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Nexperia USA Inc. 74LVT240DB,118
- Part No.:
- 74LVT240DB,118
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74LVT240DB,118.pdf
- Description:
- IC BUFFER INVERT 3.6V 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:1,862
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Product details
Overview
74LVT240DB,118 from Nexperia is an octal inverting 3-state buffer/line driver operating at 3.3 V nominal supply, featuring dual independent output-enable controls (1OE, 2OE), ±32 mA/±64 mA drive capability, bus-hold inputs eliminating external pull-ups, and 5.5 V-tolerant inputs for mixed-voltage interfacing - used in high-speed backplane and memory address/data bus buffering.
For engineers reviewing the 74LVT240DB,118 datasheet, 74LVT240DB,118 pinout, 74LVT240DB,118 application, or 74LVT240DB,118 equivalent, key selection criteria include 3-state timing (tPZH ≤ 5.2 ns), overvoltage input tolerance, BiCMOS output drive strength, and SO20 package compatibility with legacy 74-series footprint layouts.
Technical Context
The 74LVT240DB,118 implements two independent 4-bit inverting buffer sections, each controlled by a dedicated active-low output enable (1OE for Y0–Y3, 2OE for Y0–Y3 of second group). Its BiCMOS architecture enables TTL-compatible input thresholds while delivering rail-to-rail CMOS-level outputs.
Bus-hold circuitry actively maintains logic state on unused inputs without external resistors, and IOFF protection ensures minimal leakage during partial power-down. Propagation delays are specified down to 1.0 ns typical (tPLH/tPHL at VCC = 3.3 V), with 3-state transition times under 5.6 ns.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 2.7 V to 3.6 V - supports stable operation across industrial 3.3 V rail tolerances |
| Input Voltage Range | 0 V to 5.5 V - enables direct interface with 5 V logic without level shifters |
| Output Drive | +64 mA sink / –32 mA source - drives heavy capacitive loads and multiple TTL inputs |
| Propagation Delay | 1.0–4.3 ns (typ/max at 3.3 V) - meets sub-5 ns timing budgets in high-speed bus applications |
| 3-State Enable Time | tPZH ≤ 5.2 ns - ensures fast bus release for time-critical multiplexing |
| Operating Temperature | –40 °C to +85 °C - qualified for industrial ambient environments |
| ESD Protection | HBM > 2000 V, CDM > 1000 V - robust handling in automated assembly and field service |
Pinout & Package
74LVT240DB,118 is housed in a plastic small outline package (SO20, SOT163-1) with 20 leads and 7.5 mm body width, compatible with standard SOIC-20 footprints and reflow soldering profiles.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low output enables - independently control first/second group of four 3-state outputs |
| 2, 4, 6, 8 | 1A0–1A3 | Data inputs for first inverting buffer group - drive corresponding 1Y0–1Y3 outputs |
| 11, 13, 15, 17 | 2A0–2A3 | Data inputs for second inverting buffer group - drive corresponding 2Y0–2Y3 outputs |
| 18, 16, 14, 12 | 1Y0–1Y3 | Inverted buffered outputs (group 1) - high-impedance when 1OE = HIGH |
| 9, 7, 5, 3 | 2Y0–2Y3 | Inverted buffered outputs (group 2) - high-impedance when 2OE = HIGH |
| 10 | GND | Ground reference - common return for all signals and power |
| 20 | VCC | 3.3 V supply input - powers internal BiCMOS circuitry and output stages |
Key Features
| Feature | Design Value |
|---|---|
| Dual 4-bit 3-state control | Independent 1OE/2OE pins allow selective activation of two buffer banks - simplifies bus arbitration in multi-master systems |
| Bus-hold inputs | Eliminates need for 10 kΩ external pull-up/pull-down resistors on unused A0–A3 pins - reduces BOM count and board area |
| 5.5 V-tolerant inputs | Accepts 5 V logic levels while powered from 3.3 V - enables seamless interfacing with legacy 5 V peripherals |
| IOFF partial power-down | Prevents current flow between powered/unpowered sections when VCC = 0 V - protects downstream circuits during hot-swap |
| Live insertion/extraction support | Guaranteed no latch-up or damage during hot-plug operations - validated per JESD78 Class II Level B (>500 mA) |
Applications
| Memory Address Buffering | Backplane Data Bus Interface |
|---|---|
Use Scenario: Driving address lines from a 32-bit microcontroller to multiple SRAM/Flash devices sharing a common address bus. IC Role / Device Role / Timing Role: Inverting 3-state buffer isolating controller outputs and enabling time-multiplexed access to memory chips. Use Value: Dual OE control allows interleaved addressing cycles; 4.3 ns max propagation delay ensures setup/hold timing compliance at 100 MHz bus rates. |
Use Scenario: Interfacing a 3.3 V FPGA I/O bank to a 5 V legacy backplane carrying parallel data and control signals. IC Role / Device Role / Timing Role: Level-translating octal buffer providing bidirectional signal integrity and bus contention prevention via 3-state control. Use Value: 5.5 V input tolerance eliminates external level shifters; ±64 mA drive sustains signal integrity over 15 cm PCB traces with 50 pF load. |
| Industrial PLC I/O Expansion | Test Equipment Signal Conditioning |
Use Scenario: Expanding digital I/O capacity of a programmable logic controller using modular daughterboards with shared data buses. IC Role / Device Role / Timing Role: Octal inverting buffer with bus-hold maintaining valid logic states on unconnected inputs during module hot-swap. Use Value: Bus-hold eliminates floating inputs during insertion/removal; IOFF protection prevents backfeeding into unpowered modules. |
Use Scenario: Conditioning low-voltage logic signals from a DUT before routing to high-impedance measurement equipment inputs. IC Role / Device Role / Timing Role: Signal amplifier and isolation buffer preventing loading effects and ground loop interference. Use Value: High sink/source drive (64 mA/32 mA) drives 50 Ω coaxial cables; 2.5 ns typical tPLH preserves edge fidelity for <10 ns pulse testing. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal inverting 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC240APWR | Lower drive (±24 mA), 1.65–3.6 V supply, no bus-hold, no 5.5 V input tolerance | Suitable only for pure 3.3 V systems with light loads and externally terminated inputs | Select when cost sensitivity outweighs mixed-voltage interface needs and bus-hold is implemented externally |
| 74ALVT240MTCX | Higher speed (tPLH ≤ 3.2 ns), same 2.7–3.6 V range, but no IOFF or bus-hold; requires external pull-ups | Better for ultra-high-speed timing-critical paths where power-down safety is secondary | Choose only if sub-3.5 ns propagation is mandatory and system design accommodates external termination |
Compared with SN74LVC240APWR and 74ALVT240MTCX, the 74LVT240DB,118 uniquely combines 5.5 V input tolerance, integrated bus-hold, and IOFF protection - making it the only option among the three that safely interfaces 3.3 V controllers to 5 V buses without external components or risk of backfeed during partial power loss.
Availability
74LVT240DB,118 is available at Aetrix Electronics and suitable for industrial PLC backplanes, memory subsystems, test instrumentation, and FPGA-based embedded controllers requiring stable component supply, long-term lifecycle assurance, and consistent SO20 packaging.
Supply support for 74LVT240DB,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, analog, and discrete components, with manufacturing rooted in process innovation and automotive-grade reliability standards.
The 74LVT240 belongs to Nexperia's LVT (Low-Voltage TTL) logic family, engineered for high-speed 3.3 V bus interfacing in industrial and communications infrastructure where mixed-voltage compatibility and robust ESD performance are critical.
FAQ
What is the maximum clock frequency supported by the 74LVT240DB,118?
The 74LVT240DB,118 does not operate as a clocked device - it is an asynchronous buffer with propagation delay (tPLH/tPHL) of 1.0–4.3 ns. Its usable data rate depends on system timing margins; for a 10 ns minimum pulse width, it reliably supports up to 50 MHz toggle rates on input signals, assuming proper PCB layout and load capacitance ≤ 50 pF.
Can 74LVT240DB,118 be used with a 2.5 V supply?
No - the 74LVT240DB,118 has a minimum recommended supply voltage of 2.7 V per Table 5. Operation below 2.7 V risks undefined logic thresholds, increased propagation delay, and failure to meet output drive specifications (e.g., VOH ≥ 2.0 V at VCC = 3.0 V). It is not characterized or guaranteed for 2.5 V operation.
How does bus-hold functionality behave during power-up?
Bus-hold activates only after VCC reaches ~1.5 V and remains functional across the full –40 °C to +85 °C range. During power-up, inputs float until VCC crosses the bus-hold enable threshold (~1.2 V), then latch to their last valid state. No external RC network is needed - the feature is fully integrated and self-enabling.
Is the 74LVT240DB,118 pin-compatible with older 74LS240 devices?
No - although both are octal inverting buffers, the 74LVT240DB,118 uses SO20 (SOT163-1) with different pin mapping: 1OE/2OE occupy pins 1/19, whereas 74LS240 places OE on pin 1 only. Additionally, LVT supports 3.3 V operation and 5.5 V-tolerant inputs; LS requires 5 V and lacks bus-hold or IOFF.
74LVT240DB,118 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74LVT
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- Buffer, 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
74LVT240DB,118 FAQ
1.How can I place an order for 74LVT240DB,118 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVT240DB,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 74LVT240DB,118 reliable?
The price and inventory of 74LVT240DB,118 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVT240DB,118 is usually 5 days.
3.What payment methods are accepted for 74LVT240DB,118?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVT240DB,118 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVT240DB,118?
74LVT240DB,118 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVT240DB,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 74LVT240DB,118?
For technical support, including 74LVT240DB,118 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVT240DB,118 requirements.
6.How does Aetrix verify that 74LVT240DB,118 is sourced from the original manufacturer or authorized distributors?
All 74LVT240DB,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 74LVT240DB,118 meets industry standards.
7.What is the process for return or replacement of 74LVT240DB,118?
All 74LVT240DB,118 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVT240DB,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 74LVT240DB,118 part is unused and in its original packaging.
Return procedure for 74LVT240DB,118:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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