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Texas Instruments SN74LVT240APWR
- Part No.:
- SN74LVT240APWR
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVT240APWR.pdf
- Description:
- IC BUFFER INVERT 3.6V 20TSSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,002
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Product details
Overview
SN74LVT240APWR from Texas Instruments is an octal buffer/line driver IC designed for 3.3-V VCC operation with 5-V tolerant inputs and outputs, supporting mixed-mode signal interfacing between 3.3-V logic and legacy 5-V systems. It features two independent 4-bit channels, Ioff and power-up 3-state for hot insertion, ±100 µA Ioff at VCC = 0 V, and operates from −40°C to 85°C in TSSOP-20 package.
For engineers reviewing the SN74LVT240APWR datasheet, SN74LVT240APWR pinout, SN74LVT240APWR application, or SN74LVT240APWR equivalent, key selection considerations include its 3.3-V supply compatibility with 5-V I/O tolerance, hot-swap support via Ioff/power-up 3-state, low ground bounce (<0.8 V), and guaranteed operation down to 2.7 V for battery-powered systems.
Technical Context
This device implements dual 4-bit noninverting buffers with separate output-enable (OE) controls per group. Each channel passes A→Y when OE is low; outputs enter high-impedance state when OE is high or during power-up/down (VCC < 1.5 V). The Ioff circuit blocks current backflow when powered down, while power-up 3-state prevents bus contention.
It supports TTL-level input thresholds (VIL = 0.8 V, VIH = 2 V) and delivers 64 mA sink / 32 mA source drive strength at 3.3 V. Propagation delays are as low as 1.1 ns (tPLH, VCC = 3.3 V), with output enable/disable times under 5 ns - enabling use in high-speed address/data buffering and level translation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7 V to 3.6 V - enables stable operation in unregulated battery systems down to 2.7 V without brownout. |
| I/O Voltage Tolerance | 5-V tolerant inputs and outputs - allows direct interface to 5-V buses without external level shifters. |
| Output Drive | 64 mA sink / 32 mA source - sufficient to drive standard TTL loads and moderate-capacitance PCB traces. |
| tPLH/tPHL | 1.1–3.8 ns (VCC = 3.3 V) - supports >250 MHz data rates in short-path buffering applications. |
| Ioff | ±100 µA at VCC = 0 V - prevents damaging back-current during hot insertion or partial power-down. |
| ESD Protection | 2000-V HBM, 200-V MM, 1000-V CDM - meets industrial-grade robustness requirements for board-level handling. |
| Operating Temperature | −40°C to +85°C - qualified for extended industrial environments including automotive under-hood control modules. |
Pinout & Package
TSSOP-20 (PW) package: 4.4 mm × 6.5 mm body, 0.65 mm lead pitch, 1.2 mm max height, gull-wing leads, RoHS-compliant NiPdAu finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Output-enable inputs (active-low) | Independent control of each 4-bit buffer group; asserted low enables A→Y pass-through. |
| 1A1–1A4, 2A1–2A4 | Data inputs | Eight total inputs grouped into two 4-bit lanes; accept 5-V logic levels with 3.3-V VCC. |
| 1Y1–1Y4, 2Y1–2Y4 | Buffered outputs | Noninverting outputs with 3.3-V swing and 5-V tolerance; tri-state capable via OE. |
| GND (Pin 10), VCC (Pin 11) | Power terminals | Dual dedicated power pins reduce switching noise; GND/VCC placement minimizes loop inductance. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode signal operation | 3.3-V core logic with 5-V I/O tolerance enables seamless interconnection between modern low-voltage ASICs/FPGAs and legacy 5-V peripherals. |
| Ioff and power-up 3-state | Prevents back-current and bus contention during hot-plug events or partial system power cycling - critical for modular backplane designs. |
| Low ground bounce (VOLP) | <0.8 V at VCC = 3.3 V ensures signal integrity during heavy simultaneous switching, reducing EMI and timing jitter. |
| Latch-up immunity | Exceeds 100 mA per JESD 78 Class II - eliminates risk of destructive latch-up in noisy industrial or automotive power domains. |
| Wide VCC operating range | 2.7–3.6 V supports direct connection to Li-ion battery rails (3.0–3.7 V nominal) without regulation overhead. |
Applications
| Industrial PLC Backplanes | Automotive Body Control Modules |
|---|---|
|
Use Scenario: Buffering address/data lines between a 3.3-V microcontroller and legacy 5-V peripheral ICs on a modular I/O carrier board. IC Role / Device Role / Timing Role: Noninverting octal buffer providing level translation and drive strength enhancement with hot-swap safety. Use Value: Eliminates need for discrete level shifters and pull-up networks while ensuring glitch-free insertion/removal of I/O modules under live power. |
Use Scenario: Interfacing a 3.3-V CAN controller MCU to 5-V sensor clusters and relay drivers in door module assemblies. IC Role / Device Role / Timing Role: Bidirectional voltage-tolerant buffer isolating MCU GPIOs from higher-voltage subsystems during transient conditions. Use Value: Maintains functional safety by preventing latch-up or damage during load-dump transients or battery disconnect/reconnect sequences. |
| Test Equipment Signal Routing | Communications Baseband Boards |
|
Use Scenario: Multiplexing and conditioning digital stimulus signals across multiple DUT interfaces in automated test fixtures. IC Role / Device Role / Timing Role: Low-skew, low-ground-bounce buffer enabling precise timing alignment across parallel test channels. Use Value: Reduces measurement uncertainty caused by simultaneous switching noise, improving repeatability of parametric tests. |
Use Scenario: Driving high-capacitance traces from FPGA I/O banks to analog front-end components in wireless infrastructure baseband cards. IC Role / Device Role / Timing Role: High-drive-strength line driver maintaining signal edge integrity over 10+ cm FR4 traces. Use Value: Enables reliable 100+ Mbps parallel data transfer without added termination or repeater ICs. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer/level translation applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVTH240PWRE4 | Lower drive (24 mA sink), LVTH family - no Ioff, no hot-insertion support, 2.7–3.6 V only. | Suitable for static-board applications without hot-swap requirement; not rated for backplane modularity. | Select if cost sensitivity outweighs hot-swap need and drive strength is sufficient for target load. |
| 74ALVC16240DGGR | 16-bit (dual-octal), 1.65–3.6 V VCC, no 5-V tolerance - requires external clamping for 5-V interface. | Better suited for fully 3.3-V or mixed 1.8/3.3-V systems; incompatible with direct 5-V bus connection. | Choose when scaling to wider buses and full 3.3-V domain is confirmed; avoid where 5-V I/O is mandatory. |
Compared with SN74LVTH240PWRE4 and 74ALVC16240DGGR, the SN74LVT240APWR uniquely combines 5-V I/O tolerance, Ioff-enabled hot insertion, and 64 mA drive - making it the only option among the three qualified for mixed-voltage backplane expansion slots requiring live module replacement.
Availability
SN74LVT240APWR is available at Aetrix Electronics and suitable for industrial automation, automotive electronics, and communications infrastructure requiring stable component supply across long product lifecycles and volume production ramps.
Supply support for SN74LVT240APWR 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
Texas Instruments is a global semiconductor leader specializing in analog, embedded processing, and connectivity technologies, with decades of experience in industrial-grade logic and interface solutions.
The SN74LVT240APWR belongs to TI's LVT (Low-Voltage BiCMOS Technology) logic family, engineered for high-speed, mixed-voltage system interfacing in demanding industrial and automotive applications where reliability and voltage translation are critical.
FAQ
What is the maximum input voltage the SN74LVT240APWR can tolerate on its I/O pins?
The SN74LVT240APWR supports input voltages up to 5.5 V on all I/O pins, regardless of VCC level - enabling direct connection to 5-V logic families without external protection or level-shifting circuitry. This 5-V tolerance is explicitly specified in the recommended operating conditions table and verified across temperature and voltage corners.
Does the SN74LVT240APWR support hot insertion, and how is it implemented?
Yes, the SN74LVT240APWR supports hot insertion via two integrated features: Ioff circuitry disables outputs and blocks reverse current flow when VCC = 0 V, and power-up 3-state forces outputs into high-impedance during VCC ramp-up/down (0–1.5 V). Both mechanisms are documented in the functional description and electrical characteristics sections of the SN74LVT240APWR datasheet.
What is the minimum VCC required for guaranteed operation of the SN74LVT240APWR?
The SN74LVT240APWR is fully specified from VCC = 2.7 V to 3.6 V. At 2.7 V, it maintains VIH = 2.0 V, VIL = 0.8 V, tPLH/tPHL ≤ 4.6 ns, and IOL = 24 mA - meeting all recommended operating conditions. Operation below 2.7 V is not guaranteed and may result in marginal timing or logic threshold behavior.
Can unused inputs on the SN74LVT240APWR be left floating?
No - all unused inputs on the SN74LVT240APWR must be tied to either VCC or GND to prevent undefined logic states, increased ICC, or potential oscillation. This requirement is explicitly stated in Note 4 of the recommended operating conditions section and reinforced in TI application report SCBA004.
What package type and lead finish does the SN74LVT240APWR use?
The SN74LVT240APWR uses a TSSOP-20 (PW) package with 0.65 mm lead pitch, 4.4 mm × 6.5 mm body, and NiPdAu (nickel-palladium-gold) lead finish. It is RoHS-compliant, moisture sensitivity level (MSL) 1, and rated for peak reflow at 260°C - as confirmed in TI's official packaging addendum.
SN74LVT240APWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVT
- 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:
- 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-TSSOP
SN74LVT240APWR FAQ
1.How can I place an order for SN74LVT240APWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVT240APWR 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 SN74LVT240APWR reliable?
The price and inventory of SN74LVT240APWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVT240APWR is usually 5 days.
3.What payment methods are accepted for SN74LVT240APWR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVT240APWR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVT240APWR?
SN74LVT240APWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVT240APWR 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 SN74LVT240APWR?
For technical support, including SN74LVT240APWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVT240APWR requirements.
6.How does Aetrix verify that SN74LVT240APWR is sourced from the original manufacturer or authorized distributors?
All SN74LVT240APWR 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 SN74LVT240APWR meets industry standards.
7.What is the process for return or replacement of SN74LVT240APWR?
All SN74LVT240APWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVT240APWR, 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 SN74LVT240APWR part is unused and in its original packaging.
Return procedure for SN74LVT240APWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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