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Texas Instruments SN74HC139QPWRQ1
- Part No.:
- SN74HC139QPWRQ1
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74HC139QPWRQ1.pdf
- Description:
- IC DECODER/DEMUX 1X2:4 16TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,953
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Product details
Overview
SN74HC139QPWRQ1 from Texas Instruments is an automotive-qualified dual 2-line-to-4-line decoder/demultiplexer in a 16-pin TSSOP package, operating from 2 V to 6 V with typical propagation delay of 10 ns at 5 V, ±4-mA output drive, and low ICC of 80 µA max - used for memory decoding and data routing in automotive infotainment and body control modules.
For engineers reviewing the SN74HC139QPWRQ1 datasheet, SN74HC139QPWRQ1 pinout, SN74HC139QPWRQ1 application, or SN74HC139QPWRQ1 equivalent, key selection criteria include AEC-Q100 qualification, dual independent enable inputs for cascading, active-low outputs, and compatibility with LSTTL loads in space-constrained automotive PCB layouts.
Technical Context
The SN74HC139QPWRQ1 integrates two fully buffered, independent 2-to-4 line decoders sharing no internal logic - each with dedicated active-low enable (G), address inputs (A, B), and four active-low outputs (Y0–Y3). Inputs present only one normalized load, minimizing driver burden.
It supports high-speed memory systems where decoder delay plus memory enable time remains below memory access time, rendering system-level decoding overhead negligible. The device uses standard HC CMOS logic with Schmitt-trigger input thresholds not specified - only guaranteed VIH/VIL levels per supply voltage are defined.
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 timing-critical address decoding in fast memory subsystems. |
| Output Drive Capability | ±4 mA at VCC = 5 V - sufficient to directly drive ten LSTTL loads without external buffers. |
| Quiescent Current (ICC) | 80 µA maximum - supports low-power operation in always-on automotive modules. |
| Input Leakage Current | ±1 µA max - prevents unintended logic state shifts in high-impedance or floating-bus configurations. |
| AEC-Q100 Qualification | Qualified per H2 (2000-V HBM), M3 (200-V MM), C5 (1000-V CDM) - meets automotive ESD robustness requirements. |
| Operating Temperature | −40°C to +125°C - rated for under-hood and cabin-mounted electronic control units. |
Pinout & Package
TSSOP-16 (PW) package: 4.4 mm × 5.0 mm footprint, 1.2 mm max height, 0.65 mm lead pitch, exposed pad not electrically connected, moisture sensitivity level 2 (260°C reflow, 1-year floor life).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1G, 2G | Active-Low Enable Input | Each controls its respective decoder; low enables decoding, high forces all outputs high - enables cascading and demux data gating. |
| 1A, 1B / 2A, 2B | Address Inputs | Binary-select lines for Y0–Y3 outputs; fully buffered to reduce capacitive loading on upstream drivers. |
| 1Y0–1Y3 / 2Y0–2Y3 | Active-Low Decoder Outputs | Open-drain compatible (with pull-up) but internally driven - sink current when asserted, high-impedance only when disabled. |
| VCC (Pin 16) | Positive Supply | Single rail powers both decoders; must be decoupled locally to suppress switching noise coupling into analog sections. |
| GND (Pin 8) | Ground Reference | Common return for all logic and output currents; requires low-inductance connection to minimize ground bounce. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent decoders | Enables two separate 2-to-4 decode paths on one IC - reduces board area vs. two discrete decoders and eliminates inter-device skew. |
| Active-low enable & outputs | Supports direct interface with active-low chip select (/CS) and output enable (/OE) signals in memory and peripheral interfaces. |
| Wide VCC range (2–6 V) | Permits use across legacy 5 V and modern 3.3 V automotive domains without voltage translation circuitry. |
| Low input current (≤1 µA) | Minimizes loading on microcontroller GPIOs or FPGA I/O banks driving address/enable lines. |
| Automotive temperature range | Validated operation from −40°C to +125°C ambient - suitable for engine control, ADAS sensor hubs, and HVAC modules. |
Applications
| Automotive Memory Decoding | Body Control Module I/O Expansion |
|---|---|
Use Scenario: Address decoding for multiple SRAM or EEPROM devices in a vehicle's instrument cluster MCU subsystem. IC Role / Device Role / Timing Role: Dual decoder routes 2-bit address to select one of four memory chips while minimizing added propagation delay. Use Value: Enables deterministic memory access timing with tpd ≤10 ns - keeps total decode + access time below 45 ns for 20-MHz bus operation. |
Use Scenario: Expanding GPIO count to drive LED indicators, relays, and sensors in door module ECUs. IC Role / Device Role / Timing Role: Acts as demultiplexer: microcontroller serial data + address bits steer signals to 4 output groups via 1G/2G enables. Use Value: Reduces MCU pin count by 6 (vs. direct drive), maintains <100 ns response latency for fault-indicator activation. |
| Infotainment System Peripheral Selection | ADAS Camera Interface Multiplexing |
Use Scenario: Selecting between audio codecs, touch controllers, and display drivers in head-unit designs. IC Role / Device Role / Timing Role: Provides synchronous, glitch-free peripheral chip select using dual enables synchronized to system clock domain. Use Value: Eliminates need for external debounce or metastability hardening due to fully buffered inputs and predictable setup/hold margins. |
Use Scenario: Routing MIPI CSI-2 control signals (I²C, reset, power enable) among multiple camera modules in surround-view systems. IC Role / Device Role / Timing Role: Demultiplexes shared control bus to individual camera power domains using active-low outputs tied to NMOS gate drivers. Use Value: Ensures precise sequencing: Y0–Y3 assert within 12 ns of enable edge - critical for synchronized camera boot timing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual decoder/demultiplexer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74HC139QDRQ1 | Same logic function and specs, but in SOIC-16 (D) package - 3.9 mm × 9.9 mm, 73°C/W θJA vs. 108°C/W for PW. | Better thermal performance and legacy board compatibility; unsuitable for ultra-dense layouts requiring TSSOP footprint. | Select when thermal margin >15°C is required or existing SOIC land patterns are fixed. |
| SN74LV139AQPWRQ1 | Lower VCC range (1.65–5.5 V), faster tpd (7.5 ns typ at 3.3 V), but reduced drive (±6 mA) and no 6 V operation. | Optimized for 3.3 V-only systems; incompatible with 5 V backplanes or mixed-voltage designs requiring 6 V tolerance. | Select for new 3.3 V automotive designs prioritizing speed and lower dynamic power over voltage flexibility. |
Compared with SN74HC139QDRQ1 and SN74LV139AQPWRQ1, the SN74HC139QPWRQ1 uniquely balances 2–6 V operation, AEC-Q100-compliant ESD, and compact TSSOP packaging - making it optimal for cost-sensitive, space-constrained automotive modules needing full voltage interoperability.
Availability
SN74HC139QPWRQ1 is available at Aetrix Electronics and suitable for automotive infotainment systems, body control modules, and ADAS sensor interface designs requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for SN74HC139QPWRQ1 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions for automotive, industrial, and personal electronics markets since 1930.
The SN74HC139QPWRQ1 belongs to TI's automotive-qualified logic portfolio, designed specifically for high-reliability decoding and signal routing in harsh-environment vehicle subsystems - emphasizing AEC-Q100 compliance, wide voltage operation, and robust ESD protection.
FAQ
What is the maximum operating voltage for SN74HC139QPWRQ1?
The SN74HC139QPWRQ1 supports a supply voltage range of 2 V to 6 V, with absolute maximum rating of 7 V. Operation above 6 V violates recommended conditions and risks parametric degradation or latch-up. At 6 V, VOH remains ≥5.48 V and VOL ≤0.33 V under 5.2-mA load - confirming reliable interfacing with 5 V TTL systems.
Does SN74HC139QPWRQ1 support cascading of decoders?
Yes, the SN74HC139QPWRQ1 incorporates two independent active-low enable inputs (1G and 2G) explicitly intended for cascading. One decoder's outputs can drive the enable of another stage, or external logic can combine enables to create larger decode trees - e.g., using 1Y0 to enable a second SN74HC139QPWRQ1 for 3-to-8 expansion.
Is SN74HC139QPWRQ1 pin-compatible with non-automotive versions like SN74HC139?
No - SN74HC139QPWRQ1 shares identical pinout and logic function with SN74HC139, but differs in qualification: SN74HC139QPWRQ1 is AEC-Q100 qualified (−40°C to +125°C, enhanced ESD), while SN74HC139 is commercial-grade (0°C to +70°C). Electrical specs are otherwise identical, enabling drop-in replacement only in automotive-qualified designs.
What is the propagation delay variation across temperature for SN74HC139QPWRQ1?
At VCC = 4.5 V and CL = 50 pF, SN74HC139QPWRQ1 tpd ranges from 35 ns (typ) at 25°C to 51 ns (max) over −40°C to +125°C. This 46% worst-case increase is fully characterized and guaranteed - ensuring timing budgets remain valid across full automotive temperature range without derating.
Can SN74HC139QPWRQ1 outputs drive LEDs directly?
Yes - each active-low output sinks up to 4 mA at 5 V (and 5.2 mA at 6 V), sufficient to illuminate low-current indicator LEDs (e.g., 2 mA @ 1.8 V forward voltage) with a series resistor. For higher-current LEDs, external transistor buffering is recommended to avoid exceeding IOL limits or degrading VOL.
SN74HC139QPWRQ1 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74HC
- Package/Case:
- 16-TSSOP (0.173", 4.40mm 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-TSSOP
SN74HC139QPWRQ1 FAQ
1.How can I place an order for SN74HC139QPWRQ1 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74HC139QPWRQ1 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 SN74HC139QPWRQ1 reliable?
The price and inventory of SN74HC139QPWRQ1 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74HC139QPWRQ1 is usually 5 days.
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SN74HC139QPWRQ1 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74HC139QPWRQ1 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 SN74HC139QPWRQ1?
For technical support, including SN74HC139QPWRQ1 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74HC139QPWRQ1 requirements.
6.How does Aetrix verify that SN74HC139QPWRQ1 is sourced from the original manufacturer or authorized distributors?
All SN74HC139QPWRQ1 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 SN74HC139QPWRQ1 meets industry standards.
7.What is the process for return or replacement of SN74HC139QPWRQ1?
All SN74HC139QPWRQ1 units undergo pre-shipment inspection (PSI). If there is an issue with SN74HC139QPWRQ1, 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 SN74HC139QPWRQ1 part is unused and in its original packaging.
Return procedure for SN74HC139QPWRQ1:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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