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| Product attributes | Property Value |
| Manufacturer | Fairchild Semiconductor |
| 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 | 7.2mA, 7.2mA |
| Voltage - Supply | 4.5V ~ 5.5V |
| Operating Temperature | -40°C ~ 85°C (TA) |
| Grade | - |
| Qualification | - |
| Mounting Type | Surface Mount |
| Package / Case | 20-SOIC (0.209", 5.30mm Width) |
| Supplier Device Package | 20-SOP |
| ROHS |  |
The MM74HCT244SJX is a non-inverting buffer from Fairchild Semiconductor, part of the 74HCT logic family. It features two channels with 3-State outputs, capable of sourcing or sinking 7.2mA. Operating from a 4.5V to 5.5V supply, it is designed for 5V systems requiring signal buffering and isolation. The TTL-compatible inputs allow interfacing with 3.3V logic. This buffer is commonly used in microcontroller output buffering, memory address driving, and LED multiplexing. Its 20-SOIC package is ideal for compact PCB designs.
- TTL-Compatible Inputs: Allows direct interfacing with 3.3V logic, simplifying mixed-voltage designs.
- 3-State Outputs: Provides bus isolation and multiplexing capability, enhancing system flexibility.
- High Noise Immunity: CMOS technology ensures reliable operation in electrically noisy environments.
- Wide Temperature Range (-40°C to 85°C): Suitable for industrial and automotive applications.
Microcontroller Output Buffering
The MM74HCT244 can buffer the output pins of a microcontroller, providing additional drive strength and protecting the MCU from external loads. The 3-State feature allows the MCU to release the bus when needed.
Memory Address Line Driving
In systems with multiple memory chips, this buffer can drive address lines to multiple devices, ensuring signal integrity and reducing loading on the memory controller.
LED Display Multiplexing
With 7.2mA output current, it can drive segments of an LED display in a multiplexed configuration, with the 3-State outputs allowing for efficient scanning.
Level Shifting for 5V Systems
The TTL-compatible inputs allow it to accept 3.3V logic signals and output 5V logic levels, making it useful for interfacing low-voltage logic to 5V peripherals.
Industrial Control Signal Conditioning
In industrial environments, the buffer can condition and isolate control signals from sensors and switches, providing a clean interface to a PLC or control system.
Test Equipment and Instrumentation
The buffer can be used to isolate and drive signals in test setups, ensuring accurate signal transmission without loading the device under test.
- Q: What is the logic family of the MM74HCT244SJX?
- A: It belongs to the 74HCT family, which is a high-speed CMOS logic family with TTL-compatible inputs.
- Q: What is the function of this IC?
- A: It is a non-inverting buffer with 2 channels, used to strengthen and isolate digital signals.
- Q: What is the output type?
- A: It has 3-State outputs, allowing the outputs to be disabled for bus-oriented applications.
- Q: What is the operating voltage range?
- A: It operates from 4.5V to 5.5V, making it suitable for standard 5V logic systems.
- Q: What is the output current capability?
- A: It can source or sink 7.2mA per output, suitable for driving logic inputs and small loads.
- Q: What package is available?
- A: It is available in a 20-SOIC (0.209", 5.30mm Width) package for surface-mount assembly.
MM74HCT244SJX.pdf
- Q: What is the logic family of the MM74HCT244SJX?
- A: It belongs to the 74HCT family, which is a high-speed CMOS logic family with TTL-compatible inputs.
- Q: What is the function of this IC?
- A: It is a non-inverting buffer with 2 channels, used to strengthen and isolate digital signals.
- Q: What is the output type?
- A: It has 3-State outputs, allowing the outputs to be disabled for bus-oriented applications.
- Q: What is the operating voltage range?
- A: It operates from 4.5V to 5.5V, making it suitable for standard 5V logic systems.
- Q: What is the output current capability?
- A: It can source or sink 7.2mA per output, suitable for driving logic inputs and small loads.
- Q: What package is available?
- A: It is available in a 20-SOIC (0.209", 5.30mm Width) package for surface-mount assembly.