in industrial, automotive, and communications equipment.
FAQ
What is the maximum supply voltage for SN74LVC139APWRE4?
The absolute maximum supply voltage for SN74LVC139APWRE4 is 6.5 V, but the recommended operating range is strictly 1.65 V to 3.6 V per TI's SCAS341O datasheet. Operation above 3.6 V risks parametric degradation and voids warranty compliance-even though input pins tolerate up to 5.5 V.
Can SN74LVC139APWRE4 interface directly with 5 V microcontrollers?
Yes, SN74LVC139APWRE4 supports 5.5 V-tolerant inputs while powered from 1.65–3.6 V supplies, enabling direct connection to 5 V microcontroller GPIOs without level shifters. However, outputs remain referenced to VCC (e.g., VOH ≈ VCC – 0.2 V), so downstream 5 V logic requires pull-up resistors or compatible input thresholds.
Does SN74LVC139APWRE4 support demultiplexing functions?
Yes, SN74LVC139APWRE4 supports demultiplexing via its active-low enable (G) inputs: applying data to G while holding A/B constant routes that signal to the selected Yx output. For example, driving 1G with serial data and fixing 1A/1B to "00" outputs the data on 1Y0 with inverted polarity.
What is the thermal resistance (θJA) of the SN74LVC139APWRE4 package?
The SN74LVC139APWRE4 in TSSOP-16 (PW) package has a junction-to-ambient thermal resistance (θJA) of 108°C/W, measured per JESD 51-7 on a standard 1-layer 1-oz copper test board. Real-world θJA drops significantly with proper PCB copper pour and thermal vias-TI recommends ≥4 thermal vias under the exposed pad (if present) for sustained >20 mA loads.
Is SN74LVC139APWRE4 pin-compatible with older 74LS139 devices?
No, SN74LVC139APWRE4 is not pin-compatible with 74LS139. While both are dual 2-to-4 decoders, 74LS139 uses a 16-pin DIP package with different pin assignments (e.g., VCC at pin 16, GND at pin 8), whereas SN74LVC139APWRE4 uses TSSOP-16 with VCC at pin 16 and GND at pin 8-but all signal pins (A/B/G/Yx) are rearranged. Board layout redesign is required.
SN74LVC139APWRE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 16-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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
SN74LVC139APWRE4 FAQ
1.How can I place an order for SN74LVC139APWRE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC139APWRE4 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 SN74LVC139APWRE4 reliable?
The price and inventory of SN74LVC139APWRE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC139APWRE4 is usually 5 days.
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Once your SN74LVC139APWRE4 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 SN74LVC139APWRE4?
For technical support, including SN74LVC139APWRE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC139APWRE4 requirements.
6.How does Aetrix verify that SN74LVC139APWRE4 is sourced from the original manufacturer or authorized distributors?
All SN74LVC139APWRE4 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 SN74LVC139APWRE4 meets industry standards.
7.What is the process for return or replacement of SN74LVC139APWRE4?
All SN74LVC139APWRE4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC139APWRE4, 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 SN74LVC139APWRE4 part is unused and in its original packaging.
Return procedure for SN74LVC139APWRE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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