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| Product attributes | Property Value |
| Manufacturer | onsemi |
| Product Series | 74HCT |
| Packaging | Bulk | |
| Part 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 | 6mA, 6mA |
| Voltage - Supply | 4.5V ~ 5.5V |
| Operating Temperature | -55°C ~ 125°C (TA) |
| Grade | - |
| Qualification | - |
| Mounting Type | Surface Mount |
| Package / Case | 20-TSSOP (0.173", 4.40mm Width) |
| Supplier Device Package | 20-TSSOP |
| ROHS |  |
The MC74HCT244ADT from onsemi is a dual non-inverting buffer in the 74HCT logic family. It features two channels with 3-State outputs, providing a fan-out of 6mA sink and source. Operating from a 4.5V to 5.5V supply, it is optimized for 5V TTL systems. The 20-TSSOP package is compact and suitable for space-constrained PCBs. Its wide temperature range of -55°C to 125°C makes it reliable for industrial and automotive applications. Typical uses include bus interfacing, memory buffering, and peripheral driving.
- TTL-Compatible Inputs: Ensures direct interface with 5V TTL logic without additional level shifting.
- 3-State Outputs: Allows multiple devices to share a bus, reducing wiring complexity.
- Compact TSSOP Package: Saves board space in high-density designs.
- Wide Temperature Range (-55°C to 125°C): Suitable for harsh environments.
5V Bus Interfacing
The MC74HCT244ADT is perfect for interfacing 5V microcontrollers to memory or peripheral devices. Its TTL-compatible inputs ensure reliable logic level detection in 5V systems.
Memory Address Buffering
In systems with multiple memory banks, this buffer can drive address lines without loading the microcontroller's output pins, maintaining signal integrity across the PCB.
Peripheral Driver
Use it to drive multiple peripheral devices such as LEDs or relays. The 6mA output current is sufficient for small loads, and the 3-State feature allows for power saving.
Level Shifting (5V to 5V with Isolation)
While not a level shifter, it provides isolation between the controller and the load, preventing back-voltage spikes from damaging the microcontroller.
Test Equipment
In automated test equipment, the 3-State outputs allow multiple test points to be multiplexed to a single measurement unit, reducing hardware complexity.
Industrial Control Modules
For industrial I/O modules, this buffer conditions signals from the backplane to the logic controller, ensuring clean, buffered signals in noisy environments.
- Q: What is the logic family of the MC74HCT244ADT?
- A: It belongs to the 74HCT (High-Speed CMOS with TTL-compatible inputs) logic family.
- Q: What is the function of this IC?
- A: It is a dual non-inverting buffer with 3-State outputs.
- Q: How many channels does it have?
- A: It has 2 channels.
- Q: What is the output type?
- A: The outputs are 3-State, enabling connection to shared buses.
- Q: What is the operating voltage range?
- A: It operates from 4.5V to 5.5V, making it ideal for 5V systems.
- Q: What is the package type?
- A: It comes in a 20-TSSOP (Thin Shrink Small Outline Package) with a 4.40mm width.
MC74HCT244ADT.pdf
- Q: What is the logic family of the MC74HCT244ADT?
- A: It belongs to the 74HCT (High-Speed CMOS with TTL-compatible inputs) logic family.
- Q: What is the function of this IC?
- A: It is a dual non-inverting buffer with 3-State outputs.
- Q: How many channels does it have?
- A: It has 2 channels.
- Q: What is the output type?
- A: The outputs are 3-State, enabling connection to shared buses.
- Q: What is the operating voltage range?
- A: It operates from 4.5V to 5.5V, making it ideal for 5V systems.
- Q: What is the package type?
- A: It comes in a 20-TSSOP (Thin Shrink Small Outline Package) with a 4.40mm width.