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

onsemi 74LVT16240MEA

Name: 74LVT16240MEA
Brand: onsemi
SKU: 74LVT16240MEA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74LVT16240MEA

Manufacturer:: onsemi

Category:: Buffers, Drivers, Receivers, Transceivers

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

Datasheet:: 74LVT16240MEA.pdf

Description:: IC BUFFER INVERT 3.6V 48SSOP

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Product details

Overview

74LVT16240MEA from Fairchild Semiconductor is a low-voltage 16-bit inverting buffer/line driver with 3-STATE outputs in a 48-lead SSOP package. It operates at 2.7–3.6 V, delivers ±32 mA/±64 mA output drive, and supports TTL-level interfacing to 5V systems. Designed for memory/address bus driving and clock distribution in industrial embedded systems.

For engineers reviewing the 74LVT16240MEA datasheet, pinout, applications, or equivalent options, key selection criteria include its nibble-controlled 3-STATE architecture, bushold-free input design (vs. LVTH variant), 3.5 ns typical propagation delay, and SSOP-48 JEDEC MO-118 mechanical compatibility.

Technical Context

The 74LVT16240MEA implements four independent 4-bit inverting buffers, each with dedicated active-low Output Enable (OEn) control - enabling flexible 4-, 8-, or 16-bit bus segmentation. Its BiCMOS process delivers ABT-class speed while maintaining 3.3V logic compatibility.

All inputs are standard CMOS-compatible with no bushold circuitry (distinguishing it from 74LVTH16240), and outputs enter high-impedance state on OEn HIGH with glitch-free power-up/down behavior. DC output drive is specified at −32 mA (IOH) and +64 mA (IOL) under 3.3V operation.

Key Specifications

Parameter	Value and Actual Design Meaning
VCC Range	2.7 V to 3.6 V - ensures stable operation across industrial-grade 3.3V supply tolerances
Propagation Delay (tPLH/tPHL)	1.0–4.2 ns - enables high-speed address/data bus buffering up to ~250 MHz toggle rate
Output Drive (IOH/IOL)	−32 mA / +64 mA - drives heavy capacitive loads (e.g., >10 pF traces or multiple TTL inputs)
Input Voltage Range (VI)	0 V to 5.5 V - allows direct interfacing with 5V TTL signal sources without level shifters
Operating Temperature	−40°C to +85°C - qualified for extended industrial ambient environments
3-STATE Enable Time (tPZH)	1.0–4.9 ns - supports fast bus arbitration and dynamic bus sharing
Power Supply Current (ICCZ)	0.19 mA - ultra-low quiescent current when outputs disabled, reducing system standby power

Pinout & Package

Package: 48-Lead Small Shrink Outline Package (SSOP), JEDEC MO-118, 0.300" wide (Package Code: MS48A). Body dimensions: 15.4 mm × 7.5 mm × 2.0 mm (max).

Pin/Terminal	Circuit Role	Design Meaning
OEn1–OEn4	Active-Low Output Enable Inputs	Each controls 4 outputs (O0–O3, O4–O7, etc.); shorting enables full 16-bit operation
I0–I15	Inverting Data Inputs	CMOS-compatible inputs; no bushold - external pull-ups required if left floating
O0–O15	3-STATE Inverting Outputs	Drive capability ±32 mA/±64 mA; high-impedance state entered when corresponding OEn = HIGH
VCC, GND	Power Supply Pins	Two VCC (pins 24, 48) and two GND (pins 25, 1) reduce switching noise and improve PSRR

Key Features

Feature	Design Value
Nibble-Controlled 3-STATE Architecture	Four independent OE inputs allow selective activation of 4-bit segments - critical for partial bus isolation in multi-master systems
TTL-Compatible Input Voltage Range	Accepts 0–5.5 V inputs while powered from 3.3 V - eliminates need for external level translators in mixed-voltage designs
Glitch-Free Power-Up/Down Behavior	Outputs remain high-impedance during VCC ramp-up/down - prevents bus contention during system reset or hot-swap
High-Speed BiCMOS Process	Delivers 3.5 ns typical propagation delay at 3.3 V - matches performance of legacy 5V ABT buffers with lower power
Low ICCZ Quiescent Current	0.19 mA when all outputs disabled - reduces idle power in battery-backed or energy-sensitive applications

Applications

Memory Address Buffering	Clock Distribution Network
Use Scenario: Driving 16-bit address lines from a microcontroller to SRAM or Flash memory in an industrial PLC. IC Role / Device Role / Timing Role: Inverting buffer with 3-STATE control isolates CPU address bus during DMA cycles. Use Value: 4.2 ns max propagation delay ensures setup/hold timing margins at 25 MHz bus clocks; ±64 mA drive handles 15 pF trace + load capacitance.	Use Scenario: Distributing a system clock to multiple synchronous peripherals (ADC, DAC, FPGA config pins) with fanout > 8. IC Role / Device Role / Timing Role: Low-skew inverting line driver providing matched delay across all 16 outputs. Use Value: 1.0 ns max output-to-output skew (tOSLH/tOSHL) maintains <100 ps clock phase error across 16 destinations.
Bus-Oriented Transceiver Interface	Legacy System Voltage Translation
Use Scenario: Bidirectional data bus interface between a 3.3V FPGA and 5V peripheral ASIC using shared data lines. IC Role / Device Role / Timing Role: Direction-controlled inverting transceiver (OE-driven) enabling half-duplex data transfer. Use Value: 5.5 V-tolerant inputs accept 5V logic highs; 3.3V-compatible outputs prevent overvoltage damage to FPGA I/O banks.	Use Scenario: Upgrading a legacy 5V backplane system by inserting 3.3V logic while retaining existing 5V drivers and receivers. IC Role / Device Role / Timing Role: Level-shifting buffer that accepts 5V inputs and drives 3.3V loads without external components. Use Value: Eliminates discrete resistor networks or dedicated level shifters - reduces BOM count and layout area by 3+ components per channel.

Memory Address Buffering

Clock Distribution Network

Use Scenario: Driving 16-bit address lines from a microcontroller to SRAM or Flash memory in an industrial PLC.

IC Role / Device Role / Timing Role: Inverting buffer with 3-STATE control isolates CPU address bus during DMA cycles.

Use Value: 4.2 ns max propagation delay ensures setup/hold timing margins at 25 MHz bus clocks; ±64 mA drive handles 15 pF trace + load capacitance.

Use Scenario: Distributing a system clock to multiple synchronous peripherals (ADC, DAC, FPGA config pins) with fanout > 8.

IC Role / Device Role / Timing Role: Low-skew inverting line driver providing matched delay across all 16 outputs.

Use Value: 1.0 ns max output-to-output skew (tOSLH/tOSHL) maintains <100 ps clock phase error across 16 destinations.

Bus-Oriented Transceiver Interface

Legacy System Voltage Translation

Use Scenario: Bidirectional data bus interface between a 3.3V FPGA and 5V peripheral ASIC using shared data lines.

IC Role / Device Role / Timing Role: Direction-controlled inverting transceiver (OE-driven) enabling half-duplex data transfer.

Use Value: 5.5 V-tolerant inputs accept 5V logic highs; 3.3V-compatible outputs prevent overvoltage damage to FPGA I/O banks.

Use Scenario: Upgrading a legacy 5V backplane system by inserting 3.3V logic while retaining existing 5V drivers and receivers.

IC Role / Device Role / Timing Role: Level-shifting buffer that accepts 5V inputs and drives 3.3V loads without external components.

Use Value: Eliminates discrete resistor networks or dedicated level shifters - reduces BOM count and layout area by 3+ components per channel.

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 data lines	Better suited for systems with partially populated buses or floating inputs during configuration	Select when input stability without external resistors is required; otherwise 74LVT16240MEA offers lower cost and identical timing/power
SN74LVC16240ADGGR	CMOS-only process; lower IOL (24 mA) and higher VOL at full drive; no 5V-tolerant inputs	Requires level translation for 5V signal sources; limited to pure 3.3V systems	Choose only in fully 3.3V domains where lower static power (<1 µA ICC) outweighs drive and voltage-range trade-offs

Compared with 74LVTH16240MEA and SN74LVC16240ADGGR, the 74LVT16240MEA provides optimal balance of 5V-tolerant interfacing, robust output drive, and proven BiCMOS speed-making it preferred for industrial bus buffering where signal integrity and mixed-voltage compatibility are critical.

Availability

74LVT16240MEA is available at Aetrix Electronics and suitable for memory address buffering, clock distribution, and bus-oriented transmitter/receiver applications requiring stable component supply and long-term industrial availability.

Supply support for 74LVT16240MEA 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 designer of high-performance analog and mixed-signal ICs, acquired by ON Semiconductor in 2016; its legacy logic portfolio remains widely deployed in industrial and communications infrastructure.

The 74LVT16240MEA belongs to the LVT (Low-Voltage TTL) family - engineered to replace 5V 74ABT logic in 3.3V systems while preserving timing, drive strength, and system-level interoperability.

FAQ

What is the maximum operating frequency supported by the 74LVT16240MEA?

The 74LVT16240MEA does not specify a maximum clock frequency directly, but its 4.2 ns maximum propagation delay (tPHL/tPLH) and 1.0 ns output skew support reliable operation in systems with data rates up to ~250 MHz for toggling signals. Actual usable frequency depends on load capacitance, termination, and board layout - verified via timing analysis using the device's AC characteristics table at VCC = 3.3 V and TA = 85°C.

Does the 74LVT16240MEA have bushold inputs?

No, the 74LVT16240MEA does not include bushold circuitry on its inputs. Unlike the 74LVTH16240MEA variant, this part requires external pull-up or pull-down resistors on unused inputs to prevent floating states and potential shoot-through current. The datasheet explicitly identifies bushold as exclusive to the LVTH version.

Can the 74LVT16240MEA be used in a 5V system?

The 74LVT16240MEA must be powered from a 2.7–3.6 V supply, but its inputs tolerate up to 5.5 V - enabling safe interfacing with 5V TTL signal sources without level shifters. However, its outputs swing between 0 V and VCC (~3.3 V), so driving native 5V logic loads requires additional translation or compatible 3.3V-tolerant receivers.

What is the pin-compatible alternative to the 74LVT16240MEA with bushold functionality?

The 74LVTH16240MEA is the direct pin-compatible alternative with bushold inputs. It shares identical SSOP-48 packaging (MS48A), pinout, timing, and drive specifications - differing only in internal input circuitry. No PCB changes are required when upgrading from 74LVT16240MEA to 74LVTH16240MEA, though firmware or system design must account for the absence of external pull-ups.

How does the 74LVT16240MEA handle power-up sequencing in multi-rail systems?

The 74LVT16240MEA features inherent power-up/power-down high-impedance behavior: outputs remain in 3-STATE until VCC stabilizes within specification, preventing bus contention during supply ramping. This is confirmed by the "Power Up/Down high impedance" feature in the datasheet and validated by ICCZ and IPU/PD leakage specs - ensuring glitch-free operation even when VCC rises slower than controlling logic rails.

74LVT16240MEA Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: 74LVT

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

Packaging:: Tube

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

74LVT16240MEA FAQ

1.How can I place an order for 74LVT16240MEA through Aetrix?

Please submit a Request for Quotation (RFQ) for 74LVT16240MEA 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 74LVT16240MEA reliable?

The price and inventory of 74LVT16240MEA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVT16240MEA is usually 5 days.

3.What payment methods are accepted for 74LVT16240MEA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVT16240MEA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74LVT16240MEA?

74LVT16240MEA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74LVT16240MEA 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 74LVT16240MEA?

For technical support, including 74LVT16240MEA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVT16240MEA requirements.

6.How does Aetrix verify that 74LVT16240MEA is sourced from the original manufacturer or authorized distributors?

All 74LVT16240MEA 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 74LVT16240MEA meets industry standards.

7.What is the process for return or replacement of 74LVT16240MEA?

All 74LVT16240MEA units undergo pre-shipment inspection (PSI). If there is an issue with 74LVT16240MEA, 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 74LVT16240MEA part is unused and in its original packaging.

Return procedure for 74LVT16240MEA:

1.Submit a request within 90 days.

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

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