My Inquiry
My Account
Texas Instruments 74LVC1G139DCURE4
- Part No.:
- 74LVC1G139DCURE4
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 8-VFSOP (0.091", 2.30mm Width)
- Datasheet:
-
74LVC1G139DCURE4.pdf
- Description:
- IC DECODER/DEMUX 1X2:4 8VSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,232
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
74LVC1G139DCURE4 from Texas Instruments is a single 2-to-4 line decoder IC with active-low outputs, designed for high-speed memory decoding and data routing in 1.65-V to 5.5-V systems. It features 4.9 ns maximum propagation delay at 3.3 V/15 pF, ±24-mA output drive at 3.3 V, and Ioff support for live insertion and partial-power-down operation. It is used in SSDs, AV receivers, and HDTVs for address decoding.
For engineers reviewing the 74LVC1G139DCURE4 datasheet, 74LVC1G139DCURE4 pinout, 74LVC1G139DCURE4 application, or 74LVC1G139DCURE4 equivalent, this page delivers verified technical context, validated pin functions, real-world application mappings, and confirmed alternative parts - all grounded in TI's SCES602D specification and orderable-part documentation.
Technical Context
The 74LVC1G139DCURE4 implements a CMOS-based 2-bit binary decoder where input B is the MSB and outputs Y0–Y3 are active-low. Its logic follows a strict truth table: only one output goes low per unique A/B combination, with all others high. No enable input is present - decoding is always active.
It supports voltage-level translation: inputs tolerate up to 5.5 V regardless of VCC (1.65–5.5 V), enabling interfacing with higher-voltage controllers while powering from lower rails. The Ioff feature disables outputs during power-down, blocking back-drive current and supporting hot-plug scenarios.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65 V to 5.5 V - enables direct integration into mixed-voltage systems (e.g., 1.8-V core + 3.3-V I/O). |
| tpd (max) | 4.9 ns at 3.3 V/15 pF - ensures minimal added latency in high-speed address decoding paths. |
| IOL / IOH | ±24 mA at 3.3 V - drives multiple LVC/LVT inputs or small LED loads without external buffers. |
| Ioff Current | ±5 µA max - prevents damaging back-current during partial power-down or hot-swap events. |
| Input Tolerance | 5.5 V absolute max on A/B - allows safe interfacing with 5-V controllers even when VCC = 1.8 V. |
| ESD Rating | ±2000 V HBM - meets industrial-grade robustness requirements for board-level handling. |
Pinout & Package
74LVC1G139DCURE4 is packaged in an 8-pin VSSOP (DCU) with 2.30 mm × 2.00 mm body size and 0.5-mm lead pitch. This ultra-compact package supports high-density PCB layouts and automated assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| A (Pin 1) | Address input, bit 0 | LSB of 2-bit address; determines Y0/Y1 vs Y2/Y3 group selection. |
| B (Pin 2) | Address input, bit 1 | MSB of 2-bit address; selects between Y0/Y1 (B = L) or Y2/Y3 (B = H). |
| Y3 (Pin 3) | Active-low decoded output | Asserted low only when A = H and B = H - decodes binary '11'. |
| GND (Pin 4) | Ground reference | Return path for all internal logic and output currents; must be low-impedance. |
| Y2 (Pin 5) | Active-low decoded output | Asserted low only when A = L and B = H - decodes binary '10'. |
| Y1 (Pin 6) | Active-low decoded output | Asserted low only when A = H and B = L - decodes binary '01'. |
| Y0 (Pin 7) | Active-low decoded output | Asserted low only when A = L and B = L - decodes binary '00'. |
| VCC (Pin 8) | Supply voltage | Power rail for internal logic and output drivers; requires local 0.1-µF bypass capacitor. |
Key Features
| Feature | Design Value |
|---|---|
| Ultra-fast decoding | 4.9 ns max tpd at 3.3 V enables use in sub-200-MHz memory decode timing budgets. |
| Voltage translation support | 5.5-V-tolerant inputs allow connection to legacy 5-V buses while operating from 1.8-V or 2.5-V supplies. |
| Ioff partial-power-down | Prevents backflow current during power sequencing or hot-swap - critical for modular SSD and server designs. |
| Low static power | 10 µA max ICC ensures negligible quiescent load in battery-backed or always-on subsystems. |
| NanoFree™ packaging | VSSOP (DCU) eliminates package substrate - reduces thermal resistance (RθJA = 195°C/W) and board space. |
Applications
| SSD Address Decoding | AV Receiver Chip Select |
|---|---|
|
Use Scenario: Decoding address bits A14/A15 in client SSDs to generate four independent chip-select signals for NAND die arrays. IC Role / Device Role / Timing Role: 2-to-4 line decoder mapping 2-bit bus segment to active-low chip-select lines with <5 ns propagation delay. Use Value: Eliminates need for larger 74LVC139 or discrete logic, reducing BOM count and layout area in space-constrained M.2 modules. |
Use Scenario: Generating four discrete audio processor enable signals in multi-zone AV receivers based on mode-select bits. IC Role / Device Role / Timing Role: Active-low decoder driving enable inputs of audio DSPs, DACs, and amplifier controllers. Use Value: Leverages ±24-mA drive to directly control multiple downstream enables without level-shifting or buffering. |
| HDTV Memory Mapping | Industrial Tablet I/O Expansion |
|
Use Scenario: Translating HDMI controller address bits to select frame buffer banks or display interface peripherals in 4K HDTVs. IC Role / Device Role / Timing Role: High-speed address decoder ensuring zero-cycle decode latency in video pipeline timing paths. Use Value: Matches 3.3-V I/O voltage of HDMI PHY while tolerating 5-V test-mode signals via overvoltage-tolerant inputs. |
Use Scenario: Expanding GPIO-controlled peripheral selection in ruggedized enterprise tablets (e.g., barcode scanner, RFID reader, serial module). IC Role / Device Role / Timing Role: Low-power decoder enabling one of four peripheral interfaces using two MCU GPIOs. Use Value: Ioff protection allows safe hot-plug of expansion modules without disrupting main SoC power domain. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar 2-to-4 decoder applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC1G139DCTR | Same silicon, SM8 (DCT) package (2.95 mm × 2.80 mm); 3000-unit reel; identical electrical specs. | Requires PCB footprint change - larger pad layout and 0.65-mm pitch vs. DCU's 0.5-mm pitch. | Select when board layout accommodates larger package or when sourcing preference favors SM8 tape-and-reel format. |
| 74LVC1G139YZPR | Same functionality in DSBGA (YZP) package (1.91 mm × 0.91 mm); 3000-unit reel; same VCC/Ioff/tpd specs. | Bottom-terminal BGA mounting - demands microvia routing and reflow profile validation not needed for VSSOP. | Choose for ultra-miniaturized designs (e.g., wearable SSD modules) where 40% smaller footprint justifies BGA assembly complexity. |
Compared with SN74LVC1G139DCTR and 74LVC1G139YZPR, the 74LVC1G139DCURE4 offers the optimal balance of compactness, manufacturability, and supply chain readiness - its VSSOP package fits standard SMT lines without BGA rework or large-footprint redesigns.
Availability
74LVC1G139DCURE4 is available at Aetrix Electronics and suitable for SSDs, AV receivers, HDTVs, and industrial tablets requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for 74LVC1G139DCURE4 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 delivering analog, embedded processing, and connectivity solutions with emphasis on reliability, scalability, and system-level integration.
The SN74LVC1G139 product line delivers single-gate logic in ultra-small packages for space-constrained, low-power, high-speed digital interfaces - targeting memory subsystems, consumer AV, and industrial edge devices.
FAQ
What is the function of the 74LVC1G139DCURE4?
The 74LVC1G139DCURE4 is a 2-to-4 line decoder with active-low outputs. It accepts two binary address inputs (A and B) and asserts exactly one of four outputs (Y0–Y3) low based on the input combination. It contains no enable pin and operates continuously across its 1.65-V to 5.5-V supply range. All logic behavior and timing are fully specified in TI's SCES602D datasheet.
Does the 74LVC1G139DCURE4 support level shifting?
Yes - the 74LVC1G139DCURE4 supports down-translation: its inputs tolerate up to 5.5 V regardless of VCC (1.65–5.5 V), allowing connection to 5-V controllers while powered from 1.8-V or 2.5-V rails. Outputs swing from GND to VCC, so full bidirectional level shifting requires external circuitry.
What is the maximum output drive capability of the 74LVC1G139DCURE4?
The 74LVC1G139DCURE4 delivers ±24 mA per output at VCC = 3.3 V, as specified in the Electrical Characteristics table of SCES602D. At 1.65 V, it provides ±4 mA; at 5 V, ±32 mA. Total device output current must not exceed ±100 mA, and individual output current must stay within ±50 mA limits.
How does Ioff protection work in the 74LVC1G139DCURE4?
The Ioff circuitry in the 74LVC1G139DCURE4 disables all outputs when VCC = 0 V, limiting leakage current to ±5 µA maximum. This prevents back-driving current from live signal lines into a powered-down section of the system - essential for hot-plug SSD modules and modular industrial hardware where power domains sequence independently.
Is the 74LVC1G139DCURE4 pin-compatible with other variants in the SN74LVC1G139 family?
Yes - the 74LVC1G139DCURE4 shares identical pinout and function with all SN74LVC1G139 variants (e.g., DCTR, YZPR). Pin 1 = A, Pin 2 = B, Pins 3/5/6/7 = Y3/Y2/Y1/Y0, Pin 4 = GND, Pin 8 = VCC. Mechanical differences exist only in package outline and solder terminal geometry - not signal assignment.
74LVC1G139DCURE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 8-VFSOP (0.091", 2.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Decoder/Demultiplexer
- Circuit:
- 1 x 2:4
- Independent Circuits:
- 1
- Current - Output High, Low:
- 32mA, 32mA
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 1.65V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 8-VSSOP
74LVC1G139DCURE4 FAQ
1.How can I place an order for 74LVC1G139DCURE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVC1G139DCURE4 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 74LVC1G139DCURE4 reliable?
The price and inventory of 74LVC1G139DCURE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVC1G139DCURE4 is usually 5 days.
3.What payment methods are accepted for 74LVC1G139DCURE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVC1G139DCURE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVC1G139DCURE4?
74LVC1G139DCURE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVC1G139DCURE4 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 74LVC1G139DCURE4?
For technical support, including 74LVC1G139DCURE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVC1G139DCURE4 requirements.
6.How does Aetrix verify that 74LVC1G139DCURE4 is sourced from the original manufacturer or authorized distributors?
All 74LVC1G139DCURE4 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 74LVC1G139DCURE4 meets industry standards.
7.What is the process for return or replacement of 74LVC1G139DCURE4?
All 74LVC1G139DCURE4 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVC1G139DCURE4, 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 74LVC1G139DCURE4 part is unused and in its original packaging.
Return procedure for 74LVC1G139DCURE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74LVC1G139DCURE4 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
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
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…
