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onsemi 74LVX244MTC
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- Part No.:
- 74LVX244MTC
- Manufacturer:
- onsemi
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74LVX244MTC.pdf
- Description:
- IC BUF NON-INVERT 3.6V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,236
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Product details
Overview
74LVX244MTC 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 features 1.5ns max output-to-output skew at 3.3V.
For engineers reviewing the 74LVX244MTC datasheet, pinout, applications, or equivalent options, key selection criteria include 3.3V-compatible 3-STATE control timing (tPZL ≤ 19.0ns), simultaneous switching noise immunity, input voltage translation (5V→3.3V), and TSSOP-20 package suitability for high-density PCBs.
Technical Context
The 74LVX244MTC implements two independent 4-bit non-inverting buffers, each controlled by a dedicated 3-STATE enable (OE1/OE2). Its CMOS input structure supports 5.5V-tolerant logic levels while operating from a 3.3V supply, enabling direct interfacing between legacy 5V peripherals and modern low-voltage buses.
Propagation delays are specified at 4.7ns (tPLH) and 7.2ns (tPHL) under 15pF load at 3.3V; 3-STATE enable/disable times (tPZL/tPHZ) are guaranteed ≤13.0ns and ≤14.0ns respectively. Dynamic noise parameters (VOLP/VOLV = 0.5–0.8V) ensure robust signal integrity during bus contention.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.0V to 3.6V - Enables operation in standard 3.3V systems with margin for rail tolerance. |
| Input Voltage Range | 0V to 5.5V - Allows safe interfacing with 5V TTL/CMOS logic without level shifters. |
| Output Drive | ±24mA - Sufficient to drive 50Ω transmission lines or multiple CMOS loads on shared buses. |
| Propagation Delay | 4.7ns (tPLH, CL=15pF, VCC=3.3V) - Supports >100MHz bus operation with tight timing budgets. |
| 3-STATE Disable Time | tPHZ ≤ 13.0ns (CL=50pF, RL=1kΩ) - Minimizes bus turnaround latency in bidirectional data transfer. |
| Output Skew | ≤1.5ns (tOSLH/tOSHL) - Ensures deterministic timing alignment across all eight outputs. |
| Quiescent Current | ICC ≤ 40μA - Supports ultra-low static power in battery-backed or standby modes. |
Pinout & Package
74LVX244MTC uses a 20-lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153 compliant, 4.4mm body width, 0.65mm lead pitch, surface-mount compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | VCC / GND | Power supply (Pin 1) and ground (Pin 19) - Decoupling capacitor placement critical for noise suppression. |
| 2–5, 11–14 | I0–I3, I4–I7 | Eight buffered inputs - Split into two groups of four, each mapped to one 3-STATE output bank. |
| 6–9, 15–18 | O0–O3, O4–O7 | Eight 3-STATE outputs - Outputs O0–O3 respond to OE1 (Pin 12/14/16/18); O4–O7 to OE2 (Pin 3/5/7/9). |
| 12, 14, 16, 18 | OE1 | Group 1 output enable - Active-Low; controls O0–O3 simultaneously; tied together per datasheet. |
| 3, 5, 7, 9 | OE2 | Group 2 output enable - Active-Low; controls O4–O7 simultaneously; tied together per datasheet. |
Key Features
| Feature | Design Value |
|---|---|
| 5.5V-tolerant inputs | Enables direct connection to 5V microcontrollers or FPGAs without external level translators. |
| Dual independent 3-STATE control | Allows selective isolation of two 4-bit data paths-ideal for multiplexed address/data buses. |
| Guaranteed simultaneous switching noise immunity | Validated dynamic VOLP/VOLV (0.5–0.8V) ensures reliable logic thresholds during fast output transitions. |
| Low quiescent current (40μA max) | Reduces system-level standby power-critical for portable and always-on embedded devices. |
| TSSOP-20 footprint | 4.4mm × 6.5mm body enables high-density routing in space-constrained applications like SSD controllers and IoT modules. |
Applications
| Memory Address Buffering | PCI/ISA Bus Interface |
|---|---|
|
Use Scenario: Driving 32-bit address lines from a 3.3V CPU to multiple 5V SRAM chips in an industrial controller. IC Role / Device Role / Timing Role: Non-inverting voltage-translating buffer with 3-STATE isolation during bus release cycles. Use Value: Eliminates need for discrete level shifters while maintaining <1.5ns inter-output skew for setup/hold compliance. |
Use Scenario: Isolating legacy PCI add-in card signals from a 3.3V host bridge in a test instrumentation platform. IC Role / Device Role / Timing Role: Bidirectional bus transceiver buffer with group-selectable 3-STATE control for direction management. Use Value: Dual OE pins allow independent gating of address vs. data lanes, reducing contention risk during burst transfers. |
| Microcontroller I/O Expansion | Industrial PLC Backplane Driver |
|
Use Scenario: Extending GPIO count of a 3.3V ARM Cortex-M4 MCU to drive 8-channel relay module with 5V coil drivers. IC Role / Device Role / Timing Role: Level-shifting line driver with ±24mA sink/source capability per output. Use Value: Direct 5V-tolerant input allows clean sampling of external switch states; strong drive ensures fast relay actuation. |
Use Scenario: Buffering analog/digital I/O signals across modular backplane slots in a DIN-rail mounted PLC chassis. IC Role / Device Role / Timing Role: Noise-immune bus repeater with guaranteed VOLP ≤0.8V under simultaneous switching. Use Value: Meets IEC 61000-4-4 EFT immunity requirements via validated dynamic noise margins. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74LVC244APW | Lower VCC range (1.65–3.6V); higher drive (±24mA); tighter tPLH (3.5ns @ 3.3V/15pF) | Requires stricter VCC regulation; better suited for high-speed FPGA I/O banks with tight timing closure. | Prefer when propagation delay budget is <4ns and board already uses LVC-family decoupling. |
| SN74LV244ADW | Same VCC range (2.0–3.6V); identical pinout; slightly higher ICC (100μA max); no 5.5V input tolerance | Not suitable for 5V-tolerant interfaces; requires external clamping diodes if interfacing with 5V sources. | Select only in pure 3.3V-only systems where cost or second-source availability outweighs voltage translation need. |
Compared with 74LVX244MTC, the 74LVC244APW offers faster timing but sacrifices 5V input tolerance, while the SN74LV244ADW matches pinout and supply range but lacks voltage translation-making 74LVX244MTC uniquely suited for mixed-voltage bus bridging where robustness and compatibility are prioritized over marginal speed gains.
Availability
74LVX244MTC is available at Aetrix Electronics and suitable for industrial PLC backplanes, memory subsystems, microcontroller I/O expansion, and legacy bus interface designs requiring stable component supply and long-term lifecycle support.
Supply support for 74LVX244MTC 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 74LVX244MTC belongs to ON Semiconductor's legacy logic portfolio inherited from Fairchild, engineered specifically for low-voltage bus buffering with voltage translation and noise immunity in industrial and computing infrastructure.
FAQ
What is the maximum input voltage rating for 74LVX244MTC?
The 74LVX244MTC supports DC input voltages up to 5.5V regardless of VCC level, enabling safe interfacing with 5V logic families while operating from a 3.3V supply. This 5.5V tolerance is explicitly guaranteed in the Absolute Maximum Ratings and DC Electrical Characteristics tables of the official datasheet, and applies to all eight inputs (I0–I7) under continuous operation.
Does 74LVX244MTC support true bidirectional data flow?
No, the 74LVX244MTC is a unidirectional non-inverting buffer with fixed input-to-output direction (I0→O0, I1→O1, etc.). It does not contain internal direction-control circuitry or bus-switch architecture. For bidirectional applications, external control logic must manage OE1/OE2 sequencing to emulate half-duplex behavior-but the 74LVX244MTC itself only drives in one direction.
What is the recommended decoupling for 74LVX244MTC in high-speed layouts?
A 0.1μF ceramic capacitor placed within 2mm of VCC (Pin 1) and GND (Pin 19) is mandatory. For systems with multiple 74LVX244MTC devices or heavy bus switching, add a 4.7μF tantalum or polymer capacitor per 4–6 devices. The datasheet specifies that violating these decoupling guidelines risks exceeding guaranteed VOLP/VOLV noise limits during simultaneous output transitions.
Can OE1 and OE2 be tied together for single-enable operation of 74LVX244MTC?
Yes-OE1 (Pins 12,14,16,18) and OE2 (Pins 3,5,7,9) may be externally shorted and driven by a common active-low signal. This configuration converts the device into a unified octal 3-STATE buffer. The datasheet confirms this usage in the Pin Descriptions section and shows identical electrical specs for both enables, including matching tPZL/tPHZ timing.
Is 74LVX244MTC RoHS-compliant and halogen-free?
Yes, the 74LVX244MTC is manufactured in a Pb-Free (RoHS-compliant) TSSOP package per JEDEC J-STD-020B, and meets ON Semiconductor's halogen-free material definition (Br < 900 ppm, Cl < 900 ppm, total halogens < 1500 ppm). This is confirmed in the "Ordering Code" section and Package Number MTC20 description in the official datasheet.
74LVX244MTC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74LVX
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Bulk
- 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-TSSOP
74LVX244MTC FAQ
1.How can I place an order for 74LVX244MTC through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVX244MTC 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 74LVX244MTC reliable?
The price and inventory of 74LVX244MTC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVX244MTC is usually 5 days.
3.What payment methods are accepted for 74LVX244MTC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVX244MTC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVX244MTC?
74LVX244MTC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVX244MTC 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 74LVX244MTC?
For technical support, including 74LVX244MTC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVX244MTC requirements.
6.How does Aetrix verify that 74LVX244MTC is sourced from the original manufacturer or authorized distributors?
All 74LVX244MTC 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 74LVX244MTC meets industry standards.
7.What is the process for return or replacement of 74LVX244MTC?
All 74LVX244MTC units undergo pre-shipment inspection (PSI). If there is an issue with 74LVX244MTC, 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 74LVX244MTC part is unused and in its original packaging.
Return procedure for 74LVX244MTC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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