Overview
The 74AHC244D, produced by Nexperia (formerly part of NXP Semiconductors), is an 8-bit buffer/line driver with 3-state outputs. This device can be utilized as two 4-bit buffers or a single 8-bit buffer, making it versatile for various digital logic applications. It features two output enables (1OE and 2OE), each controlling four of the 3-state outputs, allowing for flexible control over the output states. The device is designed to operate in mixed voltage environments due to its overvoltage tolerant inputs and supports a wide supply voltage range from 2.0 V to 5.5 V.
Key Specifications
| Type number | VCC (V) | Logic switching levels | Output drive capability (mA) | fmax (MHz) | Number of bits | Power dissipation considerations | Tamb (°C) | Rth(j-a) (K/W) | Rth(j-c) (K/W) | Package name |
|---|---|---|---|---|---|---|---|---|---|---|
| 74AHC244D | 2.0 - 5.5 | CMOS | ± 8 | 60 | 8 | Low | -40 ~ 125 | 85 | 61 | SO20 (SOT163-1) |
Key Features
- Wide Supply Voltage Range: Operates from 2.0 V to 5.5 V.
- 3-State Outputs: Each output can be set to a high-impedance OFF-state by a HIGH on the corresponding output enable (nOE).
- Overvoltage Tolerant Inputs: Allows use in mixed voltage environments.
- CMOS Low Power Dissipation: Low power consumption.
- High Noise Immunity: Inputs have Schmitt-trigger action for improved noise immunity.
- ESD Protection: Human Body Model (HBM) exceeds 2000 V and Charged Device Model (CDM) exceeds 1000 V.
- Multiple Package Options: Available in SO20, TSSOP20, and DHVQFN20 packages.
Applications
The 74AHC244D is suitable for a wide range of applications across various industries, including:
- Automotive: For use in automotive systems requiring robust and reliable digital logic.
- Industrial: In industrial control systems and automation.
- Consumer Electronics: In mobile, computing, and consumer electronic devices.
- Power and Computing: For power management and computing applications requiring low power and high reliability.
Q & A
- What is the primary function of the 74AHC244D?
The 74AHC244D is an 8-bit buffer/line driver with 3-state outputs, which can be used as two 4-bit buffers or one 8-bit buffer.
- What is the supply voltage range for the 74AHC244D?
The device operates from 2.0 V to 5.5 V.
- What are the logic switching levels for the 74AHC244D?
The logic switching levels are CMOS.
- What is the output drive capability of the 74AHC244D?
The output drive capability is ± 8 mA.
- What is the maximum operating frequency of the 74AHC244D?
The maximum operating frequency is 60 MHz.
- What are the package options available for the 74AHC244D?
The device is available in SO20, TSSOP20, and DHVQFN20 packages.
- Does the 74AHC244D have ESD protection?
Yes, it has ESD protection exceeding 2000 V for HBM and 1000 V for CDM.
- What is the operating temperature range for the 74AHC244D?
The operating temperature range is from -40 °C to +125 °C.
- Can the 74AHC244D be used in mixed voltage environments?
Yes, due to its overvoltage tolerant inputs.
- What is the power dissipation characteristic of the 74AHC244D?
The device has low power dissipation.
