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Nexperia USA Inc. 74LVTH244BDB,118
- Part No.:
- 74LVTH244BDB,118
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74LVTH244BDB,118.pdf
- Description:
- IC BUF NON-INVERT 3.6V 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,669
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Product details
Overview
74LVTH244BDB,118 from Nexperia is a 3.3 V octal buffer/line driver with dual 3-state outputs, designed for bidirectional bus interfacing in mixed-voltage systems. It features two independent output-enable inputs (1OE, 2OE), bus-hold inputs eliminating external pull-ups, ±32 mA/±64 mA drive capability, and 5.5 V-tolerant inputs. It operates across -40 °C to +85 °C and supports live insertion in backplane or hot-swap applications.
For engineers reviewing the 74LVTH244BDB,118 datasheet, 74LVTH244BDB,118 pinout, 74LVTH244BDB,118 application, or 74LVTH244BDB,118 equivalent, key selection criteria include 3-state timing (tPZH ≤ 4.5 ns), overvoltage-tolerant input compatibility with 5 V buses, BiCMOS output drive strength, and bus-hold functionality for floating-input robustness.
Technical Context
This device implements an octal non-inverting buffer architecture with two independent 4-bit sections, each controlled by its own active-low output enable (1OE for Y0–Y3, 2OE for Y0'–Y3'). The bus-hold circuitry actively maintains logic state on unused inputs without external resistors, reducing board space and BOM count.
Its BiCMOS process enables TTL-level compatibility at 3.3 V supply while tolerating 5.5 V inputs - enabling direct interface between 3.3 V logic and legacy 5 V subsystems. IOFF protection ensures low leakage (<100 μA) during partial power-down, supporting system-level power sequencing requirements.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7 V to 3.6 V - ensures stable operation across industrial-grade voltage rails and brown-out margins |
| Input Voltage Range | 0 V to 5.5 V - allows safe connection to 5 V buses without level shifters |
| Output Drive | +64 mA sink / -32 mA source - drives heavy capacitive loads or multiple TTL inputs directly |
| Propagation Delay | tPLH/tPHL ≤ 3.5 ns @ 3.3 V - supports >100 MHz bus toggle rates in high-speed digital interfaces |
| Bus Hold Current | IBHL = 75–130 μA, IBHH = -140 to -75 μA - actively retains logic state on unconnected inputs |
| IOFF Leakage | ±100 μA @ VCC = 0 V - prevents back-driving powered-down sections during hot-plug events |
| ESD Rating | HBM > 2000 V, CDM > 1000 V - meets industrial handling and assembly reliability requirements |
Pinout & Package
74LVTH244BDB,118 is packaged in a plastic small outline package (SO20, SOT163-1) with 20 leads and 7.5 mm body width, optimized for automated PCB assembly and thermal dissipation in dense layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low output enables - independently disable Group 1 (pins 12–18) or Group 2 (pins 3–9) outputs |
| 2, 4, 6, 8 | 1A0–1A3 | Data inputs for first 4-bit buffer section - accept 0–5.5 V signals with bus-hold retention |
| 11, 13, 15, 17 | 2A0–2A3 | Data inputs for second 4-bit buffer section - electrically isolated from Group 1 inputs |
| 12, 14, 16, 18 | 1Y0–1Y3 | 3-state outputs for Group 1 - driven only when 1OE = LOW; high-impedance otherwise |
| 3, 5, 7, 9 | 2Y0–2Y3 | 3-state outputs for Group 2 - driven only when 2OE = LOW; high-impedance otherwise |
| 10 | GND | Ground reference - common return path for all I/O and internal logic |
| 20 | VCC | 3.3 V supply - powers internal BiCMOS circuitry and defines logic thresholds |
Key Features
| Feature | Design Value |
|---|---|
| Dual 4-bit 3-state control | Independent OE pins allow selective isolation of two bus segments - critical for multi-master arbitration |
| 5.5 V-tolerant inputs | Enables direct connection to 5 V logic without external level translators - reduces component count and signal delay |
| Bus-hold inputs | Eliminates need for 10 kΩ pull-up/down resistors on unused A0–A3 pins - improves layout density and EMI immunity |
| Live-insertion support | IOFF circuitry prevents current backflow during hot-plug - protects powered subsystems during board replacement |
| BiCMOS output stage | Delivers +64 mA sink current for driving terminated transmission lines or multiple fanouts - avoids external drivers |
Applications
| PCI Bus Interface | Industrial Backplane Interconnect |
|---|---|
Use Scenario: Isolating PCI add-in card data lines from motherboard bus during configuration or fault conditions. IC Role / Device Role / Timing Role: Bidirectional 3-state buffer providing direction-controlled data isolation with sub-5 ns enable/disable timing. Use Value: Prevents bus contention during hot-plug events while maintaining signal integrity across 32-bit parallel paths. | Use Scenario: Level-shifting and buffering between 3.3 V controller modules and 5 V legacy I/O cards in programmable logic controllers. IC Role / Device Role / Timing Role: Voltage-tolerant octal driver enabling seamless interoperation without discrete level translators. Use Value: Reduces BOM cost by 8× per channel versus discrete resistor-transistor solutions and eliminates associated timing skew. |
| Memory Expansion Subsystem | Test Equipment Signal Routing |
Use Scenario: Driving address/data lines from a 3.3 V FPGA to multiple SRAM chips operating at 5 V. IC Role / Device Role / Timing Role: High-drive buffer with bus-hold ensuring valid logic states during memory access arbitration windows. Use Value: Guarantees setup/hold timing margins under worst-case capacitive loading (≤ 50 pF) with <3.5 ns propagation delay. | Use Scenario: Multiplexing DUT signals through automated test fixtures where input pins may float between test sequences. IC Role / Device Role / Timing Role: Input-stabilizing buffer with automatic bus-hold retention and fast 3-state switching. Use Value: Eliminates false triggering due to floating inputs and enables deterministic signal routing with <4.5 ns enable-to-output delay. |
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 | Lower drive (+24 mA/-24 mA), 1.65–3.6 V supply, no bus-hold | Requires external pull-ups for unused inputs; unsuitable for hot-swap or floating-bus environments | Select when cost sensitivity outweighs drive strength and bus-hold needs |
| 74ALVCH162244DGGR | 16-bit, 3.3 V only, higher speed (tPD ≤ 2.8 ns), no 5 V tolerance | Lacks 5.5 V input tolerance - cannot interface directly with 5 V systems without level shifters | Select for high-density 16-bit bus buffering where voltage compatibility is strictly 3.3 V |
Compared with SN74LVC244APWR and 74ALVCH162244DGGR, the 74LVTH244BDB,118 uniquely combines 5.5 V input tolerance, ±64 mA drive, and integrated bus-hold - making it the only choice for robust 3.3 V/5 V mixed-signal backplane interfaces requiring zero-external-component input stabilization.
Availability
74LVTH244BDB,118 is available at Aetrix Electronics and suitable for industrial backplane interconnect, memory expansion subsystems, PCI bus isolation, and automated test equipment signal routing requiring stable component supply across extended temperature ranges.
Supply support for 74LVTH244BDB,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 delivering high-performance logic, analog, and MOSFET solutions with focus on efficiency, reliability, and miniaturization for industrial and consumer applications.
The 74LVTH series targets high-speed, mixed-voltage digital interfacing - specifically engineered to bridge 3.3 V logic domains with legacy 5 V infrastructure while minimizing external components and power consumption.
FAQ
What is the maximum input voltage the 74LVTH244BDB,118 can tolerate?
The device accepts input voltages up to +5.5 V regardless of VCC level, verified per datasheet Table 4 (VI max = +7.0 V with clamping current observed). This enables direct connection to 5 V buses without level-shifting circuitry, provided input clamp current remains within ±50 mA limits.
Does the 74LVTH244BDB,118 require external pull-up resistors on unused inputs?
No. Its integrated bus-hold circuitry actively maintains the last-valid logic state on all data inputs (1A0–1A3, 2A0–2A3) without external components. Typical bus-hold currents are +75 to +130 μA for LOW and -75 to -140 μA for HIGH, sufficient to override noise-induced transitions.
Can the 74LVTH244BDB,118 be used in hot-swap applications?
Yes. Its IOFF circuitry ensures power-off leakage stays within ±100 μA when VCC = 0 V and inputs/outputs range from 0 V to 4.5 V, preventing back-current flow into powered subsystems. Combined with live-insertion-rated packaging and ESD hardening, it supports safe board replacement in active systems.
What is the typical propagation delay from input to output at 3.3 V?
At VCC = 3.3 V and Tamb = 25 °C, typical tPLH and tPHL are 1.9 ns and 2.0 ns respectively (Table 7). Worst-case values across -40 °C to +85 °C and 3.0–3.6 V are ≤3.5 ns, supporting reliable operation in 100+ MHz digital buses with tight timing budgets.
74LVTH244BDB,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74LVTH
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Cut Tape (CT)
- 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:
- 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-SSOP
74LVTH244BDB,118 FAQ
1.How can I place an order for 74LVTH244BDB,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVTH244BDB,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 74LVTH244BDB,118 reliable?
The price and inventory of 74LVTH244BDB,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVTH244BDB,118 is usually 5 days.
3.What payment methods are accepted for 74LVTH244BDB,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVTH244BDB,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVTH244BDB,118?
74LVTH244BDB,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVTH244BDB,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 74LVTH244BDB,118?
For technical support, including 74LVTH244BDB,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVTH244BDB,118 requirements.
6.How does Aetrix verify that 74LVTH244BDB,118 is sourced from the original manufacturer or authorized distributors?
All 74LVTH244BDB,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 74LVTH244BDB,118 meets industry standards.
7.What is the process for return or replacement of 74LVTH244BDB,118?
All 74LVTH244BDB,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVTH244BDB,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 74LVTH244BDB,118 part is unused and in its original packaging.
Return procedure for 74LVTH244BDB,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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