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M74HCT244 from ST,ST Microelectronics

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M74HCT244

Manufacturer: ST, STMicroelectronics

HCT240: INVERTED

Partnumber Manufacturer Quantity Availability
M74HCT244 ST, STMicroelectronics 920 In Stock

Description and Introduction

HCT240: INVERTED The M74HCT244 is an octal buffer/line driver with 3-state outputs, manufactured by STMicroelectronics. It is part of the HCT family, which combines high-speed CMOS technology with TTL compatibility.  

### **Key Specifications:**  
- **Supply Voltage (VCC):** 4.5V to 5.5V  
- **Input Voltage (VI):** 0V to VCC  
- **High-Level Input Voltage (VIH):** 2V (min)  
- **Low-Level Input Voltage (VIL):** 0.8V (max)  
- **Output Current (IO):** ±6mA  
- **Propagation Delay (tpd):** 13ns (typical at VCC = 5V, CL = 50pF)  
- **Operating Temperature Range:** -40°C to +125°C  
- **Package Options:** DIP-20, SO-20  

### **Features:**  
- **Octal Buffer/Line Driver:** 8 non-inverting buffers with 3-state outputs.  
- **3-State Outputs:** Allows multiple devices to share a common bus.  
- **TTL-Compatible Inputs:** Works with TTL logic levels.  
- **High Noise Immunity:** Typical CMOS noise margin.  
- **Low Power Consumption:** Balanced with high-speed performance.  
- **ESD Protection:** HBM > 2000V, MM > 200V.  

### **Applications:**  
- Bus driving and buffering in digital systems.  
- Memory address driving.  
- Data transmission control.  

For detailed electrical characteristics and timing diagrams, refer to the official STMicroelectronics datasheet.

Application Scenarios & Design Considerations

HCT240: INVERTED

Alternative Part Number

  • CD74HCT244E --: Pin-compatible HCT octal buffer/driver with same 74HCT244 function and widely available from a different manufacturer.
  • 74HCT244N --: Standard 74HCT244 octal buffer in DIP package, direct functional equivalent with different naming prefix.
  • MC74HCT244ADWR2G --: HCT244 octal buffer/driver in SOIC package, electrically compatible alternative from another vendor.
  • SN74HCT244N --: Direct functional equivalent octal buffer/driver with HCT input thresholds, suitable drop-in replacement in most designs.

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