My Inquiry
My Account
Nexperia USA Inc. 74LVC139BQ,115
- Part No.:
- 74LVC139BQ,115
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-VFQFN Exposed Pad
- Datasheet:
-
74LVC139BQ,115.pdf
- Description:
- IC DECODER/DEMUX 1X2:4 16DHVQFN
- Quantity:
- Payment:
- Shipping:
Inventory:1,288
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
74LVC139BQ,115 from Nexperia is a dual 2-to-4 line decoder/demultiplexer in DHVQFN16 package, operating from 1.2 V to 3.6 V supply, with overvoltage-tolerant inputs up to 5.5 V and Schmitt-trigger inputs for noise immunity. It features two independent decoders, each with active-low enable (nE), mutually exclusive active-low outputs (nY0–nY3), and supports mixed-voltage interfacing between 3.3 V and 5 V systems - used in address decoding for memory-mapped peripherals and I/O expansion in industrial microcontroller subsystems.
For engineers reviewing the 74LVC139BQ,115 datasheet, 74LVC139BQ,115 pinout, 74LVC139BQ,115 application, or 74LVC139BQ,115 equivalent, key selection criteria include its dual-decoder architecture, 1.2 V minimum VCC operation, -40 °C to +125 °C temperature range, 2.5 ns typical propagation delay at 3.3 V, and DHVQFN16 thermal-enhanced footprint for space-constrained PCB layouts.
Technical Context
This device implements two independent CMOS-based 2-to-4 decoders, each accepting two binary address inputs (nA0, nA1) and one active-low enable (nE); when nE is HIGH, all four outputs are forced HIGH. The Schmitt-trigger input buffers provide hysteresis (typ. 0.3 V at 3.3 V), enabling robust operation with slow-rising signals and reducing susceptibility to noise-induced glitches.
Each decoder supports demultiplexing mode by using nE as data input while holding nA0/nA1 constant - routing a single input signal to one of four outputs. Outputs drive 50 Ω transmission lines at 125 °C and comply with JEDEC standards JESD8-7A, JESD8-5A, and JESD8-C/JESD36 across voltage ranges.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.2 V to 3.6 V - enables direct integration into ultra-low-voltage logic domains and battery-powered systems without level shifters. |
| Input Voltage Tolerance | Up to 5.5 V - allows safe interfacing with legacy 5 V TTL/CMOS outputs without external clamping or resistors. |
| Propagation Delay | 2.5 ns (typ.) at VCC = 3.3 V - supports high-speed address decoding in sub-400 MHz digital subsystems. |
| Operating Temperature | -40 °C to +125 °C - qualified for under-hood automotive modules, industrial PLCs, and extended-temperature embedded controllers. |
| Output Drive | ±24 mA at VCC = 3.0 V - sufficient to directly drive multiple 74LVC inputs or terminate 50 Ω lines without buffering. |
| ESD Protection | HBM > 2000 V, CDM > 1000 V - meets industrial-grade reliability requirements per ANSI/ESDA/JEDEC JS-001 & JS-002. |
| Power Dissipation | 500 mW max at Tamb ≤ 125 °C - derates linearly at 11.2 mW/K above 106 °C for DHVQFN16 package. |
Pinout & Package
DHVQFN16 (SOT763-1) package: 2.5 × 3.5 × 0.85 mm body, no leads, thermally enhanced exposed pad (terminal 1 index area), 16 terminals, compatible with standard QFN reflow profiles and automated optical inspection.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 | GND (exposed pad) | Thermal and electrical ground reference; floating or GND-connected per layout guidelines - critical for thermal performance and noise immunity. |
| 2 | 1Y3 | Active-low output of first decoder - asserted when 1A1=0, 1A0=0, and 1E=L; used for chip-select generation. |
| 3 | 2Y2 | Active-low output of second decoder - asserted when 2A1=1, 2A0=0, and 2E=L; enables selective peripheral activation. |
| 4 | 1Y2 | Active-low output of first decoder - asserted when 1A1=1, 1A0=0, and 1E=L; supports 4-channel address decode mapping. |
| 5 | 2Y1 | Active-low output of second decoder - asserted when 2A1=0, 2A0=1, and 2E=L; provides independent channel control. |
| 6 | 1Y1 | Active-low output of first decoder - asserted when 1A1=0, 1A0=1, and 1E=L; used in multiplexed bus arbitration. |
| 7 | 2Y0 | Active-low output of second decoder - asserted when 2A1=0, 2A0=0, and 2E=L; primary enable path for low-latency peripherals. |
| 8 | 1Y0 | Active-low output of first decoder - asserted when 1A1=0, 1A0=0, and 1E=L; commonly assigned to boot device selection. |
| 9 | 2A1 | Address input for second decoder - accepts 3.3 V or 5 V logic levels; Schmitt-trigger input ensures clean edge detection. |
| 10 | 1A1 | Address input for first decoder - synchronized with 1A0 to select one of four outputs; immune to slow-rising clock or reset signals. |
| 11 | 2A0 | Address input for second decoder - forms LSB of 2-bit address pair; tolerant of noisy PCB traces due to hysteresis. |
| 12 | 1A0 | Address input for first decoder - forms LSB of first 2-bit address; enables compact address-space partitioning. |
| 13 | 2E | Active-low enable for second decoder - when HIGH, forces 2Y0–2Y3 HIGH; used as data input in 1-to-4 demux mode. |
| 14 | GND | Digital ground reference - must be connected to system ground plane; separates analog-sensitive sections in mixed-signal designs. |
| 15 | 1E | Active-low enable for first decoder - controls entire first decoder block; enables power-gating via MCU GPIO during idle states. |
| 16 | VCC | Positive supply rail - decoupled locally with 100 nF ceramic capacitor; supports dynamic current bursts up to ±50 mA per output. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent decoders | Two fully isolated 2-to-4 decoding blocks on one die - eliminates need for two discrete packages, saving board space and BOM count. |
| Schmitt-trigger inputs | Input hysteresis ≥ 0.3 V at 3.3 V - rejects noise on long traces or unshielded cables without external RC filtering. |
| Mutually exclusive outputs | Only one nYx output active LOW per decoder at any time - prevents bus contention in memory-mapped I/O systems. |
| Overvoltage-tolerant inputs | VI up to 5.5 V with VIK ≥ -0.5 V - enables direct connection to 5 V microcontrollers without level translators. |
| Wide temperature range | Specified from -40 °C to +125 °C - validated for continuous operation in sealed enclosures with minimal airflow. |
| JEDEC-compliant voltage operation | Meets JESD8-7A (1.65–1.95 V), JESD8-5A (2.3–2.7 V), and JESD8-C/JESD36 (2.7–3.6 V) - ensures interoperability across multi-rail SoC platforms. |
Applications
| Memory Address Decoding | I/O Port Expansion |
|---|---|
|
Use Scenario: Selecting among four SRAM or Flash memory banks in an ARM Cortex-M7-based industrial controller. IC Role / Device Role / Timing Role: Dual decoder maps 2-bit address bus to four independent /CS lines, with enable controlled by peripheral enable register bit. Use Value: Reduces FPGA or MCU GPIO usage by 6 pins versus discrete inverters and AND gates; propagation delay < 3 ns ensures setup/hold timing closure at 100 MHz bus clocks. |
Use Scenario: Expanding GPIO count for sensor interface in a smart HVAC controller with limited MCU pins. IC Role / Device Role / Timing Role: Acts as demultiplexer: nE = data, nA0/nA1 = select lines - routes one serial data stream to four parallel sensor read-enable lines. Use Value: Enables time-multiplexed sensor polling without additional shift registers; Schmitt-trigger inputs tolerate long flex-cable runs from remote sensors. |
| Bus Arbitration Logic | Legacy System Interface |
|
Use Scenario: Managing access priority among four CAN transceivers sharing a single microcontroller UART interface. IC Role / Device Role / Timing Role: First decoder selects active transceiver; second decoder enables corresponding TX/RX direction control logic. Use Value: Eliminates need for programmable logic; mutual exclusivity guarantees only one transceiver drives bus at a time, preventing signal collisions. |
Use Scenario: Interfacing a modern 3.3 V FPGA with legacy 5 V industrial I/O modules (e.g., optocoupler-based PLC inputs). IC Role / Device Role / Timing Role: Level-translating decoder: 5 V address/data signals drive inputs; 3.3 V outputs select 5 V peripheral chips via open-drain buffers. Use Value: Input overvoltage tolerance removes external clamping diodes; 1.2 V min VCC allows coexistence with ultra-low-power sleep domains. |
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 |
|---|---|---|---|
| SN74LVC139APWR | TSSOP16 package (SOT403-1); 8.5 mW/K thermal derating above 91 °C; identical logic function and DC specs. | Lower thermal resistance than SO16 but higher than DHVQFN16; less suitable for high-density, high-ambient-temperature layouts. | Select when existing PCB uses TSSOP footprints or when manual rework accessibility is prioritized over thermal performance. |
| 74AHC139PW,118 | Higher VCC range (2 V to 5.5 V); faster tpd (1.7 ns typ. at 5 V); no 5.5 V input tolerance below 2 V VCC. | Not usable below 2 V; incompatible with 1.2–1.8 V logic domains; requires separate 5 V rail for full speed. | Choose only if system operates strictly at 3.3 V or 5 V and demands sub-2 ns propagation delay - not drop-in compatible for low-voltage designs. |
Compared with SN74LVC139APWR and 74AHC139PW,118, the 74LVC139BQ,115 uniquely combines ultra-low-voltage operation (1.2 V), 5.5 V input tolerance, and DHVQFN16 thermal efficiency - making it optimal for space-constrained, wide-input-voltage industrial controllers where both power efficiency and noise immunity are critical.
Availability
74LVC139BQ,115 is available at Aetrix Electronics and suitable for industrial automation controllers, automotive body electronics modules, and medical diagnostic equipment requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74LVC139BQ,115 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
Nexperia is a global semiconductor expert delivering high-performance logic, discrete, and MOSFET solutions optimized for efficiency, reliability, and miniaturization in high-volume applications.
The 74LVC series targets low-voltage, mixed-signal embedded systems - designed specifically for robust operation in noisy industrial environments with wide supply margins and legacy voltage interoperability.
FAQ
Can the 74LVC139BQ,115 operate with a 1.2 V supply while interfacing with 5 V inputs?
Yes. The device is fully specified down to VCC = 1.2 V and supports input voltages up to 5.5 V regardless of supply level. This allows direct connection to 5 V microcontrollers or sensors without level-shifting circuitry, while maintaining correct logic thresholds and output drive capability at the 1.2 V rail.
What is the purpose of the exposed pad (terminal 1) in the DHVQFN16 package?
The exposed pad serves as the primary thermal path to the PCB ground plane. It is electrically connected to GND internally but has no mandatory solder requirement; if soldered, it must remain floating or tied to GND. Proper thermal land design improves power dissipation by up to 30% compared to non-thermal QFN variants.
How does the Schmitt-trigger input affect timing analysis in a demultiplexer configuration?
Schmitt-trigger inputs introduce hysteresis (~0.3 V at 3.3 V), which increases effective input noise margin but adds negligible delay (< 0.2 ns) to propagation paths. In demux mode, this ensures reliable data latching even with slow or noisy enable signals - eliminating need for external debouncing circuits in industrial sensor interfaces.
Is the 74LVC139BQ,115 pin-compatible with other 74LVC139 package variants?
No. While functionally identical, the DHVQFN16 (SOT763-1) pinout differs significantly from SO16 (SOT109-1) and TSSOP16 (SOT403-1). Pin assignments for 1Y0–1Y3, 2Y0–2Y3, and enable inputs are rearranged to accommodate the QFN layout - requiring dedicated PCB footprint and netlist mapping.
74LVC139BQ,115 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74LVC
- Package/Case:
- 16-VFQFN Exposed Pad
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Decoder/Demultiplexer
- Circuit:
- 1 x 2:4
- Independent Circuits:
- 2
- Current - Output High, Low:
- 24mA, 24mA
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-DHVQFN (2.5x3.5)
74LVC139BQ,115 FAQ
1.How can I place an order for 74LVC139BQ,115 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVC139BQ,115 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 74LVC139BQ,115 reliable?
The price and inventory of 74LVC139BQ,115 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVC139BQ,115 is usually 5 days.
3.What payment methods are accepted for 74LVC139BQ,115?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVC139BQ,115 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVC139BQ,115?
74LVC139BQ,115 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVC139BQ,115 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 74LVC139BQ,115?
For technical support, including 74LVC139BQ,115 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVC139BQ,115 requirements.
6.How does Aetrix verify that 74LVC139BQ,115 is sourced from the original manufacturer or authorized distributors?
All 74LVC139BQ,115 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 74LVC139BQ,115 meets industry standards.
7.What is the process for return or replacement of 74LVC139BQ,115?
All 74LVC139BQ,115 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVC139BQ,115, 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 74LVC139BQ,115 part is unused and in its original packaging.
Return procedure for 74LVC139BQ,115:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74LVC139BQ,115 Tags
-
SN74HC138DR
Texas Instruments
-
TC7SB3157CFU,LF(CT
Toshiba Semiconductor and Storage
-
74CBTLV3257PW,118
Nexperia USA Inc.
-
SN74CBTLV3257PWR
Texas Instruments
-
74CBTLV3257GUX
Nexperia USA Inc.
-
74HC154BQ,118
Nexperia USA Inc.
-
P3S0200GMX
NXP USA Inc.
-
SN74CB3Q3245PWR
Texas Instruments
-
SN74CB3Q3257RGYR
Texas Instruments
-
TCA9543APWR
Texas Instruments
-
TCA9546APWR
Texas Instruments
-
SN74HC138N
Texas Instruments
Tech Hub
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
Jumper cables guide covering safe connection order, red and black clamp placement, final ground connection, cable gauge, length, clamp quality, copper vs CCA cables, jump starter comparison and battery…
LDO regulator guide covering low dropout voltage, power dissipation, thermal design, PSRR, output noise, capacitor stability, adjustable LDO circuits, LDO vs buck converter and datasheet selection chec…
Conditional Access Module guide covering CAM meaning, CI/CI+ interface, smart card authorization, DVB security workflow, TV and set-top box compatibility, internal electronics, ESD protection, connecto…
Guide to electronic component obsolescence covering EOL risk, PCN/PDN notices, last-time buy planning, replacement options, form-fit-function validation, counterfeit risk and BOM lifecycle management.
18650 battery guide covering lithium-ion cell basics, 3.6V/3.7V voltage, 4.2V charging, mAh and Wh capacity, protected cells, chargers, BMS, series-parallel packs, holders, welding and sourcing checks.…
Hall effect sensor guide covering working principle, linear and digital sensors, Arduino circuits, current sensing, speed detection, automotive applications, A3144 examples, signal filtering and datash…
Product Change Notification guide for electronic components, covering PCN meaning, PCN vs PDN/EOL, common change types, risk levels, form-fit-function review, engineering validation, BOM control, LTB/L…
A practical guide to blend door actuators, covering HVAC function, symptoms, location, AC and heater issues, reset and calibration, replacement cost, electrical diagnosis, compatibility checks, and rep…
