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Nexperia USA Inc. 74LVT240DB,112
- Part No.:
- 74LVT240DB,112
- Manufacturer:
- Nexperia USA Inc.
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74LVT240DB,112.pdf
- Description:
- IC BUFFER INVERT 3.6V 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,403
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Product details
Overview
74LVT240DB,112 from Nexperia is an 8-bit inverting 3-state buffer/line driver operating at 3.3 V supply, featuring dual independent output enables (1OE, 2OE), ±32 mA/±64 mA drive capability, bus hold inputs eliminating external pull-ups, and 5.5 V-tolerant inputs. It serves as a level-shifting, noise-immune bus interface in backplane and motherboard data routing applications.
For engineers reviewing the 74LVT240DB,112 datasheet, 74LVT240DB,112 pinout, 74LVT240DB,112 application, or 74LVT240DB,112 equivalent, this device is selected for high-speed 3.3 V–5 V mixed-voltage system interfacing where bus contention control, live insertion support, and low static current (<0.19 mA) are required.
Technical Context
The 74LVT240DB,112 implements two independent 4-bit inverting buffer sections, each controlled by its own active-low output enable (1OE for Y0–Y3, 2OE for Y4–Y7). Its BiCMOS architecture delivers TTL-compatible input thresholds and rail-to-rail output swing while maintaining sub-5 ns propagation delay at 3.3 V.
Bus hold circuitry actively maintains unused input states without external resistors, and IOFF protection ensures near-zero leakage during power-down. The device supports hot-plug operation via power-up 3-state behavior and 5 V-tolerant inputs, enabling direct connection to legacy 5 V buses without level shifters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply voltage | 2.7 V to 3.6 V - Ensures stable operation across industrial-grade 3.3 V rail tolerances. |
| Input voltage tolerance | Up to 5.5 V - Allows direct interfacing with 5 V logic without external clamping or translation. |
| Output drive (LOW) | 64 mA - Sinks sufficient current to drive multiple TTL loads or terminated transmission lines. |
| Output drive (HIGH) | −32 mA - Sources current compatible with standard CMOS/TTL fan-out requirements. |
| Propagation delay | 4.3 ns max (VCC = 3.3 V) - Enables reliable operation in >100 MHz bus systems with timing margin. |
| Bus hold current | ±75 μA to ±150 μA - Maintains valid logic state on floating inputs without external components. |
| IOFF leakage | ±100 μA max (VCC = 0 V) - Prevents back-driving of powered subsystems during partial power-down. |
| Operating temperature | −40 °C to +85 °C - Qualified for industrial ambient environments without derating. |
Pinout & Package
74LVT240DB,112 is housed in a SO20 (SOT163-1) plastic small outline package with 20 leads and 7.5 mm body width, optimized for automated assembly and thermal dissipation in dense PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low output enables - Independently disable Group A (pins 18,16,14,12) or Group B (pins 9,7,5,3). |
| 2, 4, 6, 8 | 1A0–1A3 | Inverting data inputs for first 4-bit section - Drive corresponding 1Y outputs with polarity inversion. |
| 11, 13, 15, 17 | 2A0–2A3 | Inverting data inputs for second 4-bit section - Drive corresponding 2Y outputs with polarity inversion. |
| 18, 16, 14, 12 | 1Y0–1Y3 | Inverted buffered outputs (Group A) - High-impedance when 1OE = HIGH; logic-inverted relative to 1A0–1A3. |
| 9, 7, 5, 3 | 2Y0–2Y3 | Inverted buffered outputs (Group B) - High-impedance when 2OE = HIGH; logic-inverted relative to 2A0–2A3. |
| 10 | GND | Ground reference - Return path for all internal currents and noise filtering anchor point. |
| 20 | VCC | 3.3 V supply - Powers BiCMOS output stage and input conditioning circuits; decoupling required within 1 cm. |
Key Features
| Feature | Design Value |
|---|---|
| Dual 4-bit 3-state control | Independent 1OE/2OE pins allow selective isolation of two bus segments without global disable. |
| Bus hold inputs | Eliminates need for 10 kΩ pull-up/down resistors on unused inputs, reducing BOM count and board space. |
| 5.5 V-tolerant inputs | Direct connection to 5 V systems without level shifters or voltage dividers, simplifying mixed-voltage designs. |
| Live insertion support | Power-up 3-state and IOFF circuitry prevent bus contention during hot-swap events in modular backplanes. |
| BiCMOS output stage | Combines bipolar speed and CMOS low static power, achieving <5 ns delay with <0.19 mA ICC at 3.3 V. |
Applications
| Industrial Backplane Interface | Memory Module Data Buffering |
|---|---|
|
Use Scenario: Isolating and driving address/data lines between 3.3 V controller and 5 V peripheral slots in modular PLC chassis. IC Role / Device Role / Timing Role: Inverting 3-state buffer providing bidirectional signal integrity, bus contention prevention, and voltage-level compatibility. Use Value: Enables plug-and-play expansion without redesigning slot-level power or logic families; bus hold prevents glitches during hot-swap. |
Use Scenario: Buffering DDR SDRAM DQ/DQS signals between 3.3 V memory controller and 5 V registered DIMM modules. IC Role / Device Role / Timing Role: Low-skew inverting driver with precise tPLH/tPHL matching to maintain setup/hold timing margins. Use Value: Delivers 4.3 ns max propagation delay and 64 mA sink strength to meet JEDEC DDR-200 timing and drive requirements. |
| Telecom Line Card Bus Isolation | Automated Test Equipment (ATE) Signal Conditioning |
|
Use Scenario: Segregating control bus traffic between FPGA-based management processor and analog front-end ASICs on carrier-grade line cards. IC Role / Device Role / Timing Role: Dual-enable 3-state buffer enabling time-multiplexed access to shared configuration registers and status lines. Use Value: Independent OE control allows concurrent read/write arbitration without software coordination; 5.5 V tolerance accommodates legacy ASIC I/O. |
Use Scenario: Driving high-capacitance test fixture cables (≥50 pF) from 3.3 V pattern generator outputs in boundary-scan systems. IC Role / Device Role / Timing Role: High-current line driver with fast edge rates (10 ns/V transition rate) and low output impedance. Use Value: Sustains signal fidelity over 30 cm fixtures via −64 mA sink and +32 mA source capability, minimizing rise/fall time degradation. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal inverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74LVT240PW,118 | TSSOP20 package (4.4 mm width); identical electrical specs and pinout. | Better thermal performance in high-density layouts; requires finer-pitch reflow profile. | Select for space-constrained PCBs where SO20 footprint is unavailable. |
| SN74LVC240APWR | Lower drive (±24 mA); 1.65–3.6 V supply; no bus hold; different pinout (1OE/2OE swapped). | Lacks 5.5 V input tolerance and bus hold; unsuitable for 5 V bus interfacing or unconnected inputs. | Choose only if operating strictly within 3.3 V domain and external pull-ups are acceptable. |
Compared with 74LVT240DB,112, the PW variant offers identical functionality in a smaller footprint but demands tighter assembly control, while the SN74LVC240APWR sacrifices key robustness features-bus hold, 5.5 V tolerance, and higher drive-for lower cost and wider supply range.
Availability
74LVT240DB,112 is available at Aetrix Electronics and suitable for industrial backplane interfaces, telecom line card bus isolation, and memory module data buffering requiring stable component supply, long-term lifecycle assurance, and traceable sourcing.
Supply support for 74LVT240DB,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 leading semiconductor manufacturer specializing in high-performance logic, analog, and discrete components, with core expertise in automotive-qualified and industrial-grade solutions.
The 74LVT240 belongs to Nexperia's LVT (Low-Voltage TTL) logic family, designed specifically for high-speed, mixed-voltage system interfacing where 3.3 V operation, 5 V tolerance, and robust bus driving are essential.
FAQ
What is the maximum clock frequency supported by the 74LVT240DB,112?
The 74LVT240DB,112 does not operate as a clocked device but as a combinatorial buffer. Its 4.3 ns maximum propagation delay at 3.3 V enables reliable use in asynchronous bus systems up to approximately 100 MHz, assuming proper trace length matching and load capacitance ≤50 pF per output.
Can 74LVT240DB,112 be used to interface a 3.3 V microcontroller with a 5 V LCD display controller?
Yes - its 5.5 V-tolerant inputs accept 5 V logic levels safely, and its 3.3 V outputs can directly drive 5 V-tolerant inputs on most modern LCD controllers. However, verify the display controller's input VIH minimum (typically ≥2.0 V) matches the 74LVT240DB,112's VOH (≥2.0 V at −32 mA), which it does per datasheet Table 6.
Does the bus hold feature eliminate all need for external termination?
No - bus hold maintains DC logic state on unused inputs but does not replace AC termination for high-speed signal integrity. For transmission lines exceeding λ/10 at the highest operating frequency, series or parallel termination remains necessary to suppress reflections; bus hold only replaces pull-up/down resistors for static biasing.
Is the 74LVT240DB,112 qualified for automotive applications?
No - the 74LVT240DB,112 is specified for industrial temperature range (−40 °C to +85 °C) and is not AEC-Q100 qualified. Nexperia offers automotive-grade variants (e.g., 74LVT240AD,118) with extended qualification testing; this part is intended for industrial, telecom, and computing applications only.
74LVT240DB,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Nexperia USA Inc.
- Series:
- 74LVT
- Package/Case:
- 20-SSOP (0.209", 5.30mm Width)
- Packaging:
- Bulk
- 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,112 FAQ
1.How can I place an order for 74LVT240DB,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVT240DB,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 74LVT240DB,112 reliable?
The price and inventory of 74LVT240DB,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVT240DB,112 is usually 5 days.
3.What payment methods are accepted for 74LVT240DB,112?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVT240DB,112 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVT240DB,112?
74LVT240DB,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVT240DB,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 74LVT240DB,112?
For technical support, including 74LVT240DB,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVT240DB,112 requirements.
6.How does Aetrix verify that 74LVT240DB,112 is sourced from the original manufacturer or authorized distributors?
All 74LVT240DB,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 74LVT240DB,112 meets industry standards.
7.What is the process for return or replacement of 74LVT240DB,112?
All 74LVT240DB,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74LVT240DB,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 74LVT240DB,112 part is unused and in its original packaging.
Return procedure for 74LVT240DB,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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