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Texas Instruments SN74LVC240ADGVR
- Part No.:
- SN74LVC240ADGVR
- Manufacturer:
- Texas Instruments
- Package:
- 20-TFSOP (0.173", 4.40mm Width)
- Datasheet:
-
SN74LVC240ADGVR.pdf
- Description:
- IC BUFFER INVERT 3.6V 20TVSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,435
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Product details
Overview
SN74LVC240ADGVR from Texas Instruments is an octal non-inverting 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 3.3V bus). It is used in digital signal redriving, transmission line termination, and controller reset hold applications.
For engineers reviewing the SN74LVC240ADGVR datasheet, SN74LVC240ADGVR pinout, SN74LVC240ADGVR application, or SN74LVC240ADGVR equivalent, key selection criteria include VCC range compatibility, 3-state bank control timing, Ioff-enabled live insertion support, and TSSOP-20 package thermal performance for high-density PCB layouts.
Technical Context
The SN74LVC240ADGVR implements two independent 4-channel buffer banks, each controlled by a dedicated active-low output enable (OE1/OE2), allowing selective tri-state control of subsets of outputs without affecting the other bank. Its CMOS input structure accepts voltages up to 5.5V regardless of VCC, enabling direct interfacing between 5V and 3.3V domains.
It features Ioff circuitry that disables all outputs when VCC = 0V, preventing back-drive current and supporting partial power-down operation. Output drive strength is balanced (±24mA at 3V), with guaranteed VOL ≤ 0.55V and VOH ≥ 2.2V under full load, ensuring robust noise margins in noisy industrial environments.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 1.65V–3.6V - Enables single-supply operation across low-voltage logic families including LVTTL and LVCMOS. |
| Input Voltage Tolerance | Up to 5.5V - Allows safe connection to 5V systems without level shifters, simplifying mixed-voltage board design. |
| tpd (Max) | 6.5ns at VCC = 3.3V - Supports >100MHz signal redriving in high-speed digital interfaces with tight timing budgets. |
| Ioff Leakage | ±10μA max at VCC = 0V - Ensures zero-current back-drive during hot-swap or partial power-down, protecting upstream drivers. |
| Output Drive | ±24mA at VCC = 3V - Sustains clean edges into 50pF loads while meeting TTL-compatible voltage thresholds. |
| ESD Rating | ±2000V HBM - Meets industrial-grade ESD immunity requirements without external protection components. |
| Operating Temp | –40°C to +125°C - Qualified for automotive under-hood and industrial control applications with extended thermal range. |
Pinout & Package
DGVR denotes the TVSOP-20 (Thin Very Small Outline Package) variant: 5.0mm × 6.4mm body size, 0.4mm lead pitch, surface-mount, lead-free, RoHS-compliant package optimized for high-density routing and thermal dissipation (RθJA = 120.3°C/W).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | OE1, OE2 | Active-low bank enable inputs - Asserting either pin places its four associated outputs into high-impedance state; critical for bus arbitration and shared-line control. |
| 2–5, 7–8, 11–12, 14–15 | A1–A4, Y1–Y4 (Bank 1); A5–A8, Y5–Y8 (Bank 2) | Non-inverting input/output pairs - Each A→Y path provides gain-of-one buffering with no polarity inversion; supports bidirectional signal conditioning when paired with external logic. |
| 10 | GND | Reference ground plane connection - Must be low-inductance; decoupling capacitor (0.1μF) placed adjacent to Pin 10 and Pin 20 minimizes switching noise. |
| 20 | VCC | Primary power supply - Requires local 0.1μF ceramic bypass capacitor; supports dynamic current demands up to ±100mA total through VCC/GND pins. |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode signal interface | 5.5V-tolerant inputs at 1.65–3.6V VCC allow direct connection to legacy 5V logic without level translators, reducing BOM count and layout complexity. |
| Live-insertion support | Ioff functionality disables outputs when VCC = 0V, eliminating back-drive current during hot-plug operations in modular systems or field-replaceable units. |
| Bank-selectable 3-state control | Dual OE pins (OE1/OE2) independently disable four-output banks - enables time-multiplexed bus sharing or staggered power-up sequencing in multi-peripheral designs. |
| Low ground bounce | Typical VOLP < 0.8V at VCC = 3.3V ensures stable reference integrity during simultaneous output switching, reducing false triggering in adjacent circuits. |
| High noise immunity | VOHV > 2V undershoot suppression prevents false low-level detection during fast edge transitions, improving reliability in electrically noisy industrial environments. |
Applications
| LED Indicator Driving | Digital Signal Redriving |
|---|---|
Use Scenario: Driving multiple discrete LEDs from a low-drive microcontroller GPIO port. IC Role / Device Role: Current-boosting non-inverting buffer with 3-state capability for LED on/off control via OE pin. Use Value: Delivers up to 24mA per channel at 3.3V - sufficient to drive standard 20mA LEDs without external transistors, while OE allows blanking during system sleep. | Use Scenario: Reconditioning degraded clock or data signals traversing >12cm PCB traces. IC Role / Device Role: Low-skew, low-jitter redriver with matched rise/fall times and 6.5ns tpd. Use Value: Maintains signal integrity across long traces by restoring edge rates and driving 50pF loads - eliminates need for discrete RC networks or higher-power alternatives. |
| Transmission Line Termination | Controller Reset Hold |
Use Scenario: Driving impedance-matched transmission lines (e.g., 50Ω coax or stripline) in test equipment or communication modules. IC Role / Device Role: Source-terminated driver with series damping resistor placement support per TI layout guidelines. Use Value: Balanced ±24mA drive enables clean 0–3.3V transitions into 50Ω loads; tpd consistency across channels minimizes skew-induced jitter. | Use Scenario: Holding peripheral bus lines in known state during microcontroller reset assertion. IC Role / Device Role: Tri-state latch holding data/address lines stable while core logic resets. Use Value: OE-controlled high-impedance mode isolates peripherals from reset-induced glitches; Ioff prevents leakage when host VCC is off but peripheral remains powered. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74LVC244ADGVR | Non-inverting octal buffer with identical pinout, same VCC range and Ioff, but lacks bank-split OE control (single OE for all 8 outputs). | Suitable where global 3-state control suffices; not usable when independent bank isolation is required. | Select SN74LVC244ADGVR only if unified enable timing is acceptable and board layout rework for dual-OE routing is undesirable. |
| 74LVC240APWRE4 | Same functional spec and pinout, but in PW (TSSOP-20) package with 0.65mm pitch vs. DGVR's 0.4mm pitch - larger footprint and higher RθJA (120.3°C/W vs. 120.3°C/W, same value but different thermal path). | Preferred for manual assembly or lower-cost assembly lines; less suitable for ultra-dense layouts requiring fine-pitch routing. | Choose 74LVC240APWRE4 when TSSOP-20 handling constraints exist or when thermal margin above 120°C/W is acceptable. |
Compared with SN74LVC240ADGVR, SN74LVC244ADGVR sacrifices bank-level control for simpler enable logic, while 74LVC240APWRE4 trades package miniaturization for assembly flexibility - both require validation of OE timing and thermal derating in final system context.
Availability
SN74LVC240ADGVR is available at Aetrix Electronics and suitable for industrial automation, automotive body electronics, and embedded computing applications requiring stable component supply, long-term lifecycle assurance, and RoHS-compliant packaging.
Supply support for SN74LVC240ADGVR 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 logic ICs.
The SN74LVC240ADGVR belongs to TI's LVC (Low-Voltage CMOS) logic family, designed specifically for low-power, mixed-voltage interfacing in space-constrained industrial and automotive control systems.
FAQ
What is the maximum input voltage rating for SN74LVC240ADGVR?
The SN74LVC240ADGVR supports input voltages up to 5.5V across its entire recommended VCC range (1.65V–3.6V). This overvoltage tolerance allows direct interfacing with 5V logic families without external level-shifting circuitry, making SN74LVC240ADGVR ideal for mixed-signal board designs where legacy and modern logic coexist.
Does SN74LVC240ADGVR support independent control of its two output banks?
Yes, SN74LVC240ADGVR features two dedicated active-low output enable pins - OE1 (Pin 1) controls Bank 1 outputs (Y1–Y4), and OE2 (Pin 19) controls Bank 2 outputs (Y5–Y8). This architecture enables precise timing isolation, such as holding one peripheral bus active while resetting another - a capability not present in single-OE octal buffers like SN74LVC244ADGVR.
Can SN74LVC240ADGVR be used in hot-swap applications?
Yes, SN74LVC240ADGVR incorporates Ioff circuitry that disables all outputs when VCC = 0V, limiting Ioff leakage to ±10μA maximum. This prevents back-driving of powered circuitry during live insertion, satisfying hot-swap requirements in modular systems - a verified feature confirmed in TI's Electrical Characteristics table under Ioff test conditions.
What is the typical propagation delay of SN74LVC240ADGVR at 3.3V?
The typical propagation delay (tpd) of SN74LVC240ADGVR is 6.5ns at VCC = 3.3V, –40°C to +85°C, as specified in the Switching Characteristics table. This value reflects worst-case delay from input (A) to output (Y) under loaded conditions (CL = 50pF), confirming SN74LVC240ADGVR's suitability for sub-100MHz digital signal redriving tasks in timing-critical paths.
Is SN74LVC240ADGVR compatible with 50pF capacitive loads?
Yes, SN74LVC240ADGVR is fully characterized and guaranteed to meet all electrical specifications - including tpd, VOL, and VOH - when driving loads ≤50pF. Exceeding this capacitance may degrade timing margins or increase VOL/VOH deviation; TI explicitly recommends staying within this limit for datasheet-compliant operation, as noted in Section 8.2.1.1.
SN74LVC240ADGVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74LVC
- Package/Case:
- 20-TFSOP (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:
- 1.65V ~ 3.6V
- Operating Temperature:
- -40°C ~ 125°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-TVSOP
SN74LVC240ADGVR FAQ
1.How can I place an order for SN74LVC240ADGVR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVC240ADGVR 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 SN74LVC240ADGVR reliable?
The price and inventory of SN74LVC240ADGVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVC240ADGVR is usually 5 days.
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SN74LVC240ADGVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVC240ADGVR 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 SN74LVC240ADGVR?
For technical support, including SN74LVC240ADGVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVC240ADGVR requirements.
6.How does Aetrix verify that SN74LVC240ADGVR is sourced from the original manufacturer or authorized distributors?
All SN74LVC240ADGVR 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 SN74LVC240ADGVR meets industry standards.
7.What is the process for return or replacement of SN74LVC240ADGVR?
All SN74LVC240ADGVR units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVC240ADGVR, 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 SN74LVC240ADGVR part is unused and in its original packaging.
Return procedure for SN74LVC240ADGVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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