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Renesas 74AC139FP-E
- Part No.:
- 74AC139FP-E
- Manufacturer:
- Renesas
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- -
- Datasheet:
-
74AC139FP-E.pdf
- Description:
- DUAL 2-TO-4 LINE DECODER/DEMUX
- Quantity:
- Payment:
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Inventory:9,600
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Product details
Overview
74AC139FP-E from Renesas is a high-speed dual 1-of-4 decoder/demultiplexer in SOP-16 package, featuring two independent decoders with active-Low enable inputs and mutually exclusive active-Low outputs. It operates across 2–6 V supply, delivers ±24 mA output drive, supports –40°C to +85°C industrial temperature range, and achieves 6.5 ns typical propagation delay (5 V, CL = 50 pF). It is used in address decoding, data routing, and logic function generation in digital control systems.
For engineers reviewing the 74AC139FP-E datasheet, 74AC139FP-E pinout, 74AC139FP-E application, or 74AC139FP-E equivalent, key selection criteria include active-Low output polarity, dual-decoder independence, TTL-compatible input thresholds (for AC variant), 24 mA sink/source capability, and SOP-16 JEITA-compliant footprint compatibility with HD74AC139AFPEL ordering code.
Technical Context
The 74AC139FP-E implements two fully isolated 2-to-4 binary decoders, each accepting A0/A1 address inputs and an active-Low Enable (E) signal. When E is High, all four outputs per section are forced High; when E is Low, exactly one output goes Low based on A1A0 state (00→O0, 01→O1, 10→O2, 11→O3).
Each decoder functions as a 4-output demultiplexer when E serves as data input, and generates all four minterms of two variables-enabling gate-level logic reduction. Its AC logic family ensures CMOS-level noise immunity and rail-to-rail voltage operation without TTL input buffering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2 V to 6 V - supports mixed-voltage system interfacing and battery-backed 3.3 V or 5 V logic domains. |
| Propagation Delay | 6.5 ns typ. (5 V, CL = 50 pF) - enables reliable timing in sub-100 MHz synchronous control paths. |
| Output Drive | ±24 mA - directly drives LED indicators, small-signal MOSFET gates, or multiple 74AC inputs without buffers. |
| Input Thresholds | VIH = 2.1 V min. (VCC = 3 V); VIL = 0.9 V max. - ensures robust noise margin with 3.3 V CMOS and 5 V TTL sources. |
| Operating Temperature | –40°C to +85°C - qualified for industrial automation, motor control, and embedded instrumentation environments. |
| Power Dissipation Cap. | 40.0 pF - allows accurate dynamic power estimation at 10 MHz toggle rate using CPD × V² × f formula. |
Pinout & Package
SOP-16 package (JEITA FP-16DAV), 10.5 mm × 7.8 mm body, 1.27 mm pitch, gull-wing leads, Ni/Pd/Au plating, 0.24 g mass.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Ea) | Active-Low Enable - Decoder A | Enables/disables Decoder A outputs; tied High disables all O0a–O3a (all High). |
| 2 (A0a) | Address Input - LSB, Decoder A | Binary weight 1 input; combined with A1a selects active output O0a–O3a. |
| 3 (A1a) | Address Input - MSB, Decoder A | Binary weight 2 input; determines decoded output mapping per truth table. |
| 4 (O0a) | Active-Low Output - Decoder A | Low only when Ea = L, A1aA0a = 00; sinks 24 mA for direct LED/relay drive. |
| 5 (O1a) | Active-Low Output - Decoder A | Low only when Ea = L, A1aA0a = 01; mutually exclusive with O0a/O2a/O3a. |
| 6 (O3a) | Active-Low Output - Decoder A | Low only when Ea = L, A1aA0a = 11; complements standard 1-of-4 decode sequence. |
| 7 (O2a) | Active-Low Output - Decoder A | Low only when Ea = L, A1aA0a = 10; completes full minterm set for two-variable logic. |
| 8 (GND) | Ground Reference | Common return path for all internal logic and output current; requires low-impedance PCB plane. |
| 9 (VCC) | Positive Supply | 2–6 V CMOS supply; bypass capacitor (0.1 µF) required within 5 mm of pin for noise suppression. |
| 10 (Eb) | Active-Low Enable - Decoder B | Independent enable for second decoder; no electrical coupling to Ea or Decoder A. |
| 11 (A0b) | Address Input - LSB, Decoder B | Functionally identical to A0a but electrically isolated; supports parallel decode operations. |
| 12 (A1b) | Address Input - MSB, Decoder B | Paired with A0b to select O0b–O3b; enables dual-channel address expansion. |
| 13 (O0b) | Active-Low Output - Decoder B | Low when Eb = L, A1bA0b = 00; shares same drive strength and timing as O0a. |
| 14 (O1b) | Active-Low Output - Decoder B | Low when Eb = L, A1bA0b = 01; maintains strict mutual exclusivity within Decoder B. |
| 15 (O2b) | Active-Low Output - Decoder B | Low when Eb = L, A1bA0b = 10; supports independent function generation per half. |
| 16 (O3b) | Active-Low Output - Decoder B | Low when Eb = L, A1bA0b = 11; completes second minterm set for logic minimization. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent decoders | Two physically and electrically isolated 2-to-4 decode sections share only VCC/GND - enables concurrent address decoding for separate peripherals. |
| Active-Low mutually exclusive outputs | All four outputs per decoder are never simultaneously Low; eliminates bus contention and simplifies wired-OR logic design. |
| 24 mA output sink/source | Drives standard LEDs (20 mA), small-signal transistors, or up to 10 74AC inputs without external buffers - reduces BOM count. |
| Minterm generation capability | Each decoder produces all four canonical minterms (A̅B̅, A̅B, AB̅, AB) - replaces discrete NAND/NOR gates in combinational logic synthesis. |
| Wide 2–6 V supply range | Operates identically across 3.3 V microcontroller I/O and legacy 5 V backplane systems - eliminates level-shifter requirements. |
Applications
| Memory Address Decoding | Peripheral Select Logic |
|---|---|
|
Use Scenario: Selecting one of four SRAM or EEPROM chips in a microcontroller-based data logger. IC Role / Device Role / Timing Role: Dual decoder maps upper address bits to individual chip-enable lines, enabling banked memory access. Use Value: Reduces address decoding latency to ≤9.5 ns (max), ensuring zero-wait-state operation at 20 MHz bus clock. |
Use Scenario: Enabling specific sensors (temperature, pressure, humidity, accelerometer) on a shared I²C bus during sequential polling. IC Role / Device Role / Timing Role: Acts as demultiplexer: microcontroller GPIO drives Ea/Eb while A0a/A1a route clock/data to selected sensor. Use Value: Eliminates need for four separate enable lines; saves four MCU pins and simplifies firmware address management. |
| LED Segment Driver Interface | Logic Function Generator |
|
Use Scenario: Driving four common-anode 7-segment displays in a programmable logic controller HMI panel. IC Role / Device Role / Timing Role: Each decoder output (O0a–O3a) switches a PNP transistor to energize one display digit. Use Value: ±24 mA output drive directly saturates base-emitter junctions - no base resistors required, reducing component count by 8. |
Use Scenario: Implementing a 2-input priority encoder or parity generator in a safety-critical PLC module with minimal gate count. IC Role / Device Role / Timing Role: Generates minterms A̅B̅, A̅B, AB̅, AB; external OR gates combine terms to realize custom Boolean functions. Use Value: Replaces up to eight discrete NAND gates - cuts PCB area by 35% and improves thermal reliability over multi-chip solutions. |
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 |
|---|---|---|---|
| SN74AC139DR | Texas Instruments part in SOIC-16; identical AC logic family, same 2–6 V range and 24 mA drive, but uses JEDEC SOIC footprint (wider 7.5 mm body vs. JEITA FP-16DAV's 7.8 mm length). | Requires PCB land pattern revision due to 1.27 mm pitch but different pad width/length; not drop-in compatible with 74AC139FP-E layout. | Select when sourcing TI-qualified supply chain or requiring TI's enhanced ESD rating (4 kV HBM). |
| 74HC139PW,118 | Nexperia part in TSSOP-16; HC logic family, lower drive (±7.8 mA), slower propagation (19 ns typ. at 4.5 V), but identical pinout and JEDEC TSSOP-16 footprint. | Not suitable for driving LEDs or heavy capacitive loads; acceptable only where fanout ≤4 and speed <10 MHz. | Choose for cost-sensitive consumer applications where reduced drive and speed are acceptable trade-offs. |
Compared with SN74AC139DR and 74HC139PW,118, the 74AC139FP-E offers JEITA SOP-16 compatibility, higher output drive, and faster timing - making it optimal for industrial designs requiring robust load handling and tight setup/hold margins.
Availability
74AC139FP-E is available at Aetrix Electronics and suitable for industrial control panels, programmable logic controllers, and embedded instrumentation requiring stable component supply with long-term lifecycle assurance.
Supply support for 74AC139FP-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 specializing in microcontrollers, analog, power, and timing solutions for industrial, automotive, and infrastructure markets.
The HD74AC139 series belongs to Renesas' legacy AC logic product line, designed for high-speed, low-power digital interface and address decoding in industrial control and instrumentation systems.
FAQ
What is the maximum operating frequency supported by the 74AC139FP-E?
The 74AC139FP-E does not specify a maximum clock frequency, as it is a combinational logic device without internal clocking. Its usable toggle rate depends on propagation delay and load capacitance: with 50 pF load and 5 V supply, the 9.5 ns max tPHL/tPLH allows reliable operation up to approximately 50 MHz in feedback-free decode paths. System-level timing must account for board trace delays and downstream input capacitance.
Can the 74AC139FP-E be used as a 1-to-4 demultiplexer?
Yes, the 74AC139FP-E can operate as two independent 1-to-4 demultiplexers. For Decoder A, connect data signal to Ea (active-Low enable), and use A0a/A1a as select lines; outputs O0a–O3a will replicate the inverted data signal on the selected line. This configuration is explicitly validated in the functional description and truth table of the 74AC139FP-E datasheet.
Is the 74AC139FP-E pin-compatible with the 74ACT139 variants?
No, the 74AC139FP-E is not pin-compatible with 74ACT139 variants. While both share identical pin numbering and decoder functionality, the 74ACT139 has TTL-compatible input thresholds (VIH = 2.0 V min. at 4.5 V), whereas the 74AC139FP-E requires higher VIH (2.1 V min. at 3 V). Interchanging them may cause logic threshold violations in mixed-signal systems.
What is the recommended bypass capacitor for the 74AC139FP-E?
A 0.1 µF ceramic capacitor placed within 5 mm of the VCC (pin 9) and GND (pin 8) pins is recommended for the 74AC139FP-E. This value suppresses high-frequency switching noise generated during output transitions, especially critical when driving capacitive loads >30 pF or operating near 5 V. A second 4.7 µF tantalum capacitor nearby improves low-frequency supply stability.
Does the 74AC139FP-E support mixed-voltage operation between its inputs and outputs?
No, the 74AC139FP-E does not support true mixed-voltage operation. All inputs and outputs reference the same VCC supply (2–6 V). Input voltage limits are 0 to VCC, and output high/low levels track VCC proportionally. To interface with 3.3 V controllers and 5 V peripherals, external level-shifting circuitry is required - the device itself cannot translate between disparate supply domains.
74AC139FP-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:
- -
74AC139FP-E FAQ
1.How can I place an order for 74AC139FP-E through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AC139FP-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 74AC139FP-E reliable?
The price and inventory of 74AC139FP-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AC139FP-E is usually 5 days.
3.What payment methods are accepted for 74AC139FP-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AC139FP-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AC139FP-E?
74AC139FP-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AC139FP-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 74AC139FP-E?
For technical support, including 74AC139FP-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AC139FP-E requirements.
6.How does Aetrix verify that 74AC139FP-E is sourced from the original manufacturer or authorized distributors?
All 74AC139FP-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 74AC139FP-E meets industry standards.
7.What is the process for return or replacement of 74AC139FP-E?
All 74AC139FP-E units undergo pre-shipment inspection (PSI). If there is an issue with 74AC139FP-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 74AC139FP-E part is unused and in its original packaging.
Return procedure for 74AC139FP-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74AC139FP-E Tags
-
SN74HC138DR
Texas Instruments
-
TC7SB3157CFU,LF(CT
Toshiba Semiconductor and Storage
-
74CBTLV3257PW,118
Nexperia USA Inc.
-
SN74CBTLV3257PWR
Texas Instruments
-
74CBTLV3257GUX
Nexperia USA Inc.
-
74HC154BQ,118
Nexperia USA Inc.
-
P3S0200GMX
NXP USA Inc.
-
SN74CB3Q3245PWR
Texas Instruments
-
SN74CB3Q3257RGYR
Texas Instruments
-
TCA9543APWR
Texas Instruments
-
TCA9546APWR
Texas Instruments
-
SN74HC138N
Texas Instruments
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