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Texas Instruments SN74ABT2240ADW
- Part No.:
- SN74ABT2240ADW
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
SN74ABT2240ADW.pdf
- Description:
- IC BUFFER INVERT 5.5V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:577
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Product details
Overview
SN74ABT2240ADW from Texas Instruments is an octal inverting buffer/line driver with 3-state outputs, designed for memory address and bus-oriented applications. It features dual 4-bit channels, symmetrical active-low output-enable (OE) inputs, 25-Ω integrated series output resistors, ±12 mA output drive, and operates from 4.5 V to 5.5 V over –40°C to 85°C.
For engineers reviewing the SN74ABT2240ADW datasheet, SN74ABT2240ADW pinout, SN74ABT2240ADW application, or SN74ABT2240ADW equivalent, this device supports high-density 3-state bus interfacing with reduced signal integrity issues due to on-die termination and low ground bounce (VOLP < 1 V).
Technical Context
This device implements two independent 4-bit inverting buffer sections, each with dedicated OE control. Each output sinks up to 12 mA and sources –24 mA (–32 mA for SN54 version), with built-in 25-Ω series resistance to suppress overshoot/undershoot without external components.
It uses EPIC-IIB BiCMOS technology for low power dissipation and high speed, with propagation delays as low as 1 ns (tPLH) and enable/disable times under 2 ns (tPZH, tPLZ). Latch-up immunity exceeds 500 mA per JESD17, and ESD protection meets 2000 V (MIL-STD-883) and 200 V (machine model).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - compatible with standard 5-V TTL and CMOS systems without level shifting |
| Output Drive | Sinks 12 mA / sources –24 mA - sufficient for driving multiple TTL loads or short PCB traces |
| Propagation Delay | tPLH/tPHL = 1–4.8 ns @ 5 V - enables high-speed bus buffering in memory and clock distribution |
| 3-State Enable Time | tPZH = 1.1–4.7 ns - ensures fast, glitch-free bus arbitration during state transitions |
| Integrated Termination | 25-Ω series resistor per output - eliminates need for external series resistors, reducing BOM count and layout area |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded and computing applications |
| Input Clamp Current | –18 mA - protects against negative transients at inputs without external diodes |
Pinout & Package
SN74ABT2240ADW is housed in a 20-pin SOIC (DW) package, 7.5 mm × 12.8 mm, 2.65 mm max height, with 1.27 mm pitch, RoHS-compliant NiPdAu lead finish, and MSL Level-1 rating.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Active-low output-enable control | Independent enables for each 4-bit section; must be pulled high via resistor during power-up to ensure high-impedance default |
| 1A1–1A4, 2A1–2A4 | Inverting data inputs | Eight total inputs; each inverted and driven to corresponding Y output when OE is low |
| 1Y1–1Y4, 2Y1–2Y4 | Inverting 3-state outputs | Eight buffered, terminated outputs; high-impedance when OE is high; include internal 25-Ω series resistance |
| GND (Pin 10), VCC (Pin 20) | Power supply terminals | Single 5-V supply; decoupling capacitor required near VCC/GND pins to suppress switching noise |
Key Features
| Feature | Design Value |
|---|---|
| On-die 25-Ω series termination | Eliminates external resistors for impedance matching, reducing layout complexity and cost |
| EPIC-IIB BiCMOS process | Combines bipolar speed and CMOS low static power - typical ICC = 0.5 µA in disabled state |
| Low ground bounce (VOLP < 1 V) | Minimizes noise coupling into shared ground planes during simultaneous switching |
| High latch-up immunity (> 500 mA) | Ensures robust operation in noisy industrial environments per JESD17 stress test |
| Wide operating temperature range | –40°C to +85°C - suitable for industrial control, networking, and embedded computing |
Applications
| Memory Address Buffering | Bus Transceiver Interface |
|---|---|
Use Scenario: Driving address lines from a microcontroller to multiple SRAM or flash devices on a shared bus. IC Role / Device Role / Timing Role: Inverting 3-state buffer providing fan-out expansion and isolation between master and slave devices. Use Value: Integrated 25-Ω termination reduces ringing on long address traces; fast enable/disable allows dynamic bus sharing without contention. | Use Scenario: Bidirectional data path control between FPGA and peripheral ICs using separate OE-controlled channels. IC Role / Device Role / Timing Role: Dual 4-bit inverting buffer enabling time-multiplexed data flow direction with precise timing control. Use Value: Sub-5 ns propagation delay and 2 ns enable timing support high-throughput parallel interfaces without added logic delay. |
| Clock Distribution Network | Legacy System Bus Isolation |
Use Scenario: Distributing a system clock to multiple synchronous peripherals while maintaining signal integrity. IC Role / Device Role / Timing Role: Low-skew inverting buffer with matched delay paths across all eight outputs. Use Value: Symmetrical tPLH/tPHL (1–4.8 ns) and low VOLP ensure clean clock edges across load variations. | Use Scenario: Isolating legacy ISA or PCI bus segments during hot-swap or power sequencing events. IC Role / Device Role / Timing Role: 3-state interface providing electrical decoupling and controlled bus release timing. Use Value: Fast disable (tPLZ = 1.9–6.2 ns) prevents bus contention during power-up/down sequences. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal inverting 3-state buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT2244ADW | Noninverting outputs; otherwise identical pinout, timing, and drive strength | Used where signal polarity preservation is required (e.g., direct address mirroring) | Select SN74ABT2244ADW when inverting logic is not desired; same SOIC-20 footprint and thermal profile |
| SN74LVC244APWR | 3.3-V only (1.65–3.6 V), lower drive (±24 mA), no integrated 25-Ω resistors | Targets modern low-voltage systems; requires external termination for clean edges | Choose SN74LVC244APWR for 3.3-V domains with space-constrained layouts; verify signal integrity with external resistors |
Compared with SN74ABT2244ADW and SN74LVC244APWR, SN74ABT2240ADW uniquely delivers 5-V compatibility, inverting logic, and on-die 25-Ω termination - making it optimal for legacy bus buffering where polarity inversion and signal integrity are jointly critical.
Availability
SN74ABT2240ADW is available at Aetrix Electronics and suitable for memory address buffering, bus transceiver interfaces, clock distribution networks, and legacy system bus isolation requiring stable component supply and industrial temperature support.
Supply support for SN74ABT2240ADW 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 delivering analog, embedded processing, and connectivity solutions with deep expertise in high-reliability logic and interface ICs.
The ABT family, including SN74ABT2240ADW, was engineered for high-speed, high-fan-out 3-state bus applications in industrial and computing systems requiring robust noise immunity and precise timing control.
FAQ
What is the function of the 1OE and 2OE pins on the SN74ABT2240ADW?
The 1OE and 2OE pins are active-low output-enable controls for the two independent 4-bit buffer sections. When pulled low, each section passes inverted data from its A inputs to its Y outputs. When high, the corresponding Y outputs enter high-impedance state. SN74ABT2240ADW requires external pull-up resistors on both OE pins to ensure safe high-Z default during power-up.
Does the SN74ABT2240ADW require external series resistors for signal integrity?
No. The SN74ABT2240ADW integrates 25-Ω series resistors on all eight Y outputs, eliminating the need for external termination components. This feature reduces PCB area, BOM count, and layout complexity while suppressing overshoot and undershoot on transmission lines up to moderate lengths.
What is the maximum output current capability of the SN74ABT2240ADW?
The SN74ABT2240ADW outputs can sink up to 12 mA per pin and source up to –24 mA (tested at –3 mA and –24 mA conditions). These values are specified over the full operating temperature range (–40°C to +85°C) and ensure reliable drive into standard TTL loads or short PCB traces without thermal derating.
Can the SN74ABT2240ADW operate at 3.3 V?
No. The SN74ABT2240ADW is specified only for 4.5 V to 5.5 V supply operation. Its EPIC-IIB BiCMOS architecture and input thresholds are optimized for 5-V TTL compatibility. For 3.3-V systems, consider SN74LVC244APWR or similar LVC-family alternatives - but note they lack integrated 25-Ω termination.
How does the SN74ABT2240ADW handle power-up sequencing?
The SN74ABT2240ADW has no internal power-on reset. To guarantee high-impedance outputs at power-up, OE pins must be tied to VCC through external pull-up resistors. The minimum resistor value depends on the driver's current-sinking capability - typically 4.7 kΩ to 10 kΩ suffices for most applications using SN74ABT2240ADW.
SN74ABT2240ADW Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- 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
SN74ABT2240ADW FAQ
1.How can I place an order for SN74ABT2240ADW through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT2240ADW 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 SN74ABT2240ADW reliable?
The price and inventory of SN74ABT2240ADW are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT2240ADW is usually 5 days.
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Once your SN74ABT2240ADW 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 SN74ABT2240ADW?
For technical support, including SN74ABT2240ADW datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT2240ADW requirements.
6.How does Aetrix verify that SN74ABT2240ADW is sourced from the original manufacturer or authorized distributors?
All SN74ABT2240ADW 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 SN74ABT2240ADW meets industry standards.
7.What is the process for return or replacement of SN74ABT2240ADW?
All SN74ABT2240ADW units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT2240ADW, 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 SN74ABT2240ADW part is unused and in its original packaging.
Return procedure for SN74ABT2240ADW:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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