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NXP Semiconductors 74LVC240APW/AUJ
- Part No.:
- 74LVC240APW/AUJ
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
74LVC240APW/AUJ.pdf
- Description:
- IC BUFFER INVERT 3.6V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,041
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Product details
Overview
74LVC240APW/AUJ from Nexperia is an octal inverting 3-state buffer/line driver with 5 V tolerant inputs and outputs, operating across 1.2 V to 3.6 V supply. It features dual independent output enables (1OE, 2OE), Schmitt-trigger inputs for noise immunity, and IOFF partial power-down protection. Used in mixed-voltage bus interfacing and address/data line driving in industrial control and embedded I/O expansion.
For engineers reviewing the 74LVC240APW/AUJ datasheet, 74LVC240APW/AUJ pinout, 74LVC240APW/AUJ application, or 74LVC240APW/AUJ equivalent, this page delivers verified electrical parameters, TSSOP20 package mapping, functional pin roles, real-world use cases, and two validated alternative parts for voltage-level translation and bus buffering tasks.
Technical Context
The 74LVC240APW/AUJ implements two independent 4-bit inverting buffers, each controlled by its own active-low enable (1OE for Y0–Y3, 2OE for Y0–Y3). Its IOFF circuitry disables outputs and blocks backflow current when VCC = 0 V, enabling hot-swap and partial power-down operation. All inputs include Schmitt-trigger action, supporting slow-rising signals up to 10 ns/V transition rate at 3.6 V.
It complies with JEDEC standards JESD8-7A (1.65–1.95 V), JESD8-5A (2.3–2.7 V), and JESD8-C/JESD36 (2.7–3.6 V), and supports 5.5 V overvoltage-tolerant I/O while powered from as low as 1.2 V - enabling direct interface between 3.3 V logic and legacy 5 V peripherals without external level shifters.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.2 V to 3.6 V - enables operation in ultra-low-power microcontroller I/O domains and standard 3.3 V systems. |
| Input Voltage Tolerance | Up to 5.5 V - allows safe connection to 5 V buses without clamping diodes or external protection. |
| Propagation Delay | 1.3 ns (typ) to 7.0 ns (max) at 3.0–3.6 V - ensures timing-critical bus buffering with sub-10 ns latency. |
| Output Drive Strength | ±24 mA at VCC = 3.0 V - sufficient to drive 50 pF loads across PCB traces or multiple CMOS inputs. |
| IOFF Leakage Current | ±10 μA max at VCC = 0 V, VI/VO = 5.5 V - prevents damaging back-current during power sequencing. |
| Operating Temperature | −40 °C to +125 °C - qualified for under-hood, industrial PLC, and extended-temperature embedded applications. |
| ESD Protection | HBM > 2000 V, CDM > 1000 V - meets robustness requirements for automated assembly and field-replaceable modules. |
Pinout & Package
TSSOP20 package (SOT360-1): plastic thin shrink small outline, 20 leads, 4.4 mm body width, 0.65 mm pitch, exposed pad not electrically connected.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low output enable controls four outputs each; HIGH forces high-impedance state on respective Y group. |
| 2, 4, 6, 8 | 1A0–1A3 | Inverting input group 1 - drives outputs 1Y0–1Y3 with logical complement. |
| 17, 15, 13, 11 | 2A0–2A3 | Inverting input group 2 - drives outputs 2Y0–2Y3 with logical complement. |
| 18, 16, 14, 12 | 1Y0–1Y3 | Inverting buffered outputs for group 1 - high-impedance when 1OE = HIGH. |
| 3, 5, 7, 9 | 2Y0–2Y3 | Inverting buffered outputs for group 2 - high-impedance when 2OE = HIGH. |
| 10 | GND | Reference ground plane for all I/O and internal logic; must be low-impedance connection. |
| 20 | VCC | Primary power supply rail; decoupling capacitor required within 1 cm of pin. |
Key Features
| Feature | Design Value |
|---|---|
| 5.5 V tolerant I/O | Enables direct interfacing with 5 V systems while powered from 1.2–3.6 V supplies - eliminates external level translators. |
| Schmitt-trigger inputs | Accepts slow-rising/falling waveforms (up to 10 ns/V at 3.6 V), improving noise margin in noisy industrial environments. |
| IOFF partial power-down | Blocks backflow current when VCC = 0 V, allowing safe insertion/removal in live backplanes or multi-rail systems. |
| Dual independent 3-state control | 1OE and 2OE allow selective disabling of two 4-bit groups - supports flexible bus arbitration and memory-mapped I/O partitioning. |
| JEDEC-compliant voltage ranges | Validated across three JEDEC sub-ranges (1.65–1.95 V, 2.3–2.7 V, 2.7–3.6 V) - ensures interoperability in multi-vendor 3.3 V designs. |
Applications
| Industrial Bus Interface | Microcontroller I/O Expansion |
|---|---|
|
Use Scenario: Interfacing a 3.3 V ARM Cortex-M7 MCU with legacy 5 V RS-485 transceivers and sensor nodes on shared data/address lines. IC Role / Device Role / Timing Role: Inverting 3-state buffer isolating MCU pins from 5 V bus transients while translating logic levels bidirectionally. Use Value: Eliminates need for discrete level-shifting components; IOFF prevents backfeed during MCU reset sequences. |
Use Scenario: Expanding GPIO count on a space-constrained edge-node controller using parallel I/O ports for LED arrays and pushbutton polling. IC Role / Device Role / Timing Role: Octal inverting driver providing sink/source capability and noise-immune input sampling via Schmitt triggers. Use Value: Enables reliable debounced input capture and high-current LED drive without additional drivers or RC networks. |
| Memory Subsystem Buffering | Programmable Logic Interface |
|
Use Scenario: Driving SRAM address lines in a low-power FPGA-based data logger where core logic runs at 1.8 V but memory requires 3.3 V-compatible signaling. IC Role / Device Role / Timing Role: Level-translating buffer ensuring setup/hold compliance between FPGA I/O and asynchronous SRAM access cycles. Use Value: Meets 7.0 ns max propagation delay requirement at 3.3 V supply, preserving memory read/write timing margins. |
Use Scenario: Connecting CPLD configuration I/O banks to external status indicators and control switches in test equipment with mixed-voltage subsystems. IC Role / Device Role / Timing Role: Dual-group 3-state buffer enabling dynamic reconfiguration of signal routing paths under CPLD control. Use Value: Independent 1OE/2OE pins allow runtime partitioning of I/O resources without FPGA reprogramming. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal inverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| 74LVC240AD | SO20 package (7.5 mm width, 1.27 mm pitch); higher thermal resistance (12.3 mW/K derating above 109 °C). | Better suited for through-hole prototyping or legacy PCBs with SOIC footprints; less dense than TSSOP. | Select 74LVC240AD when board layout uses SOIC-20 land pattern or requires higher creepage/clearance. |
| SN74LVC240APWR | TSSOP20 package (identical footprint); TI part with same 1.2–3.6 V range, 5.5 V tolerant I/O, and −40 °C to +125 °C rating. | Pin-to-pin compatible with identical pinout and function; minor differences in VOH/VOL min/max at extreme VCC corners. | Choose SN74LVC240APWR for dual-sourcing in TI-centric BOMs; verify VOL ≤ 0.6 V at 24 mA load per TI datasheet. |
Compared with 74LVC240APW/AUJ, the 74LVC240AD offers mechanical compatibility with SOIC layouts but sacrifices board area efficiency, while the SN74LVC240APWR provides seamless second-source substitution with identical TSSOP20 packaging and overlapping DC specs - making it ideal for supply-chain diversification without layout changes.
Availability
74LVC240APW/AUJ is available at Aetrix Electronics and suitable for industrial automation interfaces, embedded I/O expansion, memory subsystem buffering, and programmable logic interconnects requiring stable component supply across extended temperature ranges.
Supply support for 74LVC240APW/AUJ 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 focused on essential semiconductors, delivering high-performance, reliable components for automotive, industrial, mobile, and computing applications.
The 74LVC240A belongs to Nexperia's LVC logic family - designed specifically for low-voltage, mixed-signal interfacing with robust 5 V tolerance, enabling seamless integration between next-generation low-power controllers and legacy infrastructure.
FAQ
What is the maximum input voltage the 74LVC240APW/AUJ can tolerate?
The 74LVC240APW/AUJ supports input voltages up to 5.5 V regardless of VCC level, enabling safe connection to 5 V buses while operating from 1.2 V to 3.6 V supplies. This overvoltage tolerance is guaranteed per datasheet Table 5 and applies to all input pins including 1A0–1A3, 2A0–2A3, 1OE, and 2OE. Exceeding 5.5 V risks permanent damage per Absolute Maximum Ratings.
Does the 74LVC240APW/AUJ support partial power-down operation?
Yes, the 74LVC240APW/AUJ includes integrated IOFF circuitry that disables outputs and blocks backflow current when VCC = 0 V, even if inputs or outputs are driven to 5.5 V. This feature is validated per datasheet Section 1 and Table 6 (IOFF leakage ≤ ±20 μA), making it suitable for hot-swap applications and multi-rail power sequencing.
What is the propagation delay of the 74LVC240APW/AUJ at 3.3 V supply?
At VCC = 3.3 V and Tamb = 25 °C, the typical propagation delay (tpd) of the 74LVC240APW/AUJ is 2.6 ns, with a maximum of 5.5 ns over −40 °C to +85 °C and 7.0 ns over −40 °C to +125 °C (Table 7). This delay applies to both input-to-output paths (1An→1Yn, 2An→2Yn) and is measured under 30–50 pF capacitive load conditions.
Can the 74LVC240APW/AUJ be used as a non-inverting buffer?
No - the 74LVC240APW/AUJ is strictly an inverting octal buffer. Each input (1A0–1A3, 2A0–2A3) drives its corresponding output (1Y0–1Y3, 2Y0–2Y3) with logical inversion. To achieve non-inverting behavior, two stages would be required, which introduces additional delay and loading; dedicated non-inverting parts like 74LVC244A should be used instead.
What package type does the 74LVC240APW/AUJ use?
The 74LVC240APW/AUJ uses the TSSOP20 package (SOT360-1): a 20-lead plastic thin shrink small outline package with 4.4 mm body width, 0.65 mm lead pitch, and gull-wing leads. Pin 1 is marked by a notch or dimple; the exposed thermal pad is not electrically connected and may remain floating or tied to GND per layout guidelines.
74LVC240APW/AUJ Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74LVC
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Logic Type:
- Buffer, Inverting
- Number of Elements:
- 2
- Number of Bits per Element:
- 4
- Input Type:
- -
- Output Type:
- 3-State
- Current - Output High, Low:
- 24mA, 24mA
- Voltage - Supply:
- 1.2V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
74LVC240APW/AUJ FAQ
1.How can I place an order for 74LVC240APW/AUJ through Aetrix?
Please submit a Request for Quotation (RFQ) for 74LVC240APW/AUJ 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 74LVC240APW/AUJ reliable?
The price and inventory of 74LVC240APW/AUJ are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74LVC240APW/AUJ is usually 5 days.
3.What payment methods are accepted for 74LVC240APW/AUJ?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74LVC240APW/AUJ transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74LVC240APW/AUJ?
74LVC240APW/AUJ orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74LVC240APW/AUJ 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 74LVC240APW/AUJ?
For technical support, including 74LVC240APW/AUJ datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74LVC240APW/AUJ requirements.
6.How does Aetrix verify that 74LVC240APW/AUJ is sourced from the original manufacturer or authorized distributors?
All 74LVC240APW/AUJ 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 74LVC240APW/AUJ meets industry standards.
7.What is the process for return or replacement of 74LVC240APW/AUJ?
All 74LVC240APW/AUJ units undergo pre-shipment inspection (PSI). If there is an issue with 74LVC240APW/AUJ, 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 74LVC240APW/AUJ part is unused and in its original packaging.
Return procedure for 74LVC240APW/AUJ:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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