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onsemi 74LVT2244MTCX
- Part No.:
- 74LVT2244MTCX
- Manufacturer:
- onsemi
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74LVT2244MTCX.pdf
- Description:
- IC BUF NON-INVERT 3.6V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,777
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Product details
Overview
74LVT2244MTCX from Fairchild Semiconductor is a low-voltage octal buffer/line driver with 3-STATE outputs and integrated 25Ω series output resistors, designed for memory address and clock distribution in 3.3V systems interfacing to 5V TTL buses. It delivers ±12mA drive strength, operates from 2.7V to 3.6V, and features live insertion/extraction support and power-up/down high-impedance behavior.
For engineers reviewing the 74LVT2244MTCX datasheet, pinout, applications, or equivalent options, key selection criteria include its 25Ω output series termination for overshoot/undershoot suppression, bushold-free input architecture (distinguishing it from LVTH variants), and TSSOP-20 package compatibility with high-density PCB layouts.
Technical Context
The 74LVT2244MTCX implements dual 4-bit non-inverting buffers with independent 3-STATE control (OE1/OE2), enabling selective bus driving across two groups of four outputs. Its BiCMOS fabrication achieves ABT-class speed (tPLH/tPHL ≤ 4.4ns at 3.3V) while maintaining low ICCZ (0.19mA) in disabled state.
Unlike the bushold-equipped 74LVTH2244, the 74LVT2244MTCX requires external pull-up/pull-down on unused inputs. Its 25Ω series resistors are intrinsic to each output stage-not external components-reducing signal integrity issues without increasing BOM count or layout area.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7V–3.6V - Ensures stable operation in 3.3V systems with ±0.3V supply tolerance. |
| IOH/IOL | –12mA/+12mA - Sufficient drive for terminated 50Ω transmission lines and TTL-compatible loading. |
| tPLH/tPHL | ≤4.4ns (CL=50pF) - Enables reliable timing in high-speed address/data bus applications up to ~200MHz. |
| Output Series R | 25Ω - Integrated resistor minimizes ringing and EMI on PCB traces without external components. |
| ICCZ | 0.19mA - Ultra-low quiescent current when outputs disabled, critical for power-sensitive standby modes. |
| Operating Temp | –40°C to +85°C - Qualified for industrial temperature range without derating. |
Pinout & Package
74LVT2244MTCX is housed in a 20-lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153 compliant, 4.4mm wide, with 0.65mm lead pitch and exposed pad not present. Pin 1 is marked by a beveled corner.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | OE1, OE2 | Active-Low 3-STATE enable inputs controlling outputs O0–O3 and O4–O7 respectively. |
| 2–9 | I0–I7 | Non-inverting data inputs; no bushold - require external bias if left unconnected. |
| 11–18 | O0–O7 | Buffered outputs with integrated 25Ω series resistance; drive capability ±12mA. |
| 10 | GND | Ground reference for all logic and output stages. |
| 20 | VCC | 3.3V supply rail; decoupling capacitor required within 1cm of this pin. |
Key Features
| Feature | Design Value |
|---|---|
| 3.3V Operation with 5V Input Tolerance | Accepts 0–5.5V inputs while powered from 2.7–3.6V VCC - enables mixed-voltage system interfacing without level shifters. |
| Integrated 25Ω Output Resistors | Eliminates need for eight discrete series resistors, reducing layout complexity and improving signal integrity on high-speed traces. |
| Live Insertion/Extraction Support | Power-up/down high-impedance behavior prevents bus contention during hot-swap operations in modular backplane systems. |
| Low Dynamic Power Consumption | ICCL = 5mA max (all outputs LOW) and ICCZ = 0.19mA (outputs disabled) - reduces thermal load in dense memory subsystems. |
Applications
| Memory Address Buffering | Clock Distribution Network |
|---|---|
Use Scenario: Driving address lines from a 3.3V microcontroller to multiple 5V SRAM or Flash devices on a shared bus. IC Role / Device Role / Timing Role: Non-inverting octal buffer providing voltage-level translation and fanout expansion with controlled edge rates. Use Value: 25Ω series termination suppresses reflections on parallel address traces, ensuring setup/hold margin across temperature and voltage corners. | Use Scenario: Distributing a system clock to multiple 5V logic devices (e.g., FPGA configuration ICs, legacy peripherals) from a 3.3V clock source. IC Role / Device Role / Timing Role: Low-skew (≤1.0ns) line driver maintaining signal integrity across mismatched trace lengths. Use Value: Matched tPLH/tPHL propagation delays and integrated series resistance minimize clock skew and jitter accumulation. |
| Bus Transceiver Interface | High-Density PCB Signal Conditioning |
Use Scenario: Isolating and driving bidirectional data bus segments between 3.3V processor and 5V peripheral ASICs in embedded instrumentation. IC Role / Device Role / Timing Role: Unidirectional buffer group (O0–O3/O4–O7) enabling directional control via OE1/OE2 for half-duplex bus arbitration. Use Value: Independent output enables allow partial bus activation, reducing dynamic power and crosstalk versus full-bus drivers. | Use Scenario: Routing high-speed control signals (e.g., chip select, write enable) across compact multilayer PCBs with tight spacing constraints. IC Role / Device Role / Timing Role: Compact TSSOP-20 package (4.4mm width) enables placement adjacent to BGA processors without obstructing escape routing. Use Value: Reduced board area vs. SOIC/SOP packages while maintaining same pinout compatibility and thermal performance. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC244APWR | No integrated 25Ω series resistors; CMOS process; lower IOL (24mA) but no bushold option. | Lacks built-in termination - requires external resistors for clean edges on long traces. | Select when cost sensitivity outweighs signal integrity requirements and board space permits discrete termination. |
| 74LVTH2244MTCX | Includes bushold inputs; otherwise identical pinout, timing, and output drive. | Eliminates need for external bias on unused inputs - simplifies design-in for partially used channels. | Choose when input floating states are unavoidable and system-level pull-ups cannot be guaranteed. |
Compared with SN74LVC244APWR, the 74LVT2244MTCX provides superior signal integrity out-of-the-box via integrated 25Ω resistors, while compared with 74LVTH2244MTCX, it offers lower input leakage and avoids bushold-induced current paths - advantageous in low-power sleep modes.
Availability
74LVT2244MTCX is available at Aetrix Electronics and suitable for memory subsystems, clock distribution networks, and industrial bus interfaces requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.
Supply support for 74LVT2244MTCX 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
Fairchild Semiconductor was a U.S.-based semiconductor company specializing in power management, analog, and interface ICs before its acquisition by ON Semiconductor in 2016.
The 74LVT2244MTCX belongs to Fairchild's LVT (Low-Voltage TTL) logic family, engineered for high-speed 3.3V operation with 5V-tolerant inputs - targeting memory, bus, and clock buffering in industrial and telecom infrastructure equipment.
FAQ
What is the function of the 74LVT2244MTCX in a digital system?
The 74LVT2244MTCX functions as an octal non-inverting buffer/line driver with 3-STATE outputs and integrated 25Ω series resistors. It translates and fans out 3.3V logic signals to drive 5V-tolerant loads, commonly used for memory address buffering, clock distribution, and bus interfacing where signal integrity and mixed-voltage compatibility are critical. Its dual OE pins allow grouped output control, enhancing flexibility in complex bus architectures.
Does the 74LVT2244MTCX have bushold inputs?
No, the 74LVT2244MTCX does not include bushold inputs. Unlike the 74LVTH2244 variant, it requires external pull-up or pull-down resistors on unused inputs to prevent floating states. This design choice reduces input leakage current and avoids unintended current paths during low-power modes, making it preferable in applications where input bias control is managed at the system level.
What package type is used for the 74LVT2244MTCX?
The 74LVT2244MTCX is packaged in a 20-lead Thin Shrink Small Outline Package (TSSOP), JEDEC MO-153 compliant, with 4.4mm body width and 0.65mm lead pitch. This compact surface-mount package supports high-density PCB layouts and is compatible with standard reflow soldering profiles, including lead-free assembly per JEDEC J-STD-020B.
Can the 74LVT2244MTCX drive 50Ω transmission lines directly?
Yes, the 74LVT2244MTCX can drive 50Ω transmission lines directly due to its integrated 25Ω series output resistors. When combined with typical PCB trace impedance (~50Ω), this forms a near-impedance-matched source termination, significantly reducing overshoot, undershoot, and ringing. This eliminates the need for eight discrete series resistors, simplifying layout and improving signal fidelity in high-speed digital interconnects.
What is the maximum operating temperature range for the 74LVT2244MTCX?
The 74LVT2244MTCX is rated for industrial operation from –40°C to +85°C. This temperature range is validated under recommended conditions (VCC = 2.7V–3.6V), ensuring full functionality-including propagation delay, drive strength, and 3-STATE leakage-across the entire span without derating. It meets JEDEC standards for reliability in demanding embedded and infrastructure applications.
74LVT2244MTCX Specifications
- Product attributes
- Attribute value
- Manufacturer:
- onsemi
- Series:
- 74LVT
- Package/Case:
- 20-TSSOP (0.173", 4.40mm 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:
- 12mA, 12mA
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
74LVT2244MTCX FAQ
1.How can I place an order for 74LVT2244MTCX through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVT2244MTCX 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 74LVT2244MTCX reliable?
The price and inventory of 74LVT2244MTCX are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVT2244MTCX is usually 5 days.
3.What payment methods are accepted for 74LVT2244MTCX?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVT2244MTCX transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVT2244MTCX?
74LVT2244MTCX orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVT2244MTCX 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 74LVT2244MTCX?
For technical support, including 74LVT2244MTCX datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVT2244MTCX requirements.
6.How does Aetrix verify that 74LVT2244MTCX is sourced from the original manufacturer or authorized distributors?
All 74LVT2244MTCX 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 74LVT2244MTCX meets industry standards.
7.What is the process for return or replacement of 74LVT2244MTCX?
All 74LVT2244MTCX units undergo pre-shipment inspection (PSI). If there is an issue with 74LVT2244MTCX, 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 74LVT2244MTCX part is unused and in its original packaging.
Return procedure for 74LVT2244MTCX:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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