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Texas Instruments CY74FCT240TSOC
- Part No.:
- CY74FCT240TSOC
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CY74FCT240TSOC.pdf
- Description:
- IC BUFFER INVERT 5.25V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:939
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Product details
Overview
CY74FCT240TSOC from Texas Instruments is an octal 3-state noninverting buffer/line driver IC used for memory address driving, clock distribution, and bus transceiver applications. It operates at 4.75–5.25 V, delivers 64 mA sink / 32 mA source output drive, features Ioff partial-power-down protection, and achieves 8 ns max propagation delay (tPLH/tPHL) across –40°C to +85°C.
For engineers reviewing the CY74FCT240TSOC datasheet, CY74FCT240TSOC pinout, CY74FCT240TSOC application, or CY74FCT240TSOC equivalent, key selection criteria include TTL-compatible input/output levels, SOIC-20 package thermal performance (θJA = 58°C/W), edge-rate controlled noise immunity, and verified 3-state bus isolation behavior under partial power-down conditions.
Technical Context
The CY74FCT240TSOC implements dual 4-bit noninverting buffers with independent 3-state enable controls (OEA and OEB), supporting bidirectional bus interface via separate A- and B-side inputs/outputs. Its FCT-family architecture provides TTL-level compatibility while reducing power versus bipolar equivalents.
Edge-rate control circuitry limits dV/dt on outputs to suppress switching noise; Ioff logic disables outputs when VCC = 0 V to prevent backflow current during system power sequencing. Matched rise/fall times ensure clean signal integrity in high-speed digital buses.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.75–5.25 V - Ensures stable operation with standard 5 V rail tolerances and avoids overvoltage stress. |
| Max Propagation Delay | 8 ns - Enables reliable timing in 125 MHz bus systems with margin for trace skew and loading. |
| Output Sink/Source | 64 mA / 32 mA - Drives heavy capacitive loads (e.g., >10 TTL inputs) without external buffering. |
| Ioff Current | ±1 µA at VCC = 0 V - Prevents damaging backfeed current during hot-swap or partial power-down sequences. |
| ESD Rating | 2000-V HBM - Meets industrial-grade robustness requirements for board-level handling and field operation. |
| Operating Temperature | –40°C to +85°C - Qualified for commercial/industrial embedded systems including automotive body control modules. |
| Package Thermal θJA | 58°C/W (SOIC) - Supports continuous 100 mW dissipation at 70°C ambient without forced airflow. |
Pinout & Package
CY74FCT240TSOC is housed in a 20-pin SOIC (DW) package, 7.5 mm × 12.8 mm footprint, 2.65 mm max height, RoHS-compliant NiPdAu lead finish, MSL Level-1 (unlimited reflow).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | OEA, OEB | Active-low 3-state enables for A- and B-side outputs; both must be low for output drivers to activate. |
| 2, 4, 6, 8, 11, 13, 15, 17 | DA0–DA3, DB0–DB3 | Input terminals for A- and B-side data channels; TTL/CMOS compatible with 0.8 V/2.0 V thresholds. |
| 3, 5, 7, 9, 12, 14, 16, 18 | OA0–OA3, OB0–OB3 | Noninverting buffered outputs; high-impedance when corresponding OE is high. |
| 10 | GND | Power ground reference for all internal logic and output stages; requires low-inductance PCB connection. |
| 20 | VCC | 5 V supply input; decoupling capacitor (0.1 µF ceramic) required within 5 mm of this pin. |
Key Features
| Feature | Design Value |
|---|---|
| Edge-rate control | Reduces simultaneous switching noise (SSN) by limiting output slew rate without compromising 8 ns speed. |
| Ioff partial-power-down | Enables safe insertion/removal in live backplanes by disabling outputs and blocking reverse current at VCC = 0 V. |
| TTL-compatible I/O | Accepts 0.8 V/2.0 V input thresholds and drives 0.55 V/3.3 V output levels - interoperable with legacy 5 V logic families. |
| Matched tr/tf | Ensures symmetrical waveform edges, minimizing duty-cycle distortion in clock fanout applications. |
| 3-state bus isolation | Independent OEA/OEB controls allow selective activation of A- or B-side drivers for half-duplex bus arbitration. |
Applications
| Memory Address Drivers | Clock Distribution |
|---|---|
|
Use Scenario: Driving 16-bit address bus from microcontroller to SRAM or EPROM in industrial PLCs. IC Role / Device Role / Timing Role: Noninverting buffer isolating MCU pins from bus capacitance while maintaining setup/hold timing margins. Use Value: 64 mA sink capability ensures full-rail logic levels across 100 pF+ bus load; 8 ns delay enables ≤125 MHz addressing. |
Use Scenario: Fanout of system clock to multiple peripherals (UART, SPI, ADC) in medical instrumentation. IC Role / Device Role / Timing Role: Low-skew clock driver with matched rise/fall times preserving 50% duty cycle integrity. Use Value: Edge-rate control minimizes jitter induced by simultaneous switching; 3-state allows dynamic clock gating. |
| Bus Transceivers | Industrial I/O Expansion |
|
Use Scenario: Bidirectional data transfer between CPU and peripheral ASIC over shared 8-bit data bus in factory HMIs. IC Role / Device Role / Timing Role: Dual-channel 3-state line driver enabling direction-controlled bus access via OEA/OEB. Use Value: Independent enables permit time-multiplexed A/B side usage; Ioff prevents contention during power sequencing. |
Use Scenario: Interfacing microcontroller GPIOs to ruggedized 24 V digital inputs in motor control cabinets. IC Role / Device Role / Timing Role: Level-shifting buffer translating 3.3/5 V logic to isolated 24 V field-side drivers. Use Value: High noise immunity (2000-V HBM) withstands EMI in electrically noisy environments; SOIC package fits dense I/O modules. |
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 |
|---|---|---|---|
| SN74FCT240NSR | Same SOIC-20 package, identical pinout, but rated for 4.5–5.5 V supply and 48 mA/12 mA drive (CY54FCT240T spec). | Limited to lower-drive applications; unsuitable where 64 mA sink is required for long traces or heavy fanout. | Select only if system VCC tolerance exceeds ±5% or drive demand is ≤48 mA per output. |
| 74ACT240SCX | ACT-family device; higher ICC (1.4 mA typical), no Ioff, and 10 ns max delay - lacks partial-power-down safety. | Not suitable for hot-plug or mixed-voltage power domains; requires external isolation during power sequencing. | Prefer CY74FCT240TSOC where Ioff or industrial temperature range is mandatory. |
Compared with SN74FCT240NSR and 74ACT240SCX, CY74FCT240TSOC uniquely combines industrial temperature rating, Ioff-enabled safe power sequencing, and 64 mA drive in a standard SOIC-20 - making it optimal for bus-critical embedded systems requiring reliability under voltage transients and thermal stress.
Availability
CY74FCT240TSOC is available at Aetrix Electronics and suitable for memory address driving, clock distribution, and industrial bus transceiver applications requiring stable component supply, long-term lifecycle support, and RoHS-compliant sourcing.
Supply support for CY74FCT240TSOC 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 over 50 years of innovation in high-reliability digital interfaces.
CY74FCT240TSOC belongs to TI's FCT logic family, engineered for noise-immune, low-power 5 V bus interfacing in industrial control, communications infrastructure, and test equipment.
FAQ
What is the maximum operating temperature range for CY74FCT240TSOC?
CY74FCT240TSOC is specified for continuous operation from –40°C to +85°C ambient temperature. This range is validated per JEDEC JESD78 and supports deployment in industrial enclosures, factory automation controllers, and outdoor telecom equipment without derating.
Does CY74FCT240TSOC support partial-power-down mode?
Yes, CY74FCT240TSOC includes Ioff circuitry that disables outputs and limits leakage to ±1 µA when VCC = 0 V. This feature protects against backflow current during hot-swap events or staged power-up sequences in multi-rail systems.
What is the output drive strength of CY74FCT240TSOC?
CY74FCT240TSOC delivers 64 mA sink current and 32 mA source current per output at VCC = 4.75 V. This drive level supports direct interfacing with up to 10 standard TTL loads or 50 pF trace capacitance while maintaining VOH ≥ 2.4 V and VOL ≤ 0.55 V.
Is CY74FCT240TSOC pin-compatible with other FCT-series octal buffers?
CY74FCT240TSOC shares identical pinout and function with CY74FCT240ATSOCT and CY74FCT240CTSOCT, differing only in propagation delay (8 ns vs. 4.8 ns vs. 4.3 ns). All use SOIC-20 (DW) package and support same enable/control logic.
What package type and dimensions does CY74FCT240TSOC use?
CY74FCT240TSOC uses a 20-pin SOIC (DW) package: 7.5 mm × 12.8 mm body size, 2.65 mm max height, 1.27 mm lead pitch. It complies with JEDEC MS-013 and supports standard surface-mount reflow per IPC-J-STD-020 (MSL Level-1).
CY74FCT240TSOC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74FCT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Bulk
- 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, 64mA
- Voltage - Supply:
- 4.75V ~ 5.25V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
CY74FCT240TSOC FAQ
1.How can I place an order for CY74FCT240TSOC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY74FCT240TSOC 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 CY74FCT240TSOC reliable?
The price and inventory of CY74FCT240TSOC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT240TSOC is usually 5 days.
3.What payment methods are accepted for CY74FCT240TSOC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT240TSOC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY74FCT240TSOC?
CY74FCT240TSOC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY74FCT240TSOC 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 CY74FCT240TSOC?
For technical support, including CY74FCT240TSOC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT240TSOC requirements.
6.How does Aetrix verify that CY74FCT240TSOC is sourced from the original manufacturer or authorized distributors?
All CY74FCT240TSOC 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 CY74FCT240TSOC meets industry standards.
7.What is the process for return or replacement of CY74FCT240TSOC?
All CY74FCT240TSOC units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT240TSOC, 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 CY74FCT240TSOC part is unused and in its original packaging.
Return procedure for CY74FCT240TSOC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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