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Texas Instruments CY74FCT2244ATSOC
- Part No.:
- CY74FCT2244ATSOC
- Manufacturer:
- Texas Instruments
- Package:
- 20-SOIC (0.295", 7.50mm Width)
- Datasheet:
-
CY74FCT2244ATSOC.pdf
- Description:
- IC BUF NON-INVERT 5.25V 20SOIC
- Quantity:
- Payment:
- Shipping:
Inventory:831
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Product details
Overview
CY74FCT2244ATSOC from Texas Instruments is an octal noninverting 3-state buffer/line driver with on-chip 25-Ω series output resistors, 4.6 ns max propagation delay (tPLH/tPHL), ±15 mA output drive capability, and Ioff support for partial-power-down operation. It serves as a memory address driver, clock driver, or bus-oriented transmitter/receiver in TTL- and CMOS-compatible digital systems.
For engineers reviewing the CY74FCT2244ATSOC datasheet, CY74FCT2244ATSOC pinout, CY74FCT2244ATSOC application, or CY74FCT2244ATSOC equivalent, key selection criteria include its 25-Ω integrated termination, dual 3-state enable inputs (OEA/OEB), TTL-compatible input thresholds, and SOIC-20 package with 58°C/W thermal resistance.
Technical Context
This device implements two independent 4-bit buffered channels (A-side: OA0–OA3; B-side: OB0–OB3), each controlled by separate 3-state enables (OEA and OEB). Its edge-rate control circuitry limits slew rate to suppress transmission-line reflections without external components.
The integrated 25-Ω output series resistors are matched across all eight outputs and operate transparently during both high- and low-level driving. Ioff functionality ensures <±1 µA leakage when VCC = 0 V and outputs are biased to 4.5 V, enabling safe back-drive protection in powered-down subsystems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Propagation Delay | Max 4.6 ns (tPLH/tPHL at VCC = 4.75 V, CL = 50 pF) - enables high-speed bus buffering up to ~217 MHz data rate. |
| Output Drive | ±15 mA (IOH/IOL) - supports direct interface to TTL, NMOS, and CMOS loads without external pull-ups/downs. |
| Output Termination | 25 Ω (ROUT typ) - eliminates need for discrete series resistors, reducing PCB area and component count. |
| Ioff Leakage | ±1 µA at VCC = 0 V, VOUT = 4.5 V - prevents damaging current flow during hot-insertion or partial power-down. |
| Input Thresholds | VIH = 2.0 V min, VIL = 0.8 V max - fully compatible with standard TTL logic levels for seamless system integration. |
| ESD Protection | 2000-V HBM, 200-V MM, 1000-V CDM - exceeds JEDEC JESD22 standards for robust handling in manufacturing and field use. |
| Supply Range | VCC = 4.75–5.25 V - tightly regulated 5-V operation ensures stable timing margins in noise-sensitive applications. |
Pinout & Package
Package: SOIC-20 (DW), body width 7.5 mm, height ≤2.65 mm, thermal resistance θJA = 58°C/W. RoHS-compliant, green finish, moisture sensitivity level (MSL) Level-1 (unlimited floor life).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1, 2, 3, 4 (DA0–DA3) | Data Inputs – Channel A | Noninverting inputs for first 4-bit buffer group; accept TTL/CMOS logic levels directly. |
| 5, 6, 7, 8 (DB0–DB3) | Data Inputs – Channel B | Noninverting inputs for second 4-bit buffer group; electrically isolated from Channel A. |
| 9 (GND) | Ground Reference | Primary signal return path; must be low-impedance connection to minimize ground bounce. |
| 10 (OEB) | Output Enable – Channel B | Active-low control: drives OB0–OB3 into high-impedance state when high. |
| 11–14 (OA0–OA3) | Outputs – Channel A | 3-state noninverting outputs with integrated 25-Ω series termination; drive bidirectional buses. |
| 15–18 (OB0–OB3) | Outputs – Channel B | 3-state noninverting outputs with identical 25-Ω termination; independent of OA outputs. |
| 19 (OEA) | Output Enable – Channel A | Active-low control: drives OA0–OA3 into high-impedance state when high. |
| 20 (VCC) | Power Supply | +5 V supply pin; requires local 0.1 µF ceramic decoupling adjacent to pin. |
Key Features
| Feature | Design Value |
|---|---|
| On-chip 25-Ω output series resistors | Eliminates external termination components, reduces board space, and improves signal integrity on stubbed or unterminated lines. |
| Dual independent 3-state enables (OEA/OEB) | Enables selective channel isolation - e.g., hold A-side active while tri-stating B-side during bus arbitration. |
| Ioff partial-power-down support | Prevents reverse current flow when VCC is off but I/O pins remain biased, critical for hot-swap and mixed-voltage systems. |
| Edge-rate control circuitry | Reduces fast-edge-induced crosstalk and ground bounce without sacrificing propagation speed. |
| TTL-output-level compatibility | VOH ≥2.4 V at –15 mA and VOL ≤0.55 V at 12 mA ensure reliable interfacing with legacy TTL loads. |
Applications
| Memory Address Buffering | System Clock Distribution |
|---|---|
|
Use Scenario: Driving multiplexed address lines from a microcontroller to multiple SRAM or Flash devices on a shared bus. IC Role / Device Role / Timing Role: Noninverting buffer with 3-state control isolates address drivers during memory access arbitration. Use Value: Integrated 25-Ω resistors suppress reflections on long trace runs, maintaining setup/hold timing margins across temperature. |
Use Scenario: Distributing a single system clock to multiple synchronous peripherals (e.g., ADC, DAC, FPGA config logic). IC Role / Device Role / Timing Role: Low-skew line driver with matched propagation delay across all eight outputs. Use Value: 4.6 ns max tPLH/tPHL and tight delay matching (<0.5 ns variation) minimize clock skew between destinations. |
| Backplane Bus Transceiver Interface | Industrial Control I/O Expansion |
|
Use Scenario: Interfacing a local controller to a multi-drop RS-485 or CAN physical layer transceiver via parallel control/data lines. IC Role / Device Role / Timing Role: Bidirectional bus driver with independent channel enables for half-duplex protocol handshaking. Use Value: Dual OEA/OEB allows simultaneous enable of transmit path while disabling receive path, preventing bus contention. |
Use Scenario: Expanding GPIO count on a PLC CPU module to drive relays, indicators, or sensor interfaces. IC Role / Device Role / Timing Role: Robust 15-mA sink/source buffer tolerant of industrial voltage transients and ESD events. Use Value: 2000-V HBM ESD rating and Ioff protection ensure reliability in noisy factory environments with frequent cable hot-plug cycles. |
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 |
|---|---|---|---|
| SN74FCT2244ATSOCT | Identical electrical specs and pinout; same SOIC-20 package but supplied in tape-and-reel (2500 pcs) vs. tube (25 pcs). | No functional difference; suited for automated SMT assembly rather than manual prototyping or low-volume qualification. | Select SN74FCT2244ATSOCT for high-volume production requiring pick-and-place compatibility. |
| CY74FCT2244TSOC | Slower speed grade: 6.5 ns max propagation delay vs. 4.6 ns; otherwise identical pinout, package, and features. | Lower maximum operating frequency; acceptable where timing margin >2.5 ns is available or lower power consumption is prioritized. | Choose CY74FCT2244TSOC only if system timing budget permits longer delays and cost-per-unit is primary concern. |
Compared with CY74FCT2244ATSOC, SN74FCT2244ATSOCT offers identical performance in a production-optimized packaging format, while CY74FCT2244TSOC trades 1.9 ns of speed for reduced dynamic power - making the ATSOC variant optimal for timing-critical 5-V bus interfaces requiring minimal skew and reflection control.
Availability
CY74FCT2244ATSOC is available at Aetrix Electronics and suitable for memory address buffering, clock distribution, backplane bus interfacing, and industrial I/O expansion requiring stable component supply, full RoHS compliance, and MSL Level-1 handling.
Supply support for CY74FCT2244ATSOC 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 company headquartered in Dallas, Texas, delivering analog and embedded processing solutions across industrial, automotive, and communications markets since 1930.
CY74FCT2244ATSOC belongs to TI's FCT logic family - designed specifically for high-speed, low-noise 5-V TTL-compatible digital interfacing with integrated termination and power-down safety.
FAQ
What is the maximum propagation delay for CY74FCT2244ATSOC under recommended operating conditions?
The CY74FCT2244ATSOC has a maximum propagation delay (tPLH and tPHL) of 4.6 ns when measured at VCC = 4.75 V, CL = 50 pF, and TA = –40°C to 85°C. This value is specified for the faster "A" speed grade and reflects worst-case delay across all eight channels of the CY74FCT2244ATSOC device.
Does CY74FCT2244ATSOC support partial-power-down operation, and how is it implemented?
Yes, CY74FCT2244ATSOC supports partial-power-down via its Ioff feature. When VCC = 0 V, the device limits output leakage to ±1 µA even if I/O pins are driven to 4.5 V - preventing damaging back-current flow. This behavior is intrinsic to the CY74FCT2244ATSOC silicon design and requires no external circuitry.
What is the purpose of the 25-Ω output series resistors in CY74FCT2244ATSOC?
The 25-Ω output series resistors in CY74FCT2244ATSOC are integrated on-die to dampen transmission-line reflections on PCB traces, especially in high-speed or unterminated bus configurations. They reduce electromagnetic interference and improve signal integrity without requiring discrete resistors - a key design advantage of the CY74FCT2244ATSOC over generic buffers.
Can CY74FCT2244ATSOC interface directly with TTL and CMOS logic families?
Yes, CY74FCT2244ATSOC is fully compatible with TTL and CMOS inputs and outputs. Its VIH (2.0 V min) and VIL (0.8 V max) match TTL thresholds, and VOH (≥2.4 V) and VOL (≤0.55 V) meet TTL output specs - enabling direct connection to 74LS, 74HC, and other 5-V logic families without level-shifting components.
What package type and footprint does CY74FCT2244ATSOC use, and is it RoHS compliant?
CY74FCT2244ATSOC uses a SOIC-20 package (TI drawing DW), 7.5 mm wide, with 1.27 mm lead pitch and maximum height of 2.65 mm. It is RoHS-compliant and green (low-halogen), with NIPDAU lead finish and JEDEC MS-013 registration - confirmed in TI's official packaging addendum for CY74FCT2244ATSOC.
CY74FCT2244ATSOC Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- 74FCT
- Package/Case:
- 20-SOIC (0.295", 7.50mm Width)
- Packaging:
- Tube
- 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
CY74FCT2244ATSOC FAQ
1.How can I place an order for CY74FCT2244ATSOC through Aetrix?
Please submit a Request for Quotation (RFQ) for CY74FCT2244ATSOC 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 CY74FCT2244ATSOC reliable?
The price and inventory of CY74FCT2244ATSOC are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for CY74FCT2244ATSOC is usually 5 days.
3.What payment methods are accepted for CY74FCT2244ATSOC?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for CY74FCT2244ATSOC transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for CY74FCT2244ATSOC?
CY74FCT2244ATSOC orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your CY74FCT2244ATSOC 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 CY74FCT2244ATSOC?
For technical support, including CY74FCT2244ATSOC datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your CY74FCT2244ATSOC requirements.
6.How does Aetrix verify that CY74FCT2244ATSOC is sourced from the original manufacturer or authorized distributors?
All CY74FCT2244ATSOC 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 CY74FCT2244ATSOC meets industry standards.
7.What is the process for return or replacement of CY74FCT2244ATSOC?
All CY74FCT2244ATSOC units undergo pre-shipment inspection (PSI). If there is an issue with CY74FCT2244ATSOC, 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 CY74FCT2244ATSOC part is unused and in its original packaging.
Return procedure for CY74FCT2244ATSOC:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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