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onsemi 74LVX244SJX
- Part No.:
- 74LVX244SJX
- Manufacturer:
- onsemi
- Package:
- 20-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
74LVX244SJX.pdf
- Description:
- IC BUFFER NON-INVERT 3.6V 20SOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,990
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Product details
Overview
74LVX244SJX 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 systems. It operates from 2.0V to 3.6V, tolerates 5.5V inputs, delivers ±24mA drive strength, and supports simultaneous switching noise control per JEDEC J-STD-020B Pb-free SOP packaging.
For engineers reviewing the 74LVX244SJX datasheet, pinout, applications, or equivalent options, key selection criteria include 3.3V-compatible I/O translation, dual independent output-enable control (OE1/OE2), guaranteed AC timing at 3.3V ±0.3V, and EIAJ TYPE II 20-pin SOP (M20D) package compatibility with industrial temperature range (–40°C to +85°C).
Technical Context
The 74LVX244SJX implements two independent 4-bit groups (I0–I3/O0–O3 and I4–I7/O4–O7), each controlled by separate 3-STATE enable inputs OE1 (pins 12,14,16,18) and OE2 (pins 3,5,7,9). Its input structure supports 5V-tolerant logic levels while operating from a 3.3V supply, enabling direct interfacing between legacy 5V peripherals and modern low-voltage buses.
AC performance is specified across VCC = 2.7V and 3.3V ±0.3V, with propagation delays as low as 4.7ns (tPLH, CL=15pF) and output skew ≤1.5ns. The device meets simultaneous switching noise (SSN) and dynamic threshold requirements defined in its datasheet, ensuring signal integrity in high-density PCB layouts.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.0V to 3.6V - Enables operation in standard 3.3V systems with margin for supply variation. |
| Input Voltage Tolerance | 0V to 5.5V - Allows safe interface with 5V logic without level shifters. |
| Output Drive | ±24mA - Sufficient to drive 50Ω transmission lines or multiple CMOS loads. |
| tPLH / tPHL (3.3V) | 4.7ns / 7.2ns (CL=15pF) - Supports >100MHz bus signaling in point-to-point configurations. |
| 3-STATE Enable Skew | tPZL/tPHZ ≤13.0ns (CL=50pF, RL=1kΩ) - Ensures clean bus release during direction switching. |
| Operating Temperature | –40°C to +85°C - Qualified for industrial-grade embedded and computing applications. |
| Package | EIAJ TYPE II 20-pin SOP (M20D), 5.3mm wide - Compatible with standard surface-mount assembly processes. |
Pinout & Package
Pb-Free 20-pin Small Outline Package (SOP), EIAJ TYPE II, 5.3mm wide (Package Number M20D).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 4, 6, 8, 10, 11, 13 | Inputs (I0–I7) | Non-inverting data inputs; 5.5V-tolerant, compatible with TTL and CMOS logic families. |
| 3, 5, 7, 9 | OE2 (Output Enable 2) | Active-low enable for outputs O4–O7; controls group 2 independently of group 1. |
| 12, 14, 16, 18 | OE1 (Output Enable 1) | Active-low enable for outputs O0–O3; enables bidirectional bus partitioning. |
| 15, 17, 19, 20, 2, 4, 6, 8 | Outputs (O0–O7) | 3-STATE outputs with ±24mA sink/source capability; high-impedance state when OE asserted. |
| 10 | GND | Ground reference for all I/O and internal circuitry. |
| 20 | VCC | Primary power supply (2.0–3.6V); decoupling required per high-speed digital layout practice. |
Key Features
| Feature | Design Value |
|---|---|
| 5V-tolerant inputs | Supports direct connection to 5V microcontrollers or FPGAs without external level-shifting components. |
| Dual independent 3-STATE control | Enables selective activation of two 4-bit data paths-ideal for multiplexed address/data buses or isolated peripheral interfaces. |
| Guaranteed SSN performance | Meets simultaneous switching noise limits per datasheet test conditions, reducing ground bounce in dense PCB layouts. |
| Low quiescent current | ICC ≤40µA at VCC=3.6V - Minimizes static power in battery-backed or always-on subsystems. |
| Pb-free EIAJ SOP package | M20D footprint aligns with IPC-7351 standards and supports automated optical inspection (AOI) and reflow profiling. |
Applications
| Memory Address Buffering | Industrial Bus Transceiver Interface |
|---|---|
|
Use Scenario: Driving 16-bit address lines from a 3.3V microcontroller to legacy 5V SRAM or EPROM devices. IC Role / Device Role / Timing Role: Non-inverting voltage-translating buffer with 3-STATE isolation during read cycles. Use Value: Eliminates need for discrete level shifters while maintaining <10ns propagation delay and deterministic bus release timing. |
Use Scenario: Isolating CAN controller I/O from noisy motor drive subsystems in PLC backplanes. IC Role / Device Role / Timing Role: Direction-controlled line driver with independent OE1/OE2 for half-duplex bus arbitration. Use Value: Prevents contention during bus turnaround via staggered 3-STATE disable (tPHZ ≤13ns), reducing signal corruption risk. |
| Low-Power Clock Distribution | Embedded Display Interface Driver |
|
Use Scenario: Fan-out of a 3.3V system clock to multiple low-power ASICs with varying input thresholds. IC Role / Device Role / Timing Role: Low-skew (≤1.5ns) clock buffer with 5.5V-tolerant inputs for hybrid clock tree architectures. Use Value: Maintains jitter budget under load while supporting mixed-supply SoC integration without additional regulators. |
Use Scenario: Driving parallel RGB interface signals (HSYNC, VSYNC, DATA[7:0]) from an ARM Cortex-M7 MCU to a TFT-LCD module. IC Role / Device Role / Timing Role: Octal line driver with matched trace-length compensation via consistent tPLH/tPHL specs. Use Value: Ensures setup/hold timing compliance across all 8 data bits at 25MHz pixel rates with minimal board area. |
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 | Wider VCC range (1.65–3.6V); lower VOL (0.55V @ 24mA) but no 5.5V input tolerance. | Requires external clamping for 5V inputs; better suited for pure 3.3V or 2.5V-only systems. | Select when full 5V-tolerance is unnecessary and tighter VOL is critical for downstream logic thresholds. |
| 74ALVC244MTCX | Faster tPLH (3.2ns @ 3.3V, CL=15pF); higher ICC (100µA typical); same M20D package. | Higher speed comes at cost of increased static power and reduced noise margin vs. LVX family. | Choose for timing-critical applications where sub-4ns delay outweighs quiescent current and SSN requirements. |
Compared with SN74LVC244APWR and 74ALVC244MTCX, the 74LVX244SJX uniquely balances 5.5V input tolerance, industrial temperature support, and verified simultaneous switching noise control-making it optimal for mixed-voltage industrial control and legacy peripheral interfacing where reliability trumps raw speed.
Availability
74LVX244SJX is available at Aetrix Electronics and suitable for industrial automation controllers, embedded display interfaces, and mixed-voltage memory subsystems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for 74LVX244SJX 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 (formerly Fairchild Semiconductor) is a global semiconductor manufacturer specializing in energy-efficient power management, analog, logic, and sensor solutions for automotive, industrial, and cloud infrastructure markets.
The 74LVX244SJX belongs to ON Semiconductor's legacy LVX logic family, engineered specifically for low-voltage, 5V-tolerant interfacing in industrial and computing applications where mixed-supply compatibility and noise immunity are critical.
FAQ
What is the maximum input voltage rating for 74LVX244SJX?
The 74LVX244SJX supports DC input voltages from 0V to 5.5V, independent of VCC. This 5.5V tolerance allows direct connection to 5V logic sources while operating from a 3.3V supply-no external level-shifting circuitry is needed. Absolute maximum ratings specify VI up to 7.0V, but functional operation is guaranteed only within 0V–5.5V per the recommended operating conditions table in the datasheet.
Does 74LVX244SJX support true bidirectional data flow?
No, the 74LVX244SJX is a unidirectional octal buffer: inputs (I0–I7) drive corresponding outputs (O0–O7) with non-inverting logic. Bidirectional operation requires external control logic to manage OE1/OE2 and coordinate direction-e.g., using one group for transmit and another for receive in half-duplex protocols. The device itself does not contain internal direction control or bus transceiver logic.
What is the thermal resistance (θJA) for the 74LVX244SJX in its M20D package?
The 74LVX244SJX in the Pb-free EIAJ TYPE II 20-pin SOP (M20D) package has a typical junction-to-ambient thermal resistance (θJA) of 120°C/W under standard JEDEC JESD51-7 conditions (single-layer 1-in² copper pad). This value assumes no internal thermal vias or enhanced PCB copper; actual θJA will improve with proper thermal land design and airflow in the end application.
Can 74LVX244SJX be used in automotive applications?
The 74LVX244SJX is qualified for industrial temperature range (–40°C to +85°C) but is not AEC-Q100 qualified. While it may function in under-hood or infotainment environments, ON Semiconductor explicitly excludes this device from use in safety-critical automotive systems-including ADAS, powertrain, or body control modules-due to lack of automotive-grade qualification, stress testing, and failure-in-time (FIT) data.
How does the 3-STATE enable architecture of 74LVX244SJX differ from single-enable octal buffers?
The 74LVX244SJX features two independent active-low 3-STATE enables-OE1 controls outputs O0–O3, and OE2 controls O4–O7-enabling granular bus partitioning. Unlike single-enable buffers (e.g., 74LVX240), this allows concurrent driving of two independent 4-bit data paths or staggered bus release to reduce ground bounce, directly supporting multi-segment memory or peripheral addressing schemes.
74LVX244SJX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74LVX
- Package/Case:
- 20-SOIC (0.209", 5.30mm 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-SOP
74LVX244SJX FAQ
1.How can I place an order for 74LVX244SJX through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVX244SJX 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 74LVX244SJX reliable?
The price and inventory of 74LVX244SJX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVX244SJX is usually 5 days.
3.What payment methods are accepted for 74LVX244SJX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVX244SJX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVX244SJX?
74LVX244SJX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVX244SJX 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 74LVX244SJX?
For technical support, including 74LVX244SJX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVX244SJX requirements.
6.How does Aetrix verify that 74LVX244SJX is sourced from the original manufacturer or authorized distributors?
All 74LVX244SJX 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 74LVX244SJX meets industry standards.
7.What is the process for return or replacement of 74LVX244SJX?
All 74LVX244SJX units undergo pre-shipment inspection (PSI). If there is an issue with 74LVX244SJX, 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 74LVX244SJX part is unused and in its original packaging.
Return procedure for 74LVX244SJX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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