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

onsemi 74LVT16240MEAX

Name: 74LVT16240MEAX
Brand: onsemi
SKU: 74LVT16240MEAX
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74LVT16240MEAX

Manufacturer:: onsemi

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 48-BSSOP (0.295", 7.50mm Width)

Datasheet:: 74LVT16240MEAX.pdf

Description:: IC BUFFER INVERT 3.6V 48SSOP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

74LVT16240MEAX from Fairchild Semiconductor is a low-voltage 16-bit inverting buffer/line driver with 3-STATE outputs, designed for memory and address bus driving, clock distribution, and bidirectional bus interfacing in 3.3V systems with 5V-tolerant I/O. It features nibble-level (4-bit) output enable control, ±32 mA/±64 mA drive capability, and operates across –40°C to +85°C.

For engineers reviewing the 74LVT16240MEAX datasheet, pinout, applications, or equivalent options, key selection considerations include its 48-pin SSOP package, 3.3V supply with 5V input tolerance, 3.5 ns typical propagation delay, and absence of bushold inputs-distinguishing it from the LVTH variant.

Technical Context

The 74LVT16240MEAX implements sixteen independent inverting buffers grouped into four 4-bit nibbles, each controlled by a dedicated active-low Output Enable (OEn) input. Its BiCMOS process enables TTL-compatible speed at 3.3V while maintaining low power dissipation.

All inputs tolerate up to 5.5V regardless of VCC, enabling safe interfacing with 5V logic; outputs drive 32 mA high / 64 mA low into standard loads. Power-up/down high-impedance behavior prevents bus contention during supply transitions.

Key Specifications

Parameter	Value and Actual Design Meaning
VCC Supply Range	2.7 V to 3.6 V - Ensures stable operation in standard 3.3V systems with ±0.3V margin.
Input Voltage Range	0 V to 5.5 V - Supports mixed-voltage interfacing without level shifters.
Output Drive (IOH/IOL)	–32 mA / +64 mA - Sinks double the current it sources, suitable for driving heavy capacitive buses.
Propagation Delay (tPLH/tPHL)	1.0–4.2 ns (max at 2.7V) - Enables high-speed address/data buffering in sub-5 ns timing-critical paths.
Operating Temperature	–40°C to +85°C - Qualified for industrial ambient environments without derating.
3-STATE Leakage (IOZL/IOZH)	±5 µA max - Minimizes bus leakage when outputs are disabled, preserving signal integrity.
Input Capacitance	4 pF - Low loading on upstream drivers, critical for fanout-limited clock or control lines.

Pinout & Package

74LVT16240MEAX is housed in a 48-lead Small Shrink Outline Package (SSOP), JEDEC MO-118 compliant, 0.300" wide, with 0.025" pitch and exposed thermal pad not connected internally.

Pin/Terminal	Circuit Role	Design Meaning
OE1–OE4	Active-low nibble output enables	Four independent controls allow selective 4-bit bus gating without affecting other nibbles.
I0–I15	Inverting data inputs	Accept 0–5.5V logic; no bushold - external pull-ups required for unused inputs.
O0–O15	3-STATE inverting outputs	Drive bidirectional buses; high-impedance state eliminates contention during read/write direction changes.
VCC, GND	Power and ground pins	Dual VCC/GND pairs (pins 1/24/48 and 2/23/47) reduce switching noise and improve PSRR.

Key Features

Feature	Design Value
5V-tolerant inputs	Enables direct connection to legacy 5V logic without external level translators or voltage dividers.
Nibble-selectable 3-STATE control	Supports partial bus isolation-e.g., disable lower byte while keeping upper byte active for interleaved access.
High sink current (64 mA)	Drives multiple TTL loads or long PCB traces with minimal voltage droop at logic LOW.
Glitch-free power sequencing	Outputs remain high-impedance during VCC ramp-up/down, preventing false writes or bus contention at power transition.
Latch-up immunity >500 mA	Meets stringent JEDEC JESD78 requirements, ensuring robustness in noisy industrial environments.

Applications

Memory Address Buffering	PCI/ISA Bus Transceiver Interface
Use Scenario: Driving 16-bit address lines from a microcontroller to SRAM or Flash memory with tight setup/hold timing. IC Role / Device Role / Timing Role: Inverting buffer with low propagation skew ensures synchronized address delivery across all bits. Use Value: 3.5 ns typical tPLH and <1 ns skew maintain address validity margins under 10 ns cycle times.	Use Scenario: Interfacing a 3.3V host controller to legacy 5V PCI or ISA peripheral slots. IC Role / Device Role / Timing Role: Level-shifting line driver with 5V-tolerant inputs and 3.3V-compatible outputs. Use Value: Eliminates need for discrete level shifters while supporting hot-insertion per specification.
Programmable Logic Clock Distribution	Industrial I/O Expansion Module
Use Scenario: Distributing inverted clock signals from a CPLD to multiple synchronous peripherals. IC Role / Device Role / Timing Role: Low-skew inverting driver with matched delays across O0–O15 outputs. Use Value: tOSHL/tOSLH ≤1.0 ns ensures <100 ps inter-output jitter, preserving clock phase alignment.	Use Scenario: Expanding digital I/O on an industrial PLC base unit using isolated 3.3V logic rails. IC Role / Device Role / Timing Role: Bidirectional bus interface with independent nibble enables for modular I/O grouping. Use Value: OE1–OE4 allow dynamic reconfiguration of I/O banks without full bus reset or firmware reload.

Memory Address Buffering

PCI/ISA Bus Transceiver Interface

Use Scenario: Driving 16-bit address lines from a microcontroller to SRAM or Flash memory with tight setup/hold timing.

IC Role / Device Role / Timing Role: Inverting buffer with low propagation skew ensures synchronized address delivery across all bits.

Use Value: 3.5 ns typical tPLH and <1 ns skew maintain address validity margins under 10 ns cycle times.

Use Scenario: Interfacing a 3.3V host controller to legacy 5V PCI or ISA peripheral slots.

IC Role / Device Role / Timing Role: Level-shifting line driver with 5V-tolerant inputs and 3.3V-compatible outputs.

Use Value: Eliminates need for discrete level shifters while supporting hot-insertion per specification.

Programmable Logic Clock Distribution

Industrial I/O Expansion Module

Use Scenario: Distributing inverted clock signals from a CPLD to multiple synchronous peripherals.

IC Role / Device Role / Timing Role: Low-skew inverting driver with matched delays across O0–O15 outputs.

Use Value: tOSHL/tOSLH ≤1.0 ns ensures <100 ps inter-output jitter, preserving clock phase alignment.

Use Scenario: Expanding digital I/O on an industrial PLC base unit using isolated 3.3V logic rails.

IC Role / Device Role / Timing Role: Bidirectional bus interface with independent nibble enables for modular I/O grouping.

Use Value: OE1–OE4 allow dynamic reconfiguration of I/O banks without full bus reset or firmware reload.

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
74LVTH16240MEA	Includes bushold inputs; eliminates need for external pull-ups on unused inputs.	Better suited for systems with floating or intermittently driven inputs (e.g., hot-swap backplanes).	Select 74LVTH16240MEA if input stability without external components is required; otherwise 74LVT16240MEAX offers lower cost and same timing/performance.
SN74LVC16240ADGGR	CMOS-based; lower ICCZ (0.1 µA vs 0.19 mA), but only 3.6V max VCC and no 5V input tolerance.	Restricted to pure 3.3V domains; unsuitable for mixed-voltage interfacing.	Choose SN74LVC16240ADGGR only in fully 3.3V systems where ultra-low static power is prioritized over voltage flexibility.

Compared with 74LVTH16240MEA and SN74LVC16240ADGGR, the 74LVT16240MEAX uniquely balances 5V-tolerant I/O, BiCMOS speed/power trade-off, and cost-effective SSOP packaging-making it optimal for industrial bus drivers where voltage interoperability and deterministic timing outweigh bushold convenience or ultra-low quiescent current.

Availability

74LVT16240MEAX is available at Aetrix Electronics and suitable for memory subsystem design, industrial bus interface development, and programmable logic support requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74LVT16240MEAX 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 leading analog and power IC manufacturer, acquired by ON Semiconductor in 2016; its legacy logic portfolio remains widely deployed in industrial and computing infrastructure.

The 74LVT16240MEAX belongs to Fairchild's LVT (Low-Voltage TTL) family, engineered to deliver ABT-class speed at 3.3V while maintaining backward compatibility with 5V TTL signaling-targeting high-reliability bus and memory interface applications.

FAQ

What is the function of the OE1–OE4 pins on the 74LVT16240MEAX?

The OE1–OE4 pins on the 74LVT16240MEAX are active-low output enable controls, each governing a 4-bit nibble (O0–O3, O4–O7, O8–O11, O12–O15). When asserted LOW, the corresponding outputs drive inverted logic; when HIGH, they enter high-impedance state. This nibble-level control enables partial bus isolation without disabling the entire device.

Does the 74LVT16240MEAX support 5V logic inputs?

Yes, the 74LVT16240MEAX supports input voltages from 0 V to 5.5 V independent of VCC, allowing direct interfacing with 5V TTL or CMOS logic. This 5V tolerance is specified across the full operating temperature range and does not require external clamping or level-shifting circuitry.

How does the 74LVT16240MEAX differ from the 74LVTH16240MEA?

The 74LVT16240MEAX lacks bushold circuitry on its inputs, requiring external pull-up or pull-down resistors for unused inputs, whereas the 74LVTH16240MEA integrates bushold to retain last valid state. All other electrical and timing specifications-including pinout, drive strength, and 5V tolerance-are identical between the two variants.

What is the maximum output current capability of the 74LVT16240MEAX?

The 74LVT16240MEAX delivers –32 mA (source) at VOH and +64 mA (sink) at VOL under recommended operating conditions. These values are guaranteed across the full temperature range and ensure reliable driving of multiple TTL loads or moderate PCB trace capacitance without violating VOH/VOL limits.

Is the 74LVT16240MEAX suitable for hot-plug applications?

Yes, the 74LVT16240MEAX supports live insertion/extraction per its datasheet. Its power-up/down high-impedance feature ensures outputs remain in 3-STATE during supply ramping, preventing bus contention or signal corruption when inserted into an active system-critical for modular backplane designs.

74LVT16240MEAX Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: 74LVT

Package/Case:: 48-BSSOP (0.295", 7.50mm 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:: 32mA, 64mA

Voltage - Supply:: 2.7V ~ 3.6V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 48-SSOP

74LVT16240MEAX FAQ

1.How can I place an order for 74LVT16240MEAX through Aetrix?

Please submit a Request for Quotation (RFQ) for 74LVT16240MEAX 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 74LVT16240MEAX reliable?

The price and inventory of 74LVT16240MEAX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVT16240MEAX is usually 5 days.

3.What payment methods are accepted for 74LVT16240MEAX?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVT16240MEAX transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74LVT16240MEAX?

74LVT16240MEAX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74LVT16240MEAX 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 74LVT16240MEAX?

For technical support, including 74LVT16240MEAX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVT16240MEAX requirements.

6.How does Aetrix verify that 74LVT16240MEAX is sourced from the original manufacturer or authorized distributors?

All 74LVT16240MEAX 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 74LVT16240MEAX meets industry standards.

7.What is the process for return or replacement of 74LVT16240MEAX?

All 74LVT16240MEAX units undergo pre-shipment inspection (PSI). If there is an issue with 74LVT16240MEAX, 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 74LVT16240MEAX part is unused and in its original packaging.

Return procedure for 74LVT16240MEAX:

1.Submit a request within 90 days.

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

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