Overview
The MC74HC4851ADR2G, produced by onsemi, is an analog multiplexer/demultiplexer integrated circuit designed for various applications, particularly in automotive environments. This device is pin-compatible with standard HC405x and MC1405xB analog mux/demux devices but features advanced injection current effect control. This technology allows signals at disabled analog input channels to exceed the supply voltage range without affecting the signal of the enabled analog channel, eliminating the need for external diode/resistor networks. The MC74HC4851A utilizes low power silicon gate CMOS technology, making it suitable for low-power and high-reliability applications.
Key Specifications
| Parameter | Condition | Guaranteed Limit | Unit |
|---|---|---|---|
| VCC (Positive DC Supply Voltage) | Referenced to GND | –0.5 to +7.0 | V |
| Vin (DC Input Voltage) | Any Pin, Referenced to GND | –0.5 to VCC + 0.5 | V |
| I (DC Current, Into or Out of Any Pin) | ±25 | mA | |
| PD (Power Dissipation in Still Air) | SOIC Package | 500 | mW |
| PD (Power Dissipation in Still Air) | TSSOP Package | 450 | mW |
| Tstg (Storage Temperature Range) | –65 to +150 | °C | |
| TL (Lead Temperature, 1 mm from Case for 10 Seconds) | SOIC or TSSOP Package | 260 | °C |
| VIH (Minimum High-Level Input Voltage) | Channel-Select or Enable Inputs, VCC = 2.0 to 6.0 V | 1.50 to 4.20 | V |
| VIL (Maximum Low-Level Input Voltage) | Channel-Select or Enable Inputs, VCC = 2.0 to 6.0 V | 0.50 to 1.80 | V |
| Ron (Maximum “ON” Resistance) | Vin = VIL or VIH; VIS = VCC to GND; IS ≤ 2.0 mA | 400 to 1800 | Ω |
| Ioff (Maximum Off-Channel Leakage Current) | Any One Channel, Vin = VCC or GND | ±0.1 to ±1.0 | μA |
Key Features
- Injection Current Effect Control: Allows signals at disabled analog input channels to exceed the supply voltage range without affecting the enabled analog channel.
- Pin Compatibility: Compatible with standard HC405x and MC1405xB analog mux/demux devices.
- Low Power Silicon Gate CMOS Technology: Ensures low power consumption and high reliability.
- Wide Power Supply Range: Operates from 2.0 to 6.0 V.
- Channel Select and Enable Inputs Compatibility: Compatible with standard CMOS outputs.
- Low Injection Current Cross-Coupling: Less than 1 mV/mA.
Applications
The MC74HC4851ADR2G is particularly suited for automotive applications where voltages in excess of normal logic voltage are common. It is also applicable in various other fields requiring analog multiplexing/demultiplexing, such as industrial control systems, medical devices, and telecommunications equipment.
Q & A
- What is the primary function of the MC74HC4851ADR2G?
The MC74HC4851ADR2G is an analog multiplexer/demultiplexer that allows multiple analog signals to be selectively routed to a single output or multiple outputs.
- What is the significance of injection current effect control in this device?
The injection current effect control prevents signals at disabled analog input channels from affecting the signal of the enabled analog channel, even if the signals exceed the supply voltage range.
- What is the power supply range for the MC74HC4851ADR2G?
The device operates from a power supply range of 2.0 to 6.0 V.
- Is the MC74HC4851ADR2G compatible with other standard analog mux/demux devices?
Yes, it is pin-compatible with standard HC405x and MC1405xB analog mux/demux devices.
- What technology does the MC74HC4851ADR2G use?
The device utilizes low power silicon gate CMOS technology.
- What are the typical applications of the MC74HC4851ADR2G?
It is particularly suited for automotive applications and can also be used in industrial control systems, medical devices, and telecommunications equipment.
- What is the maximum “ON” resistance of the MC74HC4851ADR2G?
The maximum “ON” resistance ranges from 400 to 1800 Ω depending on the supply voltage and input conditions.
- How does the device handle high static voltages or electric fields?
The device contains protection circuitry to guard against damage due to high static voltages or electric fields.
- What is the storage temperature range for the MC74HC4851ADR2G?
The storage temperature range is –65 to +150 °C.
- What is the lead temperature for the device during soldering?
The lead temperature should not exceed 260 °C for 10 seconds.
