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Texas Instruments CY74FCT244TQCTG4
- Part No.:
- CY74FCT244TQCTG4
- Manufacturer:
- Texas Instruments
- Package:
- 20-SSOP (0.154", 3.90mm Width)
- Datasheet:
-
CY74FCT244TQCTG4.pdf
- Description:
- IC BUFF/DVR TRI-ST 8BIT 20QSOP
- Quantity:
- Payment:
- Shipping:
Inventory:2,500
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Product details
Overview
CY74FCT244TQCTG4 from Texas Instruments is an octal 3-state buffer/line driver IC used for memory address driving, clock distribution, and bus transceiver applications in TTL- and CMOS-compatible systems. It delivers 64-mA sink / 32-mA source drive strength, 3.6-ns typical propagation delay (tPLH/tPHL), and operates at 4.75–5.25 V with Ioff partial-power-down support.
For engineers reviewing the CY74FCT244TQCTG4 datasheet, CY74FCT244TQCTG4 pinout, CY74FCT244TQCTG4 application, or CY74FCT244TQCTG4 equivalent, key selection criteria include 3-state output control timing (tPZH/tPHZ ≤ 4.0 ns), edge-rate controlled noise immunity, matched rise/fall times, and compatibility with legacy 5-V logic families without level-shifting components.
Technical Context
This device implements dual independent 4-bit noninverting buffers, each controlled by a dedicated 3-state enable (OEA/OEB). Its FCT-family architecture uses bipolar-CMOS (BiCMOS) process technology to achieve TTL-speed performance with CMOS power efficiency.
The Ioff circuitry actively disables outputs when VCC = 0 V, preventing backflow current during partial power-down. Edge-rate control circuitry limits dV/dt on outputs to reduce simultaneous switching noise (SSN), while input thresholds (VIH = 2.0 V, VIL = 0.8 V) ensure robust TTL-level interfacing.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 4.75–5.25 V - Ensures stable operation across industrial-grade 5-V rails with ±5% tolerance. |
| Output Drive | 64 mA sink / 32 mA source - Supports heavy capacitive loads (e.g., >100 pF buses) and fan-out to ≥10 standard TTL inputs. |
| Propagation Delay | 3.6 ns max (tPLH/tPHL) - Enables reliable operation in high-speed address/data paths up to ~250 MHz clock domains. |
| 3-State Enable Timing | tPZH/tPHZ ≤ 4.0 ns - Guarantees fast bus release for time-critical shared-bus arbitration. |
| Ioff Current | ±1 µA at VCC = 0 V - Prevents damaging backfeed current when powered down in mixed-supply systems. |
| ESD Rating | 2000-V HBM - Meets JEDEC JESD22-A114A for handling robustness in manufacturing and field environments. |
| Input Thresholds | VIH = 2.0 V, VIL = 0.8 V - Directly interfaces with TTL, NMOS, and CMOS logic without external biasing or level translation. |
Pinout & Package
CY74FCT244TQCTG4 is packaged in a 20-pin SSOP (DBQ) with 0.65-mm pitch, 5.3-mm body width, and 7.2-mm length per TI DWG DBQ-0020A. Thermal resistance θJA = 68°C/W enables operation up to +85°C ambient without forced airflow.
| 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 12–19) outputs. |
| 2–5, 12–15 | DA0–DA3 / DB0–DB3 | Data inputs - Accept TTL/CMOS logic levels; internally buffered to drive corresponding outputs. |
| 3–6, 13–16 | OA0–OA3 / OB0–OB3 | Noninverting 3-state outputs - High-drive, edge-rate-controlled signals for bus transmission or clock fanout. |
| 10 | GND | 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 10 mm of pin for noise suppression. |
Key Features
| Feature | Design Value |
|---|---|
| Edge-rate controlled outputs | Reduces simultaneous switching noise (SSN) by limiting dV/dt, enabling cleaner signal integrity on dense PCBs. |
| Ioff partial-power-down protection | Prevents reverse current flow when VCC is off, supporting hot-swap and multi-rail power sequencing. |
| Matched rise/fall times | Ensures symmetrical waveform edges (<10% skew), minimizing duty-cycle distortion in clock distribution paths. |
| TTL/CMOS/NMOS interoperability | Eliminates need for external level shifters or pull-up resistors in mixed-logic designs. |
| High ESD immunity (2000-V HBM) | Reduces risk of field failure during handling, assembly, or end-user operation in uncontrolled environments. |
Applications
| Memory Address Buffering | Industrial Bus Transceiver |
|---|---|
Use Scenario: Driving 16-bit address lines from a microcontroller to multiple SRAM or Flash devices on a shared memory bus. IC Role / Device Role / Timing Role: Noninverting 3-state buffer isolating MCU address outputs and enabling multi-drop addressing with bus contention avoidance. Use Value: 64-mA sink capability ensures full logic swing under 50-pF load per line; tPZH ≤ 4.0 ns guarantees rapid bus release before next cycle. | Use Scenario: Bidirectional data transfer between a PLC CPU and field I/O modules over a parallel control bus. IC Role / Device Role / Timing Role: Dual-group 3-state line driver/receiver managing direction-controlled data lanes with independent OEA/OEB enables. Use Value: Matched rise/fall times prevent data skew across 8-bit lanes; Ioff protects modules during hot-plug insertion. |
| Clock Distribution Network | Legacy System Interface Adapter |
Use Scenario: Fanout of a 25-MHz system clock to multiple peripherals (ADC, DAC, FPGA config logic) with minimal jitter. IC Role / Device Role / Timing Role: Low-skew, edge-rate-controlled buffer delivering clean clock edges with deterministic propagation delay (3.6 ns). Use Value: Propagation delay variation <0.5 ns across temperature ensures tight timing margin; VOH = 3.3 V (typ) meets TTL VIH requirements. | Use Scenario: Interfacing a modern ARM-based controller with legacy 5-V parallel peripherals (printers, displays, sensors). IC Role / Device Role / Timing Role: Level-tolerant buffer translating between 3.3-V MCU I/O and 5-V peripheral buses without external components. Use Value: VIH = 2.0 V accepts 3.3-V logic highs directly; VOL = 0.55 V guarantees solid TTL logic lows even at 64-mA load. |
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 |
|---|---|---|---|
| SN74FCT244ATPWR | Same FCT family, identical pinout and electrical specs; differs only in tape-and-reel packaging (2000 pcs vs. 2500 pcs) and RoHS marking. | No functional difference; suitable for identical use cases including memory buffering and bus driving. | Select when volume procurement requires TI's standard 2-k reel configuration or specific logistics labeling. |
| 74ACT244SCX | Advanced CMOS (ACT) variant: higher speed (tPLH = 3.0 ns), lower ICC (0.06 mA), but no Ioff support and reduced ESD rating (1500-V HBM). | Lacks partial-power-down capability; not recommended for hot-swap or multi-rail systems requiring Ioff. | Choose only for cost-sensitive, single-supply designs where Ioff and 2000-V HBM are not required. |
Compared with SN74FCT244ATPWR and 74ACT244SCX, CY74FCT244TQCTG4 provides guaranteed Ioff protection and superior ESD robustness-critical for industrial control and embedded systems with variable power sequencing.
Availability
CY74FCT244TQCTG4 is available at Aetrix Electronics and suitable for memory address buffering, industrial bus transceivers, clock distribution networks, and legacy system interface adapters requiring stable component supply across extended temperature ranges.
Supply support for CY74FCT244TQCTG4 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 for industrial, automotive, and communications markets.
CY74FCT244TQCTG4 belongs to the FCT (Fast CMOS Technology) logic family, engineered for high-speed, low-noise 5-V digital interfacing in mission-critical industrial and computing infrastructure.
FAQ
What is the maximum operating temperature range for CY74FCT244TQCTG4?
CY74FCT244TQCTG4 is rated for –40°C to +85°C ambient operation, validated per TI's industrial-grade qualification standards. This range supports deployment in factory automation controllers, motor drives, and outdoor communication equipment where thermal cycling and sustained high-temperature operation occur.
Does CY74FCT244TQCTG4 support partial-power-down mode?
Yes, CY74FCT244TQCTG4 includes Ioff circuitry that disables outputs and limits leakage to ±1 µA when VCC = 0 V. This feature prevents backflow current in mixed-voltage systems-such as those with independently powered FPGA I/O banks and microcontroller cores-ensuring safe power sequencing and hot-swap capability.
What package type and dimensions does CY74FCT244TQCTG4 use?
CY74FCT244TQCTG4 uses a 20-pin SSOP (Shrink Small Outline Package) with drawing code DBQ, measuring 7.2 mm × 5.3 mm × 1.95 mm (max height). Pin pitch is 0.65 mm, and it complies with JEDEC MS-013, enabling drop-in replacement for other DBQ-20 logic devices in space-constrained layouts.
How does CY74FCT244TQCTG4 differ from the CY74FCT244ATQCT variant?
CY74FCT244TQCTG4 is the standard-speed version (3.6-ns max tPLH), while CY74FCT244ATQCT is the advanced-speed variant (4.0-ns max tPLH). Both share identical pinout, package, Ioff, and voltage specs-but CY74FCT244ATQCT offers tighter timing margins for ultra-high-speed bus designs requiring sub-4-ns propagation.
Can CY74FCT244TQCTG4 interface directly with 3.3-V microcontrollers?
Yes, CY74FCT244TQCTG4 accepts 3.3-V logic-high inputs (VIH = 2.0 V min) and outputs 3.3-V compatible VOH (3.3 V typ at IOH = –32 mA), making it suitable for direct connection to 3.3-V MCUs driving 5-V peripherals-no level shifter needed. Input hysteresis (Vhys = 0.2 V) further improves noise immunity on noisy control lines.
CY74FCT244TQCTG4 Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74FCT
- Package/Case:
- 20-SSOP (0.154", 3.90mm 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:
- -
- 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-SSOP/QSOP
CY74FCT244TQCTG4 FAQ
1.How can I place an order for CY74FCT244TQCTG4 through Aetrix?
Please submit a Request for Quotation (RFQ) for CY74FCT244TQCTG4 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 CY74FCT244TQCTG4 reliable?
The price and inventory of CY74FCT244TQCTG4 are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT244TQCTG4 is usually 5 days.
3.What payment methods are accepted for CY74FCT244TQCTG4?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT244TQCTG4 transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY74FCT244TQCTG4?
CY74FCT244TQCTG4 orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY74FCT244TQCTG4 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 CY74FCT244TQCTG4?
For technical support, including CY74FCT244TQCTG4 datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT244TQCTG4 requirements.
6.How does Aetrix verify that CY74FCT244TQCTG4 is sourced from the original manufacturer or authorized distributors?
All CY74FCT244TQCTG4 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 CY74FCT244TQCTG4 meets industry standards.
7.What is the process for return or replacement of CY74FCT244TQCTG4?
All CY74FCT244TQCTG4 units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT244TQCTG4, 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 CY74FCT244TQCTG4 part is unused and in its original packaging.
Return procedure for CY74FCT244TQCTG4:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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