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Nexperia USA Inc. 74HCT139D-Q100J
- Part No.:
- 74HCT139D-Q100J
- Manufacturer:
- Nexperia USA Inc.
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
74HCT139D-Q100J.pdf
- Description:
- IC DECODER/DEMUX 1 X 2:4 16SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,413
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Product details
Overview
74HCT139D-Q100 from Nexperia is an automotive-qualified dual 2-to-4 line decoder/demultiplexer in SO16 package, operating from -40 °C to +125 °C with TTL-compatible inputs, active-LOW outputs, and propagation delay of 16–51 ns at VCC = 4.5 V. It implements two independent decoders for memory address decoding and data routing in engine control units and body electronics.
For engineers reviewing the 74HCT139D-Q100 datasheet, 74HCT139D-Q100 pinout, 74HCT139D-Q100 application, or 74HCT139D-Q100 equivalent, key selection criteria include automotive AEC-Q100 Grade 1 qualification, dual-decoder independence, enable-as-data demultiplexing capability, and guaranteed timing performance across extended temperature range.
Technical Context
This device integrates two fully independent 2-to-4 decoders, each with dedicated address inputs (A0/A1), active-LOW enable (nE), and four active-LOW outputs (nY0–nY3). Outputs are mutually exclusive: only one output per decoder is LOW for any valid input combination.
It supports dual functional modes: as a decoder (address-to-output mapping) or as a 1-to-4 demultiplexer (enable pin used as data input). Input clamp diodes allow safe interfacing to voltages exceeding VCC when used with current-limiting resistors.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5 V automotive logic rails and noise margin stability |
| Operating Temperature | -40 °C to +125 °C - qualified for under-hood and powertrain applications per AEC-Q100 Grade 1 |
| Propagation Delay | 16 ns (typ) to 51 ns (max) at VCC = 4.5 V - defines maximum clock-to-output timing for synchronous decoding |
| Input Logic Level | TTL-compatible - VIH = 2.0 V min, VIL = 0.8 V max - enables direct interface with legacy 5 V microcontrollers and sensors |
| Output Drive | ±4 mA at VCC = 4.5 V - sufficient to drive multiple CMOS/TTL inputs or small LED loads without buffering |
| ESD Protection | HBM > 2000 V, CDM > 1000 V - meets automotive robustness requirements for handling and board assembly |
Pinout & Package
74HCT139D-Q100 uses the SOT109-1 plastic small outline package (SO16), 16-pin, 3.9 mm body width, with standard 1.27 mm lead pitch and gull-wing leads for surface-mount assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 15 | 1E, 2E | Active-LOW enable for Decoder 1 and Decoder 2 - HIGH disables all outputs (forces HIGH); LOW enables decoding |
| 2, 3, 13, 14 | 1A0, 1A1, 2A0, 2A1 | Binary address inputs - select one of four outputs per decoder (00→nY0, 01→nY1, etc.) |
| 4–7, 9–12 | 1Y0–1Y3, 2Y0–2Y3 | Active-LOW decoded outputs - only one output per decoder is LOW per input combination |
| 8 | GND | Ground reference - return path for all internal logic and output currents |
| 16 | VCC | Positive supply - powers both decoders; must be decoupled locally per automotive layout guidelines |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent decoders | Enables simultaneous address decoding for two memory banks or peripheral groups without cross-talk |
| Enable-as-data demultiplexing | Each nE pin accepts serial data while address pins steer it to one of four outputs - eliminates need for external multiplexer logic |
| AEC-Q100 Grade 1 qualification | Validated for automotive use up to +125 °C ambient - supports ECU, ADAS, and gateway module deployment |
| Clamp diode protected inputs | Allows safe connection to 12 V or higher signals using series resistors - simplifies level-shifting in mixed-voltage systems |
| Active-LOW outputs | Directly drives common-cathode LED arrays or enables N-channel load switches without inverters |
Applications
| Engine Control Unit (ECU) | Body Control Module (BCM) |
|---|---|
Use Scenario: Selecting among four fuel injector drivers based on cylinder firing sequence. IC Role / Device Role / Timing Role: Dual decoder routes cylinder-select signals to individual injector enable lines with deterministic propagation delay. Use Value: Ensures precise, jitter-free activation timing across all cylinders - critical for combustion efficiency and emissions compliance. | Use Scenario: Routing LIN bus diagnostic commands to four door module sub-nodes. IC Role / Device Role / Timing Role: Acts as a demultiplexer: LIN data stream enters via nE, address selects target node output. Use Value: Reduces MCU GPIO count by 3 pins per node while maintaining deterministic command delivery latency. |
| Instrument Cluster Display | Automotive Gateway |
Use Scenario: Decoding display memory addresses to select one of four 16-segment LED driver ICs. IC Role / Device Role / Timing Role: Address decoder maps 2-bit segment group ID to corresponding driver chip's chip-select line. Use Value: Enables shared data bus architecture - cuts PCB trace count and simplifies firmware memory mapping. | Use Scenario: Enabling CAN transceiver standby modes for four isolated CAN FD domains. IC Role / Device Role / Timing Role: Each nYx output controls EN pin of a CAN transceiver; decoder selects active domain during sleep/wake transitions. Use Value: Achieves <10 μA quiescent current per disabled transceiver - extends battery life in always-on gateway designs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual 2-to-4 decoder/demultiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74HC139D-Q100 | CMOS-level inputs (VIH = 3.15 V min at VCC = 4.5 V); higher noise immunity but incompatible with TTL sources | Requires 3.3 V or CMOS-compatible controllers; unsuitable for legacy 5 V TTL microcontrollers | Select when system uses pure CMOS logic and needs lower ICC (8 μA vs 160 μA at 125 °C) |
| SN74LS139DR | Bipolar TTL process; VIH = 2.0 V, VIL = 0.8 V same, but slower (tPD = 25 ns typ), non-automotive qualified | Limited to commercial/industrial environments; lacks AEC-Q100 validation and extended temperature support | Acceptable for non-safety-critical prototyping or cost-sensitive non-automotive designs where qualification is not required |
Compared with 74HC139D-Q100, the HCT version ensures reliable interface with legacy TTL outputs, while SN74LS139DR offers pin-equivalent function without automotive qualification - making 74HCT139D-Q100 the only choice for production-grade automotive decoding requiring guaranteed operation at +125 °C.
Availability
74HCT139D-Q100 is available at Aetrix Electronics and suitable for engine control units, body control modules, instrument clusters, and automotive gateways requiring stable component supply with full AEC-Q100 traceability.
Supply support for 74HCT139D-Q100 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, reliable discrete, logic, and MOSFET devices optimized for automotive, industrial, and consumer applications.
The 74HCT139-Q100 series belongs to Nexperia's automotive-qualified logic portfolio, designed specifically to meet stringent AEC-Q100 Grade 1 requirements for under-hood and safety-critical electronic control units.
FAQ
Can 74HCT139D-Q100 operate at 3.3 V supply?
No. The 74HCT139D-Q100 is specified only for 4.5 V to 5.5 V operation per its recommended conditions. At 3.3 V, input thresholds (VIH = 2.0 V min) become marginal, and output drive (VOH/VOL) falls outside specification - risking logic misreads and increased static current. Use 74LVC139AD for 3.3 V automotive applications.
What is the maximum fan-out for 74HCT139D-Q100 outputs?
Each active-LOW output can drive up to 10 standard 74HCT inputs (based on IO = ±4 mA and typical HCT input current of 1 μA). For heavier loads like LEDs or MOSFET gates, external buffers or current-limiting resistors are required - the device is not rated for continuous >4 mA sink per output.
Is the 74HCT139D-Q100 pin-compatible with non-automotive 74HCT139D?
Yes - mechanical pinout, electrical characteristics, and logic function are identical between 74HCT139D-Q100 and standard 74HCT139D. The "-Q100" suffix denotes AEC-Q100 qualification, including additional stress testing and lot-level traceability, but does not alter footprint or signal behavior.
How does the enable-as-demultiplexer mode work in practice?
When used as a 1-to-4 demultiplexer, the data signal is applied to nE (pin 1 or 15), while address bits A0/A1 (pins 2/3 or 13/14) select which output (nY0–nY3) mirrors the data state - LOW on nE passes through as LOW on the selected nYx, while other outputs remain HIGH. This requires no external logic and preserves timing integrity.
74HCT139D-Q100J Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74HCT
- 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:
- 4mA, 4mA
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C
- Grade:
- Automotive
- Qualification:
- AEC-Q100
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SO
74HCT139D-Q100J FAQ
1.How can I place an order for 74HCT139D-Q100J through Aetrix?
Please submit a Request for Quotation (RFQ) for 74HCT139D-Q100J 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 74HCT139D-Q100J reliable?
The price and inventory of 74HCT139D-Q100J are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74HCT139D-Q100J is usually 5 days.
3.What payment methods are accepted for 74HCT139D-Q100J?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74HCT139D-Q100J transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74HCT139D-Q100J?
74HCT139D-Q100J orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74HCT139D-Q100J 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 74HCT139D-Q100J?
For technical support, including 74HCT139D-Q100J datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74HCT139D-Q100J requirements.
6.How does Aetrix verify that 74HCT139D-Q100J is sourced from the original manufacturer or authorized distributors?
All 74HCT139D-Q100J 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 74HCT139D-Q100J meets industry standards.
7.What is the process for return or replacement of 74HCT139D-Q100J?
All 74HCT139D-Q100J units undergo pre-shipment inspection (PSI). If there is an issue with 74HCT139D-Q100J, 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 74HCT139D-Q100J part is unused and in its original packaging.
Return procedure for 74HCT139D-Q100J:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74HCT139D-Q100J Tags
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SN74HC138DR
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TC7SB3157CFU,LF(CT
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74CBTLV3257PW,118
Nexperia USA Inc.
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74HC154BQ,118
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P3S0200GMX
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TCA9543APWR
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TCA9546APWR
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SN74HC138N
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