Overview
The MC74HC157ADR2 is a quad 2-input multiplexer produced by onsemi, a leading semiconductor supplier. This device is fabricated using advanced high-speed CMOS technology, which combines the benefits of low power dissipation with high-speed operation similar to Bipolar Schottky TTL. The MC74HC157ADR2 consists of four 2-input digital multiplexers with common select and enable inputs, allowing for the selection of data from two sources under the control of a single select input.
This component is particularly useful in applications requiring data routing and selection, such as moving data from two groups of registers to four common output buses. It can also be used as a function generator to implement various logical functions.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| DC Supply Voltage (VCC) | −0.5 to +6.5 | V |
| HIGH Level Input Voltage (VIH) | 1.50 to 5.5 | V |
| LOW Level Input Voltage (VIL) | 0.50 to 0.3 x VCC | V |
| HIGH Level Output Voltage (VOH) | 1.9 to 4.4 | V |
| LOW Level Output Voltage (VOL) | 0.0 to 0.1 | V |
| Input Leakage Current (IIN) | −1.0 to 0.1 | μA |
| Quiescent Supply Current (ICC) | 4.0 to 40.0 | μA |
| Operating Temperature Range | −40°C to +85°C | °C |
Key Features
- High-Speed Operation: Achieves high-speed operation similar to Bipolar Schottky TTL while maintaining low power dissipation.
- Quad 2-Input Multiplexers: Four 2-input digital multiplexers with common select and enable inputs.
- Input Protection: Input protection circuit allows inputs to be driven from 0 V to 5.5 V without regard to the supply voltage.
- Enable Input: Active-LOW enable input; when HIGH, all outputs are forced LOW regardless of other inputs.
- Select Input: Common select input determines which data source is routed to the outputs.
- Multiple Package Options: Available in SOIC-16, TSSOP-16, and QFN16 packages.
Applications
- Data Routing: Moving data from two groups of registers to four common output buses.
- Function Generation: Generating any four of the sixteen different functions of two variables with one variable common.
- Interface Between Systems: Interfacing 5 V to 3 V systems and dual supply systems such as battery backup.
- Gating Functions: Implementing various gating functions in digital circuits.
Q & A
- What is the MC74HC157ADR2?
The MC74HC157ADR2 is a quad 2-input multiplexer produced by onsemi, designed for high-speed CMOS applications.
- What is the operating voltage range of the MC74HC157ADR2?
The DC supply voltage (VCC) ranges from −0.5 to +6.5 volts.
- How does the enable input function?
The enable input is active-LOW; when it is HIGH, all outputs are forced LOW regardless of other inputs.
- What is the purpose of the select input?
The select input determines which data source (I0x or I1x) is routed to the corresponding outputs.
- What are the package options for the MC74HC157ADR2?
It is available in SOIC-16, TSSOP-16, and QFN16 packages.
- Can the MC74HC157ADR2 be used in mixed voltage systems?
Yes, it can be used to interface 5 V to 3 V systems and in dual supply systems such as battery backup.
- What is the input protection feature of the MC74HC157ADR2?
The input protection circuit allows inputs to be driven from 0 V to 5.5 V without regard to the supply voltage.
- What are some common applications of the MC74HC157ADR2?
Common applications include data routing, function generation, and implementing gating functions in digital circuits.
- What is the operating temperature range of the MC74HC157ADR2?
The operating temperature range is from −40°C to +85°C.
- How does the MC74HC157ADR2 handle unused inputs and outputs?
Unused inputs must be tied to an appropriate logic voltage level (e.g., GND or VCC), and unused outputs must be left open.
