Overview
The MC74HC244ADWR2G is an octal 3-state noninverting buffer/line driver/line receiver produced by onsemi. This device is part of the HC244A series, which is designed to be used in various bus-oriented systems, including 3-state memory address drivers and clock drivers. The MC74HC244ADWR2G is compatible with standard CMOS outputs and, with pull-up resistors, can also interface with LSTTL outputs. It features noninverting outputs and two active-low output enables, making it versatile for different logic applications.
Key Specifications
| Parameter | Min | Max | Unit |
|---|---|---|---|
| DC Supply Voltage (VCC) | 2.0 | 6.0 | V |
| DC Input Voltage (VIN) | -0.5 | VCC + 0.5 | V |
| DC Output Voltage (VOUT) | -0.5 | VCC + 0.5 | V |
| DC Input Current, per Pin (IIN) | -20 | 20 | mA |
| DC Output Current, per Pin (IOUT) | -35 | 35 | mA |
| Storage Temperature (TSTG) | -65 | 150 | °C |
| Operating Free-Air Temperature (TA) | -55 | 125 | °C |
| Input Rise or Fall Time (tr, tf) | 0 | 1000 (at VCC = 2.0V), 500 (at VCC = 4.5V), 400 (at VCC = 6.0V) | ns |
| Maximum Propagation Delay, A to YA or B to YB (tPLH, tPHL) | 96 (at VCC = 2.0V), 50 (at VCC = 4.5V), 18 (at VCC = 6.0V) | - | ns |
Key Features
- Output Drive Capability: 15 LSTTL Loads
- Outputs Directly Interface to CMOS, NMOS, and TTL
- Operating Voltage Range: 2.0 to 6.0 V (HC), 4.5 to 5.5 V (HCT)
- 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 MC74HC244ADWR2G is designed for use in various bus-oriented systems, including:
- 3-state memory address drivers
- Clock drivers
- Level conversion for interfacing TTL or NMOS outputs to High-Speed CMOS inputs
- General-purpose logic applications requiring noninverting buffers and line drivers
Q & A
- What is the operating voltage range of the MC74HC244ADWR2G?
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 maximum propagation delay for the MC74HC244ADWR2G?
The maximum propagation delay varies by voltage: 96 ns at VCC = 2.0 V, 50 ns at VCC = 4.5 V, and 18 ns at VCC = 6.0 V.
- Is the MC74HC244ADWR2G compatible with TTL outputs?
- What is the maximum output current per pin for the MC74HC244ADWR2G?
The maximum output current per pin is ±35 mA.
- What are the storage and operating temperature ranges for the MC74HC244ADWR2G?
The storage temperature range is -65°C to 150°C, and the operating free-air temperature range is -55°C to 125°C.
- Is the MC74HC244ADWR2G RoHS compliant?
- What is the input rise or fall time for the MC74HC244ADWR2G?
The input rise or fall time varies by voltage: 0 ns at VCC = 2.0 V, 500 ns at VCC = 4.5 V, and 400 ns at VCC = 6.0 V.
- How many FETs or equivalent gates does the MC74HC244ADWR2G contain?
The device contains 136 FETs or 34 equivalent gates.
- What are the package options for the MC74HC244ADWR2G?
The device is available in SOIC-20 Wide and TSSOP-20 packages.
- Is the MC74HC244ADWR2G qualified for automotive applications?
