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Texas Instruments CY74FCT2240CTSOCE4
- Part No.:
- CY74FCT2240CTSOCE4
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CY74FCT2240CTSOCE4.pdf
- Description:
- IC BUFFER INVERT 5.25V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:4,171
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Product details
Overview
CY74FCT2240CTSOCE4 from Texas Instruments is an octal noninverting buffer/line driver with 3-state outputs, designed for memory address, clock, and bus interface applications. It features on-chip 25-Ω series output resistors, 4.1 ns typical propagation delay (tPLH/tPHL), ±15 mA output drive capability, Ioff support for partial-power-down operation, and TTL-compatible input/output voltage levels.
For engineers reviewing the CY74FCT2240CTSOCE4 datasheet, CY74FCT2240CTSOCE4 pinout, CY74FCT2240CTSOCE4 application, or CY74FCT2240CTSOCE4 equivalent, this device is selected for high-noise-immunity digital interfacing in industrial control, legacy bus systems, and mixed-voltage logic translation where controlled edge rates and low reflection noise are critical.
Technical Context
The CY74FCT2240CTSOCE4 implements dual independent 4-bit noninverting buffers, each with separate active-low output-enable controls (OEA and OEB). Its internal 25-Ω series termination at each output reduces transmission-line reflections without external components.
It supports full TTL-level compatibility (VIH = 2 V min, VIL = 0.8 V max) and operates across –40°C to +85°C with VCC = 4.75–5.25 V. The Ioff circuitry ensures <±1 µA leakage when VCC = 0 V, enabling safe back-drive protection during power sequencing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation delay | 4.1 ns max (tPLH/tPHL at VCC = 5 V, CL = 50 pF) - enables timing-critical bus driving up to ~100 MHz system clock domains. |
| Output drive | –15 mA source / +12 mA sink per pin - sufficient to directly drive 50-Ω transmission lines or fan-out to ≥10 TTL loads. |
| Output impedance | 20–40 Ω (ROUT at IOL = 12 mA) - matches PCB trace impedance to suppress ringing in high-speed routing. |
| Ioff current | ±1 µA at VCC = 0 V, VOUT = 4.5 V - prevents damaging back-current flow during hot-insertion or partial power-down. |
| ESD rating | 2000-V HBM, 200-V MM, 1000-V CDM - exceeds JEDEC JESD22 standards for robust handling in manufacturing and field environments. |
| Supply voltage | 4.75–5.25 V - tightly regulated 5-V operation compatible with legacy TTL and mixed-signal systems. |
| Operating temperature | –40°C to +85°C - qualified for industrial-grade embedded control and communications equipment. |
Pinout & Package
Package: 20-pin SOIC (SO) with standard JEDEC MS-013AC outline, body width 7.5 mm, pitch 1.27 mm. RoHS-compliant, NIPDAU lead finish, MSL Level-2-260°C-1 year.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4, 5, 6, 7, 8 | Data inputs DA0–DA3, DB0–DB3 | Noninverting TTL-compatible inputs accepting 0.8 V/2.0 V thresholds; drive internal buffer stages. |
| 9 | GND | Ground reference for all logic and output stages; must be low-impedance connection. |
| 10, 11, 12, 13, 14, 15, 16, 17 | Outputs OA0–OA3, OB0–OB3 | 3-state buffered outputs with integrated 25-Ω series resistor; high-Z when OE asserted. |
| 18 | VCC | 5-V supply pin; requires local 0.1 µF ceramic decoupling adjacent to pin. |
| 19 | OEB | Active-low output-enable control for OB0–OB3 group; asserts high-impedance state when high. |
| 20 | OEA | Active-low output-enable control for OA0–OA3 group; independent enable allows split-bus control. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip 25-Ω output series resistors | Eliminates need for eight discrete SMT resistors, reducing BOM count and PCB area while minimizing stub-induced reflections. |
| Edge-rate control circuitry | Slows output transitions relative to standard FCT logic, lowering di/dt and suppressing simultaneous switching noise (SSN). |
| Ioff partial-power-down support | Enables safe insertion into live backplanes or hot-swap subsystems by blocking reverse current when VCC is off. |
| TTL-input/output level compatibility | Direct interface with 74LS, 74ALS, and microcontroller GPIO without level-shifting or pull-up resistors. |
| High ESD immunity | 2000-V HBM rating ensures reliability during board assembly and field service without additional protection devices. |
Applications
| Memory Address Buffering | Legacy Bus Transceiver Interface |
|---|---|
|
Use Scenario: Driving 20-bit address bus from a microcontroller to multiple SRAM or EPROM chips in an industrial PLC. IC Role / Device Role / Timing Role: Noninverting buffer with split enable (OEA/OEB) isolating upper/lower address nibbles during page selection. Use Value: 4.1 ns propagation delay ensures setup/hold compliance at 25-MHz bus clocks; on-chip 25-Ω resistors suppress overshoot on 10-cm traces. |
Use Scenario: Interfacing ISA-bus peripherals to modern FPGA-based controllers in test instrumentation. IC Role / Device Role / Timing Role: Bidirectional bus driver translating between 5-V ISA signals and FPGA I/O banks with configurable voltage thresholds. Use Value: TTL-compatible VIH/VIL and ±15 mA drive allow direct connection without external level shifters or bus transceivers. |
| Clock Distribution Network | Mixed-Voltage Logic Translation |
|
Use Scenario: Distributing a 40-MHz system clock to four synchronous logic blocks with matched trace lengths. IC Role / Device Role / Timing Role: Low-skew, noninverting clock buffer with independent enables to gate clock delivery per subsystem. Use Value: Matched tPLH/tPHL (≤0.7 ns skew between outputs) maintains phase alignment; 25-Ω series termination damps resonance on unterminated stubs. |
Use Scenario: Connecting 3.3-V microcontroller GPIO to 5-V sensor interface circuits in automotive body control modules. IC Role / Device Role / Timing Role: Unidirectional level translator using TTL-input compatibility to accept 3.3-V logic highs as valid VIH (≥2 V). Use Value: No external pull-ups required; Ioff protects MCU pins during 5-V sensor power-up sequences before MCU initialization. |
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 |
|---|---|---|---|
| SN74FCT2240CTSO | Same pinout, identical electrical specs, TI second-source part with identical marking 'FCT2240C' and SOIC-20 package. | No functional difference; used interchangeably in legacy designs with same qualification and thermal profile. | Select when sourcing from alternate TI distribution channels or requiring identical TI branding without E4 suffix. |
| 74ACT240SCX | Higher drive (±24 mA), faster (3.5 ns), but no integrated 25-Ω resistors or Ioff; CMOS input thresholds (VIH = 3.5 V). | Requires external series resistors for reflection control; unsuitable for partial-power-down or 3.3-V input interfacing. | Choose only if higher speed and drive outweigh need for built-in termination and Ioff protection. |
Compared with SN74FCT2240CTSO and 74ACT240SCX, the CY74FCT2240CTSOCE4 uniquely combines on-die termination, Ioff safety, and TTL-level compatibility in a single SOIC-20 package-making it optimal for noise-sensitive industrial bus and memory interfaces where layout simplicity and power sequencing robustness are design priorities.
Availability
CY74FCT2240CTSOCE4 is available at Aetrix Electronics and suitable for industrial control systems, legacy bus adapters, and memory subsystems requiring stable component supply across extended temperature ranges and long production lifecycles.
Supply support for CY74FCT2240CTSOCE4 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 experience in industrial, automotive, and communications ICs.
The CY74FCT2240CTSOCE4 belongs to TI's FCT logic family-designed specifically for high-speed, low-noise, TTL-compatible digital interfacing in mission-critical industrial and telecom infrastructure.
FAQ
What is the maximum operating frequency supported by the CY74FCT2240CTSOCE4?
The CY74FCT2240CTSOCE4 does not specify a maximum clock frequency in its datasheet, as it is a combinational buffer-not a clocked device. However, its 4.1 ns propagation delay and 25-Ω output series resistance support clean signal integrity on PCB traces up to approximately 100 MHz fundamental frequencies in well-terminated systems. System-level timing margins depend on load capacitance, trace length, and termination scheme.
Does the CY74FCT2240CTSOCE4 support hot-swap or live-insertion applications?
Yes, the CY74FCT2240CTSOCE4 supports hot-swap applications via its Ioff feature: when VCC = 0 V, leakage current remains below ±1 µA even with up to 4.5 V applied to outputs. This prevents damaging back-current flow during insertion into powered backplanes or mixed-power-rail systems-making CY74FCT2240CTSOCE4 suitable for modular industrial I/O cards and field-replaceable units.
Can the CY74FCT2240CTSOCE4 drive 50-Ω transmission lines directly?
Yes-the CY74FCT2240CTSOCE4 integrates 25-Ω series resistors at each output, enabling direct drive of 50-Ω PCB traces or coaxial cables when paired with a 50-Ω load at the far end. This eliminates external series resistors and reduces signal reflections, making CY74FCT2240CTSOCE4 ideal for compact, high-density bus and clock distribution layouts.
What is the meaning of the 'E4' suffix in CY74FCT2240CTSOCE4?
The 'E4' suffix in CY74FCT2240CTSOCE4 denotes a specific tape-and-reel packaging variant per TI's ordering nomenclature: it indicates the device is supplied in a 2500-unit reel with SSOP-20 (DBQ) footprint, RoHS-compliant NIPDAU finish, and MSL Level-2 moisture sensitivity rating. The core silicon and electrical behavior are identical to CY74FCT2240CTSOC and CY74FCT2240CTSOCT variants.
How does the CY74FCT2240CTSOCE4 differ from the standard CY74FCT2240T?
The CY74FCT2240CTSOCE4 is the commercial-grade (–40°C to +85°C), SOIC-packaged, 4.1 ns speed grade variant of the CY74FCT2240T family. It replaces the generic 'T' suffix with 'C' (indicating FCT-advanced speed), 'T' (tape-and-reel), 'SOC' (SOIC), and 'E4' (specific reel configuration). Electrically and functionally, CY74FCT2240CTSOCE4 matches the CY74FCT2240CTSOCT datasheet-confirming identical timing, drive strength, and Ioff performance.
CY74FCT2240CTSOCE4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74FCT
- 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:
- 15mA, 12mA
- Voltage - Supply:
- 4.75V ~ 5.25V
- Operating Temperature:
- -40°C ~ 85°C (TA)
- Grade:
- -
- Qualification:
- -
- Mounting Type:
- Surface Mount
- Supplier Device Package:
- 20-SOIC
CY74FCT2240CTSOCE4 FAQ
1.How can I place an order for CY74FCT2240CTSOCE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY74FCT2240CTSOCE4 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 CY74FCT2240CTSOCE4 reliable?
The price and inventory of CY74FCT2240CTSOCE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT2240CTSOCE4 is usually 5 days.
3.What payment methods are accepted for CY74FCT2240CTSOCE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT2240CTSOCE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY74FCT2240CTSOCE4?
CY74FCT2240CTSOCE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY74FCT2240CTSOCE4 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 CY74FCT2240CTSOCE4?
For technical support, including CY74FCT2240CTSOCE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT2240CTSOCE4 requirements.
6.How does Aetrix verify that CY74FCT2240CTSOCE4 is sourced from the original manufacturer or authorized distributors?
All CY74FCT2240CTSOCE4 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 CY74FCT2240CTSOCE4 meets industry standards.
7.What is the process for return or replacement of CY74FCT2240CTSOCE4?
All CY74FCT2240CTSOCE4 units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT2240CTSOCE4, 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 CY74FCT2240CTSOCE4 part is unused and in its original packaging.
Return procedure for CY74FCT2240CTSOCE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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