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

Texas Instruments SN74ALVCH16240DLR

Name: SN74ALVCH16240DLR
Brand: Texas Instruments
SKU: SN74ALVCH16240DLR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: SN74ALVCH16240DLR

Manufacturer:: Texas Instruments

Category:: Buffers, Drivers, Receivers, Transceivers

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

Datasheet:: SN74ALVCH16240DLR.pdf

Description:: IC BUFFER INVERT 3.6V 48SSOP

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Product details

Overview

SN74ALVCH16240DLR from Texas Instruments is a 16-bit inverting buffer/driver with 3-state outputs, designed for 1.65-V to 3.6-V V_CC operation. It features four independent 4-bit sections, active-low output-enable (OE) inputs, bus-hold circuitry on all data inputs, and operates across –40°C to 85°C. It is used in memory address buffering, clock distribution, and bus interface applications requiring high-density logic isolation.

For engineers reviewing the SN74ALVCH16240DLR datasheet, SN74ALVCH16240DLR pinout, SN74ALVCH16240DLR application, or SN74ALVCH16240DLR equivalent, key selection criteria include V_CC voltage range (1.65–3.6 V), bus-hold input retention, 3-state output timing (t_pd = 3.9 ns at 3.3 V), symmetrical OE control per section, and SSOP-48 package compatibility.

Technical Context

The SN74ALVCH16240DLR implements four independent 4-bit inverting buffers, each with dedicated active-low output-enable (1OE–4OE) controlling its Y outputs. All inputs feature integrated bus-hold circuitry, eliminating external pullup/pulldown resistors for floating inputs.

It uses TI's EPIC™ submicron CMOS process and supports mixed-voltage interfacing across its 1.65–3.6-V operating range. Output drive strength scales with V_CC: ±24 mA at 3.0 V, ±12 mA at 2.7 V, and ±4 mA at 1.65 V, with guaranteed VOH/VOL over full temperature and voltage ranges.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	1.65 V to 3.6 V - enables interoperability between 1.8-V, 2.5-V, and 3.3-V logic domains
Output Drive	±24 mA at V_CC = 3.0 V - sufficient to drive 50-pF loads with fast edge rates in dense PCB layouts
Propagation Delay	t_pd = 3.9 ns (typ) at V_CC = 3.3 V - supports >100-MHz bus toggle rates in synchronous systems
Bus-Hold Current	±75 µA at V_CC = 3.0 V - actively retains valid logic state on unused inputs without external components
Operating Temp	–40°C to +85°C - qualified for industrial-grade embedded control and communications equipment
I/O Capacitance	C_i = 3 pF (control), 6 pF (data); C_o = 7 pF - minimizes capacitive loading on driving sources and transmission lines
ESD Rating	>2000 V HBM, >200 V MM - exceeds MIL-STD-883 requirements for robust board-level handling

Pinout & Package

SN74ALVCH16240DLR is packaged in a 48-pin Shrink Small-Outline Package (SSOP-DL), 300-mil body width, 0.5-mm lead pitch, 1.2-mm max height, JEDEC MO-153 compliant.

Pin/Terminal	Circuit Role	Design Meaning
1OE, 2OE, 3OE, 4OE	Active-low output-enable control	Each independently disables corresponding 4-bit output group into high-impedance state; tied to V_CC via pullup for power-up safety
1A1–1A4, 2A1–2A4, 3A1–3A4, 4A1–4A4	Data inputs	Inverting inputs for respective 4-bit sections; all feature bus-hold to retain last valid logic level when floating
1Y1–1Y4, 2Y1–2Y4, 3Y1–3Y4, 4Y1–4Y4	Inverting buffered outputs	3-state outputs mirroring inverted input logic only when OE is low; high-Z otherwise for bus sharing
V_CC (Pins 7, 21, 34, 45)	Power supply	Four distributed V_CC pins reduce switching noise and improve PSRR across wideband operation
GND (Pins 4, 10, 15, 28, 31, 39)	Ground reference	Six GND pins provide low-inductance return paths for simultaneous output switching and EMI control

Key Features

Feature	Design Value
Bus-hold inputs	Eliminates need for external pullup/pulldown resistors on all 16 data inputs, reducing BOM count and layout area
Wide V_CC range	1.65–3.6 V operation enables direct interface between 1.8-V microcontrollers and 3.3-V peripherals without level shifters
Sectioned OE control	Four independent OE inputs allow selective 4-bit bus gating - critical for partial-width memory or peripheral addressing
EPIC™ process technology	Submicron CMOS delivers low dynamic power (C_pd = 16 pF at 1.8 V) and high noise immunity in industrial environments
Thermal performance	θ_JA = 94°C/W (DL package) supports sustained 16-bit switching in compact enclosures without forced air

Applications

Memory Address Buffering	Industrial Bus Interface
Use Scenario: Driving 16-bit address lines from an FPGA or microcontroller to multiple SRAM or Flash devices on a shared bus. IC Role / Device Role / Timing Role: Inverting 3-state buffer isolating address driver from memory chips; OE synchronized with chip-select to prevent bus contention. Use Value: Bus-hold maintains stable address during OE assertion/deassertion; t_pd ≤ 5.3 ns ensures setup/hold compliance at 50-MHz bus clocks.	Use Scenario: Level-shifting and isolating control signals between 1.8-V sensor hub MCU and 3.3-V I/O expander or ADC. IC Role / Device Role / Timing Role: Voltage-tolerant bidirectional buffer enabling mixed-supply communication without discrete level translators. Use Value: Guaranteed VOH ≥ 2.0 V and VOL ≤ 0.4 V at V_CC = 2.7 V ensure noise margins >0.7 V across temperature.
Clock Distribution Network	PLC Digital I/O Module
Use Scenario: Fan-out of a single system clock to multiple synchronous peripherals (e.g., UARTs, timers, PWM modules). IC Role / Device Role / Timing Role: Low-skew inverting driver providing matched propagation delay across all 16 outputs for deterministic timing alignment. Use Value: t_pd variation < 0.5 ns between outputs (per datasheet test conditions) minimizes clock skew in multi-device synchronization.	Use Scenario: Isolating field-side digital inputs (24 V dry contact) from 3.3-V PLC controller logic using optocoupler interfaces. IC Role / Device Role / Timing Role: Input conditioning buffer with bus-hold retaining last known state during signal dropout or maintenance disconnect. Use Value: ±75 µA bus-hold current sustains valid logic level for >100 ms after input float, preventing spurious interrupts during transient faults.

Memory Address Buffering

Industrial Bus Interface

Use Scenario: Driving 16-bit address lines from an FPGA or microcontroller to multiple SRAM or Flash devices on a shared bus.

IC Role / Device Role / Timing Role: Inverting 3-state buffer isolating address driver from memory chips; OE synchronized with chip-select to prevent bus contention.

Use Value: Bus-hold maintains stable address during OE assertion/deassertion; t_pd ≤ 5.3 ns ensures setup/hold compliance at 50-MHz bus clocks.

Use Scenario: Level-shifting and isolating control signals between 1.8-V sensor hub MCU and 3.3-V I/O expander or ADC.

IC Role / Device Role / Timing Role: Voltage-tolerant bidirectional buffer enabling mixed-supply communication without discrete level translators.

Use Value: Guaranteed VOH ≥ 2.0 V and VOL ≤ 0.4 V at V_CC = 2.7 V ensure noise margins >0.7 V across temperature.

Clock Distribution Network

PLC Digital I/O Module

Use Scenario: Fan-out of a single system clock to multiple synchronous peripherals (e.g., UARTs, timers, PWM modules).

IC Role / Device Role / Timing Role: Low-skew inverting driver providing matched propagation delay across all 16 outputs for deterministic timing alignment.

Use Value: t_pd variation < 0.5 ns between outputs (per datasheet test conditions) minimizes clock skew in multi-device synchronization.

Use Scenario: Isolating field-side digital inputs (24 V dry contact) from 3.3-V PLC controller logic using optocoupler interfaces.

IC Role / Device Role / Timing Role: Input conditioning buffer with bus-hold retaining last known state during signal dropout or maintenance disconnect.

Use Value: ±75 µA bus-hold current sustains valid logic level for >100 ms after input float, preventing spurious interrupts during transient faults.

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
SN74LVC16240ADLR	Lower drive (±24 mA at 3.3 V only); no bus-hold; 1.65–3.6-V V_CC; same pinout	Requires external pullups for unused inputs; less suitable for hot-plug or intermittent signal environments	Select when cost sensitivity outweighs bus-hold requirement and layout allows discrete resistors
74ALVCH16244DLR	Non-inverting output polarity; identical V_CC, timing, bus-hold, and package	Used where signal inversion would break protocol timing or logic state assumptions (e.g., handshake lines)	Choose when system logic requires true (non-inverted) buffering without additional gate-level inversion

Compared with SN74LVC16240ADLR, SN74ALVCH16240DLR provides essential bus-hold for robustness in noisy industrial settings; versus 74ALVCH16244DLR, it delivers inverted logic required for address complementing or active-low enable schemes without added gates.

Availability

SN74ALVCH16240DLR is available at Aetrix Electronics and suitable for memory subsystem design, industrial bus interface, and programmable logic controller (PLC) I/O modules requiring stable component supply and long-term manufacturability.

Supply support for SN74ALVCH16240DLR 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 experience in industrial, automotive, and communications markets.

The SN74ALVCH16240DLR belongs to TI's Widebus™ family of high-speed, low-voltage logic ICs engineered for memory address, clock, and bus-oriented applications demanding density, noise immunity, and mixed-voltage interoperability.

FAQ

What is the recommended power-up sequence for SN74ALVCH16240DLR?

TI specifies that OE inputs must be held high (inactive) during power-up to ensure outputs remain in high-impedance state until V_CC stabilizes. A pullup resistor from each OE to V_CC is mandatory; minimum value depends on driver sink capability but typically 4.7 kΩ suffices for most applications. This prevents bus contention before system initialization completes.

Does SN74ALVCH16240DLR support hot-swap operation?

SN74ALVCH16240DLR is not rated for live insertion. Its absolute maximum ratings do not cover powered-backplane scenarios, and bus-hold circuitry may draw excessive current if inputs float during partial power application. For hot-swap systems, use TI's dedicated hot-swap controllers or add series current-limiting resistors and TVS protection externally.

Can SN74ALVCH16240DLR drive a 50-pF load at 100 MHz?

Yes - at V_CC = 3.3 V, SN74ALVCH16240DLR delivers t_pd = 3.9 ns and supports output transitions into 50-pF loads per TI's characterization. However, sustained 100-MHz toggling requires careful attention to ground/power integrity: use all six GND pins, decouple each V_CC pin with 100-nF ceramic capacitors, and minimize trace lengths to avoid resonance.

How does bus-hold functionality behave at V_CC = 1.8 V?

At V_CC = 1.8 V, SN74ALVCH16240DLR's bus-hold current is ±25 µA (per datasheet), sufficient to maintain logic state against typical PCB leakage (<1 µA). The hold threshold is ~0.58 V, ensuring reliable retention of 'L' or 'H' even with slow-rising or noisy inputs common in low-power sensor interfaces.

Is SN74ALVCH16240DLR RoHS-compliant and lead-free?

Yes - SN74ALVCH16240DLR is RoHS-compliant with NIPDAU (nickel-palladium-gold) lead finish, MSL Level-1 rating (unlimited floor life at ≤30°C/60% RH), and peak reflow tolerance up to 260°C. Full compliance documentation, including substance declarations and test reports, is available through TI's Quality & Environmental page.

SN74ALVCH16240DLR Specifications

Product attributes: Attribute value

Manufacturer:: Texas Instruments

Series:: 74ALVCH

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:: 24mA, 24mA

Voltage - Supply:: 1.65V ~ 3.6V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 48-SSOP

SN74ALVCH16240DLR FAQ

1.How can I place an order for SN74ALVCH16240DLR through Aetrix?

Please submit a Request for Quotation (RFQ) for SN74ALVCH16240DLR 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 SN74ALVCH16240DLR reliable?

The price and inventory of SN74ALVCH16240DLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ALVCH16240DLR is usually 5 days.

3.What payment methods are accepted for SN74ALVCH16240DLR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ALVCH16240DLR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for SN74ALVCH16240DLR?

SN74ALVCH16240DLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your SN74ALVCH16240DLR 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 SN74ALVCH16240DLR?

For technical support, including SN74ALVCH16240DLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ALVCH16240DLR requirements.

6.How does Aetrix verify that SN74ALVCH16240DLR is sourced from the original manufacturer or authorized distributors?

All SN74ALVCH16240DLR 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 SN74ALVCH16240DLR meets industry standards.

7.What is the process for return or replacement of SN74ALVCH16240DLR?

All SN74ALVCH16240DLR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ALVCH16240DLR, 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 SN74ALVCH16240DLR part is unused and in its original packaging.

Return procedure for SN74ALVCH16240DLR:

1.Submit a request within 90 days.

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

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