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Texas Instruments SN74LV240ADBR
- Part No.:
- SN74LV240ADBR
- Manufacturer:
- Texas Instruments
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
SN74LV240ADBR.pdf
- Description:
- IC BUFFER INVERT 5.5V 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,967
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Product details
Overview
SN74LV240ADBR from Texas Instruments is an octal inverting buffer/driver with 3-state outputs, designed for 2V–5.5V VCC operation. It provides inverted signal transmission across two independent 4-bit channels, supports mixed-mode voltage translation, delivers ≤6.5ns propagation delay at 5V, and features Ioff for live insertion-used in smartphone memory address buffering and network switch bus isolation.
For engineers reviewing the SN74LV240ADBR datasheet, SN74LV240ADBR pinout, SN74LV240ADBR application, or SN74LV240ADBR equivalent, key selection criteria include its dual 4-bit 3-state architecture, 5.5-V tolerant inputs, ground-bounce/undershoot performance (VOLP <0.8V, VOHV >2.3V @3.3V), latch-up immunity (>250mA), and SSOP-20 package compatibility with industrial temperature range (–40°C to 125°C).
Technical Context
The SN74LV240ADBR implements two independent 4-bit inverting buffer sections, each with dedicated output-enable (OE) control. Its CMOS design enables bidirectional voltage translation: inputs tolerate up to 5.5V regardless of VCC, while outputs drive loads up to 16mA at 5V with rail-to-rail swing.
Operation relies on active-low OE logic: when OE is low, A→Y inversion occurs; when OE is high, all eight outputs enter high-impedance state. The Ioff feature disables input/output leakage during power-down, supporting partial-power-down mode and back-drive protection without requiring external isolation.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2V to 5.5V - Enables interoperability across 2.5V, 3.3V, and 5V logic domains in mixed-supply systems. |
| Max tpd | 6.5ns at VCC = 5V, CL = 15pF - Ensures timing-critical bus driving in high-speed memory and clock distribution paths. |
| Ioff Support | Active at VCC = 0V - Permits hot-plug capability and prevents damage during live insertion or partial system power-down. |
| Input Tolerance | Up to 5.5V - Allows interfacing with higher-voltage controllers without level shifters in down-translation applications. |
| Output Drive | ±16mA at VCC = 5V - Sufficient to drive multiple CMOS loads or moderate capacitive buses without external buffers. |
| ESD Rating | HBM ±2000V - Meets industrial-grade robustness requirements for handling and board-level reliability. |
| Operating Temp | –40°C to 125°C - Qualified for automotive under-hood, industrial control, and telecom infrastructure environments. |
Pinout & Package
SN74LV240ADBR uses a 20-pin SSOP (DB) package measuring 7.2mm × 7.8mm (body: 7.2mm × 5.30mm), optimized for space-constrained PCB layouts while maintaining hand-solderability and reflow compatibility.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 19OE | Active-low output enable (per 4-bit group) | Controls high-impedance state independently for each half of the device; critical for bus arbitration and multi-drop sharing. |
| 1A1–1A4, 2A1–2A4 | Inverting data inputs (two groups of four) | Accept 5.5-V tolerant signals; invert and route to corresponding Y outputs when OE is asserted low. |
| 1Y1–1Y4, 2Y1–2Y4 | Inverted 3-state outputs (two groups of four) | Drive downstream logic with rail-to-rail swing; enter high-Z when respective OE is high-enabling shared bus topology. |
| GND (Pin 10), VCC (Pin 20) | Power supply terminals | Dual power pins support low-inductance decoupling; require local 0.1µF ceramic bypass near VCC for noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Wide VCC range (2V–5.5V) | Supports single-supply operation across legacy 5V, mainstream 3.3V, and low-power 2.5V systems without redesign. |
| 5.5-V tolerant inputs | Eliminates need for external level translators when interfacing with 5V microcontrollers or FPGAs driving 3.3V buses. |
| Ioff power-off protection | Blocks current flow between powered and unpowered sections, preventing back-driving and enabling safe hot-swap in modular systems. |
| Low ground bounce (VOLP <0.8V) | Reduces switching noise coupling into shared ground planes-critical for mixed-signal integrity in wearables and handsets. |
| Latch-up immunity >250mA | Guarantees robustness against transient overcurrent events per JESD17, enhancing field reliability in noisy industrial environments. |
Applications
| Smartphone Memory Interface | Network Switch Backplane Driver |
|---|---|
Use Scenario: Buffering and isolating address lines between AP and LPDDR memory in compact handset designs. IC Role / Device Role / Timing Role: Octal inverting buffer with 3-state control, enabling dynamic bus sharing between CPU and memory controller during low-power states. Use Value: 6.5ns max tpd ensures setup/hold timing margins are maintained at DDR clock rates; Ioff prevents data corruption during AP sleep transitions. | Use Scenario: Driving parallel control signals across backplane traces in enterprise Ethernet switches. IC Role / Device Role / Timing Role: Inverting bus driver with independent OE control per 4-bit group, supporting hot-swap module detection and configuration. Use Value: 5.5-V tolerant inputs interface directly with 5V management MCU; high-impedance outputs prevent contention during firmware updates. |
| Wearable Sensor Hub Interface | Industrial PLC I/O Expansion |
Use Scenario: Level-shifting and buffering sensor data streams from analog front-ends to 3.3V MCU in fitness bands. IC Role / Device Role / Timing Role: Voltage-translating inverter with low-noise output characteristics (VOLP <0.8V), placed adjacent to precision ADCs. Use Value: Minimizes ground bounce-induced offset errors in sub-mV sensor measurements; operates reliably at 2V for ultra-low-power modes. | Use Scenario: Isolating digital I/O expansion modules from main controller bus in programmable logic controllers. IC Role / Device Role / Timing Role: 3-state octal driver enabling modular add-on cards to share common address/data lines without hardware switches. Use Value: Latch-up immunity >250mA withstands industrial ESD events; –40°C to 125°C rating ensures operation in cabinet-mounted enclosures. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal inverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC240APWR | Lower VCC min (1.65V), higher drive (±24mA), but no Ioff support and narrower temp range (–40°C to 105°C). | Better suited for battery-powered 1.8V systems; unsuitable for hot-swap or partial power-down use cases. | Select when lowest supply voltage and highest drive are prioritized over power-off isolation and extended temperature operation. |
| 74LVX240M | Same VCC range (2V–3.6V), lower max tpd (5.5ns @3.3V), but obsolete status and limited distributor availability. | Legacy drop-in for existing 3.3V-only designs; lacks 5V tolerance and modern packaging options. | Consider only for legacy repair or second-source validation; not recommended for new designs due to obsolescence risk. |
Compared with SN74LVC240APWR and 74LVX240M, the SN74LV240ADBR uniquely balances wide voltage operation, Ioff-enabled hot-swap safety, and industrial temperature compliance-making it optimal for next-generation embedded systems requiring both flexibility and ruggedness.
Availability
SN74LV240ADBR is available at Aetrix Electronics and suitable for smartphone memory interfaces, network switch backplane drivers, wearable sensor hubs, and industrial PLC I/O expansion requiring stable component supply across automotive and industrial lifecycles.
Supply support for SN74LV240ADBR 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 leadership in logic IC innovation and automotive-grade qualification.
The SN74LV240ADBR belongs to TI's LV-A family of low-voltage, high-speed logic devices engineered for robust bus interface applications in portable, networking, and industrial equipment where voltage translation, power sequencing, and noise immunity are critical.
FAQ
What is the maximum propagation delay of the SN74LV240ADBR at 5V supply?
The SN74LV240ADBR has a maximum propagation delay (tpd) of 6.5ns at VCC = 5V ±0.5V, CL = 15pF, and TA = 25°C. This value is specified under worst-case switching conditions and ensures reliable timing margin in high-speed memory and clock distribution applications. The SN74LV240ADBR maintains sub-10ns performance even at 50pF load, supporting dense PCB routing with minimal timing skew.
Does the SN74LV240ADBR support hot-plug or live insertion?
Yes, the SN74LV240ADBR supports live insertion via its Ioff feature, which disables input/output leakage when VCC = 0V. This prevents back-driving and current flow between powered and unpowered circuit sections-enabling safe hot-swap in modular systems like network switch line cards or industrial I/O modules. The SN74LV240ADBR meets JESD78 latch-up immunity standards (>250mA), further enhancing robustness during insertion events.
What package type is used by the SN74LV240ADBR?
The SN74LV240ADBR uses a 20-pin SSOP (Shrink Small Outline Package), designated DB, with dimensions 7.2mm × 7.8mm (body size 7.2mm × 5.30mm). It is supplied in tape-and-reel format (2000 units per reel), RoHS-compliant, with NIPDAU lead finish and moisture sensitivity level (MSL) 1-suitable for standard surface-mount reflow processes without dry-pack requirements.
Can the SN74LV240ADBR interface between 5V and 3.3V logic domains?
Yes, the SN74LV240ADBR supports mixed-mode voltage operation: its inputs tolerate up to 5.5V regardless of VCC setting, enabling direct connection to 5V controllers while operating at 3.3V or 2.5V. Outputs swing rail-to-rail (0V to VCC), so the SN74LV240ADBR provides clean 3.3V logic levels to downstream devices. This eliminates external level shifters in down-translation scenarios such as FPGA-to-MCU communication.
What is the operating temperature range for the SN74LV240ADBR?
The SN74LV240ADBR is rated for operation from –40°C to +125°C, qualifying it for automotive under-hood, industrial control cabinets, and telecom infrastructure applications. This extended range is validated across all electrical parameters in the datasheet, including propagation delay, output drive strength, and Ioff leakage-ensuring consistent SN74LV240ADBR performance across thermal extremes without derating.
SN74LV240ADBR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LV
- Package/Case:
- 20-SSOP (0.209", 5.30mm 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:
- 16mA, 16mA
- Voltage - Supply:
- 2V ~ 5.5V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SSOP
SN74LV240ADBR FAQ
1.How can I place an order for SN74LV240ADBR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LV240ADBR 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 SN74LV240ADBR reliable?
The price and inventory of SN74LV240ADBR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LV240ADBR is usually 5 days.
3.What payment methods are accepted for SN74LV240ADBR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LV240ADBR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LV240ADBR?
SN74LV240ADBR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LV240ADBR 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 SN74LV240ADBR?
For technical support, including SN74LV240ADBR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LV240ADBR requirements.
6.How does Aetrix verify that SN74LV240ADBR is sourced from the original manufacturer or authorized distributors?
All SN74LV240ADBR 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 SN74LV240ADBR meets industry standards.
7.What is the process for return or replacement of SN74LV240ADBR?
All SN74LV240ADBR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LV240ADBR, 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 SN74LV240ADBR part is unused and in its original packaging.
Return procedure for SN74LV240ADBR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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