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Home > Products > Integrated Circuits (ICs) > Logic > Signal Switches, Multiplexers, Decoders

Texas Instruments 74ACT11139PWR

Name: 74ACT11139PWR
Brand: Texas Instruments
SKU: 74ACT11139PWR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74ACT11139PWR

Manufacturer:: Texas Instruments

Category:: Signal Switches, Multiplexers, Decoders

Package:: 16-TSSOP (0.173", 4.40mm Width)

Datasheet:: 74ACT11139PWR.pdf

Description:: IC DECODER/DEMUX 1X2:4 16TSSOP

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Product details

Overview

74ACT11139PWR from Texas Instruments is a dual 2-line-to-4-line decoder/demultiplexer in TSSOP-16 package, designed for high-speed memory decoding and data routing. It features TTL-compatible inputs, fully buffered inputs (1 normalized load each), dual active-low enables (1G/2G) for cascading or demux control, and operates from −40°C to 85°C at 4.5–5.5 V supply. Used in address decoding for SRAM/ROM subsystems where sub-8.5 ns propagation delay is critical.

For engineers reviewing the 74ACT11139PWR datasheet, 74ACT11139PWR pinout, 74ACT11139PWR application, or 74ACT11139PWR equivalent, this page delivers verified functional identity, validated TSSOP-16 pin mapping, confirmed electrical specs (tPLH/tPHL ≤ 8.5 ns, IOH/IOL = ±24 mA), and real-world use context in memory systems and synchronous data transmission paths.

Technical Context

The 74ACT11139PWR integrates two independent 2-to-4 decoders with fully synchronous operation-each decoder accepts two address inputs (A, B) and one active-low enable (G), producing four active-low outputs (Y0–Y3). Inputs are TTL-voltage compatible (VIH = 2 V min, VIL = 0.8 V max), enabling direct interfacing with legacy TTL logic without level shifters.

Its EPIC™ 1-µm CMOS process delivers 500-mA latch-up immunity at 125°C and supports rail-to-rail output swing (VOH ≥ 3.94 V at VCC = 4.5 V, VOL ≤ 0.44 V at IOL = 24 mA). Center-pin VCC/GND placement minimizes high-speed switching noise in dense PCB layouts.

Key Specifications

Parameter	Value and Actual Design Meaning
Logic Function	Dual 2-line-to-4-line decoder / demultiplexer with active-low enables and outputs
Propagation Delay (tPLH/tPHL)	≤ 8.5 ns at VCC = 5 V - enables sub-10 ns address decode cycles in fast memory systems
Output Drive (IOH/IOL)	±24 mA - sufficient to drive 10 LSTTL loads or 20 ACT loads without buffering
Supply Voltage Range	4.5 V to 5.5 V - compatible with standard 5-V logic rails and tolerant of ±10% regulation variation
Operating Temperature	−40°C to +85°C - qualified for industrial-grade embedded and computing applications
Input Compatibility	TTL-voltage compatible (VIH ≥ 2 V, VIL ≤ 0.8 V) - eliminates need for external level translators when interfacing with 74LS/74F families
Power Dissipation Capacitance	47 pF at 1 MHz - enables accurate dynamic power estimation in high-frequency toggle scenarios

Pinout & Package

TSSOP-16 (PW) package: 4.4 mm × 5.0 mm body, 0.65 mm lead pitch, 1.2 mm max height, RoHS-compliant NiPdAu lead finish, MSL Level-1.

Pin/Terminal	Circuit Role	Design Meaning
1	1Y1	Active-low output of Decoder 1, Y1 (2-to-4 decoded result)
2	1Y2	Active-low output of Decoder 1, Y2
3	1Y3	Active-low output of Decoder 1, Y3
4	GND	Ground reference for both decoders and internal logic
5	2Y0	Active-low output of Decoder 2, Y0
6	2Y1	Active-low output of Decoder 2, Y1
7	2Y2	Active-low output of Decoder 2, Y2
8	2Y3	Active-low output of Decoder 2, Y3
9	1Y0	Active-low output of Decoder 1, Y0
10	1A	Address input A for Decoder 1 (LSB)
11	1B	Address input B for Decoder 1 (MSB)
12	1G	Active-low enable for Decoder 1 - enables Y0–Y3 when low
13	VCC	+5 V supply for both decoders (center-pin placement reduces noise coupling)
14	2G	Active-low enable for Decoder 2
15	2A	Address input A for Decoder 2
16	2B	Address input B for Decoder 2

Key Features

Feature	Design Value
Dual independent decoders	Two fully isolated 2-to-4 decoding blocks share only VCC/GND - enables parallel address decode or split data routing
Active-low enables (1G/2G)	Supports hierarchical decoding (e.g., chip-select + block-select) or demux mode where enables act as data lines
Center-pin VCC/GND	Reduces simultaneous switching noise (SSN) by symmetric current return path - critical for stable timing in high-density boards
EPIC™ 1-µm CMOS process	Delivers latch-up immunity >500 mA at 125°C - ensures robustness in industrial environments with thermal stress
Normalized input loading	Each input presents exactly 1 standardized load - simplifies fanout calculation and eliminates signal integrity surprises

Applications

Memory Address Decoding	SRAM/ROM Chip Selection
Use Scenario: Selecting one of four memory banks in a 16-bit microprocessor system using A15–A14 address bits. IC Role / Device Role / Timing Role: Dual decoder maps two MSBs to four active-low chip-select signals (CS0–CS3), synchronized with clock-driven address latching. Use Value: 8.5 ns max propagation delay ensures setup time compliance for 100+ MHz bus cycles without adding wait states.	Use Scenario: Enabling individual 32K×8 SRAM chips in a banked memory architecture with shared data/address buses. IC Role / Device Role / Timing Role: 74ACT11139PWR acts as bank selector - 1G/2G driven by upper address bits and memory controller strobes. Use Value: TTL-compatible inputs accept direct connection to 74F244 address buffers; ±24 mA outputs drive multiple SRAM CE# pins reliably.
Data Demultiplexing	Synchronous Logic Control
Use Scenario: Routing a single 4-bit data bus to one of four peripheral registers based on command opcode. IC Role / Device Role / Timing Role: 74ACT11139PWR configured as 1-of-4 demux - enables (1G/2G) controlled by opcode bits, outputs drive register WE# lines. Use Value: Fully synchronous behavior prevents glitches during opcode transitions; active-low outputs match common register write-enable polarity.	Use Scenario: Generating four phase-aligned control signals for a pipelined ALU stage in an FPGA co-processor interface. IC Role / Device Role / Timing Role: Decoder outputs trigger latch enables (LE) for pipeline registers, timed precisely relative to system clock edge. Use Value: Sub-9 ns delay matches tight timing budgets; center-pin VCC/GND minimizes skew between control signal edges.

Memory Address Decoding

SRAM/ROM Chip Selection

Use Scenario: Selecting one of four memory banks in a 16-bit microprocessor system using A15–A14 address bits.

IC Role / Device Role / Timing Role: Dual decoder maps two MSBs to four active-low chip-select signals (CS0–CS3), synchronized with clock-driven address latching.

Use Value: 8.5 ns max propagation delay ensures setup time compliance for 100+ MHz bus cycles without adding wait states.

Use Scenario: Enabling individual 32K×8 SRAM chips in a banked memory architecture with shared data/address buses.

IC Role / Device Role / Timing Role: 74ACT11139PWR acts as bank selector - 1G/2G driven by upper address bits and memory controller strobes.

Use Value: TTL-compatible inputs accept direct connection to 74F244 address buffers; ±24 mA outputs drive multiple SRAM CE# pins reliably.

Data Demultiplexing

Synchronous Logic Control

Use Scenario: Routing a single 4-bit data bus to one of four peripheral registers based on command opcode.

IC Role / Device Role / Timing Role: 74ACT11139PWR configured as 1-of-4 demux - enables (1G/2G) controlled by opcode bits, outputs drive register WE# lines.

Use Value: Fully synchronous behavior prevents glitches during opcode transitions; active-low outputs match common register write-enable polarity.

Use Scenario: Generating four phase-aligned control signals for a pipelined ALU stage in an FPGA co-processor interface.

IC Role / Device Role / Timing Role: Decoder outputs trigger latch enables (LE) for pipeline registers, timed precisely relative to system clock edge.

Use Value: Sub-9 ns delay matches tight timing budgets; center-pin VCC/GND minimizes skew between control signal edges.

Equivalent & Alternatives

The following parts are listed as comparable options for similar dual 2-to-4 decoder applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
74ACT139D	Same logic function and pinout (SOIC-16), but rated for 4.5–5.5 V only; identical tPLH/tPHL (≤8.5 ns) and drive (±24 mA)	Requires SOIC footprint; lacks TSSOP's space savings and thermal performance in compact designs	Select 74ACT139D if board uses SOIC-16 land pattern and volume cost is prioritized over density
SN74LV139APW	Lower voltage operation (2–5.5 V), reduced drive (±12 mA), longer delay (tPLH ≤ 12.5 ns at 3.3 V); pin-compatible TSSOP-16	Better suited for mixed-voltage 3.3 V systems; insufficient drive for legacy TTL loads or high-fanout 5 V buses	Choose SN74LV139APW only when migrating to 3.3 V logic and fanout ≤ 5 LSTTL loads is acceptable

Compared with 74ACT11139PWR, 74ACT139D offers identical performance in SOIC packaging but no size advantage, while SN74LV139APW trades speed and drive strength for broader voltage range - making the 74ACT11139PWR optimal for space-constrained, high-speed 5 V memory systems requiring TTL compatibility and noise resilience.

Availability

74ACT11139PWR is available at Aetrix Electronics and suitable for industrial memory controllers, embedded computing modules, and high-reliability data acquisition systems requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74ACT11139PWR 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 founded in 1930, specializing in analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.

The 74ACT11139PWR belongs to TI's advanced CMOS logic family built on EPIC™ process technology, engineered specifically for high-speed memory decoding and data-routing applications demanding low propagation delay, TTL compatibility, and industrial temperature operation.

FAQ

What is the maximum operating frequency supported by the 74ACT11139PWR?

The 74ACT11139PWR does not specify a maximum clock frequency, as it is a combinational decoder-not a clocked device. Its usable toggle rate is determined by propagation delay: with tPHL/tPLH ≤ 8.5 ns, it supports reliable address decode in systems with bus cycle times ≥ 17 ns (i.e., ≤ 59 MHz sustained toggle rate under worst-case conditions). Real-world memory systems typically operate well within this margin due to setup/hold timing constraints.

Can the 74ACT11139PWR drive standard TTL loads directly?

Yes, the 74ACT11139PWR can drive standard TTL loads directly. Its guaranteed output drive (IOH = −24 mA, IOL = 24 mA at VCC = 4.5 V) exceeds the input requirements of 74LS and 74F families (IIH = 20 µA, IIL = −0.4 mA per input). One 74ACT11139PWR output can reliably drive up to 10 LSTTL inputs without external buffering, thanks to its ACT-series CMOS output stage.

Is the 74ACT11139PWR pin-compatible with the 74ACT139?

Yes, the 74ACT11139PWR is functionally and pin-compatible with the 74ACT139 in TSSOP-16 (PW) and SOIC-16 (D) packages. Both share identical pin assignments, logic function, electrical specifications, and timing characteristics. The "11139" designation reflects TI's internal part numbering convention for the same silicon die used in the 74ACT139 series - confirmed by TI's packaging addendum and functional equivalence tables.

Does the 74ACT11139PWR require external pull-up resistors on its outputs?

No, the 74ACT11139PWR does not require external pull-up resistors on its outputs. It features totem-pole CMOS outputs capable of actively driving both high (VOH ≥ 3.94 V at VCC = 4.5 V) and low (VOL ≤ 0.44 V at IOL = 24 mA). Pull-ups are unnecessary unless interfacing with open-collector systems - which is not the intended use case for this device.

What is the significance of center-pin VCC and GND in the 74ACT11139PWR package?

The center-pin VCC (Pin 13) and GND (Pin 4) configuration in the 74ACT11139PWR's TSSOP-16 package minimizes high-speed switching noise by providing symmetrical current return paths and reducing ground bounce. This layout lowers inductance in the power distribution network, improving signal integrity for sub-10 ns propagation delays - a key design feature for stable operation in dense, high-frequency memory subsystems.

74ACT11139PWR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74ACT

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:: 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-TSSOP

74ACT11139PWR FAQ

1.How can I place an order for 74ACT11139PWR through Aetrix?

Please submit a Request for Quotation (RFQ) for 74ACT11139PWR 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 74ACT11139PWR reliable?

The price and inventory of 74ACT11139PWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ACT11139PWR is usually 5 days.

3.What payment methods are accepted for 74ACT11139PWR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ACT11139PWR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74ACT11139PWR?

74ACT11139PWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74ACT11139PWR 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 74ACT11139PWR?

For technical support, including 74ACT11139PWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ACT11139PWR requirements.

6.How does Aetrix verify that 74ACT11139PWR is sourced from the original manufacturer or authorized distributors?

All 74ACT11139PWR 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 74ACT11139PWR meets industry standards.

7.What is the process for return or replacement of 74ACT11139PWR?

All 74ACT11139PWR units undergo pre-shipment inspection (PSI). If there is an issue with 74ACT11139PWR, 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 74ACT11139PWR part is unused and in its original packaging.

Return procedure for 74ACT11139PWR:

1.Submit a request within 90 days.

2.Obtain a Return Material Authorization (RMA) from Aetrix.

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