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

STMicroelectronics 74LVX244MTR

Name: 74LVX244MTR
Brand: STMicroelectronics
SKU: 74LVX244MTR
Price: 2.40 USD
Availability: InStock
Rating: 5 (2 reviews)

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Part No.:: 74LVX244MTR

Manufacturer:: STMicroelectronics

Category:: Buffers, Drivers, Receivers, Transceivers

Package:: 20-SOIC (0.295", 7.50mm Width)

Datasheet:: 74LVX244MTR.pdf

Description:: IC BUFFER NON-INVERT 3.6V 20SOP

Quantity:: RFQ Add To RFQ list

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Product details

Overview

74LVX244MTR from STMicroelectronics is a low-voltage CMOS octal bus buffer with non-inverting 3-state outputs, designed for level-shifting and bus isolation between 5V and 3.3V systems. It features 4.5 ns typical propagation delay at V_CC = 3.3V, 5V-tolerant inputs, ±4 mA symmetrical output drive, 2V–3.6V operating range, and power-down input protection-used in embedded microcontroller I/O expansion and mixed-voltage data buses.

For engineers reviewing the 74LVX244MTR datasheet, 74LVX244MTR pinout, 74LVX244MTR application, or 74LVX244MTR equivalent, key selection criteria include 5V-tolerant input compatibility, 3.3V supply operation, 3-state enable timing (t_PZL/t_PLZ), symmetrical drive strength, and ESD immunity (2 kV HBM) in space-constrained industrial control interfaces.

Technical Context

The 74LVX244MTR implements dual 4-bit non-inverting buffers, each controlled by independent 3-state output enables (1G, 2G). Its C2MOS process enables true 5V-tolerant inputs regardless of V_CC, supporting safe interfacing from legacy 5V logic to modern 3.3V domains without external resistors or clamps.

All inputs feature diode-clamped protection and power-down immunity-inputs accept 0–7V signals even when V_CC = 0V. Output impedance is balanced (|I_OH| = I_OL ≥ 4 mA), ensuring matched rise/fall times and low ground bounce (V_OLP = 0.5 V typical).

Key Specifications

Parameter	Value and Actual Design Meaning
Propagation Delay	4.5 ns typ. at V_CC = 3.3V, CL = 15 pF - enables high-speed 3.3V bus buffering up to ~100 MHz data rates
Supply Voltage Range	2.0 V to 3.6 V - supports battery-powered and low-noise 3.3V systems with 1.2V data retention
Input Voltage Tolerance	0 V to 7 V independent of V_CC - allows direct 5V signal interfacing without level shifters
Output Drive Strength	±4 mA min. at V_CC = 3.0V - ensures robust fan-out to 10+ LVTTL loads with controlled edge rates
Quiescent Current	4 µA max. at T_A = 25°C - critical for always-on, ultra-low-power monitoring nodes
ESD Immunity	2 kV HBM - protects against handling-induced discharge in assembly and field service
Operating Temperature	−55°C to +125°C - qualified for under-hood automotive and industrial motor control environments

Pinout & Package

74LVX244MTR is housed in a 20-pin SOIC (Small Outline Integrated Circuit) package per JEDEC MS-013, 7.6 mm width, 2.65 mm height, 1.27 mm lead pitch. Pin 1 marked with notch or dot; pin 10 = GND, pin 20 = V_CC.

Pin/Terminal	Circuit Role	Design Meaning
1, 19	Output Enable (1G, 2G)	Active-low enables for two independent 4-bit buffer groups; asserts high-impedance state on associated Y outputs
2,4,6,8 / 11,13,15,17	Data Inputs (1A1–1A4, 2A1–2A4)	5V-tolerant CMOS inputs accepting 0–7V; no pull-up/down required; latch-up immune
3,5,7,9 / 12,14,16,18	Data Outputs (1Y1–1Y4, 2Y1–2Y4)	Non-inverting 3-state CMOS outputs; symmetrical sourcing/sinking; low noise (V_OLP = 0.5 V)
10	GND	Ground reference for all I/O and internal logic; decoupling capacitor must be placed adjacent
20	V_CC	Primary 2.0–3.6V supply; powers internal logic and output drivers; requires local 100 nF ceramic bypass

Key Features

Feature	Design Value
5V-Tolerant Inputs	Accepts 0–7V input signals regardless of V_CC state - eliminates external level translators in mixed-voltage designs
Power-Down Input Protection	Inputs remain protected and non-destructive even when V_CC = 0V - enables hot-plug and partial-power-down system architectures
Balanced Propagation Delays	t_PLH ≅ t_PHL - minimizes duty cycle distortion in clock distribution and bidirectional data paths
Low Dynamic Noise	V_OLP = 0.5 V typical at V_CC = 3.3V - reduces simultaneous switching noise in dense PCB layouts
Pin-Compatible with 74 Series	SOIC-20 footprint matches legacy 74AC/74HC244 - enables drop-in upgrade to lower voltage and power

Applications

Industrial PLC I/O Expansion

Automotive Body Control Module

Use Scenario: Isolating and buffering digital I/O lines between 5V sensor interfaces and 3.3V microcontroller peripherals in programmable logic controllers.

IC Role / Device Role / Timing Role: Non-inverting 3-state bus buffer providing level translation, noise isolation, and controlled bus release timing.

Use Value: Eliminates need for discrete resistor dividers or dedicated level shifters while maintaining <4.5 ns signal integrity across 16-channel I/O banks.

Use Scenario: Interfacing legacy 5V dashboard switches and lamp drivers to a 3.3V CAN microcontroller in body electronics modules.

IC Role / Device Role / Timing Role: Dual-group octal buffer enabling independent enable control for lighting and switch scan functions.

Use Value: Supports hot-swap-safe input monitoring during sleep mode (V_CC = 0V) and meets automotive −40°C to +125°C ambient requirements.

Portable Medical Sensor Hub

Test Equipment Signal Conditioning

Use Scenario: Aggregating analog-to-digital converter outputs and sensor status flags onto a shared 3.3V data bus in battery-powered diagnostic devices.

IC Role / Device Role / Timing Role: Low-power octal buffer managing bus contention during multi-sensor readout sequences.

Use Value: Quiescent current ≤4 µA extends battery life; 5V-tolerant inputs accept direct connection to unregulated sensor supply rails.

Use Scenario: Driving multiple measurement channels from a single FPGA I/O bank in automated test equipment with mixed-voltage DUT interfaces.

IC Role / Device Role / Timing Role: High-speed, low-skew buffer ensuring synchronized sampling across parallel analog front-ends.

Use Value: Output skew ≤0.5 ns (typ.) guarantees sub-nanosecond channel alignment; SOIC-20 simplifies rework and probe access.

Equivalent & Alternatives

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

Alternative Part	Technical Difference	Application Difference	Selection Advice
SN74LVC244APWR	Lower V_CC min (1.65V), higher speed (t_PD = 3.3 ns), but only 5.5V input tolerant	Preferred for 1.8V–3.3V-only systems; not suitable for direct 5V input without clamping	Select when full 5V tolerance is unnecessary and maximum speed at 3.3V is prioritized
74ALVC244MTCX	Wider V_CC range (1.65–3.6V), faster (t_PD = 2.8 ns), same 5V input tolerance, but higher ICC (20 µA)	Better for ultra-high-speed 3.3V buses where quiescent current is secondary to timing margin	Choose when propagation delay budget is <3 ns and 2 kV ESD suffices without enhanced latch-up immunity

Compared with SN74LVC244APWR and 74ALVC244MTCX, the 74LVX244MTR uniquely combines guaranteed 7V input tolerance, zero-V_CC power-down safety, and 2 kV latch-up immunity-making it the only option for ruggedized 5V-to-3.3V bridging in harsh industrial or automotive environments.

Availability

74LVX244MTR is available at Aetrix Electronics and suitable for industrial PLC I/O expansion, automotive body control modules, portable medical sensor hubs, and test equipment signal conditioning requiring stable component supply across extended temperature and mixed-voltage conditions.

Supply support for 74LVX244MTR 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

STMicroelectronics is a global semiconductor leader headquartered in Geneva, Switzerland, specializing in automotive, industrial, and power management ICs with vertical manufacturing and broad analog/mixed-signal portfolio.

The 74LVX series targets low-voltage, low-power, and high-noise-immunity applications in battery-operated and mixed-supply systems-designed specifically for reliable 3.3V logic interfacing with legacy 5V infrastructure.

FAQ

Can 74LVX244MTR operate with V_CC = 2.5V?

Yes. The device is fully specified from V_CC = 2.0 V to 3.6 V, including guaranteed VIH/VIL thresholds, output drive, and propagation delay. At 2.5V, t_PD increases to ~7.1 ns (typ.), IOH/IOL remains ≥4 mA, and input tolerance holds at 0–7V.

Is the 74LVX244MTR pin-compatible with standard 74LS244?

Yes-pinout and logic function match 74LS244 and 74HC244 in SOIC-20 packages. However, 74LVX244MTR uses CMOS inputs (no DC load), requires no pull-ups, and operates only at 2.0–3.6V-not 5V-so V_CC must be regulated accordingly.

What is the maximum capacitive load this device can drive reliably?

Per AC specs, CL = 50 pF is used for timing characterization. With 4 mA drive strength and 0.5 V typical quiet output noise, it reliably drives ≤50 pF loads at full speed; for >50 pF, derate frequency or add series termination to limit ringing.

Does 74LVX244MTR support hot-swap insertion when V_CC is unpowered?

Yes. Its power-down protection allows inputs to safely accept 0–7V signals with V_CC = 0V, and outputs remain in high-impedance state. No back-powering or latch-up occurs-enabling true hot-swap capability in modular backplane designs.

74LVX244MTR Specifications

Product attributes: Attribute value

Manufacturer:: STMicroelectronics

Series:: 74LVX

Package/Case:: 20-SOIC (0.295", 7.50mm Width)

Packaging:: Tape & Reel (TR)

Product Status:: Obsolete

Logic Type:: Buffer, Non-Inverting

Number of Elements:: 2

Number of Bits per Element:: 4

Input Type:: -

Output Type:: 3-State

Current - Output High, Low:: 4mA, 4mA

Voltage - Supply:: 2V ~ 3.6V

Operating Temperature:: -55°C ~ 125°C (TA)

Grade:: -

Qualification:: -

Mounting Type:: Surface Mount

Supplier Device Package:: 20-SO

74LVX244MTR FAQ

1.How can I place an order for 74LVX244MTR through Aetrix?

Please submit a Request for Quotation (RFQ) for 74LVX244MTR 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 74LVX244MTR reliable?

The price and inventory of 74LVX244MTR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVX244MTR is usually 5 days.

3.What payment methods are accepted for 74LVX244MTR?

We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVX244MTR transactions.

Note: Certain payment methods may incur a processing fee.

4.How is shipping managed for 74LVX244MTR?

74LVX244MTR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.

Once your 74LVX244MTR 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 74LVX244MTR?

For technical support, including 74LVX244MTR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVX244MTR requirements.

6.How does Aetrix verify that 74LVX244MTR is sourced from the original manufacturer or authorized distributors?

All 74LVX244MTR 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 74LVX244MTR meets industry standards.

7.What is the process for return or replacement of 74LVX244MTR?

All 74LVX244MTR units undergo pre-shipment inspection (PSI). If there is an issue with 74LVX244MTR, 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 74LVX244MTR part is unused and in its original packaging.

Return procedure for 74LVX244MTR:

1.Submit a request within 90 days.

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

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