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Home > Products > Integrated Circuits (ICs) > Logic > Buffers, Drivers, Receivers, Transceivers

onsemi 74ACTQ16240MTDX

Name: 74ACTQ16240MTDX
Brand: onsemi
SKU: 74ACTQ16240MTDX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74ACTQ16240MTDX

Manufacturer:: onsemi

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 48-TFSOP (0.240", 6.10mm Width)

Datasheet:: 74ACTQ16240MTDX.pdf

Description:: IC BUFF INVERT 5.5V 48TSSOP

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Product details

Overview

74ACTQ16240MTDX from Fairchild Semiconductor is a 16-bit inverting buffer/line driver with independent nibble-level 3-STATE control, designed for memory/address bus driving and clock distribution. It delivers ±24 mA output drive, guarantees pin-to-pin output skew ≤4.3 ns, operates across −40°C to +85°C, and features Quiet Series™ technology for controlled dynamic noise under simultaneous switching.

For engineers reviewing the 74ACTQ16240MTDX datasheet, pinout, applications, or equivalent options, key selection criteria include guaranteed simultaneous switching noise performance, 50 pF / 250 pF load compatibility, nibble-selectable 3-STATE enable, and TSSOP-48 package suitability for high-density PCB layouts.

Technical Context

The 74ACTQ16240MTDX implements four independent 4-bit inverting buffers, each with dedicated active-low Output Enable (OEn) inputs-OE1 through OE4-enabling selective 4-bit, 8-bit, or full 16-bit operation. Its GTO™ output control architecture ensures deterministic switching behavior and minimizes ground bounce during multi-output transitions.

It operates strictly within 4.5 V to 5.5 V VCC, supports input edge rates ≥125 mV/ns, and meets AC timing specs for both 50 pF (e.g., tPLH = 2.7–7.8 ns) and 250 pF loads (e.g., tPLH = 4.0–13.8 ns), with propagation delay skew bounded at 4.3 ns across all outputs.

Key Specifications

Parameter	Value and Actual Design Meaning
VCC Range	4.5 V to 5.5 V - Ensures compatibility with standard 5 V TTL/CMOS systems and tolerance against rail droop.
Output Drive	±24 mA - Sufficient to directly drive 50 Ω transmission lines or multiple TTL inputs without external buffering.
Propagation Skew	≤4.3 ns - Guarantees tight timing alignment across all 16 outputs, critical for synchronous bus applications.
Simultaneous Switching Noise	Guaranteed VOLP ≤ 0.8 V, VOHP ≤ VOH + 1.5 V - Enables reliable operation in noise-sensitive digital systems with dense parallel buses.
Input Thresholds	VIH = 2.0 V, VIL = 0.8 V - Fully compatible with TTL logic levels and robust against noise on address/data lines.
Operating Temp	−40°C to +85°C - Qualified for industrial-grade embedded and computing environments.
Package	TSSOP-48 (MTD48, JEDEC MO-153, 6.1 mm wide) - Surface-mount footprint optimized for automated assembly and thermal management.

Pinout & Package

74ACTQ16240MTDX is housed in a 48-pin Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153 compliant, 6.1 mm body width, with 0.5 mm lead pitch. Pin assignment follows standard nibble grouping: I0–I3/O0–O3 (OE1), I4–I7/O4–O7 (OE2), I8–I11/O8–O11 (OE3), I12–I15/O12–O15 (OE4), plus VCC and GND distributed across the perimeter for low-inductance power delivery.

Pin/Terminal	Circuit Role	Design Meaning
OEn (n=1–4)	Active-Low Output Enable	Independent nibble gating: OE1 controls O0–O3; OE2 controls O4–O7; etc. Enables partial bus isolation without full device disable.
I0–I15	Buffer Inputs	Inverting logic inputs: HIGH input yields LOW output; LOW input yields HIGH output. No internal latching.
O0–O15	3-STATE Outputs	Driven HIGH/LOW when corresponding OEn = LOW; high-impedance when OEn = HIGH - enables bidirectional bus sharing.
VCC, GND	Power Supply	Dual VCC/GND pairs (pins 24/25 and 47/48) minimize supply impedance and reduce switching noise coupling.

Key Features

Feature	Design Value
Nibble-Controlled 3-STATE	Four independent OE inputs allow granular bus segmentation-e.g., isolate upper/lower memory banks without disabling entire data path.
Quiet Series™ Technology	Reduces simultaneous switching noise (SSN) by controlling output slew rate and grounding transients, verified per FACT noise test methodology.
GTO™ Output Control	Guarantees monotonic output transitions and eliminates false triggering caused by supply rail collapse during heavy switching.
Load-Tested Timing	AC specs validated at both 50 pF (standard logic loading) and 250 pF (heavy capacitive bus), ensuring predictability across real-world interconnect conditions.
Dynamic Input Thresholds	VIHD ≥ 1.7 V and VILD ≤ 1.2 V under fast-edge conditions-ensures noise immunity during high-speed signal routing on multilayer boards.

Applications

Memory Address Buffering	Parallel Bus Transceiver Interface
Use Scenario: Driving 16-bit address lines from a microcontroller to SRAM or EPROM with minimal propagation skew and no bus contention. IC Role / Device Role / Timing Role: Inverting buffer with per-nibble 3-STATE control acts as unidirectional address latch driver, enabling clean address setup before memory access strobe. Use Value: Guaranteed ≤4.3 ns output skew ensures all address bits settle synchronously, eliminating timing margin loss in high-speed memory cycles.	Use Scenario: Isolating two 16-bit data buses (e.g., CPU ↔ peripheral) using back-to-back 74ACTQ16240MTDX devices with complementary OE control. IC Role / Device Role / Timing Role: Bidirectional line driver/receiver where one device drives while the other is in high-Z-enabled via coordinated OE signals. Use Value: ±24 mA drive strength supports direct connection to 50 Ω traces or up to 10 TTL loads, eliminating need for additional bus buffers.
Clock Distribution Network	Industrial I/O Expansion Module
Use Scenario: Distributing a system clock to multiple synchronous peripherals (e.g., ADCs, DACs, FPGAs) requiring matched edge timing and low jitter injection. IC Role / Device Role / Timing Role: Inverting clock buffer with quiet switching behavior-used in non-inverting configuration via double inversion or paired with inverting receivers. Use Value: Quiet Series™ and GTO™ design suppresses VCC droop and ground bounce, preserving clock edge integrity across 16 fanout paths.	Use Scenario: Expanding GPIO count on PLC or motion controller by interfacing microcontroller port pins to industrial sensors/actuators over long cables. IC Role / Device Role / Timing Role: Robust line driver translating MCU logic levels to noise-immune bus signaling, with nibble control enabling per-channel enable/disable. Use Value: Specified operation down to −40°C and up to +85°C, plus 250 pF load capability, ensures reliability in electrically noisy factory-floor environments.

Memory Address Buffering

Parallel Bus Transceiver Interface

Use Scenario: Driving 16-bit address lines from a microcontroller to SRAM or EPROM with minimal propagation skew and no bus contention.

IC Role / Device Role / Timing Role: Inverting buffer with per-nibble 3-STATE control acts as unidirectional address latch driver, enabling clean address setup before memory access strobe.

Use Value: Guaranteed ≤4.3 ns output skew ensures all address bits settle synchronously, eliminating timing margin loss in high-speed memory cycles.

Use Scenario: Isolating two 16-bit data buses (e.g., CPU ↔ peripheral) using back-to-back 74ACTQ16240MTDX devices with complementary OE control.

IC Role / Device Role / Timing Role: Bidirectional line driver/receiver where one device drives while the other is in high-Z-enabled via coordinated OE signals.

Use Value: ±24 mA drive strength supports direct connection to 50 Ω traces or up to 10 TTL loads, eliminating need for additional bus buffers.

Clock Distribution Network

Industrial I/O Expansion Module

Use Scenario: Distributing a system clock to multiple synchronous peripherals (e.g., ADCs, DACs, FPGAs) requiring matched edge timing and low jitter injection.

IC Role / Device Role / Timing Role: Inverting clock buffer with quiet switching behavior-used in non-inverting configuration via double inversion or paired with inverting receivers.

Use Value: Quiet Series™ and GTO™ design suppresses VCC droop and ground bounce, preserving clock edge integrity across 16 fanout paths.

Use Scenario: Expanding GPIO count on PLC or motion controller by interfacing microcontroller port pins to industrial sensors/actuators over long cables.

IC Role / Device Role / Timing Role: Robust line driver translating MCU logic levels to noise-immune bus signaling, with nibble control enabling per-channel enable/disable.

Use Value: Specified operation down to −40°C and up to +85°C, plus 250 pF load capability, ensures reliability in electrically noisy factory-floor environments.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit inverting buffer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74ACT16240DGGR	TI part uses identical 16-bit inverting buffer function and TSSOP-48 package but lacks Quiet Series™ noise suppression and GTO™ output control.	No guaranteed simultaneous switching noise limits; requires external decoupling and layout mitigation for high-fanout buses.	Select when cost sensitivity outweighs SSN requirements and board-level noise control is already implemented.
74LVC16240APAG	ON Semiconductor LVC variant operates at 1.65–3.6 V, not 4.5–5.5 V; lower drive (±24 mA only at 3.3 V), no specified 250 pF timing or skew guarantees.	Not suitable for legacy 5 V systems; requires level-shifting if interfacing with ACT/TTl logic families.	Select only for new 3.3 V designs where voltage scaling and lower power are prioritized over 5 V interoperability.

Compared with SN74ACT16240DGGR and 74LVC16240APAG, the 74ACTQ16240MTDX uniquely combines 5 V operation, guaranteed SSN performance, and nibble-level 3-STATE control-making it the only option qualified for high-reliability industrial bus drivers where timing determinism and noise immunity are co-constrained.

Availability

74ACTQ16240MTDX is available at Aetrix Electronics and suitable for memory subsystems, parallel bus interfaces, clock distribution networks, and industrial I/O expansion modules requiring stable component supply and long-term industrial temperature support.

Supply support for 74ACTQ16240MTDX 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

Fairchild Semiconductor was a U.S.-based analog and mixed-signal IC manufacturer, acquired by ON Semiconductor in 2016; its legacy ACTQ logic family remains widely deployed in industrial and computing infrastructure.

The ACTQ logic series-including the 74ACTQ16240MTDX-was engineered specifically for high-speed, low-noise 5 V bus interface applications demanding deterministic timing, robust noise immunity, and scalable fanout without signal degradation.

FAQ

What is the operating voltage range for the 74ACTQ16240MTDX?

The 74ACTQ16240MTDX operates over a supply voltage range of 4.5 V to 5.5 V. This range ensures compatibility with standard 5 V TTL and CMOS systems while providing margin against rail droop in high-current switching scenarios. Operation outside this range may compromise timing guarantees, noise performance, or device reliability as specified in the Absolute Maximum Ratings table.

Does the 74ACTQ16240MTDX support simultaneous switching of all 16 outputs?

Yes, the 74ACTQ16240MTDX is explicitly characterized for simultaneous switching of all 16 outputs, with guaranteed noise parameters (VOLP, VOHP, VIHD, VILD) and extended AC timing specs measured under 16-output switching conditions into both 50 pF and 250 pF loads. Its Quiet Series™ and GTO™ technologies ensure stable behavior even under worst-case SSN conditions.

How is nibble control implemented on the 74ACTQ16240MTDX?

The 74ACTQ16240MTDX provides four independent active-low Output Enable inputs-OE1 through OE4-each controlling a 4-bit nibble (O0–O3, O4–O7, O8–O11, O12–O15). This allows selective activation of subsets of outputs without affecting others, enabling flexible bus segmentation, partial memory addressing, or phased enable sequencing in high-density systems.

What package type does the 74ACTQ16240MTDX use, and is it RoHS-compliant?

The 74ACTQ16240MTDX uses a 48-pin Thin Shrink Small Outline Package (TSSOP), designated MTD48 per JEDEC MO-153, with 6.1 mm body width and 0.5 mm lead pitch. As a Fairchild product manufactured prior to 2006, it predates mandatory RoHS enforcement; however, Aetrix Electronics supplies only lead-free, RoHS-compliant re-manufactured or sourced equivalents meeting J-STD-609 Category 1 marking requirements.

Can the 74ACTQ16240MTDX be used as a non-inverting buffer?

No-the 74ACTQ16240MTDX is strictly an inverting buffer: each output is the logical complement of its corresponding input (Ox = NOT Ix). To achieve non-inverting functionality, two stages must be cascaded (e.g., 74ACTQ16240MTDX → 74ACTQ16240MTDX), or a complementary device such as the 74ACTQ16244 (non-inverting version) must be selected instead.

74ACTQ16240MTDX Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: 74ACTQ

Package/Case:: 48-TFSOP (0.240", 6.10mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Logic Type:: Buffer, Inverting

Number of Elements:: 4

Number of Bits per Element:: 4

Input Type:: -

Output Type:: 3-State

Current - Output High, Low:: 24mA, 24mA

Voltage - Supply:: 4.5V ~ 5.5V

Operating Temperature:: -40°C ~ 85°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 48-TSSOP

74ACTQ16240MTDX FAQ

1.How can I place an order for 74ACTQ16240MTDX through Aetrix?

Please submit a Request for Quotation (RFQ) for 74ACTQ16240MTDX 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 74ACTQ16240MTDX reliable?

The price and inventory of 74ACTQ16240MTDX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ACTQ16240MTDX is usually 5 days.

3.What payment methods are accepted for 74ACTQ16240MTDX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ACTQ16240MTDX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74ACTQ16240MTDX?

74ACTQ16240MTDX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74ACTQ16240MTDX 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 74ACTQ16240MTDX?

For technical support, including 74ACTQ16240MTDX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ACTQ16240MTDX requirements.

6.How does Aetrix verify that 74ACTQ16240MTDX is sourced from the original manufacturer or authorized distributors?

All 74ACTQ16240MTDX 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 74ACTQ16240MTDX meets industry standards.

7.What is the process for return or replacement of 74ACTQ16240MTDX?

All 74ACTQ16240MTDX units undergo pre-shipment inspection (PSI). If there is an issue with 74ACTQ16240MTDX, 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 74ACTQ16240MTDX part is unused and in its original packaging.

Return procedure for 74ACTQ16240MTDX:

1.Submit a request within 90 days.

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

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