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Texas Instruments CY74FCT244CTSOCT
- Part No.:
- CY74FCT244CTSOCT
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CY74FCT244CTSOCT.pdf
- Description:
- IC BUF NON-INVERT 5.25V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:1,014
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Product details
Overview
CY74FCT244CTSOCT from Texas Instruments is an octal 3-state buffer/line driver IC used for memory address driving, clock distribution, and bidirectional bus interfacing in TTL- and CMOS-compatible systems. It features 64-mA sink / 32-mA source output drive, 4.1-ns max propagation delay (tPLH/tPHL), Ioff partial-power-down support, and edge-rate control for noise reduction.
For engineers reviewing the CY74FCT244CTSOCT datasheet, CY74FCT244CTSOCT pinout, CY74FCT244CTSOCT application, or CY74FCT244CTSOCT equivalent, key selection criteria include its SOIC-20 package, 4.75–5.25 V supply range, 3.3-V typical VOH, matched rise/fall times, and compatibility with FCT/F logic families in industrial bus-transceiver designs.
Technical Context
The CY74FCT244CTSOCT implements dual 4-bit noninverting buffers with independent 3-state enable controls (OEA, OEB), supporting high-speed bidirectional data flow on shared buses. Its edge-rate control circuitry limits slew rate to suppress simultaneous switching noise, while Ioff protection disables outputs during power-down to prevent backflow current.
It operates across –40°C to +85°C with TTL-compatible input thresholds (VIH = 2 V, VIL = 0.8 V) and delivers rail-to-rail output swing under load - VOH ≥ 2.4 V at –32 mA, VOL ≤ 0.55 V at 64 mA - enabling direct interface with 5-V TTL, NMOS, and CMOS logic without level-shifting components.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.75–5.25 V - ensures stable operation within standard 5-V TTL tolerance band and avoids overvoltage stress. |
| Propagation Delay | Max 4.1 ns (tPLH/tPHL) - enables reliable timing in high-speed address/data bus applications up to ~240 MHz. |
| Output Drive | 64 mA sink / 32 mA source - drives heavy capacitive loads (e.g., >100 pF traces or multiple TTL inputs) without signal degradation. |
| Ioff Current | ±1 µA at VCC = 0 V - prevents damaging back-current when powered down in mixed-voltage or hot-swap systems. |
| ESD Protection | 2000-V HBM, 200-V MM, 1000-V CDM - meets industrial robustness requirements for board-level handling and field operation. |
| Input Hysteresis | 0.2 V - improves noise immunity on slow-rising or noisy control lines such as OE signals in electrically harsh environments. |
Pinout & Package
Package: SOIC-20 (DW), 7.5 mm × 12.8 mm body, 1.27 mm pitch, 2.65 mm max height, RoHS-compliant NiPdAu lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 19 | OEA, OEB | Active-low 3-state enable inputs - independently control Group A (pins 2–9) and Group B (pins 18–11) outputs. |
| 2, 4, 6, 8 | DA0–DA3 | Group A data inputs - connect to upstream source (e.g., microcontroller port or address latch). |
| 3, 5, 7, 9 | OA0–OA3 | Group A noninverting buffered outputs - drive downstream bus segments or memory address lines. |
| 11, 13, 15, 17 | DB0–DB3 | Group B data inputs - support parallel or mirrored signal paths (e.g., dual-bank memory addressing). |
| 12, 14, 16, 18 | OB0–OB3 | Group B noninverting buffered outputs - provide isolated drive capability for secondary bus domains. |
| 10 | GND | Power ground reference - must be low-impedance connection to minimize ground bounce in high-speed switching. |
| 20 | VCC | Positive supply - decoupling capacitor (0.1 µF ceramic) required within 5 mm of this pin for noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Edge-rate controlled outputs | Reduces simultaneous switching noise (SSN) by limiting dV/dt - critical for maintaining signal integrity on dense PCBs with shared return paths. |
| Ioff partial-power-down | Enables safe insertion/removal in live backplanes or multi-rail systems where VCC may be sequenced or absent while other supplies remain active. |
| Matched rise/fall times | Ensures symmetrical waveform edges - minimizes duty-cycle distortion in clock distribution and reduces EMI emissions. |
| TTL/CMOS input compatibility | Accepts 0.8 V/2.0 V logic thresholds and drives 5-V TTL loads directly - eliminates need for external level translators in legacy system upgrades. |
| 3-state bus contention prevention | Dual independent OE pins allow interleaved access to shared data/address buses - essential for arbitration in multi-master or DMA-enabled architectures. |
Applications
| Memory Address Buffering | Industrial Bus Transceiver |
|---|---|
Use Scenario: Driving 16-bit address bus from a microcontroller to multiple SRAM or Flash devices in a PLC mainboard. IC Role / Device Role / Timing Role: Noninverting octal buffer isolating MCU address pins from bus capacitance and fanout loading. Use Value: 4.1-ns propagation delay and 64-mA sink capability ensure setup/hold timing margins are maintained across temperature and voltage extremes. |
Use Scenario: Bidirectional data transfer between two isolated CAN controller modules sharing a common local bus. IC Role / Device Role / Timing Role: Direction-controlled line driver/receiver enabling half-duplex communication without bus contention. Use Value: Independent OEA/OEB enables precise timing control of direction switching - preventing glitches during bus turnaround. |
| Legacy System Clock Distribution | Test Equipment Signal Conditioning |
Use Scenario: Distributing a 25-MHz system clock to multiple FPGA configuration peripherals in an automated test fixture. IC Role / Device Role / Timing Role: Low-skew clock buffer with edge-rate control to suppress jitter induced by trace coupling. Use Value: Matched rise/fall times and 0.2-V input hysteresis reduce clock duty-cycle distortion and improve PLL lock stability. |
Use Scenario: Conditioning digital stimulus signals from a pattern generator before injection into DUT's control interface. IC Role / Device Role / Timing Role: Output-isolated buffer protecting generator outputs from backdrive during DUT power faults. Use Value: Ioff support allows safe operation even when DUT is unpowered - eliminating risk of damage to expensive test instrumentation. |
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 |
|---|---|---|---|
| SN74FCT244CTSOCT | Same pinout, identical electrical specs, but manufactured by TI under legacy SN74 prefix - functionally identical part number variant. | No functional difference; used interchangeably in new designs and legacy BOMs requiring SN74-series marking. | Select when sourcing consistency with existing SN74-family documentation or procurement systems requires prefix alignment. |
| 74ACT244SCX | Higher VOH (≥3.8 V at –24 mA), slower tPLH/tPHL (max 9.5 ns), no Ioff or edge-rate control - ACT-family architecture. | Suitable only in static 5-V systems without partial-power-down needs; less noise-immune in high-density layouts. | Choose only if legacy ACT design reuse is mandatory and timing/noise margins permit relaxed specs. |
Compared with SN74FCT244CTSOCT and 74ACT244SCX, the CY74FCT244CTSOCT provides superior noise control via edge-rate limiting and guaranteed Ioff behavior - making it the preferred choice for industrial embedded systems requiring robust hot-swap and mixed-supply operation.
Availability
CY74FCT244CTSOCT is available at Aetrix Electronics and suitable for industrial control panels, test equipment signal conditioning, and legacy-system memory expansion requiring stable component supply with full lifecycle support and traceable sourcing.
Supply support for CY74FCT244CTSOCT 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 delivering analog, embedded processing, and connectivity solutions for industrial, automotive, and communications markets.
The CY74FCT244CTSOCT belongs to TI's FCT logic family - designed specifically for high-speed, low-noise 5-V TTL-compatible bus interfacing in mission-critical industrial and military-grade applications.
FAQ
What is the maximum operating temperature range for the CY74FCT244CTSOCT?
The CY74FCT244CTSOCT is rated for operation from –40°C to +85°C ambient temperature. This industrial temperature grade ensures reliable performance in programmable logic controllers, motor drives, and factory automation equipment exposed to wide thermal swings without derating.
Does the CY74FCT244CTSOCT support partial-power-down functionality?
Yes, the CY74FCT244CTSOCT includes Ioff circuitry that disables all outputs when VCC = 0 V, limiting Ioff current to ±1 µA. This feature protects the device and connected circuitry during hot-swap events or power sequencing mismatches in multi-rail systems - a key requirement for CY74FCT244CTSOCT deployment in modular backplane architectures.
What is the output drive strength of the CY74FCT244CTSOCT at 5 V supply?
At VCC = 4.75–5.25 V, the CY74FCT244CTSOCT delivers 64-mA sink current per output (IOL) and 32-mA source current (IOH). These values are specified under worst-case conditions and enable direct driving of up to 10 standard TTL loads or long PCB traces with >100-pF capacitance - confirming CY74FCT244CTSOCT suitability for high-fanout bus applications.
Is the CY74FCT244CTSOCT pin-compatible with earlier FCT-series buffers?
Yes, the CY74FCT244CTSOCT is functionally and physically pin-compatible with CY74FCT244T, CY74FCT244AT, and CY74FCT244DT variants in the same SOIC-20 package. Differences lie only in propagation delay (4.1 ns vs. 4.6/3.6 ns) and output drive - allowing drop-in replacement where timing margins permit, without layout changes for CY74FCT244CTSOCT integration.
What package type does the CY74FCT244CTSOCT use, and what are its key mechanical dimensions?
The CY74FCT244CTSOCT uses a SOIC-20 (DW) package: 7.5 mm × 12.8 mm body size, 2.65 mm maximum height, 1.27 mm lead pitch, and gull-wing leads. Its JEDEC MS-013-compliant footprint supports standard reflow profiles (Level-1, 260°C peak), and land pattern recommendations are published in TI's DW0020A package drawing - critical for ensuring solder joint reliability in CY74FCT244CTSOCT assembly.
CY74FCT244CTSOCT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74FCT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Logic Type:
- Buffer, Non-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
CY74FCT244CTSOCT FAQ
1.How can I place an order for CY74FCT244CTSOCT through Aetrix?
Please submit a Request for Quotation (RFQ) for CY74FCT244CTSOCT 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 CY74FCT244CTSOCT reliable?
The price and inventory of CY74FCT244CTSOCT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT244CTSOCT is usually 5 days.
3.What payment methods are accepted for CY74FCT244CTSOCT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT244CTSOCT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY74FCT244CTSOCT?
CY74FCT244CTSOCT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY74FCT244CTSOCT 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 CY74FCT244CTSOCT?
For technical support, including CY74FCT244CTSOCT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT244CTSOCT requirements.
6.How does Aetrix verify that CY74FCT244CTSOCT is sourced from the original manufacturer or authorized distributors?
All CY74FCT244CTSOCT 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 CY74FCT244CTSOCT meets industry standards.
7.What is the process for return or replacement of CY74FCT244CTSOCT?
All CY74FCT244CTSOCT units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT244CTSOCT, 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 CY74FCT244CTSOCT part is unused and in its original packaging.
Return procedure for CY74FCT244CTSOCT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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