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

onsemi 74LVTH16240MEA

Name: 74LVTH16240MEA
Brand: onsemi
SKU: 74LVTH16240MEA
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74LVTH16240MEA

Manufacturer:: onsemi

Category:: Buffers, Drivers, Receivers, Transceivers

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

Datasheet:: 74LVTH16240MEA.pdf

Description:: IC BUFFER INVERT 3.6V 48SSOP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

74LVTH16240MEA 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 TTL-level interfacing in 3.3V systems. It features bushold inputs, 48-pin SSOP packaging, ±32 mA/±64 mA drive capability, and operates from 2.7V to 3.6V.

For engineers reviewing the 74LVTH16240MEA datasheet, pinout, applications, or equivalent options, key selection criteria include bushold input support, nibble-wise 3-STATE control, 3.3V supply compatibility with 5V-tolerant I/O, and SSOP-48 mechanical fit for high-density PCB layouts.

Technical Context

The 74LVTH16240MEA implements sixteen independent inverting buffers grouped into four 4-bit nibbles, each with dedicated active-low Output Enable (OEn) control. This architecture enables flexible partial bus gating without affecting other data lanes.

Its bushold inputs eliminate external pull-ups on unused pins, while BiCMOS fabrication delivers ABT-class speed (tPLH/tPHL ≤ 4.2 ns at 3.3V) with low static current (ICCZ ≤ 0.19 mA) and robust ESD protection (HBM ≥ 2000V).

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage	2.7V–3.6V - Ensures stable operation in standard 3.3V logic domains with margin for rail variation.
Input Voltage Range	0V–5.5V - Supports mixed-voltage interfacing, including direct connection to 5V TTL buses.
Output Drive	−32 mA / +64 mA - Sinks 64 mA at VOL ≤ 0.55 V (IOL = 64 mA), sources 32 mA at VOH ≥ VCC − 0.2 V.
Propagation Delay	≤ 4.2 ns (max, tPLH/tPHL @ CL = 50 pF) - Enables reliable timing in high-speed address/data paths up to ~200 MHz.
Bushold Input Current	≥ 75 µA (II(HOLD) @ VI = 0.8V) - Maintains valid logic state on floating inputs without external biasing.
3-STATE Enable Time	tPZH ≤ 4.9 ns (max) - Minimizes bus contention window during output enable transitions.

Pinout & Package

74LVTH16240MEA is housed in a 48-lead Small Shrink Outline Package (SSOP), JEDEC MO-118, 0.300" wide (Package Number MS48A), with 0.025" pitch and exposed thermal pad not connected internally.

Pin/Terminal	Circuit Role	Design Meaning
OEn (OE1–OE4)	Active-low 3-STATE enable per nibble	Four independent controls allow selective disabling of I0–I3/O0–O3, I4–I7/O4–O7, etc., enabling partial bus isolation.
I0–I15	Inverting data inputs with bushold	Each input retains its last valid logic level when un-driven, eliminating need for external pull-up resistors.
O0–O15	Inverting 3-STATE outputs	Outputs mirror inverted input state when enabled; enter high-impedance (Z) when corresponding OEn is HIGH.
VCC, GND	Power and ground supply pins	Dual VCC/GND pairs (pins 1/24/48 and 2/23/47) reduce switching noise and improve power integrity across 16-bit operation.

Key Features

Feature	Design Value
Bushold inputs	Eliminates external pull-up resistors on all 16 data inputs, reducing BOM count and board space in sparse-bus or hot-swap applications.
Nibble-wise 3-STATE control	Four OE pins (OE1–OE4) enable independent gating of four 4-bit segments-critical for multi-port memory or peripheral arbitration.
5V-tolerant I/O	Accepts 0–5.5V input signals and drives 5V loads while powered from 3.3V, simplifying level translation in mixed-supply systems.
Live insertion/extraction support	Power-up/down high-impedance behavior prevents bus glitches during hot-plug events in modular backplane or carrier-card designs.

Applications

Memory Address Buffering	PCI/ISA Bus Transceiver
Use Scenario: Driving 16-bit address lines from a microcontroller to SRAM or Flash memory with tight timing margins. IC Role / Device Role / Timing Role: Inverting buffer with 3-STATE outputs isolates memory address bus during DMA cycles or peripheral access. Use Value: Bushold inputs prevent floating address states during reset; 4.2 ns max propagation delay supports >200 MHz address setup timing.	Use Scenario: Interfacing a 3.3V CPU to legacy 5V PCI or ISA expansion slots requiring bidirectional data buffering. IC Role / Device Role / Timing Role: Level-translating line driver/receiver with 5V-tolerant inputs and strong 64 mA sink capability for legacy bus termination. Use Value: Eliminates discrete level shifters; 32 mA source/64 mA sink meets PCI electrical loading requirements without external drivers.
Programmable Logic Clock Distribution	Industrial I/O Expansion
Use Scenario: Distributing inverted clock or strobe signals from an FPGA to multiple synchronous peripherals with matched skew. IC Role / Device Role / Timing Role: Low-skew (tOSHL/tOSLH ≤ 1.0 ns) inverting buffer ensuring simultaneous edge delivery across 16 outputs. Use Value: Tight skew control maintains setup/hold timing across fanout; SSOP-48 footprint allows dense clock tree routing.	Use Scenario: Expanding GPIO count on an industrial PLC controller by buffering digital input/output signals to field sensors and actuators. IC Role / Device Role / Timing Role: Robust interface IC with latch-up immunity (>500 mA) and HBM ESD rating ≥ 2000V for noisy factory environments. Use Value: Bushold holds safe default state on open inputs; 3-STATE enables dynamic reconfiguration of I/O direction without hardware changes.

Memory Address Buffering

PCI/ISA Bus Transceiver

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

IC Role / Device Role / Timing Role: Inverting buffer with 3-STATE outputs isolates memory address bus during DMA cycles or peripheral access.

Use Value: Bushold inputs prevent floating address states during reset; 4.2 ns max propagation delay supports >200 MHz address setup timing.

Use Scenario: Interfacing a 3.3V CPU to legacy 5V PCI or ISA expansion slots requiring bidirectional data buffering.

IC Role / Device Role / Timing Role: Level-translating line driver/receiver with 5V-tolerant inputs and strong 64 mA sink capability for legacy bus termination.

Use Value: Eliminates discrete level shifters; 32 mA source/64 mA sink meets PCI electrical loading requirements without external drivers.

Programmable Logic Clock Distribution

Industrial I/O Expansion

Use Scenario: Distributing inverted clock or strobe signals from an FPGA to multiple synchronous peripherals with matched skew.

IC Role / Device Role / Timing Role: Low-skew (tOSHL/tOSLH ≤ 1.0 ns) inverting buffer ensuring simultaneous edge delivery across 16 outputs.

Use Value: Tight skew control maintains setup/hold timing across fanout; SSOP-48 footprint allows dense clock tree routing.

Use Scenario: Expanding GPIO count on an industrial PLC controller by buffering digital input/output signals to field sensors and actuators.

IC Role / Device Role / Timing Role: Robust interface IC with latch-up immunity (>500 mA) and HBM ESD rating ≥ 2000V for noisy factory environments.

Use Value: Bushold holds safe default state on open inputs; 3-STATE enables dynamic reconfiguration of I/O direction without hardware changes.

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
SN74LVC16240ADGGR	No bushold; CMOS-only process; lower drive (24 mA sink); 1.65–3.6V supply range.	Lacks bus hold, requiring external pull-ups on unused inputs; better suited for ultra-low-power, single-supply 1.8V/3.3V systems.	Select when bushold is unnecessary and lower ICCZ (< 10 µA) is prioritized over drive strength.
74ALVCH16240QFG	Higher speed (tPD ≤ 3.2 ns); 1.65–3.6V supply; no bushold; different pinout (TSSOP-48).	Superior timing margin but requires PCB redesign due to non-pin-compatible layout; lacks bushold for floating-input resilience.	Choose only if timing-critical designs demand sub-3.5 ns delay and layout revision is feasible.

Compared with SN74LVC16240ADGGR and 74ALVCH16240QFG, the 74LVTH16240MEA uniquely combines bushold functionality, 5V-tolerant I/O, and SSOP-48 compatibility-making it optimal for legacy bus interfacing and hot-swap-capable industrial backplanes where input state retention and mixed-voltage robustness are mandatory.

Availability

74LVTH16240MEA is available at Aetrix Electronics and suitable for memory subsystems, industrial I/O expansion, PCI/ISA bridge interfaces, and programmable logic clock distribution requiring stable component supply and long-term lifecycle support.

Supply support for 74LVTH16240MEA 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 power IC manufacturer, acquired by ON Semiconductor in 2016; its legacy logic portfolio remains widely deployed in industrial and computing infrastructure.

The 74LVTH16240MEA belongs to Fairchild's LVT/LVTH family of low-voltage BiCMOS bus interface devices, engineered specifically for high-speed, low-noise 3.3V-to-5V bridging in memory, address, and clock distribution applications.

FAQ

What is the function of the bushold feature in the 74LVTH16240MEA?

The bushold feature in the 74LVTH16240MEA actively retains the last valid logic state on each input (I0–I15) when left un-driven, eliminating the need for external pull-up or pull-down resistors. This reduces component count and improves reliability in systems with sparse bus usage or hot-swap scenarios. The 74LVTH16240MEA specifies II(HOLD) ≥ 75 µA at VI = 0.8V, ensuring robust state retention under typical noise margins.

Does the 74LVTH16240MEA support live insertion and extraction?

Yes, the 74LVTH16240MEA supports live insertion and extraction due to its power-up/power-down high-impedance behavior. During power transitions, all outputs remain in 3-STATE (high impedance), preventing bus contention or signal corruption. This feature is explicitly documented in the datasheet and makes the 74LVTH16240MEA suitable for modular backplane and carrier-card applications where cards are inserted or removed while the system is powered.

What are the absolute maximum ratings for VCC and input voltage on the 74LVTH16240MEA?

The 74LVTH16240MEA has an absolute maximum VCC rating of 0.5V to 4.6V and an absolute maximum DC input voltage (VI) of 0.5V to 7.0V. These limits ensure safe operation during transient conditions. Note that recommended operating VCC is 2.7V–3.6V, and recommended VI is 0V–5.5V - meaning the 74LVTH16240MEA safely interfaces with 5V logic while powered from 3.3V, but must not exceed 4.6V on VCC or 7.0V on any input pin.

How many independent 3-STATE control inputs does the 74LVTH16240MEA have?

The 74LVTH16240MEA has four independent active-low 3-STATE control inputs: OE1, OE2, OE3, and OE4. Each controls a 4-bit nibble (I0–I3/O0–O3, I4–I7/O4–O7, etc.), enabling granular bus segmentation. These can be tied together for full 16-bit operation, but their independence allows selective gating - a key advantage of the 74LVTH16240MEA over simpler 8-bit or unified-enable buffers.

Is the 74LVTH16240MEA pin-compatible with the 74LVT16240MEA?

Yes, the 74LVTH16240MEA is pin-compatible with the 74LVT16240MEA - both use identical MS48A SSOP-48 packaging and share the same pinout, including OEn, I0–I15, and O0–O15 assignments. The primary functional difference is bushold: the 74LVTH16240MEA includes it; the 74LVT16240MEA does not. Therefore, the 74LVTH16240MEA can serve as a drop-in upgrade where input state retention is required, without PCB modification.

74LVTH16240MEA Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: 74LVTH

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

74LVTH16240MEA FAQ

1.How can I place an order for 74LVTH16240MEA through Aetrix?

Please submit a Request for Quotation (RFQ) for 74LVTH16240MEA 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 74LVTH16240MEA reliable?

The price and inventory of 74LVTH16240MEA are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVTH16240MEA is usually 5 days.

3.What payment methods are accepted for 74LVTH16240MEA?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVTH16240MEA transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74LVTH16240MEA?

74LVTH16240MEA orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74LVTH16240MEA 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 74LVTH16240MEA?

For technical support, including 74LVTH16240MEA datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVTH16240MEA requirements.

6.How does Aetrix verify that 74LVTH16240MEA is sourced from the original manufacturer or authorized distributors?

All 74LVTH16240MEA 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 74LVTH16240MEA meets industry standards.

7.What is the process for return or replacement of 74LVTH16240MEA?

All 74LVTH16240MEA units undergo pre-shipment inspection (PSI). If there is an issue with 74LVTH16240MEA, 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 74LVTH16240MEA part is unused and in its original packaging.

Return procedure for 74LVTH16240MEA:

1.Submit a request within 90 days.

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

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