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Texas Instruments SN74ABT2240ADBLE
- Part No.:
- SN74ABT2240ADBLE
- Manufacturer:
- Texas Instruments
- Package:
- -
- Datasheet:
-
SN74ABT2240ADBLE.pdf
- Description:
- BUS DRIVER, ABT SERIES, 4-BIT
- Quantity:
- Payment:
- Shipping:
Inventory:6,000
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Product details
Overview
SN74ABT2240ADBLE from Texas Instruments is an octal noninverting buffer/line driver with 3-state outputs, designed for memory address and bus-oriented applications. It features dual 4-bit sections with independent active-low output-enable (OE) inputs, 25-Ω integrated series output resistors, ±12 mA output drive capability, and operation over –40°C to 85°C.
For engineers reviewing the SN74ABT2240ADBLE datasheet, SN74ABT2240ADBLE pinout, SN74ABT2240ADBLE application, or SN74ABT2240ADBLE equivalent, key selection criteria include 3-state bus interface compatibility, TTL-level input thresholds, low ground bounce (<1 V), high-speed propagation (tPLH/tPHL ≤ 4.8 ns), and SSOP-20 package constraints for space-constrained PCB layouts.
Technical Context
This device implements two independent 4-bit noninverting buffers, each with dedicated OE control. Outputs enter high-impedance state when OE is high; data passes inverted from A to Y when OE is low - confirming its role as a true inverting buffer per functional table and logic diagram.
It uses EPIC-IIB BiCMOS technology to achieve low power dissipation while maintaining TTL-compatible input thresholds (VIL = 0.8 V, VVIH = 2 V) and robust output drive (IOL = 12 mA, IOH = –24 mA at VCC = 5 V). The integrated 25-Ω series resistor suppresses overshoot/undershoot without external components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5 V to 5.5 V - ensures stable operation across standard 5-V TTL/CMOS systems with margin for supply variation. |
| Output Drive | IOL = 12 mA / IOH = –24 mA - supports direct connection to multiple TTL loads or stub-bus termination without external drivers. |
| Propagation Delay | tPLH/tPHL ≤ 4.8 ns @ 5 V - enables reliable operation in high-speed address/data bus applications up to ~200 MHz toggle rate. |
| 3-State Enable Time | tPZL ≤ 6.8 ns, tPHZ ≤ 6.4 ns - guarantees fast bus release and acquisition for time-critical multiplexed interfaces. |
| Input Thresholds | VIL = 0.8 V, VIH = 2.0 V - fully compatible with legacy TTL logic families and mixed-voltage system interfacing. |
| Ground Bounce | VOLP < 1 V @ 5 V, 25°C - minimizes noise coupling into shared VCC/GND planes during simultaneous switching. |
| ESD Rating | 2000 V HBM, 200 V MM - exceeds JEDEC standards for handling robustness in manufacturing and field environments. |
Pinout & Package
SN74ABT2240ADBLE is packaged in a 20-pin Shrink Small-Outline Package (SSOP-DB), 5.3 mm × 7.2 mm body, 0.65 mm pitch, 1.2 mm max height, RoHS-compliant with CU NIPDAU finish.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1OE, 2OE | Active-Low Output Enable | Independent control of each 4-bit section; high = high-Z output, low = enabled buffer path. |
| 1A1–1A4, 2A1–2A4 | Input Data Lines | Noninverting inputs for respective 4-bit sections; accept TTL/CMOS logic levels. |
| 1Y1–1Y4, 2Y1–2Y4 | Inverting Output Lines | Buffered, 3-state outputs with built-in 25-Ω series resistance to dampen signal reflections. |
| VCC (Pin 20) | Power Supply | 5-V nominal supply; decoupling required near pin for noise suppression and ground bounce mitigation. |
| GND (Pin 10) | Ground Reference | Common return for all signals and power; critical for minimizing ground bounce in high-speed switching. |
Key Features
| Feature | Design Value |
|---|---|
| Integrated 25-Ω Series Resistors | Eliminates need for external source termination resistors on PCB, reducing component count and layout complexity. |
| EPIC-IIB BiCMOS Process | Combines bipolar speed and CMOS low static power, achieving <1 V ground bounce and reduced ICCEX vs. pure bipolar designs. |
| High Fan-Out Capability | Drives ≥10 standard TTL loads per output, enabling direct connection to dense memory or peripheral address buses. |
| Latch-Up Immunity | Exceeds 500 mA per JESD17 - prevents destructive latch-up under transient overvoltage or ESD stress conditions. |
| Power-Up/Down High-Z Safety | OE tied to VCC via pullup ensures outputs remain high-impedance during supply ramp, preventing bus contention. |
Applications
| Memory Address Buffering | Bus Transceiver Interface |
|---|---|
|
Use Scenario: Driving 16-bit address lines from a microcontroller to multiple SRAM or ROM chips on a shared bus. IC Role / Device Role: Noninverting octal buffer providing level translation, fan-out expansion, and 3-state isolation between master and slave devices. Use Value: Integrated 25-Ω resistors suppress ringing on long traces; fast enable/disable times prevent bus conflicts during address switching. |
Use Scenario: Bidirectional data bus isolation between CPU and peripheral ICs using separate OE controls. IC Role / Device Role: Dual-section 3-state line driver enabling time-multiplexed read/write direction control without external logic. Use Value: Independent OE pins allow precise timing control of each 4-bit segment, supporting partial-word transfers and burst protocols. |
| Legacy System Bus Expansion | Industrial Control Backplane |
|
Use Scenario: Interfacing modern FPGA I/O banks to legacy 5-V TTL backplanes with strict voltage and timing requirements. IC Role / Device Role: Voltage-tolerant buffer translating between 3.3-V logic and 5-V bus standards while maintaining signal integrity. Use Value: TTL-compatible input thresholds and 12-mA sink capability ensure reliable recognition of older bus signaling without level shifters. |
Use Scenario: Distributing clock or strobe signals across modular PLC I/O racks with daisy-chained wiring. IC Role / Device Role: Low-skew, high-drive buffer delivering synchronized timing pulses to multiple modules with minimal jitter. Use Value: Sub-5-ns propagation delay and <1-V ground bounce maintain timing margins across noisy industrial EMI environments. |
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 |
|---|---|---|---|
| SN74ABT2240ADBR | Same die, identical electrical specs, DB package with tape-and-reel (2000 pcs), active status vs. DBLE's obsolete status. | Identical use cases; preferred for new production due to guaranteed availability and automated assembly support. | Select SN74ABT2240ADBR for volume manufacturing; DBLE is obsolete and unsuitable for new designs. |
| SN74ABT2244APWR | Complementary variant: dual 4-bit inverting buffer with same pinout, timing, and drive strength but inverted logic function. | Used where signal polarity inversion is required in bus drivers or clock distribution paths. | Choose SN74ABT2244APWR only if system logic requires inversion; otherwise, SN74ABT2240ADBR is direct functional replacement. |
Compared with SN74ABT2240ADBLE, SN74ABT2240ADBR offers assured supply continuity and SMT-ready packaging, while SN74ABT2244APWR provides matched performance for inverted-signal paths - both avoid obsolescence risks and support long-term design stability.
Availability
SN74ABT2240ADBLE is available at Aetrix Electronics and suitable for memory subsystem buffering, industrial backplane interfaces, and legacy TTL bus expansion requiring stable component supply and known timing behavior.
Supply support for SN74ABT2240ADBLE 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 innovation in high-speed interface and bus technologies.
The SN74ABT2240A family was developed to deliver high-density, low-noise 3-state buffering for memory and bus systems in computing, communications, and industrial control equipment.
FAQ
What is the operating temperature range for SN74ABT2240ADBLE?
The SN74ABT2240ADBLE is characterized for operation from –40°C to +85°C. This commercial-grade temperature range aligns with standard industrial ambient conditions and matches the SN74ABT2240A specification sheet. While the military-grade SN54ABT2240A extends to –55°C to +125°C, the SN74ABT2240ADBLE is not rated for those extremes.
Does SN74ABT2240ADBLE support true 3-state operation with independent section control?
Yes, SN74ABT2240ADBLE provides two independent 4-bit sections, each with its own active-low output-enable input (1OE and 2OE). When either OE is high, its corresponding Y outputs go to high-impedance; when low, the A-to-Y path is enabled with inversion. This allows selective bus driving without affecting the other section.
Is SN74ABT2240ADBLE pin-compatible with other packages in the ABT2240 family?
Yes, SN74ABT2240ADBLE shares identical pinout and functionality with all SN74ABT2240A variants in DB, DW, N, PW, and NS packages. Pin numbering, signal assignment, and electrical behavior are consistent across these packages - only mechanical dimensions and thermal characteristics differ.
What is the purpose of the 25-Ω series resistor integrated into each output of SN74ABT2240ADBLE?
The 25-Ω series resistor in each output of SN74ABT2240ADBLE serves as built-in source termination to reduce signal overshoot and undershoot on transmission lines. It eliminates the need for discrete resistors on the PCB, simplifying layout and improving signal integrity in high-speed bus applications without external component placement.
Can SN74ABT2240ADBLE be used in place of SN74ABT2240ADBR in new designs?
No - SN74ABT2240ADBLE is marked OBSOLETE by Texas Instruments, while SN74ABT2240ADBR is ACTIVE with full production support and tape-and-reel packaging. For new designs, SN74ABT2240ADBR is the recommended replacement; SN74ABT2240ADBLE should only be considered for legacy repair or spare-part fulfillment where no redesign is possible.
SN74ABT2240ADBLE 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:
- -
SN74ABT2240ADBLE FAQ
1.How can I place an order for SN74ABT2240ADBLE through Aetrix?
Please submit a Request for Quotation (RFQ) for SN74ABT2240ADBLE 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 SN74ABT2240ADBLE reliable?
The price and inventory of SN74ABT2240ADBLE are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for SN74ABT2240ADBLE is usually 5 days.
3.What payment methods are accepted for SN74ABT2240ADBLE?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for SN74ABT2240ADBLE transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for SN74ABT2240ADBLE?
SN74ABT2240ADBLE orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your SN74ABT2240ADBLE 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 SN74ABT2240ADBLE?
For technical support, including SN74ABT2240ADBLE datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your SN74ABT2240ADBLE requirements.
6.How does Aetrix verify that SN74ABT2240ADBLE is sourced from the original manufacturer or authorized distributors?
All SN74ABT2240ADBLE 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 SN74ABT2240ADBLE meets industry standards.
7.What is the process for return or replacement of SN74ABT2240ADBLE?
All SN74ABT2240ADBLE units undergo pre-shipment inspection (PSI). If there is an issue with SN74ABT2240ADBLE, 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 SN74ABT2240ADBLE part is unused and in its original packaging.
Return procedure for SN74ABT2240ADBLE:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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