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NXP Semiconductors 74ABT240D,623
- Part No.:
- 74ABT240D,623
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74ABT240D,623.pdf
- Description:
- IC BUFFER INVERT 5.5V 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:2,614
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Product details
Overview
74ABT240D,623 from NXP Semiconductors (formerly Philips) is an octal inverting 3-state buffer optimized for high-speed bus interface applications. It provides +64mA/–32mA output drive, 3.1ns typical propagation delay at 5V/50pF, and dual independent output enables (1OE, 2OE) controlling four outputs each. It operates across –40°C to +85°C in a 20-pin SO package.
For engineers reviewing the 74ABT240D,623 datasheet, 74ABT240D,623 pinout, 74ABT240D,623 application, or 74ABT240D,623 equivalent, key selection criteria include output drive strength, 3-state timing (tPZH/tPHZ), input/output capacitance (4pF/7pF), power-up 3-state behavior, and latch-up/ESD robustness per JEDEC 17 and MIL-STD-883.
Technical Context
The 74ABT240D,623 implements BiCMOS logic architecture to achieve low static/dynamic power with high-speed performance. Its dual 3-state control structure isolates two independent 4-bit inverting data paths, enabling selective bus segment activation without contention.
It supports live insertion/extraction and features power-up 3-state to prevent bus conflicts during power sequencing. Input clamp voltage is –0.9V (min), and absolute maximum VCC is +7.0V - ensuring compatibility with mixed-voltage system margins and transient tolerance.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation delay (tPLH/tPHL) | 3.1 ns typical at 5V/50pF - enables reliable 200+ MHz bus operation with margin |
| Output drive (IOL/IOH) | +64 mA / –32 mA - drives heavy capacitive loads and multiple TTL inputs |
| Input capacitance (CIN) | 4 pF - minimizes loading on upstream drivers and preserves signal integrity |
| 3-State leakage (IOZL/IOZH) | ±5 µA max at 5.5V - ensures clean bus isolation during disable |
| Supply current (ICCZ) | 50 µA max with outputs disabled - reduces standby power in idle bus segments |
| Operating temperature | –40°C to +85°C - qualified for industrial and extended commercial environments |
| VCC range | 4.5 V to 5.5 V - compatible with regulated 5V systems with ±10% tolerance |
Pinout & Package
20-pin plastic small-outline package (SO), SOT163-1, body width 7.5 mm, lead pitch 0.65 mm, RoHS-compliant.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low output enable controls four inverting outputs each; independent gating prevents bus contention |
| 2, 4, 6, 8 | 1A0–1A3 | Inverting input group 1 - connects to upstream data source for first 4-bit channel |
| 11, 13, 15, 17 | 2A0–2A3 | Inverting input group 2 - isolated second 4-bit channel for parallel or segmented bus use |
| 18, 16, 14, 12 | 1Y0–1Y3 | Inverting output group 1 - drives downstream bus segment with +64mA/–32mA capability |
| 9, 7, 5, 3 | 2Y0–2Y3 | Inverting output group 2 - electrically isolated output path with identical drive strength |
| 10 | GND | Reference ground for all I/O and supply - must be low-impedance for noise immunity |
| 20 | VCC | +5V supply rail - decoupling capacitor required within 1 cm for stable high-speed switching |
Key Features
| Feature | Design Value |
|---|---|
| Power-up 3-State | Outputs remain in high-impedance state until VCC stabilizes - eliminates bus glitches during power ramp |
| Live insertion/extraction | BiCMOS input protection allows hot-plug into live backplanes without damage or system disruption |
| Latch-up immunity | Exceeds 500 mA per JEDEC Std 17 - prevents destructive latch-up under transient overvoltage |
| ESD robustness | 2000 V HBM / 200 V MM - withstands handling and board-level ESD events without functional loss |
| Low dynamic power | ICCH = 250 µA max at 5.5V with outputs high - reduces heat generation in dense bus layouts |
Applications
| Industrial Bus Interface | Memory Address Buffering |
|---|---|
Use Scenario: Isolating microcontroller address/data buses from peripheral expansion slots in programmable logic controllers. IC Role / Device Role / Timing Role: Octal inverting 3-state buffer providing bidirectional bus separation with dual OE control for slot arbitration. Use Value: Prevents bus contention during hot-swap of I/O modules while maintaining <4.3 ns propagation delay for real-time cycle timing. | Use Scenario: Driving 8-bit address lines from a microprocessor to SRAM or EPROM in embedded instrumentation. IC Role / Device Role / Timing Role: Inverting buffer stage that strengthens weak address signals and adds controlled 3-state isolation during memory refresh cycles. Use Value: +64mA drive sustains signal integrity across 10+ cm PCB traces; 4pF CIN avoids clock skew on address setup. |
| Test Equipment Backplane | Digital Signal Acquisition System |
Use Scenario: Routing calibrated digital stimulus signals between modular instrument cards in automated test equipment. IC Role / Device Role / Timing Role: High-speed bus repeater with independent OE control per 4-bit lane to enable dynamic signal path reconfiguration. Use Value: 3.1ns tPLH ensures sub-5ns timing budget compliance; live insertion support enables card replacement without system shutdown. | Use Scenario: Interfacing FPGA-based acquisition logic to external ADC/DAC modules via shared parallel data bus. IC Role / Device Role / Timing Role: Direction-controlled inverting buffer managing data flow from FPGA to external converters with precise 3-state timing. Use Value: tPZH = 4.2ns (max) guarantees deterministic enable-to-valid-data window; latch-up immunity protects against converter fault currents. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal inverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT240DBR | TI SOIC-20 package; identical AC/DC specs but different thermal resistance (θJA = 75°C/W vs 90°C/W) | Same bus buffering function; slightly better thermal performance in high-density layouts | Preferred for thermally constrained PCBs where junction temperature rise must stay below 120°C at full drive |
| 74LVX240M | Lower VCC range (2.7–3.6V); 3.3V-only operation; 5.5ns max tPLH; reduced drive (±24mA) | Designed for 3.3V systems only; not 5V-tolerant; unsuitable for mixed-voltage or legacy 5V buses | Select only when migrating to 3.3V logic families and full 5V compatibility is not required |
Compared with SN74ABT240DBR and 74LVX240M, the 74ABT240D,623 delivers superior 5V bus drive (+64mA), faster propagation (3.1ns typ), and broader industrial temperature support (–40°C to +85°C), making it optimal for legacy and mixed-voltage industrial control designs.
Availability
74ABT240D,623 is available at Aetrix Electronics and suitable for industrial bus interface, memory address buffering, test equipment backplane, and digital signal acquisition systems requiring stable component supply and long-term lifecycle continuity.
Supply support for 74ABT240D,623 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
NXP Semiconductors is a global semiconductor leader focused on secure connectivity solutions for automotive, industrial, and IoT applications.
The 74ABT series was developed by Philips (now NXP) to deliver high-speed, high-drive BiCMOS logic for industrial-grade 5V bus interfacing - balancing speed, power efficiency, and ruggedness in harsh environments.
FAQ
What is the maximum operating voltage for the 74ABT240D,623?
The 74ABT240D,623 has an absolute maximum VCC rating of +7.0 V, but its recommended operating range is 4.5 V to 5.5 V. Operation outside the recommended range may compromise timing, drive strength, or reliability. The 74ABT240D,623 is not designed for sustained operation above 5.5 V, even though the absolute limit permits brief transients up to +7.0 V.
Does the 74ABT240D,623 support hot-swap or live insertion?
Yes, the 74ABT240D,623 explicitly supports live insertion and extraction per its datasheet. This is enabled by BiCMOS input protection structures and latch-up immunity exceeding 500 mA per JEDEC Std 17. The 74ABT240D,623 can be safely inserted into or removed from a powered-backplane environment without damaging the device or disrupting other system components.
What is the function of the two Output Enable pins (1OE and 2OE) on the 74ABT240D,623?
The 74ABT240D,623 features two independent active-low output enables: 1OE controls outputs 1Y0–1Y3, and 2OE controls outputs 2Y0–2Y3. This allows selective 4-bit segmentation of the octal bus - for example, enabling one half of the bus while tri-stating the other to avoid contention during multi-master arbitration. Both must be low for their respective outputs to be active and inverted.
Is the 74ABT240D,623 pin-compatible with standard 74-series octal buffers like the 74LS240?
No, the 74ABT240D,623 is not pin-compatible with 74LS240. While both are 20-pin octal inverting buffers, the 74ABT240D,623 uses a different pin configuration: inputs and outputs are interleaved (e.g., 1A0 at pin 2, 2Y0 at pin 3), whereas 74LS240 groups inputs and outputs separately. Substituting without PCB revision will cause functional failure. Always verify pin mapping before replacement.
What is the typical propagation delay of the 74ABT240D,623 under standard load conditions?
The 74ABT240D,623 has a typical propagation delay (tPLH/tPHL) of 3.1 ns when measured at VCC = 5.0 V with CL = 50 pF. This value is specified for transitions from input (nAx) to corresponding output (nYx) and reflects its high-speed BiCMOS design. The maximum delay across temperature and voltage is 4.3 ns, supporting reliable operation in systems requiring ≤5 ns timing budgets.
74ABT240D,623 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74ABT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- 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, 64mA
- Voltage - Supply:
- 4.5V ~ 5.5V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SO
74ABT240D,623 FAQ
1.How can I place an order for 74ABT240D,623 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ABT240D,623 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 74ABT240D,623 reliable?
The price and inventory of 74ABT240D,623 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ABT240D,623 is usually 5 days.
3.What payment methods are accepted for 74ABT240D,623?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ABT240D,623 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ABT240D,623?
74ABT240D,623 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ABT240D,623 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 74ABT240D,623?
For technical support, including 74ABT240D,623 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ABT240D,623 requirements.
6.How does Aetrix verify that 74ABT240D,623 is sourced from the original manufacturer or authorized distributors?
All 74ABT240D,623 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 74ABT240D,623 meets industry standards.
7.What is the process for return or replacement of 74ABT240D,623?
All 74ABT240D,623 units undergo pre-shipment inspection (PSI). If there is an issue with 74ABT240D,623, 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 74ABT240D,623 part is unused and in its original packaging.
Return procedure for 74ABT240D,623:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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