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NXP Semiconductors 74ABT240DB,112
- Part No.:
- 74ABT240DB,112
- Manufacturer:
- NXP Semiconductors
- Package:
- 20-SSOP (0.209", 5.30mm Width)
- Datasheet:
-
74ABT240DB,112.pdf
- Description:
- IC BUFFER INVERT 5.5V 20SSOP
- Quantity:
- Payment:
- Shipping:
Inventory:3,244
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Product details
Overview
74ABT240DB,112 from NXP Semiconductors (formerly Philips) is an octal inverting 3-state buffer optimized for high-speed bus interface applications. It features dual output enables (1OE, 2OE), ±64mA/–32mA drive capability, 3.1ns typical propagation delay at 5V/50pF, and operates across –40°C to +85°C. It drives TTL/CMOS loads in memory address/data buses and backplane interfaces.
For engineers reviewing the 74ABT240DB,112 datasheet, 74ABT240DB,112 pinout, 74ABT240DB,112 application, or 74ABT240DB,112 equivalent, key selection criteria include verified 3-state timing (tPZH/tPHZ ≤ 4.8ns), latch-up immunity (>500mA), ESD robustness (2000V HBM), power-up 3-state behavior, and SO-20 (SOT163-1) package compatibility with industrial bus designs.
Technical Context
The 74ABT240DB,112 implements two independent 4-bit inverting buffer groups, each controlled by a dedicated output enable (1OE/2OE). Its BiCMOS architecture delivers low dynamic power while sustaining 3.1ns tPLH/tPHL at 5V with 50pF load.
It supports live insertion/extraction and exhibits power-up 3-state behavior-outputs remain high-impedance until VCC stabilizes above ~2.1V. Input clamp voltage is –1.2V (VIK), and absolute max VCC is +7.0V, enabling safe operation under transient overvoltage 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 tolerates supply ripple without functional degradation |
| tPLH / tPHL | 3.1ns typical (CL = 50pF, VCC = 5V) - enables reliable operation in >200MHz bus clock domains with margin |
| IOL / IOH | 64mA sink / –32mA source - drives heavy capacitive loads (e.g., 10+ TTL inputs) without signal integrity loss |
| CIN / COUT | 4pF input / 7pF output capacitance - minimizes loading on upstream drivers and reduces switching noise coupling |
| ICCZ | 50µA max (outputs disabled, VCC = 5.5V) - enables ultra-low static power in standby bus arbitration states |
| Operating Temp | –40°C to +85°C - certified for industrial-grade embedded control, instrumentation, and telecom infrastructure |
Pinout & Package
74ABT240DB,112 is housed in a 20-pin plastic SSOP Type II package (SOT163-1), 7.2mm × 5.3mm body, 0.65mm pitch, lead-free compatible.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | 1OE, 2OE | Active-low enables - independently control Group 1 (pins 18,16,14,12) and Group 2 (pins 9,7,5,3) outputs |
| 2,4,6,8 | 1A0–1A3 | Inverting data inputs for Group 1 - logic inversion applied before output buffering |
| 11,13,15,17 | 2A0–2A3 | Inverting data inputs for Group 2 - electrically isolated group for dual-bus segmentation |
| 18,16,14,12 | 1Y0–1Y3 | Inverted outputs for Group 1 - high-drive, 3-state outputs with 64mA sink capability |
| 9,7,5,3 | 2Y0–2Y3 | Inverted outputs for Group 2 - identical drive strength and timing to Group 1, enabling mirrored bus control |
| 10 | GND | Signal ground reference - must be low-inductance connection to minimize ground bounce during simultaneous switching |
| 20 | VCC | +5V supply - requires local 100nF ceramic decoupling within 5mm of pin to suppress AC supply noise |
Key Features
| Feature | Design Value |
|---|---|
| Power-up 3-State | Outputs remain high-impedance until VCC exceeds ~2.1V - prevents bus contention during power sequencing |
| Live Insertion Support | ESD and latch-up protection allow hot-plug into powered backplanes without damage or system reset |
| Dual Independent Enables | 1OE and 2OE permit selective activation of two 4-bit channels - enables time-multiplexed bus sharing |
| Latch-up Immunity | Exceeds 500mA per JEDEC Std 17 - ensures robustness against ground/power transients in noisy industrial environments |
Applications
| Memory Address Bus Driver | Backplane Data Interface |
|---|---|
Use Scenario: Driving 16-bit address lines from a microcontroller to multiple SRAM/ROM chips on a shared bus. IC Role / Device Role / Timing Role: Octal inverting buffer with 3-state control isolates address latches and prevents contention during bus turnaround. Use Value: 64mA sink current ensures fast edge rates into 50pF+ trace+load capacitance; dual OE allows staggered enable for reduced simultaneous switching noise. | Use Scenario: Interfacing CPU-side data bus to peripheral slots in a modular industrial controller backplane. IC Role / Device Role / Timing Role: Bidirectional bus driver with independent channel enables manages data flow between master and slave cards. Use Value: 3.1ns propagation delay and 4.8ns enable/disable times support 100+ MHz synchronous transfers; live insertion tolerance enables field-replaceable modules. |
| Legacy ISA Bus Buffer | TTL-Level Signal Translator |
Use Scenario: Level-shifting and driving ISA bus address/data lines in retro-computing or legacy test equipment. IC Role / Device Role / Timing Role: Inverting 3-state buffer matches ISA timing requirements and provides bus isolation during DMA cycles. Use Value: –40°C to +85°C rating ensures reliability in unregulated chassis environments; latch-up immunity withstands ISA slot ESD events. | Use Scenario: Converting 3.3V FPGA I/O signals to 5V TTL-compatible levels for legacy peripherals. IC Role / Device Role / Timing Role: Voltage-tolerant input (–1.2V to +7.0V) accepts 3.3V logic while sourcing/sinking 5V bus currents. Use Value: VIH = 2.0V and VIL = 0.8V guarantee clean recognition of 3.3V logic thresholds; 4pF CIN minimizes FPGA I/O loading. |
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 version in same SSOP-20 (PW) package; identical AC/DC specs but different thermal resistance (θJA = 110°C/W vs 125°C/W) | Valid for drop-in replacement where board layout uses TI's PW footprint; not pin-compatible with SOT163-1 mechanical outline | Select when sourcing from TI distribution channels or requiring TI-specific qualification documentation |
| 74LVT240DB,118 | NXP LVT variant: lower VCC range (2.7–3.6V), 3.3V-only operation, 2.8ns tPLH, but no 5V tolerance | Only suitable for 3.3V-only systems; incompatible with 5V buses or mixed-voltage backplanes | Choose only if migrating fully to 3.3V logic and requiring lower power consumption |
Compared with 74ABT240DB,112, SN74ABT240DBR offers identical electrical performance in a functionally equivalent package variant but requires mechanical verification, while 74LVT240DB,118 trades 5V compatibility for lower voltage operation and reduced propagation delay-making it unsuitable for legacy 5V bus upgrades.
Availability
74ABT240DB,112 is available at Aetrix Electronics and suitable for industrial control panels, telecom line cards, and legacy computing hardware requiring stable component supply and long-term obsolescence management.
Supply support for 74ABT240DB,112 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, with roots in Philips' pioneering logic portfolio.
The 74ABT series was engineered for high-speed, high-drive 5V bus interfacing in mission-critical industrial and telecom systems where reliability under electrical stress is non-negotiable.
FAQ
What is the maximum operating voltage for the 74ABT240DB,112?
The 74ABT240DB,112 has an absolute maximum DC supply voltage (VCC) of +7.0V, but its recommended operating range is strictly 4.5V to 5.5V. Operation outside this range may cause parametric shift or accelerated wear. The 74ABT240DB,112 is not rated for sustained 6V or higher operation despite the 7.0V absolute limit.
Does the 74ABT240DB,112 support hot-swap or live insertion?
Yes, the 74ABT240DB,112 supports live insertion and extraction per its datasheet specifications. This is enabled by integrated latch-up protection exceeding 500mA and ESD immunity of 2000V HBM. The 74ABT240DB,112 maintains functional integrity when inserted into a powered backplane, provided proper current-limiting and grounding practices are followed.
What is the propagation delay of the 74ABT240DB,112 under typical conditions?
The 74ABT240DB,112 exhibits a typical propagation delay (tPLH/tPHL) of 3.1ns when loaded with 50pF at VCC = 5.0V and Tamb = 25°C. Over the full temperature range (–40°C to +85°C) and VCC = 5.0V ±0.5V, the maximum guaranteed delay is 4.3ns, making the 74ABT240DB,112 suitable for sub-200MHz synchronous bus timing budgets.
How does the power-up 3-state feature work on the 74ABT240DB,112?
The 74ABT240DB,112 enters a high-impedance state at power-up until VCC rises above approximately 2.1V, regardless of OE pin states. This prevents bus contention during power sequencing. Once VCC exceeds this threshold, normal 3-state control resumes. The 74ABT240DB,112 implements this via internal voltage-monitoring circuitry tied to the BiCMOS substrate bias network.
Is the 74ABT240DB,112 pin-compatible with other packages in the 74ABT240 family?
No-the 74ABT240DB,112 uses the SOT163-1 SSOP-20 package, which has different mechanical dimensions and thermal characteristics than the DIP (SOT146-1), SO (SOT163-1 is *not* same as SO), or TSSOP (SOT360-1) variants. While all share identical pin functions and numbering, PCB footprints are not interchangeable. The 74ABT240DB,112 requires its specific SSOP-20 land pattern.
74ABT240DB,112 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- NXP Semiconductors
- Series:
- 74ABT
- Package/Case:
- 20-SSOP (0.209", 5.30mm 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-SSOP
74ABT240DB,112 FAQ
1.How can I place an order for 74ABT240DB,112 through Aetrix?
Please submit a Request for Quotation (RFQ) for 74ABT240DB,112 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 74ABT240DB,112 reliable?
The price and inventory of 74ABT240DB,112 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for 74ABT240DB,112 is usually 5 days.
3.What payment methods are accepted for 74ABT240DB,112?
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4.How is shipping managed for 74ABT240DB,112?
74ABT240DB,112 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your 74ABT240DB,112 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 74ABT240DB,112?
For technical support, including 74ABT240DB,112 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your 74ABT240DB,112 requirements.
6.How does Aetrix verify that 74ABT240DB,112 is sourced from the original manufacturer or authorized distributors?
All 74ABT240DB,112 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 74ABT240DB,112 meets industry standards.
7.What is the process for return or replacement of 74ABT240DB,112?
All 74ABT240DB,112 units undergo pre-shipment inspection (PSI). If there is an issue with 74ABT240DB,112, 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 74ABT240DB,112 part is unused and in its original packaging.
Return procedure for 74ABT240DB,112:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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