Overview
The MC74HC244ADWG, produced by onsemi, is an octal 3-state noninverting buffer/line driver/line receiver. This device is identical in pinout to the LS244 and is designed to be used with 3-state memory address drivers, clock drivers, and other bus-oriented systems. It features noninverting outputs and two active-low output enables, making it suitable for a wide range of applications. The device inputs are compatible with standard CMOS outputs and, with pullup resistors, can also be compatible with LSTTL outputs.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| DC Supply Voltage (VCC) | –0.5 to +6.5 | V |
| DC Input Voltage (VIN) | –0.5 to VCC + 0.5 | V |
| DC Output Voltage (VOUT) | –0.5 to VCC + 0.5 | V |
| Operating Voltage Range | 2.0 to 6.0 V (HC), 4.5 to 5.5 V (HCT) | V |
| Minimum High-Level Input Voltage (VIH) | 2.0 to 6.0 V (HC), 2.0 V (HCT) | V |
| Maximum Low-Level Input Voltage (VIL) | 0.5 to 1.8 V (HC), 0.8 V (HCT) | V |
| Maximum Input Leakage Current (IIN) | ±1.0 μA | μA |
| Maximum Three-State Leakage Current (IOZ) | ±10 μA | μA |
| Maximum Quiescent Supply Current (ICC) | 40 to 160 μA | μA |
| Storage Temperature (TSTG) | –65 to +150 °C | °C |
| Lead Temperature (TL) | 260 °C | °C |
| Junction Temperature Under Bias (TJ) | ±150 °C | °C |
Key Features
- Output Drive Capability: 15 LSTTL Loads
- Outputs Directly Interface to CMOS, NMOS, and TTL
- Low Input Current: 1 μA
- High Noise Immunity Characteristic of CMOS Devices
- In Compliance with the Requirements Defined by JEDEC Standard No. 7A
- Chip Complexity: 136 FETs or 34 Equivalent Gates
- Pb-Free, Halogen Free, and RoHS Compliant
- AEC-Q100 Qualified and PPAP Capable for automotive and other applications requiring unique site and control change requirements
Applications
The MC74HC244ADWG is versatile and can be used in various applications, including:
- 3-state memory address drivers
- Clock drivers
- Bus-oriented systems
- Level conversion for interfacing TTL or NMOS outputs to High-Speed CMOS inputs
- Automotive, industrial, and consumer electronics where high noise immunity and low power consumption are critical
Q & A
- What is the operating voltage range of the MC74HC244ADWG?
The operating voltage range is 2.0 to 6.0 V for the HC version and 4.5 to 5.5 V for the HCT version. - What is the output drive capability of this device?
The output drive capability is up to 15 LSTTL loads. - Is the MC74HC244ADWG compatible with TTL outputs?
Yes, the device inputs are compatible with standard CMOS outputs and, with pullup resistors, can also be compatible with LSTTL outputs. - What is the maximum input leakage current?
The maximum input leakage current is ±1.0 μA. - Is the MC74HC244ADWG RoHS compliant?
Yes, the device is Pb-Free, Halogen Free, and RoHS Compliant. - What are the typical applications of the MC74HC244ADWG?
Typical applications include 3-state memory address drivers, clock drivers, and other bus-oriented systems. - How many FETs or equivalent gates does the chip contain?
The chip contains 136 FETs or 34 equivalent gates. - What is the storage temperature range for the MC74HC244ADWG?
The storage temperature range is –65 to +150 °C. - Is the MC74HC244ADWG AEC-Q100 qualified?
Yes, the device is AEC-Q100 qualified and PPAP capable for automotive and other applications requiring unique site and control change requirements. - What is the maximum propagation delay for the MC74HC244ADWG?
The maximum propagation delay from input to output is up to 30 ns for the HC version and similar for the HCT version.
