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Renesas 74ACT139FPEL-E
- Part No.:
- 74ACT139FPEL-E
- Manufacturer:
- Renesas
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- -
- Datasheet:
-
74ACT139FPEL-E.pdf
- Description:
- DUAL 2-TO-4 LINE DECODER/DEMULTI
- Quantity:
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Product details
Overview
74ACT139FPEL-E from Renesas is a dual 1-of-4 decoder/demultiplexer IC with TTL-compatible inputs, active-Low mutually exclusive outputs, ±24 mA output drive capability, and propagation delays as low as 6.0 ns at 5.0 V. It operates across 2–6 V supply and –40°C to +85°C, serving in address decoding, data routing, and logic function generation for industrial control and embedded digital systems.
For engineers reviewing the 74ACT139FPEL-E datasheet, 74ACT139FPEL-E pinout, 74ACT139FPEL-E application, or 74ACT139FPEL-E equivalent, this page delivers verified functional behavior, package-specific terminal mapping, real-world use cases, and validated alternative options - all grounded in Renesas' official HD74ACT139 documentation (Rev.2.00, Jul.2004).
Technical Context
The 74ACT139FPEL-E integrates two independent decoders, each accepting two binary address inputs (A0, A1) and producing four active-Low minterm outputs (O0–O3), with separate active-Low enable inputs (Ea, Eb) that double as demultiplexer data inputs. Its TTL-compatible input thresholds (VIH = 2.0 V min, VIL = 0.8 V max at VCC = 4.5–5.5 V) ensure interoperability with legacy 5 V logic families.
Each decoder functions as a complete 2-variable minterm generator, eliminating need for discrete gate combinations in combinational logic synthesis. Output drive strength (±24 mA) supports direct fanout to multiple 74ACT inputs or LED loads without buffering, while AC characteristics are specified under CL = 50 pF and full temperature range.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.0–6.0 V - supports mixed-voltage system interfacing and 3.3 V/5 V operation without level shifters |
| Propagation Delay (An→On) | 6.0–9.5 ns at 5.0 V - enables high-speed address decoding in microcontroller peripheral selection |
| Output Drive Current | ±24 mA - drives up to 10 standard 74ACT inputs or directly sinks 10 mA LED loads per output |
| Input Thresholds | VIH = 2.0 V min, VIL = 0.8 V max at VCC = 5.5 V - ensures reliable recognition of TTL-level signals |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded control and instrumentation environments |
| Input Capacitance | 4.5 pF - minimizes loading on upstream drivers and preserves signal integrity in dense PCB layouts |
| Quiescent ICC | 8.0 µA max - enables low-static-power operation in battery-backed or always-on logic subsystems |
Pinout & Package
SOP-16 pin (JEITA FP-16DAV) package, lead-free, tape-and-reel (2,000 pcs/reel), body size 10.5 mm × 5.5 mm × 1.75 mm max.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Ea) | Decoder A Enable Input | Active-Low control: when High, forces O0a–O3a High; when Low, enables decoding of A0a/A1a |
| 2 (A0a) | Decoder A LSB Address Input | Binary weight 2⁰; selects output O0a/O1a (A0a=0) or O2a/O3a (A0a=1) when Ea is active |
| 3 (A1a) | Decoder A MSB Address Input | Binary weight 2¹; selects O0a/O2a (A1a=0) or O1a/O3a (A1a=1) with A0a |
| 4 (O0a) | Decoder A Output 0 | Active-Low minterm output for A1a=0, A0a=0; sinks current when selected |
| 5 (O1a) | Decoder A Output 1 | Active-Low minterm output for A1a=0, A0a=1 |
| 6 (O3a) | Decoder A Output 3 | Active-Low minterm output for A1a=1, A0a=1 - note non-sequential pin order (O3a before O2a) |
| 7 (O2a) | Decoder A Output 2 | Active-Low minterm output for A1a=1, A0a=0 |
| 8 (GND) | Ground Reference | Common return path for all internal logic and output currents |
| 9 (VCC) | Positive Supply | Primary power rail (2–6 V); decoupling capacitor required near pin for noise suppression |
| 10 (Eb) | Decoder B Enable Input | Independent active-Low enable for second decoder; no electrical coupling to Ea |
| 11 (A0b) | Decoder B LSB Address Input | Functionally identical to A0a but isolated; allows concurrent dual decoding |
| 12 (A1b) | Decoder B MSB Address Input | Functionally identical to A1a; enables full 4-output demux per section |
| 13 (O0b) | Decoder B Output 0 | Active-Low minterm for A1b=0, A0b=0; electrically isolated from O0a group |
| 14 (O1b) | Decoder B Output 1 | Active-Low minterm for A1b=0, A0b=1 |
| 15 (O2b) | Decoder B Output 2 | Active-Low minterm for A1b=1, A0b=0 |
| 16 (O3b) | Decoder B Output 3 | Active-Low minterm for A1b=1, A0b=1 |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent decoders | Enables simultaneous 2-bit address decoding for separate memory banks or peripheral groups without shared timing constraints |
| TTL-compatible inputs | Accepts standard 5 V TTL logic levels (0.8 V/2.0 V thresholds), ensuring plug-in compatibility with legacy 74LS/74F systems |
| Active-Low mutually exclusive outputs | Guarantees only one output per decoder is asserted at a time, preventing bus contention in wired-OR configurations |
| 24 mA output sink/source | Drives heavy capacitive loads or multiple downstream gates directly, reducing need for external buffers |
| Minterm generation capability | Each half produces all four 2-variable minterms (A̅B̅, A̅B, AB̅, AB), replacing up to eight discrete NAND/NOR gates |
Applications
| Memory Address Decoding | Peripheral Select Logic |
|---|---|
|
Use Scenario: Selecting one of four SRAM or ROM chips in an 8-bit microcontroller system using A1–A0 address lines. IC Role / Device Role / Timing Role: Dual decoder maps low-order address bits to chip-select signals, with Ea/Eb tied to higher address bits or control strobes. Use Value: Eliminates discrete gate networks; propagation delay ≤9.5 ns ensures setup/hold compliance with 10 MHz bus cycles. |
Use Scenario: Routing UART, SPI, or GPIO peripheral enable signals in a modular I/O expansion board. IC Role / Device Role / Timing Role: Acts as demultiplexer: Ea/Eb serve as data inputs, A0a/A1a as select lines, generating four independent active-Low enables. Use Value: Reduces component count vs. discrete AND gates; ±24 mA drive supports direct connection to enable inputs of multiple peripherals. |
| Logic Function Synthesis | Industrial Control Panel Interface |
|
Use Scenario: Implementing 2-input combinational logic (e.g., XOR, NAND, OR) in programmable logic replacements for legacy PLC modules. IC Role / Device Role / Timing Role: Generates all four minterms per decoder; external wired-OR or pull-up networks combine terms into final Boolean functions. Use Value: Replaces up to eight 74ACT00 NAND gates per decoder half, cutting board space and power by >50% in fixed-function logic blocks. |
Use Scenario: Scanning 4×4 keypad matrix or enabling status LEDs for four machine states in factory HMI hardware. IC Role / Device Role / Timing Role: Decoder outputs drive LED anodes/cathodes or scan row/column lines; Ea/Eb synchronized to microcontroller scan clock. Use Value: 24 mA per output drives standard 5 mm LEDs at full brightness without series resistors; SOP-16 footprint fits compact front-panel PCBs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar dual 1-of-4 decoder applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ACT139DR | Texas Instruments part in SOIC-16; identical logic function, AC/DC specs, and pinout; same 2–6 V operation and –40°C to +85°C rating | Direct drop-in replacement with identical timing and drive; TI's qualification includes extended burn-in for automotive-temp variants | Select SN74ACT139DR when sourcing from TI-authorized channels or requiring TI's long-term product change notification (PCN) process |
| 74VHC139M | ON Semiconductor part in SOIC-16; lower supply range (2–5.5 V), higher speed (tPD = 5.5 ns typ at 5 V), but only ±8 mA output drive | Higher speed suits faster control loops, but requires buffer stages for >8 mA loads; not suitable for direct LED driving | Choose 74VHC139M where propagation delay is critical and load current ≤8 mA; verify VCC stability at 5.5 V edge case |
Compared with 74ACT139FPEL-E, SN74ACT139DR offers identical performance and form factor with TI's support infrastructure, while 74VHC139M trades output drive for speed - making it viable only when load requirements are light and timing margins tight.
Availability
74ACT139FPEL-E is available at Aetrix Electronics and suitable for industrial control panels, microcontroller peripheral selection, and logic function synthesis requiring stable component supply, long-lifecycle assurance, and RoHS-compliant packaging.
Supply support for 74ACT139FPEL-E 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
Renesas Electronics Corporation is a global semiconductor leader delivering microcontrollers, analog, power, and SoC solutions for automotive, industrial, and enterprise applications.
The HD74ACT139 product line delivers high-speed, TTL-compatible logic ICs optimized for robust industrial and embedded digital systems requiring precise timing, wide voltage operation, and long-term supply stability.
FAQ
What is the maximum operating supply voltage for the 74ACT139FPEL-E?
The 74ACT139FPEL-E supports a supply voltage range of 2.0 V to 6.0 V, with absolute maximum rating of 7.0 V. Operation above 6.0 V violates recommended conditions and risks parametric degradation or latch-up. At 6.0 V, DC characteristics such as VOH and VOL remain within specification, and propagation delay improves marginally versus 5.0 V operation.
Does the 74ACT139FPEL-E support 3.3 V logic systems?
Yes, the 74ACT139FPEL-E is fully operational at 3.3 V supply, with VIH = 2.1 V min and VIL = 0.9 V max at VCC = 3.0 V per datasheet. Its TTL-compatible inputs recognize 3.3 V CMOS outputs reliably, and output drive remains ±24 mA, enabling direct interface with 3.3 V peripherals without level translation.
How are the outputs of the 74ACT139FPEL-E configured - active-High or active-Low?
All eight outputs (O0a–O3a, O0b–O3b) of the 74ACT139FPEL-E are active-Low and mutually exclusive. When enabled, exactly one output per decoder goes Low based on A0/A1 state; all others remain High. This configuration simplifies wired-OR bus arbitration and direct LED cathode driving.
Can the 74ACT139FPEL-E be used as a 1-to-4 demultiplexer?
Yes - each half of the 74ACT139FPEL-E functions as a 1-to-4 demultiplexer by using its active-Low enable input (Ea or Eb) as the data input and A0/A1 as select lines. When Ea is Low, the data appears inverted on the selected O0a–O3a output; when Ea is High, all outputs stay High regardless of A0/A1.
What is the thermal performance of the 74ACT139FPEL-E in SOP-16 package?
The 74ACT139FPEL-E in FP-16DAV SOP-16 package has a typical thermal resistance θJA of 120°C/W. At maximum rated ICC (80 µA) and 24 mA output load on one channel, power dissipation stays below 50 mW, resulting in <6°C junction rise above ambient - well within safe operating limits for industrial PCB layouts without forced airflow.
74ACT139FPEL-E Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Renesas
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Type:
- -
- Circuit:
- -
- Independent Circuits:
- -
- Current - Output High, Low:
- -
- Voltage Supply Source:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
74ACT139FPEL-E FAQ
1.How can I place an order for 74ACT139FPEL-E through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ACT139FPEL-E 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 74ACT139FPEL-E reliable?
The price and inventory of 74ACT139FPEL-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ACT139FPEL-E is usually 5 days.
3.What payment methods are accepted for 74ACT139FPEL-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ACT139FPEL-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ACT139FPEL-E?
74ACT139FPEL-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ACT139FPEL-E 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 74ACT139FPEL-E?
For technical support, including 74ACT139FPEL-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ACT139FPEL-E requirements.
6.How does Aetrix verify that 74ACT139FPEL-E is sourced from the original manufacturer or authorized distributors?
All 74ACT139FPEL-E 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 74ACT139FPEL-E meets industry standards.
7.What is the process for return or replacement of 74ACT139FPEL-E?
All 74ACT139FPEL-E units undergo pre-shipment inspection (PSI). If there is an issue with 74ACT139FPEL-E, 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 74ACT139FPEL-E part is unused and in its original packaging.
Return procedure for 74ACT139FPEL-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74ACT139FPEL-E Tags
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