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Texas Instruments SN74LVC240APWRG4
- Part No.:
- SN74LVC240APWRG4
- Manufacturer:
- Texas Instruments
- Package:
- 20-TSSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVC240APWRG4.pdf
- Description:
- IC BUFFER INVERT 3.6V 20TSSOP
- Quantity:
- Payment:
- Shipping:
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Product details
Overview
SN74LVC240APWRG4 from Texas Instruments is an octal noninverting buffer/driver with dual 3-state output banks, operating from 1.65V to 3.6V supply, supporting 5.5V-tolerant inputs, delivering ≤6.5ns propagation delay at 3.3V, and enabling mixed-mode signal interfacing (e.g., 5V logic driving into 3.3V system). It is used for redriving digital buses in industrial control backplanes.
For engineers reviewing the SN74LVC240APWRG4 datasheet, SN74LVC240APWRG4 pinout, SN74LVC240APWRG4 application, or SN74LVC240APWRG4 equivalent, key selection criteria include VCC range compatibility, 3-state bank enable timing, Ioff-enabled live insertion support, and TSSOP-20 thermal performance under sustained load.
Technical Context
The SN74LVC240APWRG4 integrates two independent 4-channel banks (Bank 1: pins 1A1–1A4/1Y1–1Y4; Bank 2: pins 2A1–2A4/2Y1–2Y4), each controlled by its own active-low output enable (1OE on pin 1, 2OE on pin 19). Its CMOS architecture provides balanced sourcing/sinking capability (±24mA at 3V) and rail-to-rail output swing (0–VCC).
It features Ioff circuitry that disables all outputs when VCC = 0V, preventing back-drive current during partial power-down, and includes overvoltage-tolerant inputs (up to 5.5V) compatible with 5V logic while powered from 3.3V or lower-enabling seamless level translation without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65V to 3.6V - Enables direct interface with 1.8V, 2.5V, and 3.3V logic domains without level shifters. |
| Input Voltage Tolerance | Up to 5.5V - Allows connection to legacy 5V systems while VCC is at 3.3V or lower, supporting mixed-voltage board design. |
| Max Propagation Delay | 6.5ns at VCC = 3.3V - Ensures sub-150MHz timing margin for high-speed bus redriving in FPGA/CPU peripheral interfaces. |
| Output Drive Strength | ±24mA at VCC = 3V - Sufficient to drive 50pF loads across 12cm traces while maintaining signal integrity per TI layout guidelines. |
| Ioff Current | ±20μA at VI/VO = 5.5V - Guarantees safe hot-plug operation and prevents current leakage during system power sequencing. |
| ESD Rating (HBM) | ±2000V - Meets industrial-grade ESD robustness requirements per ANSI/ESDA/JEDEC JS-001. |
| Operating Temperature | –40°C to +125°C - Qualified for extended-temperature industrial and automotive under-hood applications. |
Pinout & Package
TSSOP-20 (PW) package: 6.5mm × 6.4mm body with 0.65mm pitch; thermally enhanced for surface-mount reliability in dense PCB layouts.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE (Pin 1) | Bank 1 Output Enable (active low) | Controls 1Y1–1Y4; tie high via pull-up to ensure high-Z during power-up if not actively driven. |
| 2OE (Pin 19) | Bank 2 Output Enable (active low) | Controls 2Y1–2Y4; enables independent bus isolation between two subsystems on shared data lines. |
| 1A1–1A4 (Pins 2,3,4,7) | Bank 1 Input Channels | Noninverting inputs feeding 1Y1–1Y4; accept 0–5.5V signals regardless of VCC setting. |
| 1Y1–1Y4 (Pins 18,17,16,15) | Bank 1 Output Channels | 3-state buffered outputs; high-impedance when 1OE = high, reducing bus contention risk. |
| 2A1–2A4 (Pins 20,13,12,11) | Bank 2 Input Channels | Noninverting inputs feeding 2Y1–2Y4; electrically isolated from Bank 1 for dual-bus routing. |
| 2Y1–2Y4 (Pins 5,6,7,8) | Bank 2 Output Channels | 3-state outputs synchronized to 2OE; supports separate enable timing for time-multiplexed data paths. |
| VCC (Pin 20) | Positive Supply | Primary power rail; requires local 0.1μF bypass capacitor per TI layout guidance to suppress switching noise. |
| GND (Pin 10) | Ground Reference | Common return path for all I/O and supply currents; must connect to solid ground plane for EMI control. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode signal operation | 5V-tolerant inputs with 3.3V VCC enable direct interfacing between legacy 5V peripherals and modern low-voltage controllers without external translators. |
| Ioff partial-power-down protection | Outputs automatically enter high-impedance state when VCC = 0V, eliminating back-drive current during hot-swap or power sequencing events. |
| Balanced CMOS 3-state outputs | Symmetric ±24mA drive at 3V ensures matched rise/fall times and minimizes ground bounce (<0.8V typical) and VOH undershoot (>2V typical). |
| Low dynamic power consumption | 32pF typical power dissipation capacitance (Cpd) at 3.3V enables <1mW static power at 10MHz, critical for battery-backed or thermally constrained modules. |
| Latch-up immunity | Exceeds 100mA per JESD17 - eliminates risk of destructive latch-up under transient overvoltage or ESD stress in harsh environments. |
Applications
| Industrial Backplane Redriving | Embedded Controller Reset Hold |
|---|---|
|
Use Scenario: Redriving multiplexed address/data bus signals across a 15cm backplane in programmable logic controller (PLC) I/O modules. IC Role / Device Role / Timing Role: Octal buffer isolating and strengthening signals between CPU and remote I/O cards; dual OE pins allow staggered enable timing to reduce simultaneous switching noise. Use Value: Maintains signal edge integrity (≤6.5ns tpd) and prevents bus contention via independent 3-state control, eliminating need for discrete series resistors or additional logic. |
Use Scenario: Holding microcontroller reset line in asserted state during power stabilization in medical diagnostic equipment. IC Role / Device Role / Timing Role: Noninverting buffer with Ioff and 5.5V-tolerant inputs holds reset signal low until main VCC reaches regulation, then releases reset synchronously. Use Value: Eliminates external RC timing network and Schmitt-trigger IC; leverages built-in Ioff to prevent back-drive from 5V reset source into unpowered 3.3V domain. |
| FPGA Configuration Bus Interface | LED Indicator Driver Bank |
|
Use Scenario: Interfacing FPGA configuration pins (e.g., INIT_B, PROGRAM_B) to external flash memory in reconfigurable embedded systems. IC Role / Device Role / Timing Role: Level-translating buffer translating 5V flash control signals to 3.3V FPGA I/O banks while providing drive strength for 30pF trace capacitance. Use Value: Achieves reliable configuration startup without voltage dividers or dedicated level shifters; 1.65V min VCC supports low-power configuration modes. |
Use Scenario: Driving eight status LEDs (red/green/yellow) on industrial HMI panels with common-anode topology. IC Role / Device Role / Timing Role: Sink-driver buffer using outputs in active-low mode (inverted externally) to switch LED cathodes to GND with precise current limiting. Use Value: Delivers consistent 24mA sink per channel at 3.3V, enabling bright, uniform LED illumination without external current-limiting resistors per channel. |
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 |
|---|---|---|---|
| SN74LVC240APW | Same silicon, identical electrical specs; differs only in RoHS compliance marking (G4 suffix denotes green/lead-free). | No functional difference; suitable for same designs where lead-free finish is required per IPC-J-STD-609. | Select SN74LVC240APW for legacy BOMs; SN74LVC240APWRG4 for new designs requiring RoHS-compliant assembly. |
| 74LVC240AD,212 (Nexperia) | Identical pinout and DC specs; tpd = 7.5ns max at 3.3V (vs. 6.5ns for TI part); Ioff = ±10μA (vs. ±20μA). | Marginally slower timing and tighter Ioff spec may affect hot-swap reliability in high-noise industrial settings. | Acceptable for cost-sensitive consumer applications; verify timing slack and power sequencing margins before substituting in industrial control designs. |
Compared with SN74LVC240APW and 74LVC240AD,212, the SN74LVC240APWRG4 offers the fastest guaranteed propagation delay (6.5ns), highest Ioff tolerance (±20μA), and full TI technical support ecosystem-including validated layout guidelines and thermal models-making it optimal for mission-critical industrial redriving.
Availability
SN74LVC240APWRG4 is available at Aetrix Electronics and suitable for industrial backplane redriving, embedded controller reset hold, FPGA configuration bus interface, and LED indicator driver bank applications requiring stable component supply across multi-year production cycles.
Supply support for SN74LVC240APWRG4 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 logic solutions, with over 50 years of innovation in high-reliability interface ICs.
The SN74LVC240APWRG4 belongs to TI's LVC (Low-Voltage CMOS) logic family, designed specifically for low-voltage, high-speed, mixed-signal interfacing in industrial automation, test equipment, and communications infrastructure.
FAQ
What is the maximum input voltage the SN74LVC240APWRG4 can tolerate?
The SN74LVC240APWRG4 accepts input voltages up to 5.5V across its entire recommended operating temperature range, regardless of VCC level (1.65V–3.6V). This overvoltage tolerance is explicitly specified in Section 5.3 of the datasheet and enables direct interfacing with 5V logic families without external level-shifting components. The SN74LVC240APWRG4 maintains full functionality and does not require clamping diodes or current limiting when driven by 5V sources.
Does the SN74LVC240APWRG4 support hot-plug or live-insertion applications?
Yes, the SN74LVC240APWRG4 supports live insertion via its Ioff feature, which disables all outputs and limits leakage to ±20μA when VCC = 0V. This prevents back-drive current from powered downstream circuits into an unpowered SN74LVC240APWRG4, protecting both the device and the system. The feature is validated per JEDEC JESD78 and is explicitly documented in Section 7.3.2 of the datasheet.
What is the recommended bypass capacitor for the SN74LVC240APWRG4?
Texas Instruments recommends a 0.1μF ceramic bypass capacitor placed as close as possible to the VCC pin (Pin 20) and GND (Pin 10) of the SN74LVC240APWRG4, with a low-inductance ground return path. This value is specified in Section 8.3 of the datasheet and is validated to suppress high-frequency switching noise generated by the 3-state outputs. For enhanced noise rejection, TI further suggests paralleling with a 1μF capacitor.
Can both output banks of the SN74LVC240APWRG4 be enabled simultaneously?
Yes, both output banks of the SN74LVC240APWRG4 can be enabled simultaneously by driving 1OE (Pin 1) and 2OE (Pin 19) low. The device's dual-bank architecture allows fully independent control, but concurrent enablement is electrically valid and commonly used for full-bus buffering. However, simultaneous switching of all eight outputs increases ground bounce and supply current demand-TI recommends verifying layout and decoupling per Section 8.4 to maintain signal integrity.
Is the SN74LVC240APWRG4 pin-compatible with other TSSOP-20 octal buffers?
The SN74LVC240APWRG4 shares the standard TSSOP-20 pinout defined by JEDEC MO-153, making it mechanically and electrically pin-compatible with functionally equivalent octal buffers such as the SN74LVC244APWR and 74LVC240AD,212. However, pin compatibility does not guarantee identical timing or Ioff behavior-always validate setup/hold times and power sequencing requirements against the specific alternative's datasheet before substitution.
SN74LVC240APWRG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 20-TSSOP (0.173", 4.40mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Discontinued at Digi-Key
- 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:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TSSOP
SN74LVC240APWRG4 FAQ
1.How can I place an order for SN74LVC240APWRG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC240APWRG4 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 SN74LVC240APWRG4 reliable?
The price and inventory of SN74LVC240APWRG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC240APWRG4 is usually 5 days.
3.What payment methods are accepted for SN74LVC240APWRG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVC240APWRG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVC240APWRG4?
SN74LVC240APWRG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC240APWRG4 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 SN74LVC240APWRG4?
For technical support, including SN74LVC240APWRG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC240APWRG4 requirements.
6.How does Aetrix verify that SN74LVC240APWRG4 is sourced from the original manufacturer or authorized distributors?
All SN74LVC240APWRG4 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 SN74LVC240APWRG4 meets industry standards.
7.What is the process for return or replacement of SN74LVC240APWRG4?
All SN74LVC240APWRG4 units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC240APWRG4, 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 SN74LVC240APWRG4 part is unused and in its original packaging.
Return procedure for SN74LVC240APWRG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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