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Nexperia USA Inc. 74LVT244BD,118
- Part No.:
- 74LVT244BD,118
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74LVT244BD,118.pdf
- Description:
- IC BUFFER NON-INVERT 3.6V 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,000
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Product details
Overview
74LVT244BD,118 from Nexperia is an 8-bit 3-state octal buffer/line driver operating at 3.3 V supply, featuring dual independent output enables (1OE, 2OE), ±64 mA/−32 mA drive capability, and overvoltage-tolerant inputs up to 5.5 V. It supports mixed-voltage interfacing between 3.3 V logic and legacy 5 V buses in backplane or motherboard I/O expansion.
For engineers reviewing the 74LVT244BD,118 datasheet, 74LVT244BD,118 pinout, 74LVT244BD,118 application, or 74LVT244BD,118 equivalent, this device is selected for high-drive, low-latency bus buffering where bus hold eliminates external pull-ups, IOFF enables live insertion, and 20-pin SO20 packaging ensures compatibility with industrial PCB layouts.
Technical Context
This BiCMOS buffer implements two independent 4-bit groups-Group 1 (1A0–1A3 → 1Y0–1Y3) and Group 2 (2A0–2A3 → 2Y0–2Y3)-each controlled by its own active-low enable (1OE, 2OE). Outputs enter high-impedance state when respective OE is HIGH, enabling bidirectional bus sharing without contention.
Bus hold circuitry maintains stable logic states on unused inputs without external resistors, while IOFF protection limits leakage current during power-down. Propagation delays are as low as 1.1 ns (tPLH) and 1.3 ns (tPHL) at 3.3 V, supporting >200 MHz data rates in synchronous systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7 V to 3.6 V - Ensures robust operation across 3.3 V rail tolerances and brown-out conditions. |
| Input Voltage Range | 0 V to 5.5 V - Enables direct interface with 5 V TTL systems without level shifters. |
| Output Drive | +64 mA / −32 mA - Sinks sufficient current for driving multiple CMOS loads or terminated transmission lines. |
| Propagation Delay | 1.1 ns (LOW→HIGH), 1.3 ns (HIGH→LOW) - Supports sub-5 ns cycle times in high-speed address/data latching. |
| Bus Hold Current | ±75 μA to ±140 μA - Actively retains input logic state without external biasing components. |
| IOFF Leakage | ±100 μA at VCC = 0 V - Prevents back-powering of powered-down sections during hot-swap operations. |
| Operating Temperature | −40 °C to +85 °C - Qualified for industrial-grade embedded control and communications equipment. |
Pinout & Package
74LVT244BD,118 is housed in a plastic small outline package (SO20, SOT163-1) with 20 leads and 7.5 mm body width. Pin 1 is marked by a bevelled corner or dot; pin numbering follows standard counter-clockwise sequence from top-left.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low output enables - independently disable Group 1 or Group 2 outputs to isolate bus segments. |
| 2, 4, 6, 8 | 1A0–1A3 | Data inputs for first 4-bit buffer group - routed to corresponding 1Y outputs when 1OE = LOW. |
| 11, 13, 15, 17 | 2A0–2A3 | Data inputs for second 4-bit buffer group - routed to corresponding 2Y outputs when 2OE = LOW. |
| 12, 14, 16, 18 | 1Y0–1Y3 | 3-state outputs for Group 1 - high-impedance when 1OE = HIGH; driven by 1A0–1A3 otherwise. |
| 3, 5, 7, 9 | 2Y0–2Y3 | 3-state outputs for Group 2 - high-impedance when 2OE = HIGH; driven by 2A0–2A3 otherwise. |
| 10 | GND | Ground reference - common return path for all internal logic and output drivers. |
| 20 | VCC | 3.3 V supply - powers BiCMOS output stage and input buffers; decoupling required within 10 mm. |
Key Features
| Feature | Design Value |
|---|---|
| Dual independent 3-state enables | 1OE and 2OE allow selective isolation of two 4-bit data paths on shared bus infrastructure. |
| Overvoltage-tolerant inputs | Withstands 5.5 V inputs while powered from 3.3 V - eliminates need for external clamping diodes or translators. |
| Integrated bus hold | Maintains valid logic levels on floating inputs using ~100 μA internal feedback - removes requirement for external pull-up/down resistors. |
| IOFF partial power-down | Blocks current flow between powered and unpowered sections during hot-swap or standby - critical for modular backplanes. |
| BiCMOS output architecture | Combines bipolar speed and CMOS efficiency - achieves <3.5 ns propagation delay with 64 mA sink capability. |
Applications
| Backplane Data Buffering | Industrial I/O Expansion Module |
|---|---|
|
Use Scenario: Buffering parallel address/data lines between CPU module and peripheral slots in a 19-inch rack-mounted controller. IC Role / Device Role / Timing Role: 3-state octal buffer isolating shared bus segments during slot arbitration; enables simultaneous access to multiple I/O cards. Use Value: Dual OE pins allow per-slot enable control, while bus hold prevents glitches during card insertion/removal. |
Use Scenario: Interfacing microcontroller GPIOs to 5 V industrial sensors and actuators via isolated digital I/O board. IC Role / Device Role / Timing Role: Level-shifting buffer translating 3.3 V MCU outputs to 5 V-compatible signals without external voltage translators. Use Value: 5.5 V input tolerance and 64 mA sink capability directly drive relay coils and optocoupler LEDs. |
| Memory Address Latching | Legacy Bus Interface Adapter |
|
Use Scenario: Driving address lines to SRAM or Flash memory in a 3.3 V embedded system with tight timing budgets. IC Role / Device Role / Timing Role: Low-latency buffer ensuring setup/hold margins are met at >200 MHz clock rates. Use Value: Sub-2 ns propagation delay and 8 pF output capacitance minimize signal distortion on stubbed traces. |
Use Scenario: Adapting modern FPGA I/O banks to legacy ISA or PCI bus protocols requiring 5 V signaling. IC Role / Device Role / Timing Role: Bidirectional bus transceiver replacement in non-multiplexed mode - used as unidirectional driver with OE control. Use Value: IOFF and live-insertion support allow field-replaceable adapter modules without system shutdown. |
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 |
|---|---|---|---|
| 74LVT244BPW,118 | TSSOP20 package (4.4 mm width); identical electrical specs and pinout. | Better thermal performance and higher density layout; requires finer-pitch reflow profile. | Select for space-constrained designs where SO20 footprint is unavailable. |
| SN74LVC244APWR | Lower drive (±24 mA); 1.65–3.6 V supply; no bus hold or IOFF. | Suitable only for low-load, single-supply 3.3 V systems; lacks hot-swap capability. | Choose only if cost sensitivity outweighs drive strength and mixed-voltage requirements. |
Compared with 74LVT244BD,118, the TSSOP variant offers identical functionality in a smaller footprint but demands tighter assembly control, while the LVC alternative sacrifices drive, bus hold, and IOFF for lower cost and power - making it unsuitable for 5 V interfacing or live-insertion use cases.
Availability
74LVT244BD,118 is available at Aetrix Electronics and suitable for industrial control systems, backplane interconnects, and legacy bus adapters requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for 74LVT244BD,118 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 specializing in high-performance logic, discrete, and MOSFET solutions, with core competencies in reliability, efficiency, and manufacturability for industrial and automotive markets.
The 74LVT series delivers high-speed, high-drive 3.3 V logic optimized for mixed-voltage system interfacing, particularly where legacy 5 V subsystems coexist with modern low-voltage controllers.
FAQ
What is the maximum input voltage the 74LVT244BD,118 can tolerate?
The device accepts input voltages up to +5.5 V regardless of VCC level, enabling direct connection to 5 V TTL or CMOS outputs without level-shifting circuitry. This overvoltage tolerance is guaranteed across the full operating temperature range (−40 °C to +85 °C) and does not require external clamping components.
Does the 74LVT244BD,118 support hot-plug or live insertion?
Yes - the integrated IOFF circuitry disables input/output leakage paths when VCC = 0 V, preventing back-driving of powered sections during card insertion or removal. Combined with bus hold, this allows safe live insertion into active backplanes without disrupting system operation.
How does bus hold eliminate the need for external pull-up resistors?
Each input features an internal feedback network that sources or sinks ~100 μA to maintain the last-valid logic state when left floating. This holds unused or unterminated inputs at defined HIGH or LOW levels, removing risk of metastability and eliminating design overhead for discrete pull-up/pull-down components.
Can both output enable pins (1OE and 2OE) be tied together?
Yes - tying 1OE and 2OE simplifies control to a single enable signal, converting the device into a unified 8-bit buffer. However, doing so forfeits independent group isolation; for applications requiring segmented bus control (e.g., multi-slot arbitration), separate OE routing is mandatory.
74LVT244BD,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74LVT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- 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:
- 32mA, 64mA
- Voltage - Supply:
- 2.7V ~ 3.6V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SO
74LVT244BD,118 FAQ
1.How can I place an order for 74LVT244BD,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVT244BD,118 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 74LVT244BD,118 reliable?
The price and inventory of 74LVT244BD,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVT244BD,118 is usually 5 days.
3.What payment methods are accepted for 74LVT244BD,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVT244BD,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVT244BD,118?
74LVT244BD,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVT244BD,118 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 74LVT244BD,118?
For technical support, including 74LVT244BD,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVT244BD,118 requirements.
6.How does Aetrix verify that 74LVT244BD,118 is sourced from the original manufacturer or authorized distributors?
All 74LVT244BD,118 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 74LVT244BD,118 meets industry standards.
7.What is the process for return or replacement of 74LVT244BD,118?
All 74LVT244BD,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVT244BD,118, 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 74LVT244BD,118 part is unused and in its original packaging.
Return procedure for 74LVT244BD,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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