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Texas Instruments CY74FCT2244TSOCTE4
- Part No.:
- CY74FCT2244TSOCTE4
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CY74FCT2244TSOCTE4.pdf
- Description:
- IC BUF NON-INVERT 5.25V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:2,365
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Product details
Overview
CY74FCT2244TSOCTE4 from Texas Instruments is an octal noninverting 3-state buffer/line driver with on-chip 25-Ω series output resistors, TTL-compatible input/output levels, 6.5 ns max propagation delay, ±15 mA output drive, and Ioff partial-power-down support. It serves as a memory address driver, clock driver, or bus transmitter in high-speed digital systems.
For engineers reviewing the CY74FCT2244TSOCTE4 datasheet, CY74FCT2244TSOCTE4 pinout, CY74FCT2244TSOCTE4 application, or CY74FCT2244TSOCTE4 equivalent, key selection criteria include 3-state bus interface capability, integrated termination for reflection suppression, Ioff-enabled system-level power sequencing, and SOIC-20 compatibility with legacy FCT logic families.
Technical Context
This device implements dual independent 4-bit noninverting buffers, each controlled by separate 3-state enable inputs (OEA and OEB). Its edge-rate control circuitry limits slew rate to reduce EMI and transmission-line ringing without external components.
The 25-Ω on-die series resistors at all eight outputs match standard PCB trace impedances, eliminating discrete termination and reducing board space. Ioff functionality ensures high-impedance outputs when VCC = 0 V, preventing back-drive current during partial power-down sequences.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | 6.5 ns max (tPLH/tPHL), enabling reliable operation in 150+ MHz bus systems |
| Output Drive | 12 mA sink / 15 mA source, sufficient to drive 50-Ω transmission lines and TTL/NMOS loads |
| Supply Voltage | 4.75–5.25 V, compatible with standard 5-V logic rails and tolerant of rail droop |
| Input Logic Levels | TTL-compatible: VIH = 2.0 V min, VIL = 0.8 V max - interfaces directly with legacy 5-V logic |
| Output Termination | 25 Ω ±20% on-chip series resistor per output - eliminates need for external termination resistors |
| Ioff Current | ±1 µA at VCC = 0 V - prevents damaging back-current during hot-insertion or partial power-down |
| ESD Protection | 2000-V HBM, 200-V MM, 1000-V CDM - exceeds JEDEC JESD22 requirements for industrial environments |
Pinout & Package
Package: SOIC-20 (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, 5, 6, 7, 8 | DA0–DA3, DB0–DB3 | Data inputs for two independent 4-bit channels |
| 9 | GND | Ground reference for logic and power return path |
| 10, 11, 12, 13, 14, 15, 16, 17 | OA0–OA3, OB0–OB3 | Noninverting 3-state outputs - each includes 25-Ω series resistor |
| 18 | OEB | Active-low 3-state enable for OB0–OB3 channel |
| 19 | VCC | 5-V supply input - powers internal logic and output drivers |
| 20 | OEA | Active-low 3-state enable for OA0–OA3 channel |
Key Features
| Feature | Design Value |
|---|---|
| On-chip 25-Ω output resistors | Reduces PCB component count and layout area while suppressing transmission-line reflections |
| Ioff partial-power-down support | Enables safe insertion/removal in live backplanes and multi-rail systems without latch-up risk |
| Edge-rate control circuitry | Controls output slew rate to minimize simultaneous switching noise (SSN) and EMI emissions |
| TTL-input-compatible thresholds | Accepts standard TTL logic levels without level-shifting, simplifying interconnection with legacy systems |
| Function/pin compatibility with FCT family | Direct drop-in replacement for CY74FCT2244T-series parts across speed grades and packages |
Applications
| Memory Address Buffering | Backplane Bus Transceiver |
|---|---|
|
Use Scenario: Driving address lines from a microcontroller to multiple SRAM or Flash devices on a shared bus. IC Role / Device Role / Timing Role: Noninverting 3-state buffer providing isolation, fanout, and impedance-matched signal integrity. Use Value: Integrated 25-Ω resistors suppress reflections on long traces, maintaining setup/hold timing margins at >100 MHz. |
Use Scenario: Bidirectional data routing between CPU and peripheral modules across a 20-pin parallel backplane. IC Role / Device Role / Timing Role: Dual-channel line driver/receiver enabling time-multiplexed bus arbitration via OEA/OEB controls. Use Value: Independent enables allow precise control of direction and timing, eliminating bus contention during handshaking. |
| Clock Distribution | Legacy System Interface |
|
Use Scenario: Distributing a system clock to multiple synchronous peripherals (e.g., ADCs, DACs, FPGAs) with matched skew. IC Role / Device Role / Timing Role: Low-skew, low-jitter buffer replicating and driving clock signals with controlled edge rates. Use Value: Edge-rate control reduces harmonic content, lowering radiated emissions and improving jitter performance in mixed-signal systems. |
Use Scenario: Interfacing modern microcontrollers with legacy TTL-based instrumentation or industrial controllers. IC Role / Device Role / Timing Role: Logic-level translator and drive booster ensuring full voltage swing and noise margin compliance. Use Value: TTL-compatible VIH/VIL thresholds and 15-mA sourcing eliminate need for external pull-ups or level shifters. |
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 SOIC-20 package, identical pinout, but rated for 4.6 ns max tPD (FCT2244A speed grade) | Higher-speed requirement in timing-critical bus arbitration or clock distribution | Select when propagation delay ≤4.6 ns is required; otherwise CY74FCT2244TSOCTE4 offers better noise immunity at lower cost |
| 74ACT244SCX | ACT-family CMOS device: higher ICC (2–4 mA static), no on-chip 25-Ω resistors, 5.5 V absolute max VCC | Systems requiring wider supply tolerance or lower static power than FCT family allows | Choose only if 5.5-V operation or ACT logic family compatibility is mandatory; lacks integrated termination and Ioff |
Compared with SN74FCT2244NSR, CY74FCT2244TSOCTE4 trades 2.1 ns of speed for superior noise suppression via on-die termination and stronger Ioff protection. Against 74ACT244SCX, it delivers deterministic 25-Ω matching and guaranteed 5-V-only operation ideal for industrial backplanes.
Availability
CY74FCT2244TSOCTE4 is available at Aetrix Electronics and suitable for memory subsystems, industrial backplanes, clock distribution networks, and legacy TTL interface designs requiring stable component supply and long-term obsolescence management.
Supply support for CY74FCT2244TSOCTE4 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 logic solutions for industrial, automotive, and communications markets.
The CY74FCT2244TSOCTE4 belongs to TI's FCT logic family - engineered for high-speed, low-noise 5-V digital interfacing with integrated termination and robust power sequencing support.
FAQ
What is the maximum operating temperature range for CY74FCT2244TSOCTE4?
CY74FCT2244TSOCTE4 is specified for continuous operation from –40°C to +85°C ambient temperature. This industrial-grade range supports deployment in factory automation, motor drives, and outdoor communications equipment where thermal stability is critical. The SOIC-20 package has a θJA of 58°C/W, enabling reliable thermal performance under typical PCB copper pour conditions.
Does CY74FCT2244TSOCTE4 support hot-swap or partial-power-down operation?
Yes, CY74FCT2244TSOCTE4 includes Ioff circuitry that disables all outputs when VCC = 0 V, limiting off-state current to ±1 µA. This feature prevents damaging back-current flow when the device is powered down while other system components remain active - essential for hot-pluggable modules and multi-rail power architectures.
How does the 25-Ω on-chip resistor in CY74FCT2244TSOCTE4 improve signal integrity?
The 25-Ω series resistor integrated into each output of CY74FCT2244TSOCTE4 matches typical PCB trace impedances (50–75 Ω in parallel configurations), dampening signal reflections and standing waves. This eliminates discrete termination components, reduces layout complexity, and maintains clean edges on fast-switching buses - especially beneficial for memory address and clock lines longer than 2 inches.
Is CY74FCT2244TSOCTE4 pin-compatible with older 74F244 or 74LS244 devices?
No - CY74FCT2244TSOCTE4 is functionally and pin-compatible with other FCT-family octal buffers (e.g., CY74FCT2244T variants), not with bipolar 74F or 74LS logic. While pin count and SOIC-20 footprint match, electrical characteristics differ: CY74FCT2244TSOCTE4 uses CMOS input structure, has lower ICC, and includes Ioff and on-die termination absent in 74F/74LS parts.
What are the recommended decoupling practices for CY74FCT2244TSOCTE4?
Place a 0.1 µF ceramic capacitor between VCC (Pin 19) and GND (Pin 9) as close as possible to the SOIC-20 package. For systems with multiple CY74FCT2244TSOCTE4 devices or high-frequency switching, add a bulk 4.7 µF tantalum or aluminum electrolytic capacitor near the power entry point. Avoid shared vias between decoupling caps and ground planes to maintain low-inductance return paths.
CY74FCT2244TSOCTE4 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:
- 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
CY74FCT2244TSOCTE4 FAQ
1.How can I place an order for CY74FCT2244TSOCTE4 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY74FCT2244TSOCTE4 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 CY74FCT2244TSOCTE4 reliable?
The price and inventory of CY74FCT2244TSOCTE4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT2244TSOCTE4 is usually 5 days.
3.What payment methods are accepted for CY74FCT2244TSOCTE4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT2244TSOCTE4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY74FCT2244TSOCTE4?
CY74FCT2244TSOCTE4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY74FCT2244TSOCTE4 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 CY74FCT2244TSOCTE4?
For technical support, including CY74FCT2244TSOCTE4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT2244TSOCTE4 requirements.
6.How does Aetrix verify that CY74FCT2244TSOCTE4 is sourced from the original manufacturer or authorized distributors?
All CY74FCT2244TSOCTE4 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 CY74FCT2244TSOCTE4 meets industry standards.
7.What is the process for return or replacement of CY74FCT2244TSOCTE4?
All CY74FCT2244TSOCTE4 units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT2244TSOCTE4, 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 CY74FCT2244TSOCTE4 part is unused and in its original packaging.
Return procedure for CY74FCT2244TSOCTE4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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