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NXP Semiconductors 74ABT240D,602
- Part No.:
- 74ABT240D,602
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
74ABT240D,602.pdf
- Description:
- IC BUFFER INVERT 5.5V 20SO
- Quantity:
- Payment:
- Shipping:
Inventory:4,248
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Product details
Overview
74ABT240D,602 from NXP Semiconductors (formerly Philips) is an octal inverting 3-state buffer IC designed for high-speed bus interface applications. It provides dual independent 4-bit channels with separate output enables (1OE, 2OE), ±64mA/–32mA drive capability, 3.1ns typical propagation delay at 5V/50pF, and operates across –40°C to +85°C.
For engineers reviewing the 74ABT240D,602 datasheet, 74ABT240D,602 pinout, 74ABT240D,602 application, or 74ABT240D,602 equivalent, key selection criteria include 3-state bus driving performance, BiCMOS speed-power trade-off, live insertion support, latch-up immunity (>500mA), and SO20 package compatibility with legacy 74-series logic layouts.
Technical Context
The 74ABT240D,602 implements two independent 4-bit inverting buffer groups, each controlled by its own active-low output enable (1OE, 2OE). Its BiCMOS architecture delivers low static current (50µA in 3-state) while sustaining high-speed switching (≤4.3ns max tPLH/tPHL) under 50pF load.
It supports hot-plug operation via power-up 3-state behavior and robust ESD protection (2000V HBM, 200V MM). Input thresholds meet TTL-compatible levels (VIL ≤ 0.8V, VIH ≥ 2.0V), and absolute ratings allow VCC up to +7.0V with output current capability up to ±128mA per pin under defined conditions.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| VCC Range | 4.5V to 5.5V - ensures compatibility with standard 5V TTL/CMOS systems and tolerance against supply ripple. |
| tPLH / tPHL | 3.1ns typical (CL = 50pF, VCC = 5V) - enables reliable operation in high-frequency bus timing budgets up to ~200MHz. |
| IOL / IOH | +64mA / –32mA - drives heavy capacitive loads or multiple TTL inputs without external buffering. |
| CIN / COUT | 4pF / 7pF - minimizes loading on upstream drivers and reduces signal integrity degradation on stubbed buses. |
| ICCZ | 50µA max (VCC = 5.5V, outputs disabled) - enables low quiescent power in standby or 3-state hold modes. |
| Operating Temp | –40°C to +85°C - certified for industrial-grade embedded control, instrumentation, and telecom infrastructure use. |
Pinout & Package
74ABT240D,602 is housed in a 20-pin plastic small-outline (SO) package (SOT163-1), measuring 12.8mm × 7.5mm × 2.35mm, with 1.27mm pitch gull-wing leads suitable for surface-mount reflow assembly.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low output enables - independently disable Group 1 (pins 18,16,14,12) or Group 2 (pins 9,7,5,3) to isolate bus segments. |
| 2,4,6,8 | 1A0–1A3 | Inverting data inputs for first 4-bit channel - logic inversion applied before output buffering. |
| 11,13,15,17 | 2A0–2A3 | Inverting data inputs for second 4-bit channel - electrically isolated from Group 1 for dual-bus control. |
| 18,16,14,12 | 1Y0–1Y3 | Inverting 3-state outputs for Group 1 - high-impedance state when 1OE = HIGH. |
| 9,7,5,3 | 2Y0–2Y3 | Inverting 3-state outputs for Group 2 - independent control allows time-multiplexed or segmented bus access. |
| 10 | GND | Ground reference - must be low-inductance connection to minimize ground bounce during fast switching. |
| 20 | VCC | +5V supply - requires local 100nF ceramic decoupling adjacent to pin to suppress AC noise. |
Key Features
| Feature | Design Value |
|---|---|
| BiCMOS process | Combines bipolar speed and CMOS low static power - achieves 3.1ns delay with only 50µA ICCZ in 3-state mode. |
| Live insertion/extraction | Supported via power-up 3-state and robust ESD/latch-up protection - enables hot-swap backplane and modular system upgrades. |
| Dual independent OE controls | Enables selective bus arbitration - one group can drive while the other remains tri-stated, reducing contention and crosstalk. |
| Latch-up immunity | Exceeds 500mA per JEDEC Std 17 - prevents destructive latch-up during transient overvoltage or ground shift events. |
Applications
| Industrial Backplane Bus Interface | Legacy System Logic Translation |
|---|---|
Use Scenario: Interfacing microcontroller address/data buses to multi-slot industrial backplanes with long trace runs and variable load capacitance. IC Role / Device Role / Timing Role: Octal inverting 3-state buffer providing level-shifting, fanout expansion, and bus isolation between master and peripheral slots. Use Value: ±64mA drive sustains signal integrity across 15cm+ PCB traces; dual OE allows dynamic slot enable/disable without software overhead. | Use Scenario: Upgrading aging 74LS-based control panels with higher-speed, lower-power logic while retaining existing PCB layout and connectors. IC Role / Device Role / Timing Role: Pin-compatible drop-in replacement for 74LS240 with improved propagation delay and drive strength. Use Value: 3.1ns typical tPLH cuts setup/hold margins by >40% vs. 74LS240 (25ns), enabling faster cycle times without redesign. |
| Hot-Swappable Module Interface | Test Equipment Signal Conditioning |
Use Scenario: Enabling safe insertion/removal of I/O modules in programmable logic controllers (PLCs) operating under live power. IC Role / Device Role / Timing Role: Bus isolator that enters high-impedance state during power ramp-up and maintains it until stable VCC is detected. Use Value: Power-up 3-state behavior prevents bus contention during module power sequencing; latch-up immunity protects against insertion transients. | Use Scenario: Driving multiple parallel measurement channels (e.g., ADC inputs, relay drivers) from a single FPGA GPIO bank with limited sink/source capability. IC Role / Device Role / Timing Role: Output buffer amplifying weak FPGA signals to meet TTL input thresholds and drive 50Ω coaxial cables. Use Value: –32mA IOH and +64mA IOL ensure clean edge transitions into 50pF+ loads; low CIN (4pF) avoids degrading FPGA timing closure. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar octal inverting buffer applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| SN74ABT240N | DIP-20 package (SOT146-1); identical electrical specs and pinout. | Suitable for through-hole prototyping or legacy wave-soldered assemblies where SO mounting is impractical. | Select when manual assembly, breadboarding, or compatibility with older DIP footprints is required. |
| 74ABT240DB,118 | SSOP-20 package (SOT339-1); same logic function, timing, and drive, but 5.3mm × 5.3mm body with 0.65mm pitch. | Used in space-constrained industrial controllers where board area is prioritized over reworkability. | Select when footprint density exceeds SO20 limits and fine-pitch reflow capability is available. |
Compared with 74ABT240D,602, the SN74ABT240N offers identical functionality in DIP for prototyping, while 74ABT240DB,118 delivers the same performance in a smaller SSOP package - both require no logic or timing redesign but differ in mechanical integration and thermal profile.
Availability
74ABT240D,602 is available at Aetrix Electronics and suitable for industrial backplane interfaces, legacy system upgrades, hot-swappable PLC modules, and test equipment signal conditioning requiring stable component supply and long-term lifecycle assurance.
Supply support for 74ABT240D,602 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 delivering high-performance analog, logic, and interface solutions for automotive, industrial, and communication markets.
The 74ABT family was engineered for high-speed, low-power bus interfacing in industrial control and telecom infrastructure - combining BiCMOS speed with TTL compatibility and robustness for mission-critical environments.
FAQ
What is the maximum clock frequency supported by the 74ABT240D,602?
The 74ABT240D,602 does not operate as a clocked device but as a combinatorial buffer. Its 3.1ns typical propagation delay (tPLH/tPHL) at 5V/50pF supports reliable data transfer in bus systems with cycle times down to ~10ns - effectively enabling operation in 100MHz synchronous bus architectures when combined with appropriate setup/hold margins. The 74ABT240D,602 is not rated for continuous clocked operation like a flip-flop.
Does the 74ABT240D,602 support mixed-voltage operation (e.g., 3.3V inputs with 5V VCC)?
No - the 74ABT240D,602 is specified only for 4.5V to 5.5V VCC operation and TTL-compatible input thresholds (VIL ≤ 0.8V, VIH ≥ 2.0V). Applying 3.3V logic inputs is acceptable per VIH/VIL limits, but the device itself must be powered at 5V. It is not designed for 3.3V VCC operation, and doing so may result in undefined output behavior or reduced drive strength. The 74ABT240D,602 requires strict 5V supply compliance.
Can the 74ABT240D,602 replace a 74LS240 in an existing design?
Yes - the 74ABT240D,602 is a direct functional and pinout-compatible upgrade for the 74LS240 in SO20 packages. It matches the same pin configuration, logic function (octal inverting 3-state), and DC voltage levels, while improving propagation delay (3.1ns vs. 25ns typical), output drive (+64mA vs. +8mA), and power efficiency. No PCB changes are needed, though decoupling and layout best practices for high-speed logic should be verified. The 74ABT240D,602 retains full backward compatibility.
What is the meaning of "power-up 3-state" in the 74ABT240D,602 datasheet?
"Power-up 3-state" means the 74ABT240D,602 automatically places all outputs in high-impedance mode during power supply ramp-up - regardless of OE pin states - until VCC reaches a valid operating threshold (~2.1V). This prevents bus contention or glitching when multiple devices power up asynchronously. Once stable, outputs respond normally to OE control. This feature is intrinsic to the 74ABT240D,602's internal power-on reset circuitry and requires no external components.
Is the 74ABT240D,602 RoHS compliant and lead-free?
Yes - the 74ABT240D,602 (manufactured by NXP) meets RoHS Directive 2011/65/EU requirements and is lead-free, with matte tin (Sn) termination finish on its gull-wing leads. It complies with JEDEC J-STD-020 moisture sensitivity level (MSL) 3 and supports standard Pb-free reflow profiles (peak 260°C). Full compliance documentation, including substance declarations and test reports, is available from NXP upon request for the 74ABT240D,602.
74ABT240D,602 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74ABT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- 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,602 FAQ
1.How can I place an order for 74ABT240D,602 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ABT240D,602 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,602 reliable?
The price and inventory of 74ABT240D,602 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ABT240D,602 is usually 5 days.
3.What payment methods are accepted for 74ABT240D,602?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for 74ABT240D,602 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for 74ABT240D,602?
74ABT240D,602 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ABT240D,602 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,602?
For technical support, including 74ABT240D,602 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ABT240D,602 requirements.
6.How does Aetrix verify that 74ABT240D,602 is sourced from the original manufacturer or authorized distributors?
All 74ABT240D,602 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,602 meets industry standards.
7.What is the process for return or replacement of 74ABT240D,602?
All 74ABT240D,602 units undergo pre-shipment inspection (PSI). If there is an issue with 74ABT240D,602, 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,602 part is unused and in its original packaging.
Return procedure for 74ABT240D,602:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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