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Texas Instruments SN74HC139QDRG4Q1
- Part No.:
- SN74HC139QDRG4Q1
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN74HC139QDRG4Q1.pdf
- Description:
- IC DECODER/DEMUX 1X2:4 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:851
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Product details
Overview
SN74HC139QDRG4Q1 from Texas Instruments is an automotive-qualified dual 2-line-to-4-line decoder/demultiplexer in a 16-pin SOIC package, operating from 2 V to 6 V with typical propagation delay of 10 ns at 5 V, ±4-mA output drive, and qualified per AEC-Q100 for use in memory decoding and data-routing systems in engine control units and ADAS domain controllers.
For engineers reviewing the SN74HC139QDRG4Q1 datasheet, SN74HC139QDRG4Q1 pinout, SN74HC139QDRG4Q1 application, or SN74HC139QDRG4Q1 equivalent, key selection criteria include automotive temperature range (−40°C to 125°C), dual independent enable inputs for cascading, low ICC (80 µA max), and LSTTL-compatible output drive capability.
Technical Context
The SN74HC139QDRG4Q1 integrates two fully buffered, independent 2-to-4 line decoders sharing no internal logic-each with active-low enable (1G/2G) and binary select inputs (1A/1B, 2A/2B). Outputs are active-low open-drain–compatible with standard HC logic levels and drive up to ten LSTTL loads.
It employs CMOS technology with Schmitt-trigger–free inputs, supports demultiplexing via enable-as-data-line operation, and features input transition time limits (400–1000 ns depending on VCC) to ensure reliable switching across the full automotive temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 6 V - enables direct interface with 3.3 V and 5 V logic domains without level shifters. |
| Propagation Delay (tpd) | 10 ns typical at VCC = 5 V, CL = 50 pF - ensures minimal added latency in high-speed memory decode paths. |
| Output Drive Current | ±4 mA at VCC = 5 V - sufficient to directly drive LSTTL inputs or small LED indicators without external buffers. |
| Quiescent Current (ICC) | 80 µA maximum - supports low-power always-on subsystems such as wake-up logic in body control modules. |
| Input Leakage Current | 1 µA maximum - prevents unintended state changes due to floating inputs in harsh automotive environments. |
| AEC-Q100 Qualification | Qualified per H2 (2000-V HBM), M3 (200-V MM), C5 (1000-V CDM) - meets automotive ESD robustness requirements for under-hood applications. |
| Operating Temperature | −40°C to +125°C - rated for placement in powertrain, chassis, and ADAS ECUs without derating. |
Pinout & Package
SN74HC139QDRG4Q1 is housed in a 16-pin SOIC (D) package with 1.27-mm pitch, 10.3-mm body width, and 1.75-mm maximum height. Pin 1 is located in quadrant Q1 per tape-and-reel orientation standards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1G, 2G | Active-Low Enable Input | Each controls one decoder independently; tied low to activate, high to force all outputs high (disabled state). |
| 1A, 1B / 2A, 2B | Binary Address Inputs | Two-bit select lines per decoder; determine which of four active-low outputs (Y0–Y3) goes low when enabled. |
| 1Y0–1Y3 / 2Y0–2Y3 | Active-Low Decoder Outputs | Each set provides mutually exclusive low assertion; outputs remain high-impedance only when corresponding G is high. |
| VCC (Pin 16) | Positive Supply | Single rail powers both decoders; no separate logic or I/O supply required. |
| GND (Pin 8) | Ground Reference | Common return for all inputs, outputs, and internal circuitry; must be low-impedance for noise immunity. |
Key Features
| Feature | Design Value |
|---|---|
| Dual Independent Decoders | Enables two parallel decode functions (e.g., separate memory banks or peripheral address spaces) in one IC with no shared timing or enable constraints. |
| Enable-as-Data-Line Operation | Allows 1G or 2G to serve as demultiplexer data input while A/B act as channel selectors-reducing component count in serial-to-parallel conversion. |
| Wide Voltage Compatibility | Operates across 2 V–6 V, supporting mixed-voltage designs including legacy 5 V microcontrollers and modern 3.3 V FPGAs. |
| Automotive ESD Robustness | HBM 2000 V, MM 200 V, CDM 1000 V ratings eliminate need for external TVS protection in most board-level implementations. |
| Low Dynamic Power | 25 pF typical power dissipation capacitance per decoder minimizes switching current in high-frequency address strobing applications. |
Applications
| Engine Control Unit (ECU) Memory Mapping | ADAS Camera Interface Multiplexing |
|---|---|
Use Scenario: Selecting between multiple flash memory banks during boot or firmware update in gasoline/diesel ECUs. IC Role / Device Role / Timing Role: Dual decoder routes address bits to bank-select logic while maintaining <10 ns decode latency to avoid pipeline stalls. Use Value: Eliminates need for discrete logic gates or larger CPLDs, reducing BOM cost and PCB area in space-constrained engine compartments. | Use Scenario: Routing serialized sensor data from multiple camera modules to a central vision processor in surround-view systems. IC Role / Device Role / Timing Role: Acts as a synchronous demultiplexer using enable-as-data mode to distribute frame sync pulses across four camera lanes. Use Value: Provides deterministic, glitch-free channel selection with no additional clock domain crossing logic or FPGA resources. |
| Body Control Module (BCM) I/O Expansion | Automotive Infotainment Display Backlight Control |
Use Scenario: Expanding microcontroller GPIO to drive 8 discrete load switches for door lock actuators, mirror controls, and lighting zones. IC Role / Device Role / Timing Role: Each decoder drives four N-channel MOSFET gate drivers; active-low outputs directly interface with logic-level FETs. Use Value: Enables single-chip expansion of 4 address lines into 8 controlled outputs with built-in current limiting and thermal safety margins. | Use Scenario: Sequencing backlight brightness levels across four LED strings in digital instrument clusters using PWM-modulated enable signals. IC Role / Device Role / Timing Role: Uses cascaded enables (1G→2G) to create 4-step intensity states; outputs sink current for common-anode LED configurations. Use Value: Delivers precise, jitter-free dimming steps without software overhead or dedicated LED driver ICs-reducing system cost by >15%. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual decoder/demultiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HCT139QDRQ1 | TTL-input thresholds (VIH = 2 V min at VCC = 4.5 V); identical pinout, package, and timing. | Better compatibility with legacy 5 V TTL outputs; slightly higher ICC (160 µA max). | Select when interfacing with older microcontrollers or ASICs with TTL-level outputs. |
| MC74HC139ADTR2G | SOIC-16 package, AEC-Q100 qualified, but specified only to +105°C ambient (not +125°C). | Limited to cabin electronics (e.g., HVAC, radio) where junction temperature stays below 125°C. | Choose for cost-sensitive non-powertrain applications where full under-hood rating is unnecessary. |
Compared with SN74HCT139QDRQ1 and MC74HC139ADTR2G, the SN74HC139QDRG4Q1 offers the broadest automotive temperature coverage (−40°C to 125°C), lowest quiescent current, and highest ESD robustness-making it the preferred choice for safety-critical powertrain and ADAS subsystems requiring long-term reliability.
Availability
SN74HC139QDRG4Q1 is available at Aetrix Electronics and suitable for engine control units, ADAS domain controllers, and body control modules requiring stable component supply across extended automotive temperature ranges and multi-year production cycles.
Supply support for SN74HC139QDRG4Q1 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 automotive-grade logic solutions with over 50 years of automotive qualification experience.
The SN74HC139QDRG4Q1 belongs to TI's automotive HC logic family, engineered specifically for high-speed, low-power memory decoding and data routing in safety-critical vehicle subsystems where AEC-Q100 compliance and thermal resilience are mandatory.
FAQ
What is the maximum operating temperature for SN74HC139QDRG4Q1?
The SN74HC139QDRG4Q1 is rated for continuous operation from −40°C to +125°C ambient temperature, meeting AEC-Q100 Grade 1 requirements. This specification applies to the full SOIC (D) package variant and is validated across voltage range (2 V–6 V) and load conditions per the official TI datasheet SCLS598B.
Does SN74HC139QDRG4Q1 support demultiplexing functionality?
Yes, SN74HC139QDRG4Q1 supports demultiplexing by using its active-low enable inputs (1G or 2G) as data lines. When one enable is held low and the other toggled, the selected decoder's outputs respond to A/B inputs-enabling 1-to-4 serial-to-parallel data distribution without external logic.
Is SN74HC139QDRG4Q1 pin-compatible with standard SN74HC139 variants?
Yes, SN74HC139QDRG4Q1 shares identical pinout, electrical characteristics, and functional behavior with non-automotive SN74HC139 variants in SOIC (D) packages-including SN74HC139DR and SN74HC139N-allowing drop-in replacement in existing designs after verifying AEC-Q100 compliance requirements.
What is the output drive capability of SN74HC139QDRG4Q1 at 3.3 V supply?
At VCC = 3.3 V, SN74HC139QDRG4Q1 delivers ±4 mA output drive (per TI characterization data), sufficient to interface directly with 3.3 V LVTTL or LVCMOS inputs. VOL remains ≤0.33 V and VOH ≥2.97 V under 4-mA load, ensuring robust noise margins in automotive signal chains.
How does SN74HC139QDRG4Q1 handle unused inputs?
All unused inputs on SN74HC139QDRG4Q1 must be tied to VCC or GND to prevent floating states that could cause excessive ICC or erratic output behavior. TI recommends connecting unused A/B or G inputs directly to supply rails-not left open-as outlined in application report SCBA004.
SN74HC139QDRG4Q1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HC
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Type:
- Decoder/Demultiplexer
- Circuit:
- 1 x 2:4
- Independent Circuits:
- 2
- Current - Output High, Low:
- 5.2mA, 5.2mA
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 2V ~ 6V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
SN74HC139QDRG4Q1 FAQ
1.How can I place an order for SN74HC139QDRG4Q1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74HC139QDRG4Q1 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 SN74HC139QDRG4Q1 reliable?
The price and inventory of SN74HC139QDRG4Q1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74HC139QDRG4Q1 is usually 5 days.
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SN74HC139QDRG4Q1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74HC139QDRG4Q1 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 SN74HC139QDRG4Q1?
For technical support, including SN74HC139QDRG4Q1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74HC139QDRG4Q1 requirements.
6.How does Aetrix verify that SN74HC139QDRG4Q1 is sourced from the original manufacturer or authorized distributors?
All SN74HC139QDRG4Q1 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 SN74HC139QDRG4Q1 meets industry standards.
7.What is the process for return or replacement of SN74HC139QDRG4Q1?
All SN74HC139QDRG4Q1 units undergo pre-shipment inspection (PSI). If there is an issue with SN74HC139QDRG4Q1, 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 SN74HC139QDRG4Q1 part is unused and in its original packaging.
Return procedure for SN74HC139QDRG4Q1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
SN74HC139QDRG4Q1 Tags
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