CY74FCT244ATQCTG4 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The CY74FCT244ATQCTG4 is an octal unidirectional buffer and line driver with 3-state outputs, active-low output enable, and 64 mA output sink current in a 20-pin SSOP package. It belongs to the FCT logic family and drives 50 pF load capacitance at high speed. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 20
- Lifecycle
- OBSOLETE
- Datasheet
- CY74FCT244ATQCTG4 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- -40.0°C to 85.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
What are the key features of CY74FCT244ATQCTG4?
- Octal 8-channel unidirectional buffer with 64 mA maximum output low current for robust bus driving capability
- Active-low enable control and 3-state outputs allow seamless shared-bus integration without signal contention
- FCT logic family with 50 pF load capacitance rating in a compact 20-pin SSOP for high-density designs
What is CY74FCT244ATQCTG4 used for?
The CY74FCT244ATQCTG4 is used to buffer and drive 8-bit data or address buses in microprocessor systems, memory interfaces, and FPGA I/O expansion boards where signal integrity and drive strength are critical. Its 64 mA output sink current enables it to drive long PCB traces and multiple parallel loads without significant voltage droop. The 20-pin SSOP package suits high-density digital boards in industrial controllers, communications equipment, and embedded computing platforms.
What are the specifications of CY74FCT244ATQCTG4?
| YTEOL | 0 |
| Control Type | ENABLE LOW |
| Count Direction | UNIDIRECTIONAL |
| Family | FCT |
| JESD-30 Code | R-PDSO-G20 |
| JESD-609 Code | e4 |
| Load Capacitance (CL) | 50pF |
| Logic IC Type | BUS DRIVER |
| Max I(ol) | 0.064A |
| Number of Bits | 4 |
| Number of Functions | 2 |
| Number of Ports | 2 |
| Output Characteristics | 3-STATE |
| Output Polarity | TRUE |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SSOP20,.25 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE, SHRINK PITCH |
| Packing Method | TR |
| Peak Reflow Temperature (Cel) | 260 |
| Power Supply Current-Max (ICC) | 0.2mA |
| Prop. Delay@Nom-Sup | 4.6ns |
| Propagation Delay (tpd) | 4.6ns |
| Qualification Status | Not Qualified |
| Supply Voltage-Max (Vsup) | 5.25V |
| Supply Voltage-Min (Vsup) | 4.75V |
| Supply Voltage-Nom (Vsup) | 5V |
| Surface Mount | YES |
| Technology | CMOS |
| Temperature Grade | INDUSTRIAL |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 0.635mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 2 |
| HTS Code | 8542.39.00.60 |
Where can I find the CY74FCT244ATQCTG4 datasheet?
CY74FCT244ATQCTG4 Datasheet DownloadOfficial datasheet from Texas Instruments
What are equivalent replacements for CY74FCT244ATQCTG4?
No known alternates. Submit an RFQ and our team can suggest alternatives.
Frequently Asked Questions
How does the 64 mA output sink current of CY74FCT244ATQCTG4 benefit long-trace bus driving applications?
The CY74FCT244ATQCTG4 provides a maximum output low current of 64 mA per channel, significantly stronger than standard CMOS logic outputs typically rated at 8 mA to 24 mA. This high drive strength allows the device to maintain valid logic low levels when driving heavily loaded backplane buses with many parallel receiver inputs, long PCB traces with parasitic capacitance up to 50 pF, or series termination resistors.
In which system configurations does the active-low output enable of CY74FCT244ATQCTG4 simplify bus arbitration?
The active-low OE (output enable) input of CY74FCT244ATQCTG4 connects naturally to chip-select or bus-grant signals that are conventionally active-low in 5 V microprocessor bus architectures. This polarity compatibility eliminates inverter stages in address-decoded enable paths, reducing latency and component count in memory and peripheral bus designs where the controller asserts select lines low to activate specific devices.
When would an engineer choose CY74FCT244ATQCTG4 over a bidirectional transceiver such as 74FCT245 for a bus interface?
CY74FCT244ATQCTG4 is chosen over a bidirectional transceiver when data flow is strictly one-directional, such as driving address lines from a CPU to memory, or buffering output-only status registers to a data bus. Using a unidirectional buffer avoids back-driving hazards that arise if a bidirectional device's direction control is incorrectly configured, improving system robustness in deterministic-direction signal paths.
What load capacitance and package does CY74FCT244ATQCTG4 support and how does this affect PCB assembly?
The CY74FCT244ATQCTG4 drives 50 pF load capacitance per output in a 20-pin SSOP with 0.635 mm pin pitch. The fine-pitch SSOP footprint requires SMT assembly with solder paste printing and reflow processes, but allows tighter component spacing than DIP packages, saving approximately 60% board area compared to an equivalent 20-pin DIP device in designs where layout density matters.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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