Overview
The MC74HC244ADWR2, produced by onsemi, is an octal 3-state noninverting buffer/line driver/line receiver. This device is part of the HC/UH series and is designed to be used in various bus-oriented systems, including 3-state memory address drivers, clock drivers, and other similar applications. It is identical in pinout to the LS244 and offers compatibility with standard CMOS outputs, as well as LSTTL outputs with pull-up resistors. The MC74HC244A and MC74HCT244A versions can also serve as level converters for interfacing TTL or NMOS outputs to high-speed CMOS inputs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| DC Supply Voltage (VCC) | 2.0 to 6.0 (HC), 4.5 to 5.5 (HCT) | V |
| DC Input Voltage (VIN) | -0.5 to VCC + 0.5 | V |
| DC Output Voltage (VOUT) | -0.5 to VCC + 0.5 | V |
| DC Input Current (IIN) per Pin | ±20 | mA |
| DC Output Current (IOUT) per Pin | ±35 | mA |
| DC Supply Current (ICC) | ±75 | mA |
| Input Clamp Current (IIK) | ±20 | mA |
| Output Clamp Current (IOK) | ±20 | mA |
| Storage Temperature (TSTG) | -65 to +150 | °C |
| Lead Temperature (TL) | 260 | °C |
| Junction Temperature Under Bias (TJ) | -150 | °C |
| Thermal Resistance (JA) | Varies by package | °C/W |
| Operating Temperature Range | -40 to +125 | °C |
| Propagation Delay (tpd) | 165 ns | ns |
| Load Capacitance | 50 pF | pF |
| Package Type | SOIC-20, TSSOP-20 | |
| Number of Pins | 20 | |
| RoHS Status | ROHS3 Compliant |
Key Features
- Output Drive Capability: Can drive up to 15 LSTTL loads and directly interface with CMOS, NMOS, and TTL devices.
- Operating Voltage Range: Operates from 2.0 to 6.0 V (HC) and 4.5 to 5.5 V (HCT).
- Low Input Current: Extremely low input current of 1.0 µA.
- High Noise Immunity: Characteristic of CMOS devices, providing robust performance in noisy environments.
- 3-State Outputs: Non-inverting outputs with two active-low output enables, allowing for high-impedance state control.
- Environmental Compliance: Pb-free, halogen-free, and RoHS compliant.
- Temperature Range: Operates from -40°C to +125°C.
- Low Power Consumption: Maximum of 80 µA under full load, making it suitable for battery-powered and low-power applications.
- Robust Output Drive: Can drive ±6 mA at 5V, suitable for controlling other devices or components.
- Bus Interface: Octal bus interface, ideal for bus-oriented systems and data communication networks.
Applications
- Motor Drivers: Used to control signals sent to motors in both hobbyist and industrial applications.
- LED Displays: Manages data and control signals for LED displays, ensuring clear and stable visual output.
- Servers and Telecom Infrastructure: Efficiently handles data transmission and signal management in large-scale systems.
- Bus-Oriented Systems: Ideal for systems requiring streamlined data management between different components.
- Low-Power Applications: Suitable for battery-powered devices and other applications where power efficiency is crucial.
Q & A
- What is the MC74HC244ADWR2 used for?
The MC74HC244ADWR2 is an octal 3-state noninverting buffer/line driver/line receiver used in various bus-oriented systems, including 3-state memory address drivers, clock drivers, and other similar applications.
- What is the operating voltage range of the MC74HC244ADWR2?
The operating voltage range is from 2.0 to 6.0 V for the HC version and 4.5 to 5.5 V for the HCT version.
- How many LSTTL loads can the MC74HC244ADWR2 drive?
The device can drive up to 15 LSTTL loads.
- What is the input current of the MC74HC244ADWR2?
The input current is extremely low at 1.0 µA.
- Is the MC74HC244ADWR2 environmentally friendly?
Yes, it is Pb-free, halogen-free, and RoHS compliant.
- What is the temperature range of the MC74HC244ADWR2?
The device operates from -40°C to +125°C.
- How much power does the MC74HC244ADWR2 consume?
The device consumes a maximum of 80 µA under full load.
- What is the output drive capability of the MC74HC244ADWR2?
The device can drive ±6 mA at 5V.
- Can the MC74HC244ADWR2 handle high noise environments?
Yes, it has high noise immunity characteristic of CMOS devices.
- What types of applications benefit from using the MC74HC244ADWR2?
It is suitable for motor drivers, LED displays, servers, telecom infrastructure, and other bus-oriented systems.
- What package types are available for the MC74HC244ADWR2?
The device is available in SOIC-20 and TSSOP-20 packages.
