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Texas Instruments SN74ABT2240ADWR
- Part No.:
- SN74ABT2240ADWR
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74ABT2240ADWR.pdf
- Description:
- IC BUFFER INVERT 5.5V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,352
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Product details
Overview
SN74ABT2240ADWR from Texas Instruments is an octal noninverting buffer/line driver with 3-state outputs, designed for memory address and bus-oriented applications. It features two independent 4-bit sections with separate active-low output-enable (OE) inputs, 25-Ω integrated series output resistors, ±12 mA output drive capability, and operates over –40°C to 85°C at 4.5–5.5 V supply.
For engineers reviewing the SN74ABT2240ADWR datasheet, SN74ABT2240ADWR pinout, SN74ABT2240ADWR application, or SN74ABT2240ADWR equivalent, this device supports high-density bus driving, clock distribution, and 3-state memory interface design with reduced signal integrity risk due to on-die termination.
Technical Context
This device implements dual 4-bit noninverting buffers with symmetrical active-low OE control per section. Each output incorporates a built-in 25-Ω series resistor to suppress overshoot/undershoot without external components. The EPIC-IIB BiCMOS process enables low power dissipation while maintaining TTL-compatible input thresholds and 5-V operation.
It delivers 12 mA sink and –24 mA source current per output, supports CL = 50 pF load conditions, and exhibits propagation delays as low as 1 ns (tPLH, typical) and enable/disable times under 2 ns (tPZH/tPLZ, typical), making it suitable for high-speed address and data bus buffering in industrial and embedded systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures compatibility with standard 5-V TTL and mixed-voltage logic systems. |
| Output Drive | 12 mA sink / –24 mA source - sufficient to drive multiple TTL loads or terminated transmission lines. |
| Propagation Delay | 1 ns (min) to 4.8 ns (max) - enables reliable operation in sub-10 ns timing-critical bus paths. |
| 3-State Enable Time | 1.1 ns (min) to 6.4 ns (max) - allows fast bus arbitration and dynamic output control. |
| Input Thresholds | VIL = 0.8 V, VIH = 2.0 V - matches standard TTL logic levels for seamless interfacing. |
| Integrated Termination | 25-Ω series output resistor - eliminates need for external series termination, reducing BOM count and PCB area. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade environmental reliability. |
Pinout & Package
SN74ABT2240ADWR is housed in a 20-pin SOIC (DW) package, 7.5 mm × 12.8 mm body size, 1.27 mm lead pitch, 2.65 mm max height, RoHS-compliant with NiPdAu lead finish and MSL Level-1 rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Active-low output-enable control | Independent enable for each 4-bit section; must be pulled high via resistor during power-up to ensure high-impedance state. |
| 1A1–1A4, 2A1–2A4 | Data inputs | Noninverting inputs for respective output groups; TTL-compatible voltage thresholds. |
| 1Y1–1Y4, 2Y1–2Y4 | 3-state buffered outputs | Outputs feature internal 25-Ω series resistance; capable of sinking 12 mA or sourcing –24 mA. |
| VCC, GND | Power supply terminals | Single 5-V supply; decoupling capacitor required near VCC pin for noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| On-die 25-Ω series termination | Eliminates external resistors for controlled-impedance line driving, reducing layout complexity and signal reflections. |
| EPIC-IIB BiCMOS process | Combines bipolar speed and CMOS low static power, achieving <1 V ground bounce (VOLP) at 5 V. |
| High fan-out capability | Supports >20 TTL loads per output, enabling direct connection to wide address/data buses without intermediate buffers. |
| Latch-up immunity | Exceeds 500 mA per JESD17 - ensures robustness against transient current faults in noisy industrial environments. |
| ESD protection | ≥2000 V HBM and ≥200 V machine model - enhances handling and board-level reliability during assembly and field operation. |
Applications
| Memory Address Buffering | Bus Transceiver Interface |
|---|---|
Use Scenario: Driving 20-bit address bus between microcontroller and SRAM/Flash in industrial PLC controller. IC Role / Device Role / Timing Role: Noninverting octal buffer providing level-shifted, slew-controlled, 3-state address signals with simultaneous enable control. Use Value: Integrated 25-Ω output resistors suppress ringing on long traces; dual OE pins allow interleaved bank selection without bus contention. | Use Scenario: Bidirectional data bus isolation between FPGA and legacy parallel peripheral in test equipment. IC Role / Device Role / Timing Role: Directionless 3-state driver enabling time-multiplexed read/write cycles on shared D[7:0] lines. Use Value: Sub-5 ns propagation delay and <7 ns disable time support 100+ MHz bus toggle rates; TTL-compatible thresholds simplify FPGA I/O configuration. |
| Clock Distribution Network | Legacy System Bus Expansion |
Use Scenario: Fan-out of system clock to multiple synchronous peripherals (ADC, DAC, UART) in medical imaging subsystem. IC Role / Device Role / Timing Role: Low-skew, low-jitter buffer replicating clock with matched trace-length drive capability. Use Value: Symmetrical rise/fall times and 25-Ω series termination minimize duty-cycle distortion and edge overshoot across all eight outputs. | Use Scenario: Adding ISA-compatible I/O expansion to retro-computing platform using modern microcontroller. IC Role / Device Role / Timing Role: Logic-level translator and bus driver bridging 3.3-V MCU GPIOs to 5-V ISA address/data lines. Use Value: 5-V tolerant inputs accept ISA bus voltages; 12 mA sink strength reliably pulls down legacy open-collector interrupt lines. |
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 |
|---|---|---|---|
| SN74ABT240N | Inverting output polarity; identical pinout, timing, and drive strength. | Requires logic inversion in upstream signal path; unsuitable where signal polarity must be preserved. | Select when inverted buffering is acceptable and board layout re-use is prioritized. |
| SN74LVC244APWR | 3.3-V only operation; lower drive (24 mA sink), no integrated series resistor. | Not 5-V tolerant; requires external termination and level-shifting for 5-V bus interfacing. | Prefer for new 3.3-V designs with tighter power budgets; avoid in mixed-voltage or legacy 5-V systems. |
Compared with SN74ABT240N and SN74LVC244APWR, SN74ABT2240ADWR uniquely combines noninverting logic, 5-V operation, integrated 25-Ω termination, and industrial temperature range-making it the only drop-in solution for legacy bus buffering where signal integrity and voltage compatibility are critical.
Availability
SN74ABT2240ADWR is available at Aetrix Electronics and suitable for memory address buffering, bus transceiver interfaces, clock distribution networks, and legacy system bus expansion requiring stable component supply and long-term industrial availability.
Supply support for SN74ABT2240ADWR 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 decades of industrial and automotive qualification expertise.
SN74ABT2240ADWR belongs to the ABT family of advanced BiCMOS bus-interface devices, engineered specifically for high-speed, low-noise, 3-state buffering in memory, clock, and data bus applications across industrial and communications infrastructure.
FAQ
What is the function of the 1OE and 2OE pins on the SN74ABT2240ADWR?
The 1OE and 2OE pins are active-low output-enable controls for the two independent 4-bit buffer sections of the SN74ABT2240ADWR. When pulled low, each section passes noninverted data from its A inputs to its Y outputs; when high, the corresponding Y outputs enter high-impedance state. To prevent output contention during power-up, TI recommends tying both OE pins to VCC via a pullup resistor - minimum value determined by the driver's current-sinking capability.
Does the SN74ABT2240ADWR require external series termination resistors?
No, the SN74ABT2240ADWR does not require external series termination resistors. Each output integrates an equivalent 25-Ω series resistor, explicitly designed to reduce overshoot and undershoot on transmission lines. This on-die termination simplifies PCB layout, reduces component count, and improves signal integrity in high-speed bus applications - a key differentiator versus standard TTL or LVC buffers like the SN74LVC244APWR.
What is the maximum output current specification for the SN74ABT2240ADWR?
The SN74ABT2240ADWR specifies a low-level output current (IOL) of 12 mA and a high-level output current (IOH) of –24 mA per output, tested under recommended operating conditions (VCC = 4.5–5.5 V, TA = –40°C to 85°C). These values reflect guaranteed drive strength into standard TTL loads and support fan-out to >20 TTL inputs. Exceeding these limits risks exceeding absolute maximum ratings and may degrade latch-up immunity.
Can the SN74ABT2240ADWR operate at 3.3 V?
No, the SN74ABT2240ADWR is not specified for 3.3-V operation. Its recommended supply voltage range is 4.5 V to 5.5 V, and its input thresholds (VIL = 0.8 V, VIH = 2.0 V) are optimized for 5-V TTL compatibility. Operating below 4.5 V may result in undefined logic behavior, increased propagation delay, or failure to meet output drive specifications. For 3.3-V systems, consider the SN74LVC244APWR - but note it lacks integrated termination and 5-V tolerance.
What package type and dimensions does the SN74ABT2240ADWR use?
The SN74ABT2240ADWR uses a 20-pin SOIC (DW) package: 7.5 mm × 12.8 mm body size, 1.27 mm lead pitch, 2.65 mm maximum height, with NiPdAu lead finish and RoHS compliance. It ships in large tape-and-reel format (2000 units per reel), with MSL Level-1 rating (unlimited floor life at ≤30°C/60% RH). The pin 1 index area is located at the top-left corner of the package marking side, consistent with JEDEC MS-013 standards.
SN74ABT2240ADWR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 20-SOIC (0.295", 7.50mm 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, 12mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
SN74ABT2240ADWR FAQ
1.How can I place an order for SN74ABT2240ADWR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT2240ADWR 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 SN74ABT2240ADWR reliable?
The price and inventory of SN74ABT2240ADWR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT2240ADWR is usually 5 days.
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SN74ABT2240ADWR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT2240ADWR 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 SN74ABT2240ADWR?
For technical support, including SN74ABT2240ADWR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT2240ADWR requirements.
6.How does Aetrix verify that SN74ABT2240ADWR is sourced from the original manufacturer or authorized distributors?
All SN74ABT2240ADWR 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 SN74ABT2240ADWR meets industry standards.
7.What is the process for return or replacement of SN74ABT2240ADWR?
All SN74ABT2240ADWR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT2240ADWR, 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 SN74ABT2240ADWR part is unused and in its original packaging.
Return procedure for SN74ABT2240ADWR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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