Overview
The MC74HC251ADR2G, produced by onsemi, is an 8-Input Data Selector/Multiplexer with 3-State Outputs. This device is part of the high-performance silicon-gate CMOS family and is identical in pinout to the LS251. It is designed to select one of the eight binary data inputs based on the address inputs and features 3-state outputs, making it suitable for bus-oriented systems.
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 |
| Operating Temperature (TA) | -55 | 125 | °C |
| Input Rise and Fall Time | 0 | 1000 (VCC=2.0V), 500 (VCC=4.5V), 400 (VCC=6.0V) | ns |
| Maximum Propagation Delay, Input D to Output Y or Y | 185 (VCC=2.0V), 37 (VCC=4.5V), 31 (VCC=6.0V) | ns | |
| Maximum Propagation Delay, Output Enable to Output Y | 195 (VCC=2.0V), 39 (VCC=4.5V), 33 (VCC=6.0V) | ns | |
| Maximum Input Capacitance | 10 | pF | |
| Maximum Three-State Output Capacitance | 15 | pF | |
| Power Dissipation Capacitance (Per Package) | 36 | pF |
Key Features
- Output Drive Capability: 10 LSTTL Loads
- Outputs Directly Interface to CMOS, NMOS, and TTL
- Operating Voltage Range: 2 to 6 V
- Low Input Current: 1 μA
- High Noise Immunity Characteristic of CMOS Devices
- 3-State Outputs for Bus-Oriented Systems
- AEC-Q100 Qualified and PPAP Capable for Automotive and Other Applications Requiring Unique Site and Control Change Requirements
- Pb-Free, Halogen Free/BFR Free and RoHS Compliant
Applications
The MC74HC251ADR2G is suitable for a variety of applications, including:
- Bus-Oriented Systems: The 3-state outputs allow multiple devices to share the same bus lines.
- Data Selection and Multiplexing: It can select one of eight binary data inputs based on address inputs.
- Automotive Systems: AEC-Q100 qualified and PPAP capable, making it suitable for automotive applications.
- General Digital Logic Circuits: Can be used in various digital logic circuits requiring data selection and multiplexing.
Q & A
- What is the operating voltage range of the MC74HC251ADR2G?
The operating voltage range is from 2 to 6 volts.
- What is the maximum propagation delay from input D to output Y or Y?
The maximum propagation delay is 185 ns for VCC = 2.0V, 37 ns for VCC = 4.5V, and 31 ns for VCC = 6.0V.
- Can the MC74HC251ADR2G be used in bus-oriented systems?
- Is the MC74HC251ADR2G compatible with LSTTL outputs?
- What is the maximum input current of the MC74HC251ADR2G?
The maximum input current is 1 μA.
- Is the MC74HC251ADR2G RoHS compliant?
- What are the package options for the MC74HC251ADR2G?
The device is available in SOIC-16, TSSOP-16, and QFN16 packages.
- What is the storage temperature range for the MC74HC251ADR2G?
The storage temperature range is from -65 to +150 °C.
- Is the MC74HC251ADR2G qualified for automotive applications?
- What is the maximum output transition time for the MC74HC251ADR2G?
The maximum output transition time is 75 ns for VCC = 2.0V, 15 ns for VCC = 4.5V, and 13 ns for VCC = 6.0V.
