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Texas Instruments SN74ABT2240ANSR
- Part No.:
- SN74ABT2240ANSR
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.209", 5.30mm Width)
- Datasheet:
-
SN74ABT2240ANSR.pdf
- Description:
- IC BUFFER INVERT 5.5V 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,614
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Product details
Overview
SN74ABT2240ANSR 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, each with active-low output-enable (OE), 25-Ω integrated series output resistors, ±12 mA output drive, and operation over –40°C to 85°C at 4.5–5.5 V supply.
For engineers reviewing the SN74ABT2240ANSR datasheet, SN74ABT2240ANSR pinout, SN74ABT2240ANSR application, or SN74ABT2240ANSR equivalent, this device is selected for high-density 3-state bus driving where reduced overshoot, low ground bounce (<1 V), and TTL-compatible input thresholds are required in industrial and embedded systems.
Technical Context
This device implements dual 4-bit noninverting buffers with symmetrical active-low OE controls per section. Each output includes a built-in 25-Ω series resistor to dampen signal reflections without external termination.
It uses EPIC-IIB BiCMOS technology to achieve low power dissipation while maintaining TTL-level input compatibility and 12 mA sink capability. Latch-up immunity exceeds 500 mA per JESD17, and ESD protection meets 2000 V (HBM) and 200 V (machine model).
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.5 V to 5.5 V - ensures robust operation across standard 5 V rail tolerances. |
| Output Drive | 12 mA sink / –24 mA source - supports direct interfacing with TTL and CMOS loads without external drivers. |
| Propagation Delay | 1 ns to 4.8 ns (tPLH/tPHL @ 5 V, 25°C) - enables high-speed bus buffering up to ~200 MHz data rates. |
| Output Series Resistor | 25 Ω integrated - eliminates need for external series termination resistors on PCB traces. |
| Operating Temperature | –40°C to +85°C - qualified for industrial-grade embedded and control applications. |
| Input Thresholds | VIL = 0.8 V, VIH = 2.0 V - matches standard TTL logic levels for seamless integration into legacy systems. |
| Ground Bounce (VOLP) | <1 V @ VCC = 5 V - minimizes noise coupling during simultaneous output switching. |
Pinout & Package
SOP (NS) package, 20-pin, 0.65 mm pitch, 7.5 mm × 13.0 mm body, 1.2 mm max height, RoHS-compliant NIPDAU lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Active-low output enable | Independent control of each 4-bit section; high = high-Z, low = enabled (noninverting pass). |
| 1A1–1A4, 2A1–2A4 | Data inputs | Two groups of four buffered inputs; each maps directly to corresponding Y outputs when OE is asserted. |
| 1Y1–1Y4, 2Y1–2Y4 | 3-state buffered outputs | Noninverting outputs with integrated 25-Ω series resistance; sink up to 12 mA. |
| VCC, GND | Power supply terminals | Single 5 V supply; decoupling recommended near pins 10 (GND) and 11 (VCC) per layout guidelines. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 25-Ω output series resistors | Eliminates external termination components and reduces PCB area and BOM count for point-to-point bus driving. |
| EPIC-IIB BiCMOS process | Combines bipolar speed and CMOS low static power - typical ICC = 0.5 µA in disabled state. |
| TTL-compatible input thresholds | VIL = 0.8 V / VIH = 2.0 V - interoperable with legacy 5 V TTL logic families without level-shifting. |
| High noise immunity | Vhys = 100 mV - suppresses false triggering from slow or noisy input transitions. |
| Robust latch-up and ESD performance | Exceeds 500 mA latch-up current (JESD17) and 2000 V HBM ESD - suitable for manufacturing and field-reliable systems. |
Applications
| Memory Address Buffering | Bus Transceiver Interface |
|---|---|
|
Use Scenario: Driving address lines from microcontroller or FPGA to multiple SRAM or Flash devices sharing a common address bus. IC Role / Device Role / Timing Role: Noninverting 3-state buffer providing fan-out expansion and isolation between master and slave devices. Use Value: Integrated 25-Ω resistors reduce trace ringing and eliminate discrete termination, improving signal integrity at 50–100 MHz address switching. |
Use Scenario: Bidirectional data bus isolation between processor and peripheral ICs using separate OE-controlled sections. IC Role / Device Role / Timing Role: Dual-section 3-state driver enabling time-multiplexed read/write direction control via 1OE and 2OE. Use Value: Low propagation delay (≤4.8 ns) and fast enable/disable times (≤6.8 ns) support tight timing budgets in synchronous bus protocols. |
| Legacy System Bus Expansion | Industrial Control Backplane Driver |
|
Use Scenario: Interfacing modern controllers to legacy ISA-style or parallel bus peripherals requiring TTL-level drive strength. IC Role / Device Role / Timing Role: Level-compatible buffer translating between newer logic families and older 5 V TTL systems. Use Value: Guaranteed VIH/VIL margins ensure reliable recognition of logic states despite voltage droop or noise on long backplane traces. |
Use Scenario: Driving distributed I/O modules over extended PCB traces or ribbon cables in PLC or motion control racks. IC Role / Device Role / Timing Role: Robust line driver with high-current sink capability and ground-bounce suppression for noisy industrial environments. Use Value: VOLP < 1 V and latch-up immunity >500 mA prevent system resets or data corruption during simultaneous output switching under EMI stress. |
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 |
|---|---|---|---|
| SN74ABT2244ANSR | Inverting output polarity; otherwise identical pinout, specs, and SOP-20 package. | Required where signal inversion is needed in bus direction control or complement generation. | Select SN74ABT2244ANSR only when inverted logic is explicitly required; not a drop-in replacement for noninverting use cases. |
| SN74LVC244APWR | 3.3 V only (1.65–3.6 V), lower drive (24 mA), no integrated series resistors, different input thresholds (VIH = 2.0 V @ VCC = 3.3 V). | Suitable for mixed-voltage 3.3 V systems but requires external termination and level-shifting for 5 V interfaces. | Choose SN74LVC244APWR for 3.3 V domains; avoid in pure 5 V or legacy TTL environments due to voltage and termination mismatch. |
Compared with SN74ABT2240ANSR, SN74ABT2244ANSR offers functional parity with polarity inversion, while SN74LVC244APWR shifts to 3.3 V operation and loses integrated termination - making the original part uniquely suited for cost-sensitive, high-integrity 5 V bus driving without layout changes.
Availability
SN74ABT2240ANSR is available at Aetrix Electronics and suitable for industrial control backplanes, memory subsystems, and legacy bus interface designs requiring stable component supply, long-lifecycle support, and RoHS-compliant packaging.
Supply support for SN74ABT2240ANSR 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 heritage in high-reliability logic families.
The ABT logic family - including SN74ABT2240ANSR - was engineered for high-speed, low-noise 5 V bus driving in memory, clock, and address distribution systems, emphasizing signal integrity and system-level noise immunity.
FAQ
What is the function of the 25-Ω series resistors in SN74ABT2240ANSR?
The 25-Ω series resistors are integrated into each output driver stage of the SN74ABT2240ANSR to dampen signal reflections on transmission lines. This eliminates the need for external series termination resistors, reducing PCB space, BOM count, and layout complexity while maintaining signal integrity on moderate-length traces driven at up to 100 MHz.
Can SN74ABT2240ANSR operate at 3.3 V?
No. The SN74ABT2240ANSR is specified only for 4.5 V to 5.5 V operation. Its input thresholds (VIH = 2.0 V, VIL = 0.8 V), output drive strength, and internal BiCMOS structure are optimized for 5 V TTL compatibility. Operating below 4.5 V may result in undefined logic states or degraded timing performance.
How should unused inputs be handled on SN74ABT2240ANSR?
All unused inputs on the SN74ABT2240ANSR must be tied to either VCC or GND to prevent floating nodes that could cause excessive current draw or erratic behavior. This requirement is documented in TI application report SCBA004 and applies to both data inputs (A1–A4) and output-enable inputs (1OE, 2OE) left unconnected in the design.
Is SN74ABT2240ANSR pin-compatible with SN74ABT2240ADBR or SN74ABT2240ADWR?
Yes - SN74ABT2240ANSR (SOP-20/NS), SN74ABT2240ADBR (SSOP-20/DB), and SN74ABT2240ADWR (SOIC-20/DW) share identical pinout, electrical specifications, and logic functionality. Differences are limited to package dimensions, thermal resistance, and reflow profile - allowing direct substitution where board layout accommodates the footprint.
What is the maximum capacitive load SN74ABT2240ANSR can drive reliably?
The SN74ABT2240ANSR is characterized with CL = 50 pF for timing measurements, and its 25-Ω series resistors provide inherent damping for typical PCB trace capacitance. While not explicitly rated for higher loads, empirical use shows stable operation up to ~80 pF with minimal overshoot - beyond which external termination or buffer staging is recommended.
SN74ABT2240ANSR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74ABT
- Package/Case:
- 20-SOIC (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:
- 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-SO
SN74ABT2240ANSR FAQ
1.How can I place an order for SN74ABT2240ANSR through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT2240ANSR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
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The price and inventory of SN74ABT2240ANSR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT2240ANSR is usually 5 days.
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Once your SN74ABT2240ANSR 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 SN74ABT2240ANSR?
For technical support, including SN74ABT2240ANSR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT2240ANSR requirements.
6.How does Aetrix verify that SN74ABT2240ANSR is sourced from the original manufacturer or authorized distributors?
All SN74ABT2240ANSR 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 SN74ABT2240ANSR meets industry standards.
7.What is the process for return or replacement of SN74ABT2240ANSR?
All SN74ABT2240ANSR units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT2240ANSR, 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 SN74ABT2240ANSR part is unused and in its original packaging.
Return procedure for SN74ABT2240ANSR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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