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Texas Instruments 74ACT11139DR
- Part No.:
- 74ACT11139DR
- Manufacturer:
- Texas Instruments
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- 16-SOIC (0.154", 3.90mm Width)
- Datasheet:
-
74ACT11139DR.pdf
- Description:
- IC DECODER/DEMUX 1X2:4 16SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,881
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Product details
Overview
74ACT11139DR from Texas Instruments is a dual 2-line-to-4-line decoder/demultiplexer IC designed for high-speed memory decoding and data routing. It features two independent decoders, TTL-compatible inputs, fully buffered inputs (1 normalized load each), active-low enables (1G/2G) usable as data lines, and operates from −40°C to 85°C at 4.5–5.5 V supply.
For engineers reviewing the 74ACT11139DR datasheet, 74ACT11139DR pinout, 74ACT11139DR application, or 74ACT11139DR equivalent, key selection criteria include propagation delay (1.7–8.5 ns), output drive (±24 mA), latch-up immunity (500 mA at 125°C), EPIC™ 1-µm CMOS process, and SOIC-16 package compatibility with memory subsystems and synchronous data paths.
Technical Context
The 74ACT11139DR implements two fully independent 2-to-4 line decoders in a single SOIC-16 package, each with separate active-low enable (1G/2G) and address inputs (1A/1B, 2A/2B). Its logic follows positive-enable decoding with active-low outputs (Y0–Y3 per section), supporting demultiplexing when enables serve as data inputs.
Designed using TI's EPIC™ (Enhanced-Performance Implanted CMOS) 1-µm process, it delivers TTL-voltage compatibility (VIH = 2 V, VIL = 0.8 V) while maintaining CMOS power efficiency. Center-pin VCC/GND placement minimizes high-speed switching noise, and all inputs are fully buffered to isolate driving circuits.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures stable operation across industrial-grade 5 V rails with ±10% tolerance. |
| Propagation Delay | 1.7–8.5 ns - enables sub-10 ns address decoding critical for high-speed memory systems. |
| Output Drive | ±24 mA - supports direct fanout to multiple TTL or ACT loads without external buffers. |
| Input Load | 1 normalized load per input - reduces loading on upstream drivers, preserving signal integrity. |
| Latch-Up Immunity | 500 mA at 125°C - meets stringent reliability requirements for embedded systems operating under thermal stress. |
| Operating Temperature | −40°C to +85°C - qualified for industrial environments without derating. |
| Power Dissipation Cap | 1.3 W (SOIC-D) - defines maximum safe continuous power under still-air conditions at 55°C ambient. |
Pinout & Package
74ACT11139DR is housed in a 16-pin plastic small-outline (SOIC-D) package with center-aligned VCC (Pin 16) and GND (Pin 8), optimizing high-frequency noise suppression. Pin numbering follows standard D-package top-view orientation.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1G, 2G | Active-Low Enable | Gate control for respective decoder sections; double-function as data inputs in demux mode. |
| 1A, 1B / 2A, 2B | Address Inputs | Binary select lines (00–11) determining active output Y0–Y3 per section. |
| 1Y0–1Y3 / 2Y0–2Y3 | Active-Low Outputs | Four decoded outputs per section; asserted low when corresponding address + enable condition met. |
| VCC (Pin 16) | Power Supply | Center-placed 4.5–5.5 V supply connection minimizing current loop area and EMI. |
| GND (Pin 8) | Ground Reference | Center-placed return path paired with VCC to reduce ground bounce in high-speed switching. |
Key Features
| Feature | Design Value |
|---|---|
| TTL-Voltage Compatible Inputs | Accepts standard TTL logic levels (VIH ≥ 2 V, VIL ≤ 0.8 V) while operating on 5 V CMOS supply - eliminates level-shifting in mixed-logic systems. |
| Fully Buffered Inputs | Each input presents only one normalized load, enabling direct connection to ACT-series outputs without fanout degradation. |
| Center-Pin Power/Ground | VCC (Pin 16) and GND (Pin 8) positioned centrally to minimize simultaneous switching noise and improve high-speed signal integrity. |
| EPIC™ Process Technology | 1-µm implanted CMOS delivers high speed, low power, and robust latch-up immunity (500 mA @ 125°C) for mission-critical decoding. |
| Synchronous Cascading Support | Dual independent enables (1G/2G) allow clean, glitch-free cascading of multiple 74ACT11139DR units in wide-address memory systems. |
Applications
| High-Speed Memory Decoding | Data Demultiplexing |
|---|---|
Use Scenario: Address decoding in 32-bit microprocessor systems with >10 MHz bus clocks and multi-bank DRAM/SRAM. IC Role / Device Role / Timing Role: Dual decoder resolves chip-select signals for up to eight memory banks with sub-10 ns latency. Use Value: Reduces total system decode delay by consolidating two 2:4 functions into one package, cutting PCB trace length and interconnect capacitance. | Use Scenario: Routing serial data streams to parallel peripheral interfaces (e.g., UART-to-IO expander buses). IC Role / Device Role / Timing Role: Demultiplexer using 1G/2G as data inputs and A/B as channel selectors to steer one input to four outputs. Use Value: Enables single-cycle data distribution without external latches, leveraging active-low outputs for direct enable control of downstream devices. |
| Industrial Control Backplanes | Synchronous Logic Subsystems |
Use Scenario: I/O expansion in programmable logic controllers (PLCs) requiring deterministic response under EMI-prone factory conditions. IC Role / Device Role / Timing Role: Selective activation of sensor interface modules or actuator drivers via decoded address bus. Use Value: Latch-up immunity (500 mA @ 125°C) and −40°C to +85°C rating ensure reliable operation in uncontrolled industrial enclosures. | Use Scenario: Clock-domain isolation and gated clock distribution in FPGA companion logic or ASIC glue logic. IC Role / Device Role / Timing Role: Synchronous enable-controlled gating of clock or strobe signals to four functional blocks. Use Value: Center-pin VCC/GND and low propagation skew (<0.5 ns between tPLH/tPHL) preserve timing margins in tightly synchronized subsystems. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual 2-to-4 line decoder applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74ACT139N | Same logic function and AC specs, but in 16-pin PDIP (N) package - no SOIC footprint. | Preferred for through-hole prototyping or legacy board rework where SOIC reflow is unavailable. | Select 74ACT139N only when DIP mounting is required; identical timing and drive capability otherwise. |
| SN74LV139A | Lower voltage operation (2–5.5 V), reduced drive (±12 mA), higher propagation delay (typ. 8.5 ns), and LV-CMOS input thresholds. | Suitable for mixed-voltage systems (e.g., 3.3 V logic domains) but not drop-in for 5 V TTL-interfaced designs. | Choose SN74LV139A only when supply voltage flexibility or lower power is prioritized over speed and TTL compatibility. |
Compared with 74ACT11139DR, 74ACT139N offers identical electrical behavior in a through-hole package, while SN74LV139A trades speed and drive strength for broader voltage range and lower static power - making the former a mechanical alternative and the latter a functional compromise for modern low-voltage systems.
Availability
74ACT11139DR is available at Aetrix Electronics and suitable for high-speed memory decoding, industrial control backplanes, and synchronous logic subsystems requiring stable component supply across extended temperature ranges and legacy design support.
Supply support for 74ACT11139DR 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 logic technologies, with decades of innovation in high-reliability industrial and computing solutions.
The 74ACT11139DR belongs to TI's Advanced CMOS (ACT) logic family, engineered specifically for high-speed memory-decoding and data-routing applications demanding minimal propagation delay and robust noise immunity.
FAQ
What is the operating voltage range for the 74ACT11139DR?
The 74ACT11139DR operates from 4.5 V to 5.5 V DC. This 5 V nominal range ensures compatibility with standard TTL and ACT logic families while maintaining noise margin and output drive capability. Operation outside this range may cause functional failure or damage, as specified in the absolute maximum ratings (−0.5 V to 7 V).
Does the 74ACT11139DR support TTL-level input signals?
Yes, the 74ACT11139DR features TTL-voltage compatible inputs, with VIH ≥ 2 V and VIL ≤ 0.8 V under recommended conditions. This allows direct interfacing with legacy TTL outputs without level shifters, a key design advantage confirmed in the device's functional description and recommended operating conditions table.
What package type is used for the 74ACT11139DR?
The 74ACT11139DR uses a 16-pin plastic small-outline integrated circuit (SOIC-D) package. This surface-mount package has standard dimensions (width: 3.9 mm, length: 9.9 mm) and is RoHS-compliant with green (Pb-free, no Sb/Br) finish, as documented in TI's Packaging Information addendum.
Can the 74ACT11139DR be used as a demultiplexer?
Yes, the 74ACT11139DR can function as a dual 1-to-4 demultiplexer. Its active-low enable inputs (1G and 2G) serve as data inputs, while address lines (1A/1B or 2A/2B) select the output channel. This dual demux capability is explicitly stated in the device description and supported by the function table showing G as the primary control input.
Is the 74ACT11139DR still in active production?
No, the 74ACT11139DR is marked as OBSOLETE by Texas Instruments per the Package Option Addendum dated July 2014. While Aetrix Electronics maintains legacy inventory and supply support, new designs should consider active alternatives like 74ACT139D or SN74LV139A based on application requirements.
74ACT11139DR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ACT
- Package/Case:
- 16-SOIC (0.154", 3.90mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Type:
- Decoder/Demultiplexer
- Circuit:
- 1 x 2:4
- Independent Circuits:
- 2
- Current - Output High, Low:
- 24mA, 24mA
- Voltage Supply Source:
- Single Supply
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 16-SOIC
74ACT11139DR FAQ
1.How can I place an order for 74ACT11139DR through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ACT11139DR 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 74ACT11139DR reliable?
The price and inventory of 74ACT11139DR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ACT11139DR is usually 5 days.
3.What payment methods are accepted for 74ACT11139DR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ACT11139DR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ACT11139DR?
74ACT11139DR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ACT11139DR 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 74ACT11139DR?
For technical support, including 74ACT11139DR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ACT11139DR requirements.
6.How does Aetrix verify that 74ACT11139DR is sourced from the original manufacturer or authorized distributors?
All 74ACT11139DR 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 74ACT11139DR meets industry standards.
7.What is the process for return or replacement of 74ACT11139DR?
All 74ACT11139DR units undergo pre-shipment inspection (PSI). If there is an issue with 74ACT11139DR, 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 74ACT11139DR part is unused and in its original packaging.
Return procedure for 74ACT11139DR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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