Overview
The MC74AC244DWR2G, produced by onsemi, is an octal buffer and line driver designed for various applications in digital electronics. This component is part of the 74AC series, which is known for its high-speed and low-power consumption characteristics. It is particularly suited for use as a memory address driver, clock driver, and bus-oriented transmitter or receiver, enhancing the density of PC boards.
Key Specifications
| Parameter | Value | Unit | Conditions |
|---|---|---|---|
| VCC (DC Supply Voltage) | 2.0 to 6.0 | V | Referenced to GND |
| VIN (DC Input Voltage) | −0.5 to VCC + 0.5 | V | Referenced to GND |
| VOUT (DC Output Voltage) | −0.5 to VCC + 0.5 | V | Referenced to GND |
| IOH (Output Current - High) | −24 mA | mA | VOUT = 0.1 V |
| IOL (Output Current - Low) | 24 mA | mA | VOUT = 0.1 V |
| VIH (Minimum High Level Input Voltage) | 2.1 to 3.85 V | V | VCC = 3.0 to 5.5 V |
| VIL (Maximum Low Level Input Voltage) | 0.9 to 1.65 V | V | VCC = 3.0 to 5.5 V |
| VOH (Minimum High Level Output Voltage) | 2.9 to 5.49 V | V | IOUT = −50 μA |
| VOL (Maximum Low Level Output Voltage) | 0.1 V | V | IOUT = 50 μA |
| tPLH (Propagation Delay) | 1.5 to 9.5 ns | ns | CL = 50 pF, TA = −40°C to +85°C |
| tPHL (Propagation Delay) | 1.5 to 9.5 ns | ns | CL = 50 pF, TA = −40°C to +85°C |
| TJ (Junction Temperature) | −40 to 140 °C | °C | Under Bias |
Key Features
- 3-State Outputs: Capable of driving bus lines or buffering memory address registers.
- High Output Drive Capability: Outputs can source/sink up to 24 mA.
- TTL Compatible Inputs: The ′ACT244 version has TTL compatible inputs.
- Pb-Free Devices: Compliant with lead-free requirements.
- Low Power Consumption: Part of the 74AC series known for low power consumption.
- High-Speed Operation: Suitable for high-speed applications with propagation delays as low as 1.5 ns.
Applications
- Memory Address Drivers: Ideal for driving memory address lines in various memory systems.
- Clock Drivers: Can be used to distribute clock signals across a system.
- Bus-Oriented Transmitters/Receivers: Suitable for use in bus-oriented systems to transmit or receive data.
- PC Board Density Enhancement: Helps in improving the density of PC boards by providing multiple buffer functions in a single package.
Q & A
- What is the MC74AC244DWR2G used for?
The MC74AC244DWR2G is an octal buffer and line driver used as a memory address driver, clock driver, and bus-oriented transmitter or receiver.
- What is the voltage range for the VCC supply?
The VCC supply voltage range is from 2.0 to 6.0 volts.
- What is the maximum output current for the MC74AC244DWR2G?
The outputs can source/sink up to 24 mA.
- Is the MC74AC244DWR2G Pb-free?
Yes, the MC74AC244DWR2G is a Pb-free device.
- What are the typical propagation delays for the MC74AC244DWR2G?
The propagation delays range from 1.5 to 9.5 ns depending on the operating conditions.
- What are the operating temperature ranges for the MC74AC244DWR2G?
The operating ambient temperature range is from −40°C to +85°C.
- What is the maximum junction temperature for the MC74AC244DWR2G?
The maximum junction temperature is 140°C under bias.
- Does the MC74AC244DWR2G have TTL compatible inputs?
The ′ACT244 version of the MC74AC244DWR2G has TTL compatible inputs.
- What are the typical input rise and fall times for the MC74AC244DWR2G?
The input rise and fall times vary depending on VCC, but are typically in the range of 25 to 150 ns/V for 74AC devices and 8 to 10 ns/V for 74ACT devices.
- What is the package type for the MC74AC244DWR2G?
The MC74AC244DWR2G is available in SOIC-20 and TSSOP-20 packages.
