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Texas Instruments SN74HC139QDRQ1
- Part No.:
- SN74HC139QDRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
SN74HC139QDRQ1.pdf
- Description:
- IC DECODER/DEMUX 1X2:4 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,646
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Product details
Overview
SN74HC139QDRQ1 from Texas Instruments is an automotive-qualified dual 2-line-to-4-line decoder/demultiplexer in SOIC-16 package, operating from 2 V to 6 V, with typical propagation delay of 10 ns at 4.5 V, ±4-mA output drive, and low ICC of 80 µA max - used for high-speed memory decoding and data routing in automotive control modules.
For engineers reviewing the SN74HC139QDRQ1 datasheet, SN74HC139QDRQ1 pinout, SN74HC139QDRQ1 application, or SN74HC139QDRQ1 equivalent, key selection criteria include AEC-Q100 qualification, dual independent enable inputs for cascading, active-low outputs, and compatibility with LSTTL loads in safety-critical vehicle subsystems.
Technical Context
This device integrates two fully buffered, independent 2:4 decoders sharing no internal logic - each with dedicated active-low enable (1G/2G), address inputs (1A/1B and 2A/2B), and four active-low outputs (1Y0–1Y3 and 2Y0–2Y3). Input thresholds scale with VCC per JEDEC JESD8-5, supporting mixed-voltage interfacing.
Propagation delay is specified under CL = 50 pF load and varies with supply voltage (e.g., tpd = 30 ns max at VCC = 6 V, TA = −40°C to 125°C); output transition times (tt) are ≤19 ns under same conditions. ESD protection meets AEC-Q100 H2 (2000-V HBM), M3 (200-V MM), and C5 (1000-V CDM) requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 2 V to 6 V - supports direct interface with 3.3-V and 5-V logic families without level shifters. |
| Propagation Delay (tpd) | 10 ns typical at VCC = 4.5 V, CL = 50 pF - enables use in sub-100-MHz address decode paths. |
| Output Drive | ±4 mA at VCC = 5 V - sufficient to directly drive ten LSTTL inputs without buffering. |
| Quiescent Current (ICC) | 80 µA max at VCC = 6 V - reduces standby power in always-on automotive modules. |
| Input Leakage (II) | 1 µA max - ensures stable logic states with high-impedance or floating-bus configurations. |
| Operating Temperature | −40°C to +125°C - qualified for engine bay, transmission, and ADAS ECU environments. |
| ESD Rating | AEC-Q100 Class H2 (2000-V HBM) - meets automotive board-level robustness requirements. |
Pinout & Package
SOIC-16 (D package), 10.3 mm × 6.5 mm × 1.75 mm body, gull-wing leads, RoHS-compliant NiPdAu finish, MSL Level-1 (260°C, unlimited reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1G, 2G | Active-low enable input | Each controls one decoder independently; low enables decoding, high forces all outputs high. |
| 1A, 1B / 2A, 2B | Address inputs | Binary-select lines determining which of four outputs goes low; fully buffered, normalized load = 1. |
| 1Y0–1Y3 / 2Y0–2Y3 | Active-low decoded outputs | Each decoder asserts exactly one output low per valid address; open-drain compatible with wired-OR bus structures. |
| VCC (Pin 16) | Positive supply | Accepts 2–6 V; decoupling capacitor required within 10 mm for stable switching performance. |
| GND (Pin 8) | Ground reference | Common return for all inputs/outputs; must be low-inductance connection to minimize ground bounce. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent decoders | Enables simultaneous decoding of two separate 2-bit address buses - eliminates need for two discrete ICs in multi-channel systems. |
| Active-low enable & outputs | Simplifies integration with microcontroller GPIOs configured as active-low chip selects and allows direct wired-OR expansion with other HC-series devices. |
| Wide VCC range (2–6 V) | Permits single BOM across 3.3-V MCU domains and legacy 5-V sensor interfaces without external regulators or translators. |
| Low input current (≤1 µA) | Reduces loading on upstream drivers - critical when driving multiple decoders from a single address latch or FPGA I/O bank. |
| AEC-Q100 qualified | Validated for automotive use including temperature cycling, HTOL, and ESD - supports ASIL-B system integration without additional qualification effort. |
Applications
| Engine Control Unit (ECU) Memory Mapping | Body Control Module (BCM) Peripheral Select |
|---|---|
Use Scenario: Decoding 2-bit address lines from an 8-bit microcontroller to select among four SRAM banks or EEPROM pages in an engine management system. IC Role / Device Role / Timing Role: Address decoder providing deterministic, low-latency chip select signals synchronized to MCU clock edges. Use Value: Propagation delay ≤30 ns ensures no wait states added to memory access cycles, maintaining real-time deterministic response. | Use Scenario: Routing CAN/LIN controller outputs to four distinct lighting or door-lock driver ICs based on command opcode. IC Role / Device Role / Timing Role: Demultiplexer converting serial command bits into parallel peripheral enable signals. Use Value: Dual-enable architecture allows independent gating of each decoder path, enabling selective activation without software overhead. |
| Advanced Driver Assistance Systems (ADAS) Sensor Hub | Automotive Infotainment Display Interface |
Use Scenario: Selecting between four radar transceiver channels or camera sensor streams in a centralized ADAS domain controller. IC Role / Device Role / Timing Role: High-speed data-path selector enabling time-division multiplexing of sensor data to shared processing resources. Use Value: 10 ns typical tpd minimizes inter-channel skew, preserving timing integrity for synchronized multi-sensor fusion algorithms. | Use Scenario: Enabling one of four display driver ICs (e.g., for instrument cluster, HUD, center stack, rear-seat monitor) from a central graphics processor. IC Role / Device Role / Timing Role: Output-enable distributor managing power sequencing and signal routing to segmented display subsystems. Use Value: AEC-Q100 qualification and −40°C to +125°C operation ensure reliable startup and runtime behavior across cabin thermal zones. |
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 |
|---|---|---|---|
| SN74HCS139QDRQ1 | Same pinout and function but Schmitt-trigger inputs; higher hysteresis (≈0.8 V at VCC = 4.5 V) improves noise immunity on noisy automotive buses. | Better suited for unfiltered address lines near motors or ignition systems where slow-rising or noisy inputs occur. | Select SN74HCS139QDRQ1 if input signal rise/fall times exceed 400 ns or EMI environment exceeds ISO 11452-4 Class 3. |
| MC74HC139ADTR2G | Pin-compatible SOIC-16 variant from ON Semiconductor; identical logic function but different AEC-Q100 test report scope (no CDM rating published). | Validated for automotive use but lacks published CDM ESD data - requires additional board-level validation for high-charge environments. | Choose MC74HC139ADTR2G only when TI supply constraints exist and CDM robustness is not mission-critical. |
Compared with SN74HCS139QDRQ1 and MC74HC139ADTR2G, the SN74HC139QDRQ1 offers optimal balance of speed, power, and full AEC-Q100 ESD coverage - making it the preferred choice for new automotive designs requiring guaranteed HBM/MM/CDM compliance without Schmitt-trigger overhead.
Availability
SN74HC139QDRQ1 is available at Aetrix Electronics and suitable for automotive engine control units, body control modules, ADAS sensor hubs, and infotainment display interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74HC139QDRQ1 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 silicon with over 50 years of automotive qualification experience.
The SN74HC139-Q1 belongs to TI's automotive HC logic family - designed specifically for high-reliability, high-speed decoding and demultiplexing in engine, chassis, and safety-critical electronic control units.
FAQ
What is the maximum operating frequency supported by SN74HC139QDRQ1 in a memory decoding application?
The SN74HC139QDRQ1 does not specify a maximum clock frequency, but its typical propagation delay of 10 ns at 4.5 V implies usable operation up to ≈50 MHz in address decode paths with adequate setup/hold margins. Real-world limits depend on PCB layout, load capacitance, and driving source strength - measured tpd remains ≤30 ns across −40°C to +125°C, supporting reliable sub-33-MHz synchronous bus operation.
Does SN74HC139QDRQ1 support mixed-voltage operation between 3.3-V and 5-V domains?
Yes, SN74HC139QDRQ1 supports mixed-voltage operation: its input thresholds scale with VCC (VIH = 0.7×VCC min, VIL = 0.3×VCC max), allowing direct connection to 3.3-V microcontrollers while powered from a 5-V rail - or vice versa - without level-shifting circuitry, provided all inputs remain within 0 V to VCC.
Can SN74HC139QDRQ1 drive LEDs directly without current-limiting resistors?
No, SN74HC139QDRQ1 should not drive LEDs directly. Its outputs are rated for ±4 mA at 5 V but lack internal current regulation; connecting an LED without a series resistor risks exceeding absolute maximum output current (±25 mA) and damaging the output stage. Always use external current-limiting resistors sized for target LED forward voltage and desired brightness.
How does the dual-enable architecture of SN74HC139QDRQ1 simplify cascaded decoding?
The SN74HC139QDRQ1 incorporates two independent active-low enables (1G and 2G), allowing one decoder to be disabled while the other remains active - enabling hierarchical addressing (e.g., using one decoder's outputs to enable the second) or time-multiplexed peripheral selection without external logic gates, reducing component count and propagation delay in multi-layer decode trees.
Is SN74HC139QDRQ1 pin-compatible with the commercial-grade SN74HC139?
Yes, SN74HC139QDRQ1 is pin-compatible and functionally identical to the commercial SN74HC139, sharing the same SOIC-16 footprint, pinout, and logic behavior - differing only in AEC-Q100 qualification, extended temperature range (−40°C to +125°C), and enhanced ESD robustness; no PCB changes are required when upgrading from commercial to automotive grade.
SN74HC139QDRQ1 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
SN74HC139QDRQ1 FAQ
1.How can I place an order for SN74HC139QDRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74HC139QDRQ1 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 SN74HC139QDRQ1 reliable?
The price and inventory of SN74HC139QDRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74HC139QDRQ1 is usually 5 days.
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We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74HC139QDRQ1 transactions.
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4.How is shipping managed for SN74HC139QDRQ1?
SN74HC139QDRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74HC139QDRQ1 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 SN74HC139QDRQ1?
For technical support, including SN74HC139QDRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74HC139QDRQ1 requirements.
6.How does Aetrix verify that SN74HC139QDRQ1 is sourced from the original manufacturer or authorized distributors?
All SN74HC139QDRQ1 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 SN74HC139QDRQ1 meets industry standards.
7.What is the process for return or replacement of SN74HC139QDRQ1?
All SN74HC139QDRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with SN74HC139QDRQ1, 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 SN74HC139QDRQ1 part is unused and in its original packaging.
Return procedure for SN74HC139QDRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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