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

onsemi MC74LCX16244DT

Name: MC74LCX16244DT
Brand: onsemi
SKU: MC74LCX16244DT
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: MC74LCX16244DT

Manufacturer:: onsemi

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 48-TFSOP (0.240", 6.10mm Width)

Datasheet:: MC74LCX16244DT.pdf

Description:: IC BUFF TRI-ST 16BIT LV 48TSSOP

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Product details

Overview

MC74LCX16244DT from onsemi is a low-voltage CMOS 16-bit non-inverting buffer with 5 V-tolerant inputs/outputs, 4.5 ns max propagation delay at V_CC = 3.0 V, ±24 mA output drive, and nibble-level 3-state control via four independent OE inputs. It serves as a high-speed bus interface driver in memory address and TTL-level data bus applications.

For engineers reviewing the MC74LCX16244DT datasheet, pinout, applications, or equivalent options, key selection criteria include 1.65–5.5 V supply compatibility, 5.0 V tolerance for mixed-voltage system interfacing, 48-pin TSSOP package constraints, and nibble-selectable 3-state output control for flexible bus segmentation.

Technical Context

The MC74LCX16244DT implements sixteen independent non-inverting buffers grouped into four nibbles (D0–D3/O0–O3, D4–D7/O4–O7, D8–D11/O8–O11, D12–D15/O12–O15), each controlled by a dedicated Output Enable (OE1–OE4) input. Outputs enter high-impedance state when corresponding OE is HIGH.

It supports live insertion and withdrawal via IOFF specification (guaranteed high-impedance when V_CC = 0 V), operates across −55 °C to +125 °C, and features LVTTL/LVCMOS compatibility with 5.5 V absolute maximum input voltage rating - enabling safe interfacing with legacy 5 V logic without level shifters.

Key Specifications

Parameter	Value and Actual Design Meaning
Supply Voltage Range	1.65 V to 5.5 V - enables direct operation in 1.8 V, 2.5 V, 3.3 V, and 5 V systems without external regulators
Max Propagation Delay	4.5 ns @ V_CC = 3.0 V - supports >200 MHz bus timing in high-speed memory and peripheral interfaces
Output Drive Strength	±24 mA @ V_CC = 3.0 V - drives up to 10 LVTTL loads or 20 LVCMOS loads per output
Input Voltage Tolerance	−0.5 V to +6.5 V - allows direct connection to 5 V sources while powered from 1.8 V or 2.5 V rails
IOFF Leakage Current	10 µA max @ V_CC = 0 V - prevents back-driving and signal contention during hot-swap or power-down sequences
Quiescent Supply Current	20 µA typical - minimizes standby power in battery-backed or always-on subsystems
ESD Rating (HBM)	>2000 V - meets industrial-grade robustness requirements without external protection

Pinout & Package

TSSOP-48 (Case 1201), 12.6 mm × 6.2 mm × 1.1 mm profile, Pb-free, RoHS compliant, moisture sensitivity level 1.

Pin/Terminal	Circuit Role	Design Meaning
OE1–OE4	Output Enable Inputs (active LOW)	Each controls 4 outputs (e.g., OE1 enables O0–O3); tying all four enables full 16-bit operation
D0–D15	Buffer Inputs	16 single-ended digital inputs accepting 5 V-tolerant signals; no internal pull-ups/downs
O0–O15	Buffer Outputs	16 non-inverting, 3-state, 5 V-tolerant outputs with balanced ±24 mA sink/source capability
V_CC (Pins 7, 21, 30, 42)	Power Supply	Four dedicated V_CC pins reduce IR drop and improve noise immunity across wide bus widths
GND (Pins 4, 10, 15, 19, 28, 34, 45)	Ground Return	Seven GND pins provide low-inductance return paths for high-frequency switching currents

Key Features

Feature	Design Value
Nibble-Controlled 3-State Architecture	Four independent OE inputs allow selective activation of 4-output groups - ideal for segmented memory banks or multi-peripheral buses
5.0 V-Tolerant I/O	Operates from 1.65 V supply while safely accepting 5 V inputs - eliminates level translators in mixed-voltage designs
Live Insertion Support	IOFF specification ensures outputs remain high-Z during power-up/power-down - prevents bus contention in hot-plug systems
Ultra-Low Static Power	20 µA ICC in all logic states - reduces system-level quiescent current in portable and energy-sensitive applications
Latchup Immunity	>100 mA latchup current rating - exceeds JEDEC JESD78 Class II requirements for robust operation in noisy environments

Applications

Memory Address Driving	TTL-Level Bus Transceiver
Use Scenario: Driving 16-bit address lines from a low-voltage microcontroller to SRAM or Flash memory operating at 5 V. IC Role / Device Role / Timing Role: Non-inverting buffer with 5 V-tolerant outputs acting as voltage-level translator and fanout extender. Use Value: Eliminates need for discrete level shifters; 4.5 ns propagation delay ensures setup/hold timing compliance at 100+ MHz clock rates.	Use Scenario: Isolating and buffering bidirectional data bus segments between 3.3 V FPGA and 5 V legacy peripherals. IC Role / Device Role / Timing Role: Direction-agnostic 16-bit bus driver with independent nibble enables for partial bus arbitration. Use Value: Nibble control allows concurrent access to two 8-bit peripherals without full bus contention; 24 mA drive sustains signal integrity over 15 cm traces.
Hot-Swappable Backplane Interface	Low-Power Industrial Controller I/O Expansion
Use Scenario: Enabling safe insertion/removal of daughter cards in a 5 V backplane while host controller runs at 2.5 V. IC Role / Device Role / Timing Role: Bus isolation device leveraging IOFF to guarantee high-Z outputs during power sequencing mismatches. Use Value: Prevents back-powering and signal corruption during card hot-swap; MSL1 packaging supports reflow-compatible manufacturing.	Use Scenario: Expanding GPIO count of an ARM Cortex-M3 MCU in a battery-powered sensor node requiring <100 µA sleep current. IC Role / Device Role / Timing Role: Low-quiescent-current buffer for driving external sensors, LEDs, or relays with precise timing control. Use Value: 20 µA ICC and 5.5 V VIH enable direct interface to 5 V sensors while maintaining sub-µA system sleep budgets.

Memory Address Driving

TTL-Level Bus Transceiver

Use Scenario: Driving 16-bit address lines from a low-voltage microcontroller to SRAM or Flash memory operating at 5 V.

IC Role / Device Role / Timing Role: Non-inverting buffer with 5 V-tolerant outputs acting as voltage-level translator and fanout extender.

Use Value: Eliminates need for discrete level shifters; 4.5 ns propagation delay ensures setup/hold timing compliance at 100+ MHz clock rates.

Use Scenario: Isolating and buffering bidirectional data bus segments between 3.3 V FPGA and 5 V legacy peripherals.

IC Role / Device Role / Timing Role: Direction-agnostic 16-bit bus driver with independent nibble enables for partial bus arbitration.

Use Value: Nibble control allows concurrent access to two 8-bit peripherals without full bus contention; 24 mA drive sustains signal integrity over 15 cm traces.

Hot-Swappable Backplane Interface

Low-Power Industrial Controller I/O Expansion

Use Scenario: Enabling safe insertion/removal of daughter cards in a 5 V backplane while host controller runs at 2.5 V.

IC Role / Device Role / Timing Role: Bus isolation device leveraging IOFF to guarantee high-Z outputs during power sequencing mismatches.

Use Value: Prevents back-powering and signal corruption during card hot-swap; MSL1 packaging supports reflow-compatible manufacturing.

Use Scenario: Expanding GPIO count of an ARM Cortex-M3 MCU in a battery-powered sensor node requiring <100 µA sleep current.

IC Role / Device Role / Timing Role: Low-quiescent-current buffer for driving external sensors, LEDs, or relays with precise timing control.

Use Value: 20 µA ICC and 5.5 V VIH enable direct interface to 5 V sensors while maintaining sub-µA system sleep budgets.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC16244ADGGR	Same 48-pin TSSOP package, 1.65–3.6 V only, no 5 V tolerance - requires external clamping for 5 V inputs	Restricted to 3.3 V-only systems; unsuitable for mixed-voltage interfacing without added components	Select when cost optimization outweighs 5 V tolerance needs and system voltage is strictly ≤3.6 V
74ALVC16244PW	48-pin TSSOP, 1.65–3.6 V, 5 V-tolerant inputs only (not outputs), 3.5 ns t_PD @ 3.3 V	Cannot drive 5 V loads directly; limited to input-side level translation only	Choose when output loading remains within 3.3 V domain but upstream logic may be 5 V

Compared with SN74LVC16244ADGGR and 74ALVC16244PW, the MC74LCX16244DT uniquely supports full 5 V-tolerant I/O across its entire 1.65–5.5 V supply range - enabling true plug-and-play interoperability between legacy and modern logic families without redesign or additional circuitry.

Availability

MC74LCX16244DT is available at Aetrix Electronics and suitable for memory address driving, TTL-level bus transceiver, hot-swappable backplane interface, and low-power industrial controller I/O expansion requiring stable component supply and long-term lifecycle support.

Supply support for MC74LCX16244DT 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

onsemi (formerly ON Semiconductor) is a global semiconductor manufacturer specializing in energy-efficient power management, analog, logic, and discrete devices for automotive, industrial, and computing markets.

The MC74LCX16244DT belongs to the LCX family of low-voltage CMOS logic ICs designed specifically for mixed-voltage system interfacing, combining high speed, low power, and robust 5 V tolerance in space-constrained applications.

FAQ

What is the maximum operating temperature range for the MC74LCX16244DT?

The MC74LCX16244DT is rated for operation from −55 °C to +125 °C ambient temperature. This extended industrial temperature range supports deployment in harsh environments such as automotive engine control units, industrial motor drives, and outdoor communications infrastructure where thermal stability is critical. The MC74LCX16244DT maintains full electrical specifications across this entire range per its datasheet AC and DC characteristics tables.

Does the MC74LCX16244DT support live insertion and removal in powered systems?

Yes, the MC74LCX16244DT supports live insertion and withdrawal due to its IOFF specification, which guarantees high-impedance outputs even when V_CC = 0 V. This prevents back-driving of powered bus lines during hot-swap events. The MC74LCX16244DT's design ensures no current flows through inputs or outputs during power-off conditions, making it suitable for modular backplane and field-replaceable unit applications.

Can the MC74LCX16244DT drive standard TTL loads directly?

Yes, the MC74LCX16244DT provides LVTTL-compatible outputs with ±24 mA drive strength at V_CC = 3.0 V, exceeding the ±0.4 mA requirement for standard TTL inputs. Its VOH and VOL specifications meet or exceed TTL thresholds across its full 1.65–5.5 V supply range. The MC74LCX16244DT can directly drive up to 10 standard TTL loads per output without external buffering.

How many independent output enable controls does the MC74LCX16244DT have?

The MC74LCX16244DT has four independent Output Enable (OE1–OE4) inputs, each controlling a 4-bit nibble (O0–O3, O4–O7, O8–O11, O12–O15). This architecture enables granular bus segmentation - for example, enabling only memory address bits A0–A3 while holding A4–A15 in high-Z. The MC74LCX16244DT allows full 16-bit operation by tying all four OE inputs together.

Is the MC74LCX16244DT RoHS compliant and lead-free?

Yes, the MC74LCX16244DT is RoHS compliant and Pb-free, as confirmed by its "G" suffix marking and explicit statement in the datasheet. The device meets EU Directive 2011/65/EU and is halogen-free/BFR-free. Its TSSOP-48 package (Case 1201) uses matte tin lead finish and complies with JEDEC J-STD-020 moisture sensitivity level 1, supporting standard reflow soldering profiles.

MC74LCX16244DT Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: 74LCX

Package/Case:: 48-TFSOP (0.240", 6.10mm Width)

Packaging:: Tube

Product Status:: Active

Logic Type:: Buffer, Non-Inverting

Number of Elements:: 4

Number of Bits per Element:: 4

Input Type:: -

Output Type:: -

Current - Output High, Low:: 8mA, 8mA

Voltage - Supply:: 2V ~ 3.6V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 48-TSSOP

MC74LCX16244DT FAQ

1.How can I place an order for MC74LCX16244DT through Aetrix?

Please submit a Request for Quotation (RFQ) for MC74LCX16244DT 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 MC74LCX16244DT reliable?

The price and inventory of MC74LCX16244DT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for MC74LCX16244DT is usually 5 days.

3.What payment methods are accepted for MC74LCX16244DT?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for MC74LCX16244DT transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for MC74LCX16244DT?

MC74LCX16244DT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your MC74LCX16244DT 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 MC74LCX16244DT?

For technical support, including MC74LCX16244DT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your MC74LCX16244DT requirements.

6.How does Aetrix verify that MC74LCX16244DT is sourced from the original manufacturer or authorized distributors?

All MC74LCX16244DT 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 MC74LCX16244DT meets industry standards.

7.What is the process for return or replacement of MC74LCX16244DT?

All MC74LCX16244DT units undergo pre-shipment inspection (PSI). If there is an issue with MC74LCX16244DT, 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 MC74LCX16244DT part is unused and in its original packaging.

Return procedure for MC74LCX16244DT:

1.Submit a request within 90 days.

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

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