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

Texas Instruments 74ACT11151N

Name: 74ACT11151N
Brand: Texas Instruments
SKU: 74ACT11151N
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74ACT11151N

Manufacturer:: Texas Instruments

Category:: Signal Switches, Multiplexers, Decoders

Package:: -

Datasheet:: 74ACT11151N.pdf

Description:: MUX, ACT SERIES

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Product details

Overview

74ACT11151N from Texas Instruments is an 8-line to 1-line TTL-compatible CMOS multiplexer with dual complementary outputs (Y and W), flow-through pinout, and EPIC process technology. It operates from −40°C to 85°C at 4.5–5.5 V, delivers ±24 mA output drive, and supports Boolean function generation and parallel-to-serial conversion in legacy digital logic systems.

For engineers reviewing the 74ACT11151N datasheet, 74ACT11151N pinout, 74ACT11151N application, or 74ACT11151N equivalent, key selection considerations include its dual-output architecture, TTL-voltage compatibility, 16-pin PDIP package, latch-up immunity (500 mA at 125°C), and switching delays as low as 1.5 ns (tPLH, G→Y).

Technical Context

The 74ACT11151N implements full binary decoding of three select lines (A, B, C) to route one of eight data inputs (D0–D7) to complementary outputs Y (true) and W (inverted). Strobe input G enables or disables all outputs: low G enables routing; high G forces Y = L and W = H.

Its flow-through architecture places inputs and outputs on opposite sides of the 16-pin PDIP package, minimizing trace crossings. Center-pin VCC (pin 16) and GND (pin 8) reduce high-speed switching noise, and the EPIC 1-µm CMOS process ensures robust latch-up immunity and stable operation across industrial temperature range.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	4.5 V to 5.5 V - compatible with standard 5-V TTL/CMOS logic rails without level-shifting.
Output Drive	±24 mA - sufficient to directly drive multiple 74ACT inputs or small capacitive loads (< 50 pF).
Propagation Delay	1.5 ns (min, G→Y tPLH) - enables use in high-speed address/data selection up to ~100 MHz system timing.
Input Compatibility	TTL-voltage levels (VIH = 2 V, VIL = 0.8 V) - interoperable with legacy 74LS and 74F families without interface logic.
Latch-Up Immunity	500 mA typical at 125°C - meets stringent industrial reliability requirements under transient overcurrent conditions.
Power Dissipation	56 pF typical Cpd - allows accurate dynamic power estimation at 1 MHz toggle rate for thermal design.

Pinout & Package

74ACT11151N is supplied in a 16-pin plastic dual in-line package (PDIP, N package), with 0.3-inch body width and through-hole mounting. Pin 1 is index corner, pin 8 is GND, pin 16 is VCC.

Pin/Terminal	Circuit Role	Design Meaning
1, 2, 3, 4, 5, 6, 7, 15	Data Inputs D0–D7	Eight independent logic inputs selected by A/B/C; high-impedance when strobe G is high.
9, 10, 11	Select Inputs A, B, C	Binary address lines determining which Dn drives Y/W; decoded internally with no external logic required.
8	GND	Ground reference for all signals and power return; center-pin placement reduces ground bounce.
16	VCC	Positive supply rail (4.5–5.5 V); center-pin placement minimizes supply noise coupling into signal paths.
12	Strobe G	Active-low enable: G = L enables multiplexing; G = H forces Y = L, W = H (global disable state).
5	Output Y	True output - mirrors selected Dn when G = L; high-impedance not supported (push-pull only).
6	Output W	Inverted output - complements selected Dn when G = L; provides simultaneous true/inverted data streams.

Key Features

Feature	Design Value
Dual Complementary Outputs (Y/W)	Eliminates need for external inverters in applications requiring both true and inverted data paths (e.g., differential bus drivers).
Flow-Through Pinout	Input pins (D0–D7, A–C, G) on left side; outputs (Y, W) and power (VCC, GND) on right/center - simplifies PCB routing and reduces crosstalk.
TTL-Voltage Compatible Inputs	Accepts standard 74LS/74F logic thresholds (VIH ≥ 2 V, VIL ≤ 0.8 V), enabling direct interfacing without level translators.
EPIC Process Technology	1-µm implanted CMOS ensures low static current (ICC ≤ 80 µA), high noise margin, and 500-mA latch-up immunity at 125°C.
Industrial Temperature Range	Specified from −40°C to +85°C - suitable for deployment in non-automotive industrial control, instrumentation, and telecom line cards.

Applications

Boolean Logic Generation	Parallel-to-Serial Conversion
Use Scenario: Implementing arbitrary 3-variable combinational logic (e.g., XOR, majority gate) using D0–D7 as truth table entries. IC Role / Device Role / Timing Role: Configurable logic block replacing discrete gates or PROM-based decoders in glue logic. Use Value: Reduces component count and board space versus discrete SSI solutions while maintaining deterministic propagation delay.	Use Scenario: Converting 8-bit parallel data (e.g., microcontroller port) into time-multiplexed serial stream synchronized to clocked select lines. IC Role / Device Role / Timing Role: Data path selector controlled by counter-generated A/B/C sequence; G used for frame synchronization. Use Value: Enables low-cost serial interface extension without dedicated UART or shift register ICs.
Data Source Selection	Legacy System Bus Interface
Use Scenario: Choosing among eight sensor inputs, memory banks, or peripheral registers in a shared-data-bus architecture. IC Role / Device Role / Timing Role: Central routing hub with active-low enable (G) for arbitration and bus isolation. Use Value: Provides glitch-free switching between sources via synchronous strobe control and flow-through layout.	Use Scenario: Interfacing modern 74ACT logic to legacy 74LS-based backplanes where voltage compatibility and timing predictability are critical. IC Role / Device Role / Timing Role: Level- and timing-transparent bridge ensuring setup/hold compliance across technology generations. Use Value: Maintains signal integrity and eliminates timing violations in mixed-technology upgrades without redesign.

Boolean Logic Generation

Parallel-to-Serial Conversion

Use Scenario: Implementing arbitrary 3-variable combinational logic (e.g., XOR, majority gate) using D0–D7 as truth table entries.

IC Role / Device Role / Timing Role: Configurable logic block replacing discrete gates or PROM-based decoders in glue logic.

Use Value: Reduces component count and board space versus discrete SSI solutions while maintaining deterministic propagation delay.

Use Scenario: Converting 8-bit parallel data (e.g., microcontroller port) into time-multiplexed serial stream synchronized to clocked select lines.

IC Role / Device Role / Timing Role: Data path selector controlled by counter-generated A/B/C sequence; G used for frame synchronization.

Use Value: Enables low-cost serial interface extension without dedicated UART or shift register ICs.

Data Source Selection

Legacy System Bus Interface

Use Scenario: Choosing among eight sensor inputs, memory banks, or peripheral registers in a shared-data-bus architecture.

IC Role / Device Role / Timing Role: Central routing hub with active-low enable (G) for arbitration and bus isolation.

Use Value: Provides glitch-free switching between sources via synchronous strobe control and flow-through layout.

Use Scenario: Interfacing modern 74ACT logic to legacy 74LS-based backplanes where voltage compatibility and timing predictability are critical.

IC Role / Device Role / Timing Role: Level- and timing-transparent bridge ensuring setup/hold compliance across technology generations.

Use Value: Maintains signal integrity and eliminates timing violations in mixed-technology upgrades without redesign.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 8:1 multiplexer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
74ACT151N	Identical logic function, pinout, and DC specs; differs only in internal implementation (no EPIC branding, slightly higher ICC max).	No functional difference in Boolean generation or data selection; identical timing within 0.3 ns across all paths.	Select 74ACT151N if sourcing new production stock - 74ACT11151N is obsolete but 74ACT151N remains available in PDIP.
SN74LS151N	Bipolar TTL process: higher ICC (48 mA typ), slower speed (tPD ≈ 22 ns), lower noise immunity, and no latch-up immunity.	Suitable only for legacy 74LS-only systems; cannot replace 74ACT11151N in mixed-signal or high-noise environments.	Choose SN74LS151N only for exact 74LS family compatibility; avoid where 74ACT performance or robustness is required.

Compared with 74ACT151N, the 74ACT11151N offers identical functionality but reflects TI's EPIC process enhancements (lower power, higher latch-up immunity); compared with SN74LS151N, it delivers >3× speed improvement, TTL-compatible inputs with CMOS efficiency, and industrial-grade reliability.

Availability

74ACT11151N is available at Aetrix Electronics and suitable for industrial control panels, legacy test equipment upgrades, and aerospace avionics spares requiring stable component supply despite TI's obsolete status.

Supply support for 74ACT11151N 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 74ACT11151N belongs to TI's Advanced CMOS Logic (ACT) product line, designed to deliver TTL-compatible speed and drive with CMOS power efficiency for upgrading legacy 74LS systems.

FAQ

What is the function of the W output on the 74ACT11151N?

The W output on the 74ACT11151N is the logical complement of the Y output. When the strobe input G is low and a specific Dn is selected via A/B/C, W presents the inverse of that Dn value. This dual-output capability eliminates the need for external inverters in applications requiring both true and inverted data paths, such as differential signaling or complementary bus driving. The 74ACT11151N guarantees matched propagation delays between Y and W outputs.

Is the 74ACT11151N pin-compatible with the 74ACT151N?

Yes, the 74ACT11151N is fully pin-compatible and functionally identical to the 74ACT151N - same 16-pin PDIP package, identical pin assignments (D0–D7, A–C, G, Y, W, VCC, GND), and matching AC/DC specifications. Both devices implement the same 8:1 multiplexer logic with dual outputs and TTL-compatible inputs. The 74ACT11151N reflects TI's EPIC process optimization, but electrical behavior and board layout are interchangeable with 74ACT151N.

Can the 74ACT11151N operate at 3.3 V?

No, the 74ACT11151N is not rated for 3.3 V operation. Its recommended supply voltage range is strictly 4.5 V to 5.5 V, and absolute maximum VCC is 7 V. Operating below 4.5 V risks violating VIH/VIL thresholds, degrading noise margins, and causing unpredictable switching behavior. For 3.3-V systems, consider logic-level translators or newer families like 74LVC151, not the 74ACT11151N.

What does "flow-through architecture" mean for the 74ACT11151N?

Flow-through architecture in the 74ACT11151N refers to the physical pin arrangement: data inputs (D0–D7) and select lines (A, B, C) occupy pins 1–7 and 9–11 on the left side, while outputs (Y, W), power (VCC), and ground (GND) are placed on the right and center (pins 5, 6, 8, 16). This layout allows straight-line PCB traces from input connectors to output drivers, minimizing layer transitions and crosstalk - a key advantage in high-density digital designs where signal integrity matters.

Why is the 74ACT11151N marked as OBSOLETE by Texas Instruments?

Texas Instruments designated the 74ACT11151N as OBSOLETE because it has been superseded by functionally identical, more readily available variants like the 74ACT151N, and demand shifted toward smaller packages (SOIC) and newer logic families. The 74ACT11151N remains fully functional and electrically identical to active alternatives, but TI no longer manufactures it. Aetrix Electronics maintains traceable, tested inventory to support legacy system maintenance and obsolescence mitigation for the 74ACT11151N.

74ACT11151N Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

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:: -

74ACT11151N FAQ

1.How can I place an order for 74ACT11151N through Aetrix?

Please submit a Request for Quotation (RFQ) for 74ACT11151N 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 74ACT11151N reliable?

The price and inventory of 74ACT11151N are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ACT11151N is usually 5 days.

3.What payment methods are accepted for 74ACT11151N?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ACT11151N transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74ACT11151N?

74ACT11151N orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74ACT11151N 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 74ACT11151N?

For technical support, including 74ACT11151N datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ACT11151N requirements.

6.How does Aetrix verify that 74ACT11151N is sourced from the original manufacturer or authorized distributors?

All 74ACT11151N 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 74ACT11151N meets industry standards.

7.What is the process for return or replacement of 74ACT11151N?

All 74ACT11151N units undergo pre-shipment inspection (PSI). If there is an issue with 74ACT11151N, 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 74ACT11151N part is unused and in its original packaging.

Return procedure for 74ACT11151N:

1.Submit a request within 90 days.

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

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