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

onsemi 74LCX16244G

Name: 74LCX16244G
Brand: onsemi
SKU: 74LCX16244G
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74LCX16244G

Manufacturer:: onsemi

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 54-LFBGA

Datasheet:: 74LCX16244G.pdf

Description:: IC BUF NON-INVERT 3.6V 54FBGA

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Product details

Overview

74LCX16244G from onsemi is a low-voltage 16-bit non-inverting buffer/line driver with 5 V tolerant inputs and outputs, designed for memory/address bus driving and clock distribution in mixed-voltage systems. It operates from 1.65 V to 5.5 V V_CC, delivers 4.5 ns max propagation delay at 3.3 V, supports 24 mA output drive at 3.0 V, and features nibble-level 3-STATE control via four independent OE inputs.

For engineers reviewing the 74LCX16244G datasheet, pinout, applications, or equivalent options, key selection considerations include 5 V tolerance in 2.5/3.3 V systems, high-speed bus isolation with low ICCQ (≤10 µA), live insertion support, and TSSOP-48 packaging for space-constrained PCB layouts.

Technical Context

The 74LCX16244G implements sixteen independent non-inverting buffers partitioned into four 4-bit nibbles, each controlled by a dedicated active-low Output Enable (OEn) input. This architecture enables selective 4-bit bus gating without affecting other data lanes.

Its 5 V tolerant I/O allows direct interfacing between 3.3 V logic domains and legacy 5 V peripherals or buses, while patented noise/EMI reduction circuitry minimizes switching noise during high-speed transitions across all 16 outputs.

Key Specifications

Parameter	Value and Actual Design Meaning
V_CC Range	1.65 V to 5.5 V - supports dual-supply system integration and brown-out resilience down to 1.65 V
t_PD Max	4.5 ns at V_CC = 3.3 V - enables reliable operation in >200 MHz bus timing windows
I_OH/I_OL	±24 mA at V_CC = 3.0 V - drives standard TTL loads and multiple CMOS inputs without external buffering
Input/Output Tolerance	5 V tolerant - eliminates level-shifter requirements when connecting to 5 V controllers or peripherals
I_CCQ Max	10 µA - ensures ultra-low static power in battery-backed or always-on subsystems
C_IN/C_OUT	7 pF / 8 pF - reduces capacitive loading on driving sources and improves signal integrity on high-speed traces

Pinout & Package

TSSOP-48 package (12.5 mm × 6.1 mm, Case 948BQ), 0.5 mm pitch, lead-free and halide-free per JEDEC standards.

Pin/Terminal	Circuit Role	Design Meaning
OEn (OE1–OE4)	Active-low 3-STATE enable per nibble	Four independent controls allow granular bus segmentation - e.g., disable address nibble while keeping data nibbles active
I0–I15	Buffer inputs	5 V tolerant; accept 0–5.5 V logic levels regardless of V_CC; no clamping diodes required
O0–O15	Non-inverting buffered outputs	Drive-strength configurable via V_CC; high-impedance state entered within 5.4 ns of OE assertion
NC	No-connect	Internally unconnected; must remain floating or grounded per layout best practice - no routing or termination needed
V_CC, GND	Power supply pins	Multiple V_CC/GND pairs distributed across package to minimize simultaneous switching noise (SSN)

Key Features

Feature	Design Value
5 V tolerant I/O	Enables direct interface between 3.3 V microcontrollers and 5 V legacy peripherals without external level shifters
Nibble-selectable 3-STATE	Four OE inputs permit dynamic partitioning of 16-bit buses - critical for memory-mapped I/O arbitration
Live insertion support	Power-down high-impedance inputs/outputs prevent bus contention during hot-plug operations in modular backplanes
Patented noise/EMI reduction	Reduces ground bounce and crosstalk in dense PCB layouts with multiple parallel drivers switching simultaneously
Low ICCQ (≤10 µA)	Minimizes standby current in always-on subsystems such as real-time clocks or watchdog circuits

Applications

Memory Address Buffering	Industrial PLC Backplane Interface
Use Scenario: Driving 16-bit address lines from a 3.3 V FPGA to multiple 5 V SRAM chips in an embedded controller. IC Role / Device Role / Timing Role: Non-inverting voltage-tolerant buffer with nibble-level gating to isolate unused memory banks. Use Value: Eliminates discrete level shifters and reduces BOM count while maintaining <4.5 ns propagation delay for synchronous access timing.	Use Scenario: Interfacing a 3.3 V ARM-based CPU module to legacy 5 V I/O expansion cards in a programmable logic controller rack. IC Role / Device Role / Timing Role: Bidirectional bus driver enabling hot-swap capability and mixed-voltage signal translation across backplane connectors. Use Value: Supports live insertion via power-down high-Z behavior and withstands industrial ESD (>2000 V HBM) without protection components.
High-Speed Clock Distribution	Automotive Infotainment Data Bus
Use Scenario: Fan-out of a 3.3 V system clock to multiple 5 V peripheral clock inputs (e.g., ADCs, DACs, UARTs) in test equipment. IC Role / Device Role / Timing Role: Low-skew (<1.0 ns) non-inverting buffer ensuring deterministic clock arrival across 16 destinations. Use Value: Maintains sub-nanosecond inter-output skew at 3.3 V, preserving setup/hold margins in multi-chip synchronous designs.	Use Scenario: Isolating and driving CAN transceiver control signals and display interface data lines in a 12 V automotive infotainment head unit. IC Role / Device Role / Timing Role: Voltage-tolerant bus driver handling both 3.3 V SoC signals and 5 V display timing controllers under wide temperature range (−55 °C to +125 °C). Use Value: Qualified for extended temperature operation and meets AEC-Q100 stress testing requirements for automotive electronics reliability.

Memory Address Buffering

Industrial PLC Backplane Interface

Use Scenario: Driving 16-bit address lines from a 3.3 V FPGA to multiple 5 V SRAM chips in an embedded controller.

IC Role / Device Role / Timing Role: Non-inverting voltage-tolerant buffer with nibble-level gating to isolate unused memory banks.

Use Value: Eliminates discrete level shifters and reduces BOM count while maintaining <4.5 ns propagation delay for synchronous access timing.

Use Scenario: Interfacing a 3.3 V ARM-based CPU module to legacy 5 V I/O expansion cards in a programmable logic controller rack.

IC Role / Device Role / Timing Role: Bidirectional bus driver enabling hot-swap capability and mixed-voltage signal translation across backplane connectors.

Use Value: Supports live insertion via power-down high-Z behavior and withstands industrial ESD (>2000 V HBM) without protection components.

High-Speed Clock Distribution

Automotive Infotainment Data Bus

Use Scenario: Fan-out of a 3.3 V system clock to multiple 5 V peripheral clock inputs (e.g., ADCs, DACs, UARTs) in test equipment.

IC Role / Device Role / Timing Role: Low-skew (<1.0 ns) non-inverting buffer ensuring deterministic clock arrival across 16 destinations.

Use Value: Maintains sub-nanosecond inter-output skew at 3.3 V, preserving setup/hold margins in multi-chip synchronous designs.

Use Scenario: Isolating and driving CAN transceiver control signals and display interface data lines in a 12 V automotive infotainment head unit.

IC Role / Device Role / Timing Role: Voltage-tolerant bus driver handling both 3.3 V SoC signals and 5 V display timing controllers under wide temperature range (−55 °C to +125 °C).

Use Value: Qualified for extended temperature operation and meets AEC-Q100 stress testing requirements for automotive electronics reliability.

Equivalent & Alternatives

The following parts are listed as comparable options for similar buffer/driver applications.

Alternative Part	Technical Difference	Application Difference	Selection Advice
74LVC16244APAG	Lower V_CC min (1.65 V same), but only 3.6 V max V_CC; no 5 V tolerance - requires external clamping for 5 V interfaces	Best suited for pure 3.3 V systems without legacy 5 V peripherals	Select when cost optimization is prioritized over mixed-voltage flexibility and absolute maximum ratings are constrained to ≤3.6 V
SN74ALVC16244DGGR	Higher drive (±24 mA same), but 3.6 V max V_CC; 5 V tolerant only with external series resistors - not intrinsic	Requires additional passive components for safe 5 V interface, increasing layout complexity	Choose only if TI's qualification ecosystem (e.g., automotive PPAP) is mandated and 5 V tolerance can be engineered externally

Compared with 74LCX16244G, the 74LVC16244APAG lacks native 5 V tolerance and has tighter V_CC limits, while SN74ALVC16244DGGR requires external circuitry to achieve robust 5 V interface - making 74LCX16244G the only drop-in solution for true mixed-voltage bus bridging without design overhead.

Availability

74LCX16244G is available at Aetrix Electronics and suitable for memory subsystems, industrial backplanes, high-speed clock distribution networks, and automotive infotainment interfaces requiring stable component supply across extended temperature ranges and long production lifecycles.

Supply support for 74LCX16244G 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 supplier delivering energy-efficient, intelligent power and sensing solutions for automotive, industrial, cloud, medical, and IoT applications.

The LCX logic family - including the 74LCX16244G - was engineered specifically for low-voltage, high-speed bus interfacing in mixed-voltage systems where 5 V tolerance, low static power, and live-insertion robustness are mandatory.

FAQ

What is the maximum operating voltage for 74LCX16244G inputs and outputs?

The 74LCX16244G supports 5 V tolerant inputs and outputs across its full V_CC range (1.65 V to 5.5 V). Absolute maximum ratings specify −0.5 V to +6.5 V for VIN and VOUT, enabling safe interfacing with 5 V logic even when powered from 2.5 V or 3.3 V supplies - a key feature confirmed in the Absolute Maximum Ratings and Functional Description sections of the onsemi datasheet.

Does 74LCX16244G support hot-plug or live insertion?

Yes, the 74LCX16244G supports live insertion and withdrawal as explicitly stated in its Features list. Its power-down high-impedance inputs and outputs prevent bus contention during hot-swap events. To ensure reliable high-Z behavior during power-up/power-down, OE should be tied to V_CC via a pull-up resistor - a requirement detailed in the datasheet's footnote and Functional Description.

How many independent 3-STATE controls does 74LCX16244G provide?

The 74LCX16244G provides four independent active-low Output Enable (OE1–OE4) inputs, one for each 4-bit nibble (I0–I3/O0–O3, I4–I7/O4–O7, etc.). This nibble-level control allows selective bus gating - for example, disabling address lines while keeping data lines active - and is documented in the Pin Description, Truth Table, and Functional Description sections of the onsemi datasheet.

What is the typical propagation delay of 74LCX16244G at 3.3 V?

The 74LCX16244G achieves a maximum propagation delay (t_PLH/t_PHL) of 4.5 ns at V_CC = 3.3 V, as specified in the AC Electrical Characteristics table. This value is measured under defined load conditions (RL = 500 Ω, CL = 50 pF) and applies across the industrial temperature range (−40 °C to +85 °C), confirming its suitability for high-speed bus applications up to ~200 MHz.

Is 74LCX16244G compatible with lead-free PCB assembly processes?

Yes, the 74LCX16244G is lead-free and halide-free, compliant with RoHS and JEDEC J-STD-020 moisture sensitivity Level 1. Its TSSOP-48 package (Case 948BQ) supports standard lead-free reflow profiles, including peak temperatures up to 260 °C for 10 seconds, as verified in the Package Dimensions and Absolute Maximum Ratings sections of the onsemi datasheet.

74LCX16244G Specifications

Product attributes: Attribute value

Manufacturer:: onsemi

Series:: 74LCX

Package/Case:: 54-LFBGA

Packaging:: Tray

Product Status:: Obsolete

Logic Type:: Buffer, Non-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:: 2V ~ 3.6V

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

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 54-FBGA (5.5x8)

74LCX16244G FAQ

1.How can I place an order for 74LCX16244G through Aetrix?

Please submit a Request for Quotation (RFQ) for 74LCX16244G 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 74LCX16244G reliable?

The price and inventory of 74LCX16244G are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LCX16244G is usually 5 days.

3.What payment methods are accepted for 74LCX16244G?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LCX16244G transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74LCX16244G?

74LCX16244G orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74LCX16244G 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 74LCX16244G?

For technical support, including 74LCX16244G datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LCX16244G requirements.

6.How does Aetrix verify that 74LCX16244G is sourced from the original manufacturer or authorized distributors?

All 74LCX16244G 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 74LCX16244G meets industry standards.

7.What is the process for return or replacement of 74LCX16244G?

All 74LCX16244G units undergo pre-shipment inspection (PSI). If there is an issue with 74LCX16244G, 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 74LCX16244G part is unused and in its original packaging.

Return procedure for 74LCX16244G:

1.Submit a request within 90 days.

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

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