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

Texas Instruments SN74ALVTH16240DL

Name: SN74ALVTH16240DL
Brand: Texas Instruments
SKU: SN74ALVTH16240DL
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74ALVTH16240DL

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

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

Datasheet:: SN74ALVTH16240DL.pdf

Description:: IC BUFFER INVERT 3.6V 48SSOP

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Product details

Overview

SN74ALVTH16240DL from Texas Instruments is a 16-bit inverting buffer/driver with 3-state outputs, designed for 2.5-V or 3.3-V V_CC operation while supporting 5-V TTL-level inputs and outputs. It delivers ±24 mA/±32 mA drive at 3.3 V, features bus-hold circuitry to eliminate external pull resistors, and enables live insertion via power-off output disable. It is used in memory address buffering, clock distribution, and bus-transceiver applications in industrial embedded systems.

For engineers reviewing the SN74ALVTH16240DL datasheet, SN74ALVTH16240DL pinout, SN74ALVTH16240DL application, or SN74ALVTH16240DL equivalent, key selection criteria include its mixed-mode 5-V/3.3-V/2.5-V interface capability, Auto3-State behavior above V_CC + 0.5 V, high-impedance state during power-up/down, and flow-through pin architecture for PCB layout optimization.

Technical Context

This device implements four independent 4-bit inverting buffers, each with active-low 3-state enable (OE) inputs and symmetrical output drive. Its Advanced BiCMOS Technology (ABT) delivers low static power dissipation and high-speed switching - propagation delays as low as 1 ns (t_PLH/t_PHL) at 3.3 V with 50-pF load.

The integrated bus-hold circuitry actively maintains valid logic levels on unused data inputs without external components, and Auto3-State automatically disables outputs when output voltage exceeds V_CC + 0.5 V - preventing bus contention in hot-swap scenarios. Distributed V_CC/GND pins minimize high-speed switching noise.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	2.3 V to 3.6 V - supports dual-voltage system interfacing between 2.5-V/3.3-V logic domains and legacy 5-V TTL buses.
Output Drive	–32 mA / +64 mA at 3.3 V - sufficient to drive heavy capacitive loads or multiple CMOS/TTL inputs without signal degradation.
Propagation Delay	1.0 ns (min) to 3.3 ns (max) at 3.3 V, CL = 50 pF - enables high-speed data path timing in memory and bus applications.
Bus-Hold Current	±75 µA at 3 V - sustains stable logic states on floating inputs, eliminating need for external pullup/pulldown resistors.
Power-Up State	High-impedance when V_CC ≤ 1.2 V - prevents bus conflict during power sequencing in multi-rail systems.
ESD Rating	2000 V HBM, 200 V MM, 1000 V CDM - meets industrial-grade robustness requirements for board-level handling and operation.
Operating Temp	–40°C to +85°C - qualified for commercial and industrial temperature environments.

Pinout & Package

SN74ALVTH16240DL uses a 48-pin Plastic Shrink Small-Outline (DL) package - 12.6 mm × 6.2 mm × 1.2 mm max height, 0.5-mm pitch, JEDEC MO-153 compliant.

Pin/Terminal	Circuit Role	Design Meaning
1A1–1A4, 2A1–2A4, 3A1–3A4, 4A1–4A4 (Pins 47,46,44,43,41,40,38,37,36,35,33,32,30,29,27,26)	Data Inputs (Grouped as four 4-bit banks)	Accept TTL/CMOS logic signals; bus-hold circuitry maintains state if left floating.
1Y1–1Y4, 2Y1–2Y4, 3Y1–3Y4, 4Y1–4Y4 (Pins 2,3,5,6,8,9,11,12,13,14,16,17,19,20,22,23)	Inverting 3-State Outputs	Drive external loads with polarity inversion; enter high-Z when corresponding OE is high.
1OE–4OE (Pins 1,24,25,48)	Active-Low Output Enables	Independently control 4-bit output groups; low = enabled, high = high-impedance.
V_CC (Pins 7,21,34,45)	Supply Voltage	Distributed power pins reduce simultaneous switching noise and improve PDN stability.
GND (Pins 4,10,15,18,28,31,39,42)	Ground Reference	Eight dedicated ground pins provide low-inductance return paths for high-speed switching currents.

Key Features

Feature	Design Value
Mixed-Mode Signal Operation	Accepts 5-V inputs and drives 5-V outputs while powered from 2.3–3.6 V - eliminates level shifters in 3.3-V-to-5-V interconnects.
Auto3-State Protection	Automatically places outputs in high-impedance when VO > V_CC + 0.5 V - prevents back-driving and latch-up during hot-swap or fault conditions.
Live Insertion Support	Outputs disabled when V_CC = 0 V - allows safe insertion/removal of daughter cards or modules into powered backplanes.
Flow-Through Pin Architecture	Input and output pins arranged on opposite sides of package - simplifies layer routing and reduces trace crossovers on dense PCBs.
Distributed Power/Ground	Four V_CC and eight GND pins interleaved across package - lowers impedance of power delivery network and suppresses ground bounce.

Applications

Memory Address Buffering	Clock Distribution
Use Scenario: Driving address lines from a 3.3-V microcontroller to multiple 5-V SRAM or Flash devices on a shared bus. IC Role / Device Role / Timing Role: Inverting 3-state buffer providing level translation, fanout amplification, and bus isolation during chip select transitions. Use Value: Eliminates need for discrete level shifters and pull resistors while maintaining <3.3 ns propagation delay for tight timing budgets.	Use Scenario: Distributing a single system clock to multiple 3.3-V peripherals with matched skew and minimal jitter. IC Role / Device Role / Timing Role: Low-skew, high-drive buffer replicating and isolating clock signals across PCB sections. Use Value: ±64 mA drive ensures fast edge rates into 50-pF loads; distributed V_CC/GND minimizes supply-induced jitter.
Hot-Swappable I/O Module	Legacy Bus Interface
Use Scenario: Enabling PCIe or CompactPCI carrier boards to accept field-replaceable I/O modules without powering down the system. IC Role / Device Role / Timing Role: Isolation buffer with Auto3-State and power-off disable protecting backplane signals during insertion/removal. Use Value: Prevents bus contention and back-driving during hot-swap events; high-impedance state guaranteed below 1.2 V V_CC.	Use Scenario: Interfacing modern 3.3-V FPGAs to legacy 5-V ISA or VMEbus peripherals in industrial control systems. IC Role / Device Role / Timing Role: Bidirectional voltage-tolerant buffer enabling seamless communication across voltage domains. Use Value: Supports 5-V input tolerance and 5-V output swing without external components - reduces BOM count and layout area.

Memory Address Buffering

Clock Distribution

Use Scenario: Driving address lines from a 3.3-V microcontroller to multiple 5-V SRAM or Flash devices on a shared bus.

IC Role / Device Role / Timing Role: Inverting 3-state buffer providing level translation, fanout amplification, and bus isolation during chip select transitions.

Use Value: Eliminates need for discrete level shifters and pull resistors while maintaining <3.3 ns propagation delay for tight timing budgets.

Use Scenario: Distributing a single system clock to multiple 3.3-V peripherals with matched skew and minimal jitter.

IC Role / Device Role / Timing Role: Low-skew, high-drive buffer replicating and isolating clock signals across PCB sections.

Use Value: ±64 mA drive ensures fast edge rates into 50-pF loads; distributed V_CC/GND minimizes supply-induced jitter.

Hot-Swappable I/O Module

Legacy Bus Interface

Use Scenario: Enabling PCIe or CompactPCI carrier boards to accept field-replaceable I/O modules without powering down the system.

IC Role / Device Role / Timing Role: Isolation buffer with Auto3-State and power-off disable protecting backplane signals during insertion/removal.

Use Value: Prevents bus contention and back-driving during hot-swap events; high-impedance state guaranteed below 1.2 V V_CC.

Use Scenario: Interfacing modern 3.3-V FPGAs to legacy 5-V ISA or VMEbus peripherals in industrial control systems.

IC Role / Device Role / Timing Role: Bidirectional voltage-tolerant buffer enabling seamless communication across voltage domains.

Use Value: Supports 5-V input tolerance and 5-V output swing without external components - reduces BOM count and layout area.

Equivalent & Alternatives

The following parts are listed as comparable options for similar 16-bit 3-state buffer applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC16244ADGGR	No bus-hold; lower drive (±24 mA at 3.3 V); no Auto3-State; operates only up to 3.6 V V_CC.	Suitable for cost-sensitive, non-hot-swap designs where external pull resistors are acceptable and 5-V tolerance is not required.	Choose when bus-hold and Auto3-State are unnecessary and footprint compatibility with DGG package is prioritized.
SN74ALVCH16244VR	Non-inverting; no bus-hold; higher ICC (5.5 mA typical at 3.3 V); same ABT process and 3.3-V/2.5-V support.	Better suited for unidirectional data paths requiring non-inverted logic, such as address latching or parallel I/O expansion.	Select when signal polarity preservation is critical and bus-hold functionality is handled externally or not needed.

Compared with SN74LVC16244ADGGR and SN74ALVCH16244VR, the SN74ALVTH16240DL uniquely combines inverting logic, integrated bus-hold, Auto3-State, and 5-V tolerant I/O - making it optimal for mixed-voltage, hot-swap, and floating-input environments where reliability and component count reduction are essential.

Availability

SN74ALVTH16240DL is available at Aetrix Electronics and suitable for memory subsystems, clock distribution networks, hot-swappable I/O modules, and legacy bus interface designs requiring stable component supply and long-term industrial availability.

Supply support for SN74ALVTH16240DL 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 specializing in analog, embedded processing, and logic solutions, with decades of expertise in high-reliability interface and bus technologies.

The SN74ALVTH16240DL belongs to TI's Widebus™ ABT logic family, engineered specifically to enhance performance and density in 3-state memory address drivers, clock drivers, and bus-oriented transceivers operating across mixed-voltage systems.

FAQ

What voltage levels can SN74ALVTH16240DL accept on its inputs while operating at 3.3 V V_CC?

The SN74ALVTH16240DL accepts input voltages from 0 V to 5.5 V when V_CC = 3.3 V, enabling direct interfacing with 5-V TTL logic without level-shifting circuitry. This 5-V tolerance is explicitly specified in the recommended operating conditions table for both VIH and VIL thresholds, and confirmed by absolute maximum ratings allowing VI up to 7 V.

Does SN74ALVTH16240DL require external pullup or pulldown resistors on unused inputs?

No. The SN74ALVTH16240DL integrates active bus-hold circuitry on all data inputs, which sources or sinks ±75 µA (at 3 V) to maintain valid logic states on floating inputs. This eliminates the need for external pull resistors, reducing BOM cost and PCB area while improving noise immunity in unterminated bus segments.

How does SN74ALVTH16240DL behave during power-up and power-down sequences?

When V_CC is ≤1.2 V, the SN74ALVTH16240DL automatically enters a high-impedance state on all outputs - regardless of OE pin state - preventing bus conflicts during power sequencing. This behavior is guaranteed per the electrical characteristics table (IOZ(PU/PD) parameter), ensuring safe operation in multi-rail systems.

Can SN74ALVTH16240DL be used in hot-swap applications, and what feature enables this?

Yes. The SN74ALVTH16240DL supports live insertion via two key features: (1) outputs are disabled when V_CC = 0 V, and (2) Auto3-State forces high-impedance when any output exceeds V_CC + 0.5 V. These ensure no back-driving or contention occurs when the device is inserted into a powered backplane or bus.

What is the maximum output current capability of SN74ALVTH16240DL at 3.3 V V_CC?

At V_CC = 3.3 V, the SN74ALVTH16240DL delivers –32 mA (high-level sink) and +64 mA (low-level source) per output, as specified in the recommended operating conditions table under IOL and IOH. This high drive strength supports driving multiple loads or heavy capacitive traces without signal integrity degradation.

SN74ALVTH16240DL Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74ALVTH

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

Packaging:: Bulk

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:: 2.3V ~ 2.7V, 3V ~ 3.6V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 48-SSOP

SN74ALVTH16240DL FAQ

1.How can I place an order for SN74ALVTH16240DL through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74ALVTH16240DL 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 SN74ALVTH16240DL reliable?

The price and inventory of SN74ALVTH16240DL are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALVTH16240DL is usually 5 days.

3.What payment methods are accepted for SN74ALVTH16240DL?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ALVTH16240DL transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN74ALVTH16240DL?

SN74ALVTH16240DL orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74ALVTH16240DL 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 SN74ALVTH16240DL?

For technical support, including SN74ALVTH16240DL datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALVTH16240DL requirements.

6.How does Aetrix verify that SN74ALVTH16240DL is sourced from the original manufacturer or authorized distributors?

All SN74ALVTH16240DL 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 SN74ALVTH16240DL meets industry standards.

7.What is the process for return or replacement of SN74ALVTH16240DL?

All SN74ALVTH16240DL units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALVTH16240DL, 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 SN74ALVTH16240DL part is unused and in its original packaging.

Return procedure for SN74ALVTH16240DL:

1.Submit a request within 90 days.

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

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