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| Product attributes | Property Value |
| Manufacturer | IDT, Integrated Device Technology Inc |
| Product Series | |
| Packaging | Bulk | |
| Part Status | Active |
| Logic Type | Buffer, Inverting |
| Number of Elements | 2 |
| Number of Bits per Element | 4 |
| Input Type | - |
| Output Type | 3-State |
| Current - Output High, Low | 15mA, 64mA |
| Voltage - Supply | 4.75V ~ 5.25V |
| Operating Temperature | 0°C ~ 70°C (TA) |
| Grade | - |
| Qualification | - |
| Mounting Type | Surface Mount |
| Package / Case | 20-SSOP (0.154", 3.90mm Width) |
| Supplier Device Package | 20-SSOP (0.154", 3.90mm Width) |
The IDT74FCT240TQ is a high-speed inverting buffer from IDT, designed for 5V logic systems. It features 2 channels with 3-State outputs, enabling efficient bus interfacing and signal buffering. With a supply voltage range of 4.75V to 5.25V, it is compatible with standard TTL logic levels. The device can source 15mA and sink 64mA, providing robust drive capability for capacitive loads and long transmission lines. Housed in a compact 20-SSOP package, it is ideal for space-constrained applications in computing, telecommunications, and industrial control systems.
- High Sink Current (64mA): Drives heavy capacitive loads and long bus lines without signal degradation.
- 3-State Outputs: Enables bus sharing and prevents data contention in multi-device systems.
- Wide 5V Supply Range (4.75V-5.25V): Compatible with legacy 5V logic and TTL interfaces.
- Inverting Function: Provides signal inversion without additional logic gates, saving board space.
- Compact SSOP Package: Suitable for high-density PCB layouts.
High-Speed Bus Interfacing
Use the IDT74FCT240TQ to buffer address and data lines in microprocessor systems. The 3-State outputs allow multiple devices to share the bus without contention, while the high sink current (64mA) ensures signal integrity over long traces.
Signal Inversion in Control Logic
Implement active-low control signals with the inverting buffer function. This is ideal for enabling/disabling memory chips or peripheral devices where an inverted enable signal is required.
Memory Address Buffering
Buffer address lines from a CPU to multiple DRAM or SRAM banks. The FCT family's fast propagation delay minimizes access time penalties, and the 3-State outputs prevent bus conflicts during refresh cycles.
Industrial Control Outputs
Drive industrial control signals such as relay drivers or PLC I/O modules. The 64mA sink capability can directly drive optocouplers or small relays with proper current limiting resistors.
Backplane Driver for Telecom Equipment
Drive signals across backplanes in telecom switches. The 3-State outputs allow hot-swapping of line cards, and the 5V operation matches legacy telecom logic levels.
Test Equipment Signal Conditioning
Use as a buffer/inverter in test fixtures to condition signals from DUTs. The 3-State feature enables multiplexing multiple test points to a single measurement channel.
- Q: What is the logic family of the IDT74FCT240TQ?
- A: This device belongs to the FCT logic family, designed for high-speed 5V systems.
- Q: What is the function of this IC?
- A: It is an inverting buffer with 2 channels, providing signal inversion and buffering.
- Q: What is the output type?
- A: The outputs are 3-State, allowing connection to shared buses with high-impedance control.
- Q: What is the operating voltage range?
- A: It operates at 4.75V to 5.25V, making it suitable for standard 5V logic applications.
- Q: What is the package type?
- A: It comes in a 20-SSOP package with a 3.90mm width.
- Q: What are the output current capabilities?
- A: It can source 15mA and sink 64mA, providing strong drive for bus lines.
IDT74FCT240TQ.pdf
- Q: What is the logic family of the IDT74FCT240TQ?
- A: This device belongs to the FCT logic family, designed for high-speed 5V systems.
- Q: What is the function of this IC?
- A: It is an inverting buffer with 2 channels, providing signal inversion and buffering.
- Q: What is the output type?
- A: The outputs are 3-State, allowing connection to shared buses with high-impedance control.
- Q: What is the operating voltage range?
- A: It operates at 4.75V to 5.25V, making it suitable for standard 5V logic applications.
- Q: What is the package type?
- A: It comes in a 20-SSOP package with a 3.90mm width.
- Q: What are the output current capabilities?
- A: It can source 15mA and sink 64mA, providing strong drive for bus lines.