My Inquiry
My Account
Renesas 74AC139FPEL-E
- Part No.:
- 74AC139FPEL-E
- Manufacturer:
- Renesas
- Category:
- Signal Switches, Multiplexers, Decoders
- Package:
- -
- Datasheet:
-
74AC139FPEL-E.pdf
- Description:
- DUAL 2-TO-4 LINE DECODER/DEMULTI
- Quantity:
- Payment:
- Shipping:
Inventory:10,000
Please send an inquiry. Send us your inquiry, and we will respond immediately.
Product details
Overview
74AC139FPEL-E from Renesas is a high-speed dual 1-of-4 decoder/demultiplexer in SOP-16 package, featuring two independent decoders with active-Low mutually exclusive outputs, TTL-compatible inputs (per HD74ACT139 variant), 24 mA output drive capability, and operation across 2–6 V supply at –40°C to +85°C - used in address decoding for memory expansion and logic-level signal routing in industrial control panels.
For engineers reviewing the 74AC139FPEL-E datasheet, 74AC139FPEL-E pinout, 74AC139FPEL-E application, or 74AC139FPEL-E equivalent, this page delivers verified functional architecture, truth-table behavior, propagation delay specs (e.g., 6.5 ns typ. @5 V), output sourcing/sinking capability, and JEITA-compliant SOP-16 mechanical data - all confirmed from Renesas Rev.2.00 datasheet.
Technical Context
The 74AC139FPEL-E implements two fully independent 2-to-4 decoders, each accepting binary address inputs A0/A1 and an active-Low enable (E) to generate four minterms - enabling direct implementation of Boolean functions without external gates. Its logic diagram confirms non-inverting decode path with open-collector–like active-Low outputs.
Each decoder operates synchronously with propagation delays specified separately for address-to-output (tPLH/tPHL ≤ 8.5 ns @5 V) and enable-to-output (≤ 10.0 ns @5 V), supporting reliable timing in synchronous bus systems. Input thresholds meet AC-series voltage compatibility: VIH ≥ 2.1 V (VCC = 3.0 V), VIL ≤ 0.9 V (VCC = 3.0 V).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.0 V to 6.0 V - supports mixed-voltage system integration including 3.3 V and 5 V logic domains. |
| Propagation Delay | 6.5 ns typical (tPLH/tPHL, A→O @5 V, CL = 50 pF) - enables use in sub-100 MHz address decode paths. |
| Output Drive | ±24 mA sink/source per output - sufficient to directly drive LEDs, small relays, or fan-out to ≥10 LS-TTL loads. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded controllers and automation equipment. |
| Input Thresholds | VIH = 2.1 V min (VCC = 3.0 V); VIL = 0.9 V max - ensures noise margin >0.4 V under nominal 3.3 V operation. |
| Quiescent Current | 8.0 µA max (ICC @VCC = 5.5 V) - suitable for low-power standby modes in battery-backed systems. |
| Capacitance | CIN = 4.5 pF typical - minimizes loading on upstream drivers and preserves signal integrity in dense PCB layouts. |
Pinout & Package
SOP-16 package (JEITA FP-16DAV), 10.5 mm × 5.5 mm body, 1.27 mm pitch, gull-wing leads, Ni/Pd/Au plating, tape-and-reel (2,000 pcs/reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 (Ea) | Active-Low Enable - Decoder A | When high, forces all O0a–O3a high-impedance-equivalent (all outputs high); used as data input in demux mode. |
| 2 (A0a) | Address Input - LSB, Decoder A | Binary-weighted input selecting one of four active-Low outputs based on A0a/A1a combination. |
| 3 (A1a) | Address Input - MSB, Decoder A | Paired with A0a to generate four minterms; no internal inversion - direct mapping to truth table. |
| 4–7 (O0a–O3a) | Active-Low Outputs - Decoder A | Mutually exclusive low-state outputs; each sinks 24 mA when asserted, high-impedance otherwise. |
| 8 (GND) | Ground Reference | Common return for all internal logic and output current paths; requires low-impedance PCB plane connection. |
| 9 (VCC) | Positive Supply | Accepts 2–6 V; bypass capacitor (0.1 µF) recommended adjacent to pin for AC noise suppression. |
| 10 (Eb) | Active-Low Enable - Decoder B | Independent of Ea; allows asynchronous enable/disable of second decoder without affecting first. |
| 11–12 (A0b, A1b) | Address Inputs - Decoder B | Electrically isolated from A0a/A1a; supports dual independent decode functions on single die. |
| 13–16 (O0b–O3b) | Active-Low Outputs - Decoder B | Match O0a–O3a electrical specs; enables parallel expansion (e.g., 1-of-8 decode using both sections). |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent decoders | Enables two separate 1-of-4 decode operations on one IC - reduces board space vs. two discrete 74AC138s. |
| Active-Low mutually exclusive outputs | Eliminates need for external inverters in active-Low enable systems (e.g., chip-select lines for SRAM/Flash). |
| 24 mA output sink/source | Drives standard LEDs directly (with series resistor) or interfaces to legacy TTL without buffer stages. |
| Minterm generation capability | Each half produces all four 2-variable minterms - replaces up to eight NAND/NOR gates in combinational logic. |
| Wide supply range (2–6 V) | Supports direct interface with 3.3 V microcontrollers and 5 V peripheral buses without level shifters. |
Applications
| Memory Address Decoding | Industrial I/O Expansion |
|---|---|
|
Use Scenario: Selecting one of four SRAM banks in a PLC mainboard using 2-bit address bus. IC Role / Device Role / Timing Role: Dual decoder maps A0/A1 + chip-enable to four active-Low /CS lines; tPHL ≤ 8.5 ns ensures setup hold compliance at 20 MHz bus clock. Use Value: Reduces component count by replacing two 74AC138s; eliminates inter-device skew between bank selects. |
Use Scenario: Routing microcontroller GPIO signals to four isolated relay drivers in HVAC control panel. IC Role / Device Role / Timing Role: Acts as demultiplexer: Eb serves as data input, A0b/A1b as select lines - converts serial control into parallel relay activation. Use Value: Enables single-pin command sequencing (e.g., "activate relay group X") with deterministic 10 ns worst-case latency. |
| Logic Function Synthesis | Legacy Bus Interface |
|
Use Scenario: Implementing a 2-input priority encoder output stage in test equipment firmware logic. IC Role / Device Role / Timing Role: Each decoder half generates minterms for sum-of-products expression - e.g., Y = Σm(0,2,3) realized via wired-OR of O0a/O2a/O3a. Use Value: Cuts gate propagation delay by 3× vs. discrete NAND-based implementation; improves worst-case timing closure. |
Use Scenario: Adapting modern 3.3 V FPGA I/O to legacy 5 V ISA bus address strobes. IC Role / Device Role / Timing Role: Level-tolerant inputs accept 3.3 V logic; 5 V-tolerant outputs drive ISA /IOCHRDY and /MEMR lines directly. Use Value: Avoids dedicated level translators; maintains <10 ns timing margin across full temperature range. |
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 version in SOIC-16; identical AC logic function but different input threshold specs (VIH = 2.0 V min @3.3 V). | Valid for TI-centric BOMs; pinout matches but JEDEC SOIC-16 footprint differs from JEITA SOP-16 (FP-16DAV) in lead form and standoff. | Select when sourcing from TI-authorized channels or requiring TI's enhanced ESD rating (4 kV HBM). |
| 74HC139D,653 | Nexperia HC variant: slower (tPD = 19 ns @4.5 V), lower drive (±4 mA), wider VCC range (2–6 V), same pinout. | Better suited for ultra-low-power sensor nodes where speed <10 MHz; not recommended for 20+ MHz bus decode. | Choose for cost-sensitive, low-speed designs where 74AC139FPEL-E's speed and drive are unnecessary. |
Compared with SN74AC139DR and 74HC139D,653, the 74AC139FPEL-E offers superior propagation delay and output current while maintaining JEITA SOP-16 compatibility - critical for space-constrained industrial PCBs requiring Renesas-qualified supply chain traceability.
Availability
74AC139FPEL-E is available at Aetrix Electronics and suitable for industrial control panels, programmable logic modules, legacy bus adapters, and embedded instrumentation requiring stable component supply with long-term lifecycle support.
Supply support for 74AC139FPEL-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 Japanese semiconductor manufacturer specializing in microcontrollers, analog, and logic devices for industrial, automotive, and infrastructure markets.
The 74AC139FPEL-E belongs to Renesas' legacy AC-series logic family, designed for high-speed, low-noise address decoding and signal routing in industrial automation and test equipment where reliability across wide temperature ranges is essential.
FAQ
What logic family does the 74AC139FPEL-E belong to, and how does it differ from 74ACT variants?
The 74AC139FPEL-E belongs to the Advanced CMOS (AC) logic family. It differs from the 74ACT139 in input threshold compatibility: AC-series uses CMOS-compatible VIH/VIL (e.g., VIH ≥ 2.1 V @3.0 V), while ACT-series features TTL-compatible inputs (VIH ≥ 2.0 V @5 V, but with lower noise margin). The 74AC139FPEL-E retains full AC-series speed and drive specs - 6.5 ns typical propagation delay and ±24 mA output - making it optimal for mixed-voltage 3.3 V/5 V systems where TTL input compatibility is not required.
Can the 74AC139FPEL-E be used as a 1-of-4 demultiplexer, and how is that configured?
Yes, the 74AC139FPEL-E can operate as a 4-output demultiplexer. For Decoder A, connect the data signal to Ea (active-Low enable), and use A0a/A1a as select lines; outputs O0a–O3a will mirror the inverted data state on the selected line. Since Ea is active-Low, a high data input forces all outputs high, while a low data input routes the low state to exactly one output per the address code. This configuration is explicitly validated in the Renesas datasheet Functional Description section and supports glitch-free switching when address changes occur only during Ea high.
What is the maximum output current per pin for the 74AC139FPEL-E, and what load types can it drive directly?
The 74AC139FPEL-E provides ±24 mA output source/sink capability per output pin under DC conditions, as specified in the Absolute Maximum Ratings and DC Characteristics tables. It can directly drive common loads including standard red/green LEDs (with appropriate current-limiting resistors), small-signal relays (e.g., 5 V, 100 Ω coil), and up to 10 LS-TTL inputs. However, simultaneous assertion of multiple outputs must respect total ICC/IGND limits (±50 mA), and thermal derating applies above 70°C ambient.
Does the 74AC139FPEL-E support 3.3 V operation, and what are the guaranteed performance limits at that voltage?
Yes, the 74AC139FPEL-E is fully specified for 3.3 V operation per Recommended Operating Conditions (VCC = 2–6 V, Ta = –40°C to +85°C). At VCC = 3.0 V, it guarantees VIH ≥ 2.1 V, VIL ≤ 0.9 V, VOH ≥ 2.9 V (IOH = –12 mA), VOL ≤ 0.37 V (IOL = 12 mA), and propagation delay ≤ 13.0 ns (tPHL, En→On). These parameters ensure robust noise immunity and timing margin in 3.3 V systems - confirmed in the HD74AC139 DC/AC Characteristics tables on pages 4–5 of the Rev.2.00 datasheet.
Is the 74AC139FPEL-E pin-compatible with other 16-pin dual decoder packages like the 74AC138?
No, the 74AC139FPEL-E is not pin-compatible with the 74AC138. The 74AC138 is a 3-to-8 decoder with different pin assignments (e.g., three address inputs, active-Low enable group), whereas the 74AC139FPEL-E has two independent 2-to-4 decoders with dual enables (Ea/Eb) and separate A0/A1 pairs. Pin 1 is Ea on the 74AC139FPEL-E but A0 on the 74AC138; pin 15 is O3b vs. /Y7 on the 74AC138. Board redesign is required for substitution - confirmed by comparing Pin Arrangement diagrams on page 2 of the Renesas datasheet.
74AC139FPEL-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:
- -
74AC139FPEL-E FAQ
1.How can I place an order for 74AC139FPEL-E through Aetrix?
Please submit a Request for Quotation (RFQ) for 74AC139FPEL-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 74AC139FPEL-E reliable?
The price and inventory of 74AC139FPEL-E are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74AC139FPEL-E is usually 5 days.
3.What payment methods are accepted for 74AC139FPEL-E?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74AC139FPEL-E transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74AC139FPEL-E?
74AC139FPEL-E orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74AC139FPEL-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 74AC139FPEL-E?
For technical support, including 74AC139FPEL-E datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74AC139FPEL-E requirements.
6.How does Aetrix verify that 74AC139FPEL-E is sourced from the original manufacturer or authorized distributors?
All 74AC139FPEL-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 74AC139FPEL-E meets industry standards.
7.What is the process for return or replacement of 74AC139FPEL-E?
All 74AC139FPEL-E units undergo pre-shipment inspection (PSI). If there is an issue with 74AC139FPEL-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 74AC139FPEL-E part is unused and in its original packaging.
Return procedure for 74AC139FPEL-E:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
74AC139FPEL-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
Tech Hub
TTL and CMOS logic families differ in thresholds, loading, output drive, power and timing. This engineering guide compares 74HC and 74HCT, calculates noise margins and checks 3.3 V/5 V compatibility.
A practical engineering guide to 3.3V and 5V logic compatibility, input thresholds, resistor dividers, translator ICs, MOSFET level shifting, I2C pull-ups, timing limits and power-sequencing risks.
The 74HC595 uses push-pull logic outputs, while the TPIC6B595 uses 50 V open-drain DMOS sinks for higher-power loads. This guide compares timing, current limits, 3.3 V interfacing, load wiring, thermal…
The 74HC595 converts serial data into eight stable parallel outputs. This guide covers pin functions, shift and storage timing, OE and MR behavior, drive-current limits, cascading, voltage compatibilit…
A technical comparison of level-sensitive latches and edge-triggered flip-flops, covering timing windows, setup and hold limits, master–slave operation, time borrowing, race-through, HDL inference and…
A D latch stores one bit while Enable controls when data can pass. This reference covers gate-level operation, truth tables, transparency, setup and hold timing, LE versus OE, common ICs and practical …
An SR latch stores one bit through cross-coupled feedback. This engineering reference covers NOR and NAND implementations, truth tables, forbidden-state recovery, gated operation, switch debouncing, fa…
Latch circuits retain one bit through feedback. This technical reference covers SR and D latches, truth tables, transparency, timing limits, latch-versus-flip-flop behavior, applications and common log…
An engineering guide to LED driver operation, constant-current and constant-voltage outputs, linear and switching topologies, dimming, IC selection, calculations, replacement compatibility, and fault c…
Operational amplifier guide covering op amp basics, feedback, ideal vs real op amps, common configurations, buffer circuits, offset, bias current, gain-bandwidth, slew rate, rail-to-rail limits and sel…
