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Nexperia USA Inc. 74LVT2244DB,112
- Part No.:
- 74LVT2244DB,112
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74LVT2244DB,112.pdf
- Description:
- IC BUF NON-INVERT 3.6V 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,784
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Product details
Overview
74LVT2244DB,112 from Nexperia is a 3.3 V octal 3-state buffer/line driver with integrated 30 Ω series output termination resistors, designed for high-speed memory address and clock distribution in industrial bus systems. It features dual independent 4-bit sections (1A/1Y and 2A/2Y), two active-low output enables (1OE, 2OE), bus hold on all data inputs, and ±12 mA drive capability across -40 °C to +85 °C.
For engineers reviewing the 74LVT2244DB,112 datasheet, 74LVT2244DB,112 pinout, 74LVT2244DB,112 application, or 74LVT2244DB,112 equivalent, key selection criteria include its 30 Ω on-die termination for noise reduction, overvoltage-tolerant 5.5 V inputs, BiCMOS output stage enabling direct TTL interfacing, and IOFF power-down protection for live insertion.
Technical Context
The 74LVT2244DB,112 implements a dual 4-bit non-inverting buffer architecture with separate 3-state control per group. Its BiCMOS output stage integrates 30 Ω series resistance in both HIGH and LOW states-verified in Figure 3 of the datasheet-to dampen transmission line reflections without external components.
Bus hold circuitry maintains defined logic states on unused inputs without pull-up resistors, while IOFF functionality isolates outputs when VCC = 0 V, supporting hot-swap operation. Propagation delays are specified at 2.9 ns (typ) for both tPLH and tPHL at VCC = 3.3 V, with 3-state enable/disable times as low as 3.3 ns (tPLZ).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7 V to 3.6 V - Ensures compatibility with 3.3 V logic systems while tolerating rail variation. |
| Output Drive | ±12 mA - Sustains signal integrity driving 50 Ω transmission lines or multiple TTL loads. |
| Input Voltage Range | 0 V to 5.5 V - Enables direct interface with 5 V legacy peripherals without level shifters. |
| Propagation Delay | 2.9 ns (typ) - Supports >300 MHz bus timing in memory and clock distribution paths. |
| Termination Resistance | 30 Ω (integrated) - Eliminates need for external series resistors, reducing BOM count and PCB area. |
| Operating Temperature | -40 °C to +85 °C - Qualified for industrial ambient environments without derating. |
| Bus Hold Current | ±75 μA to ±150 μA - Actively holds floating inputs at valid logic levels, preventing metastability. |
Pinout & Package
74LVT2244DB,112 is packaged in a plastic SSOP20 (SOT339-1) package with 20 leads and 0.65 mm pitch, measuring 7.2 mm × 5.3 mm × 1.95 mm (body height). This compact surface-mount outline supports high-density routing in space-constrained industrial controllers and telecom line cards.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 19 | Active-low output enable (Group 1) | Controls 1Y0–1Y3; asserts high-impedance state when HIGH, enabling shared bus arbitration. |
| 1A0–1A3, 2–4–6–8 | Data inputs (Group 1) | Accept 3.3 V or 5 V logic; bus hold maintains state if left unconnected. |
| 1Y0–1Y3, 12–14–16–18 | Buffered outputs (Group 1) | Drive with 30 Ω series termination; ±12 mA sink/source into 50 Ω loads. |
| 2OE, 11 | Active-low output enable (Group 2) | Independent control of 2Y0–2Y3; allows asymmetric bus partitioning. |
| 2A0–2A3, 13–15–17–20 | Data inputs (Group 2) | Same input specs as Group 1; electrically isolated but share VCC/GND. |
| 2Y0–2Y3, 3–5–7–9 | Buffered outputs (Group 2) | Matched delay and drive strength to Group 1; supports parallel or split-bus topologies. |
| VCC, 20 | Power supply | 3.3 V nominal; decoupling required within 10 mm due to fast switching transients. |
| GND, 10 | Ground reference | Single ground plane connection; critical for noise suppression in terminated outputs. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 30 Ω output termination | Reduces ringing and EMI on PCB traces up to 15 cm without discrete resistors. |
| Overvoltage-tolerant inputs (5.5 V) | Enables mixed-voltage system integration without external clamping diodes. |
| Bus hold on all data inputs | Eliminates external pull-ups, cutting BOM cost and layout complexity for unused pins. |
| IOFF partial power-down | Prevents back-driving during power sequencing or board hot-swap operations. |
| Latch-up immunity (>500 mA) | Guarantees robustness against transient overcurrent events in noisy industrial settings. |
Applications
| Memory Address Buffering | PCI/PCIe Slot Interface |
|---|---|
Use Scenario: Driving address lines from a microcontroller to multiple SRAM or Flash devices on a shared bus. IC Role / Device Role / Timing Role: Non-inverting 3-state buffer with matched propagation delay across all 8 bits, ensuring setup/hold timing compliance. Use Value: Integrated 30 Ω termination suppresses reflections on parallel address traces, eliminating timing jitter and read errors at 100+ MHz. | Use Scenario: Isolating and conditioning control signals between a host CPU and add-in PCIe expansion cards. IC Role / Device Role / Timing Role: Dual-group 3-state driver enabling dynamic bus segmentation and hot-plug detection via OE control. Use Value: Bus hold prevents floating inputs during card insertion/removal, while IOFF blocks current flow when VCC is absent. |
| Industrial Backplane Clock Distribution | Legacy ISA Bus Signal Conditioning |
Use Scenario: Distributing a 50 MHz system clock to multiple FPGA or ASIC clock inputs across a 200 mm backplane. IC Role / Device Role / Timing Role: Low-skew line driver with matched output impedance, minimizing inter-channel skew and jitter accumulation. Use Value: 2.9 ns typical propagation delay and 30 Ω series termination reduce clock edge distortion, maintaining <100 ps jitter budget. | Use Scenario: Interfacing modern 3.3 V microcontrollers with legacy 5 V ISA bus peripherals in industrial PLCs. IC Role / Device Role / Timing Role: Level-translating buffer with 5.5 V tolerant inputs and 3.3 V compatible outputs, preserving signal integrity. Use Value: Direct 5 V input acceptance eliminates level-shifter ICs, reducing latency and component count in retrofit designs. |
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 | No integrated termination; 24 mA drive; 1.65–3.6 V supply | Requires external 30 Ω series resistors for noise control; higher drive suits heavier loads | Select when higher output current or wider voltage range is needed, and board space permits discrete termination. |
| 74ALVC244MTCX | 3.3 V only; no bus hold; 24 mA drive; no IOFF | Lacks bus hold and IOFF-requires external pull-ups and power sequencing care | Choose for cost-sensitive, non-hot-swap applications where input biasing and power sequencing are controlled externally. |
Compared with SN74LVC244APWR and 74ALVC244MTCX, the 74LVT2244DB,112 uniquely combines on-die 30 Ω termination, bus hold, and IOFF in a single 20-pin SSOP, reducing design risk in noise-sensitive, hot-plug-capable industrial buses.
Availability
74LVT2244DB,112 is available at Aetrix Electronics and suitable for memory subsystem buffering, industrial backplane clock distribution, and legacy bus interface applications requiring stable component supply and long-term industrial lifecycle support.
Supply support for 74LVT2244DB,112 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
Nexperia is a global semiconductor expert delivering high-performance logic, analog, and MOSFET solutions optimized for efficiency, reliability, and manufacturability in industrial and automotive markets.
The 74LVT2244DB,112 belongs to Nexperia's LVT (Low-Voltage Technology) logic family, engineered specifically for high-speed, noise-immune 3.3 V bus interfacing with integrated termination and robust I/O protection.
FAQ
What is the function of the bus hold feature on 74LVT2244DB,112 inputs?
The bus hold circuit actively maintains the last valid logic state on any unused data input (1A0–1A3, 2A0–2A3) using ±75 μA to ±150 μA feedback current. This eliminates the need for external pull-up or pull-down resistors, preventing floating inputs that could cause increased power consumption, logic glitches, or EMI in unconnected bus segments.
Can 74LVT2244DB,112 safely drive a 5 V bus?
Yes-the 74LVT2244DB,112 outputs are not 5 V tolerant in the HIGH state, but its inputs tolerate up to 5.5 V. To drive a 5 V bus, use open-drain or level-shifting topology; however, it can directly receive 5 V signals and drive 3.3 V loads. For bidirectional 5 V bus interfacing, external voltage translation is required.
How does the 30 Ω internal termination improve signal integrity?
The 30 Ω series resistor integrated into each output matches typical PCB trace impedance (40–70 Ω) when combined with load capacitance, damping reflections at the source. This reduces overshoot, undershoot, and ringing on traces up to 15 cm, improving eye diagram margins and enabling reliable operation at >100 MHz without adding discrete components or layout constraints.
Is 74LVT2244DB,112 suitable for hot-swap applications?
Yes-its IOFF circuitry disables output leakage when VCC = 0 V, and bus hold maintains input states during power removal. Combined with latch-up immunity >500 mA and ESD protection (2000 V HBM), it supports safe live insertion/extraction in modular backplanes and field-replaceable units without damaging connected circuitry.
74LVT2244DB,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74LVT
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tube
- 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-SSOP
74LVT2244DB,112 FAQ
1.How can I place an order for 74LVT2244DB,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVT2244DB,112 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 74LVT2244DB,112 reliable?
The price and inventory of 74LVT2244DB,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVT2244DB,112 is usually 5 days.
3.What payment methods are accepted for 74LVT2244DB,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVT2244DB,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVT2244DB,112?
74LVT2244DB,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVT2244DB,112 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 74LVT2244DB,112?
For technical support, including 74LVT2244DB,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVT2244DB,112 requirements.
6.How does Aetrix verify that 74LVT2244DB,112 is sourced from the original manufacturer or authorized distributors?
All 74LVT2244DB,112 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 74LVT2244DB,112 meets industry standards.
7.What is the process for return or replacement of 74LVT2244DB,112?
All 74LVT2244DB,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVT2244DB,112, 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 74LVT2244DB,112 part is unused and in its original packaging.
Return procedure for 74LVT2244DB,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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