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Texas Instruments SN74LVTT240DW
- Part No.:
- SN74LVTT240DW
- Manufacturer:
- Texas Instruments
- Package:
- -
- Datasheet:
-
SN74LVTT240DW.pdf
- Description:
- BUS DRIVER, LVT SERIES, 4-BIT
- Quantity:
- Payment:
- Shipping:
Inventory:9,050
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Product details
Overview
SN74LVTT240DW from Texas Instruments is a 3.3-V Advanced BiCMOS Technology (ABT) octal buffer/driver with dual 4-bit sections, 3-state outputs, and mixed-mode 5-V/3.3-V I/O compatibility. It delivers 64 mA low-level output drive at VCC = 3 V, supports live insertion, and operates from –40°C to 85°C in DW package for backplane and bus interface applications.
For engineers reviewing the SN74LVTT240DW datasheet, SN74LVTT240DW pinout, SN74LVTT240DW application, or SN74LVTT240DW equivalent, key selection criteria include 3-state enable timing (tPZH ≤ 5.7 ns), output ground bounce (VOLP < 0.8 V), latch-up immunity (>500 mA), and unregulated battery operation down to 2.7 V.
Technical Context
The SN74LVTT240DW implements two independent 4-bit noninverting buffers, each controlled by a dedicated active-low output-enable (OE) input. Its ABT architecture enables TTL-level inputs (VIH = 2 V, VIL = 0.8 V) while operating from a 3.3-V supply, allowing direct interfacing between 5-V legacy logic and 3.3-V systems without level shifters.
It features robust ESD protection, live-insertion support via controlled output turn-on/off timing, and guaranteed high-impedance state during power sequencing when OE is pulled up to VCC. Absolute maximum ratings include VI and VO tolerance up to 7 V and IOL up to 64 mA per output.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 2.7 V to 3.6 V - supports unregulated battery rails and tolerates supply droop without functional loss |
| IOL / IOH | 64 mA / –32 mA at VCC = 3 V - drives standard TTL loads directly with margin |
| tPLH / tPHL | 1 ns / 1.3 ns min, 4.1 ns / 4 ns max at VCC = 2.7 V - ensures timing closure in high-speed bus environments |
| VOLP (Ground Bounce) | < 0.8 V at VCC = 3.3 V, TA = 25°C - minimizes noise coupling into shared ground planes |
| Latch-Up Immunity | > 500 mA per JEDEC JESD-17 - prevents destructive latch-up under transient overvoltage conditions |
| Input Voltage Range (VI) | –0.5 V to 7 V - accepts 5-V TTL inputs safely with 3.3-V VCC, enabling mixed-voltage system integration |
Pinout & Package
SN74LVTT240DW is housed in a 20-pin plastic small-outline (DW) package with 1.27-mm lead pitch, 7.5-mm body width, and surface-mount gull-wing leads. The package supports automated assembly and provides thermal dissipation up to 1.6 W at TA = 55°C.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Active-low output-enable control | Each enables/disables one 4-bit buffer section; must be pulled up to VCC for safe power-up high-Z state |
| 1A1–1A4, 2A1–2A4 | Noninverting data inputs | Accept TTL-compatible logic levels (0.8 V/2 V thresholds); tolerate up to 7 V input voltage |
| 1Y1–1Y4, 2Y1–2Y4 | 3-state buffered outputs | Drive 5-V TTL loads with 64 mA sink capability; enter high-impedance when corresponding OE is high |
| GND (Pin 10), VCC (Pin 20) | Power supply terminals | Single-supply operation at 3.3 V; decoupling capacitor required close to Pin 20 for noise suppression |
Key Features
| Feature | Design Value |
|---|---|
| Mixed-mode 5-V/3.3-V I/O | Accepts 5-V TTL inputs and drives 5-V TTL loads while powered from 3.3-V rail - eliminates external level translators |
| Live insertion support | Controlled output turn-on/off timing (tPZL/tPHZ ≤ 5.8 ns) prevents bus contention during hot-plug events |
| Low static power | ICC = 0.12 mA typical in 3-state mode - reduces system standby power in multi-device bus configurations |
| High noise immunity | VOLP < 0.8 V and VIK = –1.2 V - suppresses ground bounce and withstands negative input transients |
| Wide VCC operating range | Functional from 2.7 V to 3.6 V - accommodates aging batteries and supply ripple in portable industrial equipment |
Applications
| Backplane Bus Interface | Industrial PLC I/O Module |
|---|---|
Use Scenario: Isolating and driving address/data lines across a 16-bit parallel backplane with multiple slot cards. IC Role / Device Role / Timing Role: Noninverting 3-state buffer providing bidirectional signal integrity and bus contention control. Use Value: Enables 5-V legacy peripheral cards to coexist on a 3.3-V controller backplane without level-shifting circuitry. |
Use Scenario: Interfacing microcontroller GPIOs to 24-V digital input modules with TTL-compatible sensing thresholds. IC Role / Device Role / Timing Role: Level-translating buffer with high noise immunity for industrial field-side signal conditioning. Use Value: Tolerates 7-V input transients and delivers 64 mA drive to sink optocoupler LEDs reliably. |
| Hot-Swappable Card Cage | Legacy System Upgrade Bridge |
Use Scenario: Enabling safe insertion/removal of add-in cards in telecom line cards without disrupting active bus traffic. IC Role / Device Role / Timing Role: Live-insertion–qualified 3-state driver managing bus arbitration during card presence detection. Use Value: Guaranteed tPZL ≤ 5.8 ns and controlled output ramping prevent glitches during hot-swap transitions. |
Use Scenario: Migrating a 5-V CPU motherboard design to 3.3-V core logic while retaining 5-V peripheral interfaces. IC Role / Device Role / Timing Role: Voltage-domain translator buffering control and status signals between voltage domains. Use Value: Eliminates discrete resistor-divider networks and improves timing predictability versus passive translation. |
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 |
|---|---|---|---|
| SN74LVT240DBR | Same ABT architecture but in DB package (4.4-mm width); lower thermal dissipation (0.6 W vs. 1.6 W) | Preferred for space-constrained PCBs where board area is critical and power density is low | Select SN74LVT240DBR only if footprint reduction outweighs thermal headroom requirements |
| 74ALVC240PW | Lower drive (24 mA IOL), no 5-V tolerant inputs, 1.65–3.6 V VCC range; uses ALVC CMOS process | Suitable for pure 3.3-V systems without legacy 5-V interface needs | Choose 74ALVC240PW only when mixed-voltage operation is unnecessary and cost is prioritized over robustness |
Compared with SN74LVTT240DW, SN74LVT240DBR saves board area but sacrifices thermal margin, while 74ALVC240PW reduces cost and power but forfeits 5-V input tolerance and live-insertion capability - making SN74LVTT240DW the sole choice for mixed-voltage hot-swap bus interfaces.
Availability
SN74LVTT240DW is available at Aetrix Electronics and suitable for backplane bus interfaces, industrial PLC I/O modules, hot-swappable card cages, and legacy system upgrade bridges requiring stable component supply, long-term lifecycle support, and verified mixed-voltage interoperability.
Supply support for SN74LVTT240DW 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 company founded in 1930, specializing in analog, embedded processing, and logic solutions for industrial, automotive, and communications markets.
The SN74LVTT240DW belongs to TI's ABT logic family, engineered specifically for seamless interoperability between 3.3-V logic cores and 5-V legacy systems in high-reliability industrial backplanes and modular equipment.
FAQ
What is the recommended power-up sequence for SN74LVTT240DW?
TI recommends tying both 1OE and 2OE to VCC through a pullup resistor (value determined by driver sink capability) to ensure outputs remain in high-impedance state during power-up. This prevents bus contention before the controlling logic initializes. The SN74LVTT240DW does not require strict VCC ramp rate control, but stable 2.7–3.6 V supply must be established before applying input signals.
Does SN74LVTT240DW support 5-V inputs while powered from 3.3 V?
Yes, SN74LVTT240DW explicitly supports 5-V TTL input levels with VCC = 3.3 V. Its input voltage range extends to 7 V, and VIH is specified at 2 V minimum - ensuring reliable recognition of 5-V logic highs without external clamping or level shifting. This is a core feature of the ABT architecture used in SN74LVTT240DW.
What is the maximum output current rating for SN74LVTT240DW?
The SN74LVTT240DW is rated for 64 mA low-level output current (IOL) per pin at VCC = 3 V, and –32 mA high-level output current (IOH). These values are guaranteed across the full operating temperature range (–40°C to 85°C) and represent worst-case drive capability into standard TTL loads, as confirmed in the SCES005 datasheet.
Can SN74LVTT240DW be used in hot-swap applications?
Yes, SN74LVTT240DW is explicitly characterized for live insertion. Its enable/disable timing parameters (tPZL ≤ 5.8 ns, tPHZ ≤ 5.7 ns) and controlled output transition behavior prevent bus glitches during card insertion. TI confirms this capability in the device description and application notes tied to SN74LVTT240DW.
What package type does SN74LVTT240DW use, and what are its dimensions?
SN74LVTT240DW uses a 20-pin plastic small-outline (DW) package with 1.27-mm lead pitch and 7.5-mm body width. Its JEDEC MS-013AC footprint has 6.0-mm length, 7.5-mm width, and 2.35-mm height, supporting standard SMT reflow profiles and automated optical inspection for high-yield manufacturing of SN74LVTT240DW assemblies.
SN74LVTT240DW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- *
- Package/Case:
- -
- Packaging:
- Bulk
- Product Status:
- Active
- Logic Type:
- -
- Number of Elements:
- -
- Number of Bits per Element:
- -
- Input Type:
- -
- Output Type:
- -
- Current - Output High, Low:
- -
- Voltage - Supply:
- -
- Operating Temperature:
- -
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- -
- Supplier Device Package:
- -
SN74LVTT240DW FAQ
1.How can I place an order for SN74LVTT240DW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74LVTT240DW 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 SN74LVTT240DW reliable?
The price and inventory of SN74LVTT240DW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74LVTT240DW is usually 5 days.
3.What payment methods are accepted for SN74LVTT240DW?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74LVTT240DW transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74LVTT240DW?
SN74LVTT240DW orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74LVTT240DW 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 SN74LVTT240DW?
For technical support, including SN74LVTT240DW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74LVTT240DW requirements.
6.How does Aetrix verify that SN74LVTT240DW is sourced from the original manufacturer or authorized distributors?
All SN74LVTT240DW 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 SN74LVTT240DW meets industry standards.
7.What is the process for return or replacement of SN74LVTT240DW?
All SN74LVTT240DW units undergo pre-shipment inspection (PSI). If there is an issue with SN74LVTT240DW, 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 SN74LVTT240DW part is unused and in its original packaging.
Return procedure for SN74LVTT240DW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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