Overview
The MC74AC253DR2G, produced by onsemi, is a dual 4-input multiplexer with 3-state outputs. This device is designed to select two bits of data from four sources using common select inputs. It is part of the 74AC and 74ACT series, which are known for their high-speed and low-power consumption characteristics. The MC74AC253DR2G is particularly useful in bus-oriented systems due to its ability to switch outputs to a high impedance state, allowing for direct interface with other bus systems.
Key Specifications
| Parameter | Value | Unit | Conditions |
|---|---|---|---|
| VCC (Supply Voltage) | 2.0 to 6.0 | V | 74AC Series |
| VCC (Supply Voltage) | 4.5 to 5.5 | V | 74ACT Series |
| VIH (Minimum High Level Input Voltage) | 2.1 to 3.85 | V | VCC = 3.0 to 5.5 V |
| VIL (Maximum Low Level Input Voltage) | 0.9 to 1.65 | V | VCC = 3.0 to 5.5 V |
| VOH (Minimum High Level Output Voltage) | 2.9 to 5.49 | V | IOUT = -50 μA |
| VOL (Maximum Low Level Output Voltage) | 0.1 | V | IOUT = 50 μA |
| IOH (Output Current - High) | -24 mA | mA | VCC = 4.5 to 5.5 V |
| IOL (Output Current - Low) | 24 mA | mA | VCC = 4.5 to 5.5 V |
| tPLH (Propagation Delay) | 2.0 to 17.5 | ns | CL = 50 pF, TA = -40 to 85°C |
| tPHL (Propagation Delay) | 2.5 to 18.0 | ns | CL = 50 pF, TA = -40 to 85°C |
| TSTG (Storage Temperature Range) | -65 to 150 | °C |
Key Features
- Multifunctional Capability: The device acts as a dual 4-input multiplexer with 3-state outputs, allowing for flexible data selection and output control.
- Noninverting 3-State Outputs: Outputs can be switched to a high impedance state, enabling direct interface with bus-oriented systems.
- High Output Drive Capability: Outputs can source/sink up to 24 mA, making it suitable for driving various loads.
- TTL Compatible Inputs (74ACT Series): The 74ACT series has TTL compatible inputs, ensuring compatibility with a wide range of logic circuits.
- Pb-Free Devices: The MC74AC253DR2G is lead-free, complying with environmental regulations and standards.
Applications
- Bus-Oriented Systems: The 3-state outputs allow the device to interface directly with bus systems, making it ideal for applications requiring data multiplexing on a common bus.
- Digital Switching Circuits: The device can be used as a logic implementation of a 2-pole, 4-position switch, making it suitable for various digital switching applications.
- Communication Systems: It can be used in communication systems where data needs to be multiplexed and switched between different sources.
- Embedded Systems: The MC74AC253DR2G can be used in embedded systems where low power consumption and high-speed data multiplexing are required.
Q & A
- What is the primary function of the MC74AC253DR2G?
The primary function is to act as a dual 4-input multiplexer with 3-state outputs, selecting two bits of data from four sources using common select inputs.
- What are the supply voltage ranges for the 74AC and 74ACT series?
The supply voltage range for the 74AC series is 2.0 to 6.0 V, and for the 74ACT series, it is 4.5 to 5.5 V.
- What is the maximum output current for the MC74AC253DR2G?
The device can source/sink up to 24 mA.
- Is the MC74AC253DR2G Pb-free?
Yes, the MC74AC253DR2G is a Pb-free device.
- What is the propagation delay for the MC74AC253DR2G?
The propagation delay ranges from 2.0 to 17.5 ns, depending on the operating conditions.
- Can the outputs of the MC74AC253DR2G be tied together?
Yes, but all but one device must be in the high impedance state to avoid high currents that would exceed the maximum ratings.
- What are the common applications of the MC74AC253DR2G?
Common applications include bus-oriented systems, digital switching circuits, communication systems, and embedded systems.
- What is the storage temperature range for the MC74AC253DR2G?
The storage temperature range is -65 to 150°C.
- Does the 74ACT series have TTL compatible inputs?
Yes, the 74ACT series has TTL compatible inputs.
- What is the maximum power dissipation for the MC74AC253DR2G?
The maximum power dissipation is 500 mW at 65°C, derating to 300 mW by 10 mW/°C from 65°C to 85°C.
