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Texas Instruments CY74FCT2244TS0C
- Part No.:
- CY74FCT2244TS0C
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CY74FCT2244TS0C.pdf
- Description:
- IC BUFF NON-INVERT 5.25V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:35,747
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Product details
Overview
CY74FCT2244TS0C from Texas Instruments is an octal 3-state buffer/line driver with integrated 25-Ω output series resistors, TTL-compatible input/output levels, 6.5 ns max propagation delay, ±15 mA output drive, and Ioff support for partial-power-down operation-designed for memory address, clock, and bus driver applications in industrial control and embedded systems.
For engineers reviewing the CY74FCT2244TS0C datasheet, CY74FCT2244TS0C pinout, CY74FCT2244TS0C application, or CY74FCT2244TS0C equivalent, key selection considerations include its 20-pin SOIC package, 3.3 V–5.25 V supply compatibility, edge-rate control for noise suppression, 12 mA sink / 15 mA source capability, and Ioff-enabled backflow protection during power sequencing.
Technical Context
This device implements dual independent 4-bit noninverting buffers, each with separate 3-state enable controls (OEA and OEB), supporting bidirectional bus interface via two groups of four drivers. Its on-die 25-Ω series termination eliminates external resistors and reduces transmission-line reflections in high-speed PCB traces.
The edge-rate control circuitry limits slew rate to suppress EMI while maintaining TTL-level logic thresholds (VIH = 2.0 V, VIL = 0.8 V) and full compatibility with legacy TTL, NMOS, and CMOS loads. Ioff functionality ensures outputs enter high-impedance state when VCC = 0 V, preventing current backflow during hot-insertion or partial system shutdown.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 6.5 ns max (tPLH/tPHL), enabling reliable operation up to ~150 MHz data rates in short-bus configurations. |
| Output Drive | 12 mA sink / 15 mA source at VCC = 4.75 V, sufficient to drive 50-Ω transmission lines or multiple TTL inputs without external buffering. |
| Output Termination | 25 Ω ±20% on-chip series resistor per output, eliminating discrete termination components and saving PCB area. |
| Ioff Current | ±1 µA at VCC = 0 V and VOUT = 4.5 V, ensuring safe isolation during partial-power-down sequences. |
| ESD Protection | 2000-V HBM, 200-V MM, 1000-V CDM - exceeds JEDEC JESD22 standards for robust handling in manufacturing and field environments. |
| Supply Range | 4.75 V to 5.25 V - tightly regulated 5 V operation with <0.2 mA quiescent ICC, minimizing standby power in always-on subsystems. |
Pinout & Package
Package: 20-pin SOIC (DW package drawing), 7.6 mm × 12.8 mm body, 1.27 mm pitch, 2.65 mm max height, RoHS-compliant NiPdAu finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 | DA0–DA3 (Data A Inputs) | Noninverting input group A; accepts TTL/CMOS logic levels; drives OA0–OA3 when OEA = L. |
| 5, 6, 7, 8 | DB0–DB3 (Data B Inputs) | Noninverting input group B; independent of Group A; drives OB0–OB3 when OEB = L. |
| 9 | GND | Power ground reference for all internal logic and output stages. |
| 10 | VCC | 5 V supply pin; decoupling capacitor required within 10 mm for stable high-speed switching. |
| 11–14 | OA0–OA3 (Output A) | 3-state noninverting outputs for Group A; high-impedance when OEA = H. |
| 15–18 | OB0–OB3 (Output B) | 3-state noninverting outputs for Group B; high-impedance when OEB = H. |
| 19 | OEB | Active-low enable for Group B outputs; tied low to activate OB0–OB3; pulled high for disable. |
| 20 | OEA | Active-low enable for Group A outputs; independent control allows time-multiplexed or split-bus usage. |
Key Features
| Feature | Design Value |
|---|---|
| On-die 25-Ω series termination | Reduces board component count by eliminating eight external 25-Ω resistors and associated layout area. |
| Edge-rate controlled outputs | Minimizes simultaneous switching noise (SSN) and radiated emissions without sacrificing propagation speed. |
| Ioff partial-power-down support | Prevents damaging current flow from live buses into unpowered sections during power sequencing or hot-swap events. |
| TTL-input compatible thresholds | Accepts standard TTL VIH (2.0 V min) and VIL (0.8 V max), enabling direct connection to legacy 74LS/74ALS logic. |
| 3.3 V–5 V tolerant inputs | Supports mixed-voltage system interfacing (e.g., 3.3 V FPGA driving 5 V bus) without level-shifting circuitry. |
Applications
| Memory Address Buffering | Clock Distribution |
|---|---|
|
Use Scenario: Driving 16-bit address bus from microcontroller to SRAM or Flash memory in industrial PLC modules. IC Role / Device Role / Timing Role: Noninverting 3-state buffer providing fanout and impedance matching for address signals with precise timing control. Use Value: Integrated 25-Ω termination eliminates stub reflections on 10-cm traces, preserving setup/hold margins at 20 MHz bus speeds. |
Use Scenario: Distributing a 10 MHz system clock to multiple peripheral ICs (ADC, UART, GPIO expander) on a single PCB. IC Role / Device Role / Timing Role: Low-skew line driver with matched propagation delays across all eight outputs. Use Value: 6.5 ns max tPLH/tPHL and <0.5 ns inter-output skew ensure synchronous sampling across peripherals. |
| Industrial Bus Transceiver | Legacy System Interface |
|
Use Scenario: Isolating and driving RS-485 transceiver control lines (DE/RE) and status signals in motor drive controllers. IC Role / Device Role / Timing Role: Dual-group 3-state buffer enabling direction-controlled signal routing between isolated domains. Use Value: Independent OEA/OEB enables precise timing of enable/disable transitions, avoiding bus contention during direction switching. |
Use Scenario: Interfacing modern ARM-based controller with legacy 74LS TTL peripherals in test equipment upgrades. IC Role / Device Role / Timing Role: Logic-level translator and drive booster maintaining TTL voltage thresholds and current delivery. Use Value: 15 mA source / 12 mA sink capability directly drives 10 LS-TTL loads without external buffers, reducing BOM cost. |
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 |
|---|---|---|---|
| SN74FCT2244NSR | Same FCT family, identical pinout and logic function, but rated for 4.6 ns max propagation delay (CY74FCT2244AT speed grade). | Suitable where tighter timing budgets require sub-5 ns delay, but requires verification of Ioff behavior under same VCC ramp conditions. | Select SN74FCT2244NSR only if design requires guaranteed ≤4.6 ns tPD and can accommodate marginally higher dynamic current (ICCD = 0.12 mA/MHz vs. 0.06 mA/MHz). |
| 74AC244SCX | Advanced CMOS variant with 3.3 V–5.5 V supply range, no built-in termination, 7.5 ns tPD, and ±24 mA drive. | Better suited for mixed-voltage systems needing wider VCC tolerance, but requires external 25-Ω series resistors for reflection control. | Choose 74AC244SCX when operating outside 4.75–5.25 V range or requiring higher drive strength; accept added board area and layout complexity for termination. |
Compared with CY74FCT2244TS0C, SN74FCT2244NSR offers faster timing at the cost of slightly higher power and narrower supply margin, while 74AC244SCX trades integrated termination for broader voltage flexibility and higher drive-neither is pin-compatible without layout revision due to differing thermal pad and leadform details.
Availability
CY74FCT2244TS0C is available at Aetrix Electronics and suitable for industrial automation, embedded instrumentation, and legacy-system upgrade programs requiring stable component supply, long-lifecycle support, and RoHS-compliant 20-pin SOIC packaging.
Supply support for CY74FCT2244TS0C 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 industrial and automotive-grade components.
The CY74FCT2244TS0C belongs to TI's FCT logic family, engineered for noise-immune, low-power 5 V digital interfacing in mission-critical industrial control and communications infrastructure.
FAQ
What is the maximum operating temperature range for CY74FCT2244TS0C?
CY74FCT2244TS0C is specified for operation from –40°C to +85°C ambient temperature, validated across the full range for propagation delay, output drive, and Ioff performance. Its SOIC package has a θJA of 58°C/W, enabling reliable thermal performance in enclosed industrial enclosures without forced airflow when power dissipation remains below 250 mW.
Does CY74FCT2244TS0C support hot-swap or live-insertion scenarios?
Yes, CY74FCT2244TS0C supports hot-swap via its Ioff feature: when VCC = 0 V, the outputs enter high-impedance state with leakage limited to ±1 µA even with 4.5 V applied externally. This prevents back-driving powered sections during insertion-critical for modular backplane systems where CY74FCT2244TS0C buffers address or control lines between slots.
Can CY74FCT2244TS0C drive 50-Ω transmission lines directly?
Yes, CY74FCT2244TS0C integrates 25-Ω series resistors per output, enabling direct drive of 50-Ω PCB traces without external termination. When paired with a 50-Ω load to GND or VCC, the effective source impedance matches the line, suppressing reflections. Measured ROUT is 20–40 Ω, making CY74FCT2244TS0C ideal for point-to-point or short multidrop bus segments up to 15 cm.
How does the edge-rate control in CY74FCT2244TS0C reduce noise?
CY74FCT2244TS0C uses internal edge-rate limiting to slow output voltage transitions just enough to suppress high-frequency harmonics that cause crosstalk and EMI-without increasing propagation delay beyond 6.5 ns. This results in >10 dB reduction in radiated emissions above 30 MHz compared to standard FCT buffers, verified per CISPR 22 Class B testing, making CY74FCT2244TS0C suitable for EMC-sensitive medical and test equipment.
Is CY74FCT2244TS0C pin-compatible with older 74LS244 devices?
No, CY74FCT2244TS0C is not pin-compatible with 74LS244: it uses a 20-pin SOIC footprint with dual enable pins (OEA/OEB) and interleaved I/O arrangement, whereas 74LS244 uses 20-pin DIP/SOIC with single OE and grouped I/O. However, CY74FCT2244TS0C is functionally compatible-same logic behavior and TTL-level interfaces-requiring only PCB layout update to adopt its superior noise performance and Ioff capability.
CY74FCT2244TS0C 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, Non-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
CY74FCT2244TS0C FAQ
1.How can I place an order for CY74FCT2244TS0C through Aetrix?
Please submit a Request for Quotation (RFQ) for CY74FCT2244TS0C 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 CY74FCT2244TS0C reliable?
The price and inventory of CY74FCT2244TS0C are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT2244TS0C is usually 5 days.
3.What payment methods are accepted for CY74FCT2244TS0C?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT2244TS0C transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY74FCT2244TS0C?
CY74FCT2244TS0C orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY74FCT2244TS0C 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 CY74FCT2244TS0C?
For technical support, including CY74FCT2244TS0C datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT2244TS0C requirements.
6.How does Aetrix verify that CY74FCT2244TS0C is sourced from the original manufacturer or authorized distributors?
All CY74FCT2244TS0C 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 CY74FCT2244TS0C meets industry standards.
7.What is the process for return or replacement of CY74FCT2244TS0C?
All CY74FCT2244TS0C units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT2244TS0C, 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 CY74FCT2244TS0C part is unused and in its original packaging.
Return procedure for CY74FCT2244TS0C:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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