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onsemi 74LVX244MX
- Part No.:
- 74LVX244MX
- Manufacturer:
- onsemi
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74LVX244MX.pdf
- Description:
- IC BUF NON-INVERT 3.6V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:3,120
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Product details
Overview
74LVX244MX from ON Semiconductor is a low-voltage octal non-inverting buffer/line driver with dual 3-STATE outputs, designed for memory address and clock distribution in mixed-voltage (3.3V/5V) systems. It features 20-pin SOIC packaging, ±25 mA output drive, 3.3 V nominal supply operation, and 7 V tolerant inputs enabling 5 V-to-3.3 V level translation. Used in bus interface and data path isolation applications.
For engineers reviewing the 74LVX244MX datasheet, pinout, applications, or equivalent options, key selection criteria include simultaneous switching noise performance, guaranteed 3-STATE disable timing (tPHZ ≤ 13.0 ns at 3.3 V), input voltage translation capability, and JEDEC MS-013 SOIC package compatibility.
Technical Context
The 74LVX244MX implements two independent 4-bit non-inverting buffer sections, each controlled by a dedicated 3-STATE enable input (OE1/OE2). Its CMOS design ensures low static current (ICC ≤ 40 µA) and rail-to-rail output swing under load.
Input tolerance up to 7 V allows direct interfacing with 5 V logic while operating from a 2.0–3.6 V supply. Propagation delays are specified from 4.7 ns (tPLH, CL = 15 pF, VCC = 3.3 V) to 17.0 ns (tPHL, CL = 50 pF, VCC = 2.7 V), with output skew ≤1.5 ns across channels.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.0 V to 3.6 V - supports standard 3.3 V systems with margin for supply variation |
| Input Voltage Range | 0 V to 5.5 V - enables safe 5 V TTL/CMOS input interfacing without external level shifters |
| Output Drive | ±25 mA - sufficient to drive 50 Ω transmission lines or multiple CMOS loads |
| tPLH / tPHL | 4.7 ns / 7.2 ns (CL = 15 pF, VCC = 3.3 V) - ensures tight timing control in high-speed address/data buses |
| tPZH / tPHZ | 5.5 ns / 9.7 ns (CL = 15 pF, RL = 1 kΩ, VCC = 3.3 V) - guarantees fast, predictable 3-STATE enable/disable for bus arbitration |
| IOZ (Off-State Current) | ±2.5 µA max - minimizes leakage-induced signal corruption during high-impedance mode |
| VIH/VIL Thresholds | 2.4 V / 0.8 V at VCC = 3.6 V - provides robust noise margins (>0.7 V) in noisy industrial environments |
Pinout & Package
74LVX244MX is packaged in a 20-lead Small Outline Integrated Circuit (SOIC), JEDEC MS-013, 0.300" wide (Package Number M20B), lead-free per JEDEC J-STD-020B.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | OE1, OE2 | Active-low 3-STATE enable inputs controlling first and second 4-bit buffer groups respectively |
| 2–5, 11–14 | I0–I3, I4–I7 | Non-inverting digital inputs accepting 0–5.5 V logic levels |
| 6–9, 15–18 | O0–O3, O4–O7 | Buffered non-inverting outputs with ±25 mA sink/source capability |
| 10 | GND | Ground reference for all internal circuitry and I/O |
| 20 | VCC | Primary power supply (2.0–3.6 V); powers both logic core and output drivers |
Key Features
| Feature | Design Value |
|---|---|
| 5 V–tolerant inputs | Enables direct connection to legacy 5 V logic without external resistors or translators |
| Simultaneous switching noise control | Guaranteed dynamic VOL/VOLP limits ensure stable output behavior during multi-bit transitions |
| Low quiescent current | ICC ≤ 40 µA at VCC = 3.6 V reduces system-level standby power in battery-sensitive designs |
| High-speed 3-STATE control | tPHZ ≤ 13.0 ns (max) at 3.3 V supports >30 MHz bus turnaround in shared-data-path architectures |
| JEDEC-compliant SOIC footprint | M20B package enables drop-in replacement in existing PCB layouts designed for industry-standard 20-pin SOIC |
Applications
| Memory Address Buffering | Microcontroller Bus Interface |
|---|---|
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: Non-inverting voltage-translating buffer isolating controller outputs and reducing capacitive loading on the address bus. Use Value: Eliminates need for discrete level-shifting components while maintaining <10 ns propagation delay and sub-1 ns channel-to-channel skew. | Use Scenario: Interfacing a 3.3 V ARM Cortex-M4 GPIO port to a 5 V peripheral UART or SPI controller. IC Role / Device Role / Timing Role: Bidirectional bus driver with independent 3-STATE control per 4-bit group for flexible data direction management. Use Value: Enables clean bus release via OE1/OE2 without contention, supporting half-duplex protocols with deterministic turn-around timing. |
| Industrial PLC I/O Expansion | Digital Signal Processor Clock Distribution |
Use Scenario: Isolating and buffering digital I/O signals between a 3.3 V FPGA and ruggedized 5 V field I/O modules in programmable logic controllers. IC Role / Device Role / Timing Role: High-noise-margin buffer providing ESD-robust signal integrity across long PCB traces in electrically noisy factory environments. Use Value: VIH/VIL thresholds of 2.4 V/0.8 V at 3.6 V supply deliver >700 mV noise immunity, exceeding IEC 61000-4-4 Level 3 requirements. | Use Scenario: Distributing a low-jitter 3.3 V clock signal from a crystal oscillator to multiple DSP memory interfaces and peripherals. IC Role / Device Role / Timing Role: Low-skew, low-capacitance line driver minimizing clock edge degradation across fanout branches. Use Value: Output skew ≤1.5 ns and COUT = 6 pF preserve signal integrity for synchronous DDR2/SDRAM timing budgets. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer/line driver applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC244APWR | 3.3 V only input tolerance (max VI = VCC + 0.5 V); no 5 V tolerance | Requires external clamping or level shifters when interfacing to 5 V sources | Select when full 5 V input tolerance is unnecessary and lower cost is prioritized |
| 74ALVC244MTCX | Faster tPLH (3.2 ns typ at 3.3 V), but higher ICC (100 µA max) and no 7 V input rating | Better for ultra-high-speed timing-critical paths where power efficiency is secondary | Select when propagation delay <4 ns is mandatory and 5 V input compatibility is not required |
Compared with SN74LVC244APWR and 74ALVC244MTCX, the 74LVX244MX uniquely combines 7 V input tolerance, low ICC, and JEDEC MS-013 SOIC compatibility-making it optimal for legacy 5 V system integration without redesigning signal conditioning or layout.
Availability
74LVX244MX is available at Aetrix Electronics and suitable for memory subsystems, microcontroller peripheral interfaces, industrial I/O expansion, and clock distribution networks requiring stable component supply and long-term manufacturability.
Supply support for 74LVX244MX 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
ON Semiconductor is a global semiconductor manufacturer specializing in energy-efficient power management, analog, logic, and sensor solutions for automotive, industrial, cloud computing, and IoT applications.
The 74LVX244MX belongs to ON Semiconductor's legacy logic portfolio inherited from Fairchild, engineered specifically for mixed-voltage board-level interfacing where reliability, noise immunity, and backward compatibility are critical.
FAQ
What is the maximum input voltage rating for 74LVX244MX?
The 74LVX244MX supports DC input voltages up to 7 V, independent of VCC. This allows safe interfacing with 5 V logic families while operating from a 3.3 V supply. The absolute maximum rating is specified in the datasheet as VI = –0.5 V to 7.0 V, and operation beyond this range may cause permanent damage to the device.
Does 74LVX244MX support true bidirectional data flow?
No, the 74LVX244MX is a unidirectional non-inverting buffer with fixed input-to-output signal direction. It does not contain internal direction-control logic or bus transceivers. Data flows only from I0–I7 to O0–O7; bidirectional operation requires external control of OE1/OE2 and complementary circuitry.
What is the recommended operating temperature range for 74LVX244MX?
The 74LVX244MX is rated for operation from –40 °C to +85 °C ambient temperature. This industrial-grade range is validated across all electrical specifications including propagation delay, output drive, and 3-STATE timing parameters, making it suitable for deployment in harsh environmental conditions.
Can 74LVX244MX be used with a 2.5 V supply?
Yes, the 74LVX244MX supports VCC as low as 2.0 V. At 2.5 V, VIH is guaranteed ≥1.5 V and VOL ≤0.1 V (IOL = 50 µA), ensuring reliable logic detection and low output voltage drop. However, output drive strength decreases proportionally, limiting fanout capability compared to 3.3 V operation.
Is 74LVX244MX RoHS compliant and lead-free?
Yes, the 74LVX244MX is manufactured in a Pb-free SOIC package compliant with JEDEC J-STD-020B and RoHS Directive 2011/65/EU. The M20B package uses matte tin lead finish and meets IPC/JEDEC standard reflow profiles for lead-free assembly processes.
74LVX244MX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- 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:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
74LVX244MX FAQ
1.How can I place an order for 74LVX244MX through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVX244MX 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 74LVX244MX reliable?
The price and inventory of 74LVX244MX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVX244MX is usually 5 days.
3.What payment methods are accepted for 74LVX244MX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVX244MX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVX244MX?
74LVX244MX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVX244MX 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 74LVX244MX?
For technical support, including 74LVX244MX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVX244MX requirements.
6.How does Aetrix verify that 74LVX244MX is sourced from the original manufacturer or authorized distributors?
All 74LVX244MX 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 74LVX244MX meets industry standards.
7.What is the process for return or replacement of 74LVX244MX?
All 74LVX244MX units undergo pre-shipment inspection (PSI). If there is an issue with 74LVX244MX, 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 74LVX244MX part is unused and in its original packaging.
Return procedure for 74LVX244MX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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