Overview
The CD74HC4051MDREP, produced by Texas Instruments, is a high-speed CMOS analog multiplexer/demultiplexer. This device utilizes silicon gate CMOS technology to achieve operating speeds similar to LSTTL with the low power consumption of standard CMOS integrated circuits. It is designed to control analog voltages that may vary across the voltage supply range, making it a versatile component for various applications. The CD74HC4051MDREP is particularly noted for its bidirectional switching capability, allowing any analog input to be used as an output and vice versa, with low ON resistance and low OFF leakages.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Number of Channels | 8 | - |
| ON Resistance | 70Ω (typical at VCC – VEE = 4.5V) | Ω |
| Operating Temperature Range | –55°C to +125°C | °C |
| Package Type | SOIC-16 Enhanced | - |
| Supply Voltage Range | 2V to 6V | V |
| Switch Voltage Range | 0V to 10V | V |
| Propagation Delay | Typically 10 ns | ns |
| Input Leakage Current | ≤ 1µA at VOL, VOH | µA |
Key Features
- Qualified for automotive applications.
- Wide analog input voltage range: ±5V maximum.
- Low ON-resistance: 70Ω typical (VCC – VEE = 4.5V).
- Low crosstalk between switches.
- Fast switching and propagation speeds.
- Break-before-make switching.
- Direct LSTTL input logic compatibility: VIL = 0.8V maximum, VIH = 2V minimum.
- CMOS input compatibility.
Applications
- Multi-channel data acquisition systems, especially when integrated with ADCs like the ADS7924IRTER.
- Audio mixers: routing multiple audio inputs to a common ADC for digitization.
- Robotic sensor hubs: reading various sensors and feeding data to an ADC for processing.
- Portable signal analyzers: monitoring multiple signal inputs in field testing.
- Automotive applications due to its wide operating temperature range and reliability.
Q & A
- Q: What is the primary function of the CD74HC4051MDREP?
A: The CD74HC4051MDREP is an 8-channel analog multiplexer/demultiplexer that controls analog voltages and allows bidirectional switching between inputs and outputs. - Q: What is the typical ON resistance of the CD74HC4051MDREP?
A: The typical ON resistance is 70Ω when VCC – VEE = 4.5V. - Q: What is the operating temperature range of the CD74HC4051MDREP?
A: The operating temperature range is –55°C to +125°C. - Q: Can the CD74HC4051MDREP handle digital signals as well as analog signals?
A: Yes, it is designed for both analog and digital signal routing. - Q: How do you select an input channel on the CD74HC4051MDREP?
A: Use digital signals from a microcontroller to control the address pins of the multiplexer. - Q: What is the advantage of using the CD74HC4051MDREP with an ADC like the ADS7924IRTER?
A: It allows multiple input channels to be connected to a single ADC, reducing circuit complexity and cost. - Q: Is there any significant delay introduced by using this multiplexer?
A: The CD74HC4051MDREP has a typical propagation delay of about 10 ns, which is negligible for most data acquisition applications. - Q: What package type is the CD74HC4051MDREP available in?
A: It is available in SOIC-16 Enhanced package. - Q: What is the supply voltage range for the CD74HC4051MDREP?
A: The supply voltage range is 2V to 6V. - Q: Is the CD74HC4051MDREP qualified for automotive applications?
A: Yes, it is qualified for automotive applications.
