Overview
The SN74HC4851PWRG4 is an 8-channel analog multiplexer/demultiplexer produced by Texas Instruments. This device is part of the SN74HC series, known for its high-speed CMOS logic. Although the SN74HC4851 has been discontinued, it remains relevant for existing designs and legacy systems. The device is packaged in a 16-pin TSSOP (Thin Shrink Small Outline Package) and is RoHS compliant.
The SN74HC4851PWRG4 features injection-current control, which helps in minimizing the impact of disabled analog input channels on the enabled channel, eliminating the need for external diode/resistor networks. This makes it suitable for applications requiring precise analog signal handling.
Key Specifications
| Parameter | Min | Nom | Max | Unit |
|---|---|---|---|---|
| VCC Supply Voltage | -0.5 | 2, 3.3, 4.5, 5.5 | 6 | V |
| VIH Input Logic High | 2.1 (VCC=2V), 2.3 (VCC=3V), 3.15 (VCC=4.5V), 4.2 (VCC=5.5V) | V | ||
| VIL Input Logic Low | 0 | 0.5 (VCC=2V), 0.7 (VCC=2.5V), 0.8 (VCC=3.3V), 0.95 (VCC=4.5V), 1.05 (VCC=5.5V) | V | |
| TA Ambient Temperature | -40 | 125 | °C | |
| IDD VCC Supply Current | 2, 20, 40 µA (depending on VCC) | µA | ||
| CIC Control Input Capacitance | 3.5, 10 pF | pF | ||
| CIS Common Terminal Capacitance | 22, 40 pF | pF | ||
| COS Switch Terminal Capacitance | 6.7, 15 pF | pF | ||
| CPD Power Dissipation Capacitance | 32 (3.3V), 37 (5V) pF | pF |
Key Features
- Injection-Current Control: Minimizes the impact of disabled analog input channels on the enabled channel, eliminating the need for external diode/resistor networks.
- High-Speed CMOS Logic: Part of the SN74HC series, known for its high-speed CMOS logic.
- 8-Channel Multiplexing/Demultiplexing: Allows for the selection of one of eight analog input channels to be connected to a common output channel.
- Low On-State Resistance: Ensures minimal signal degradation.
- Wide Operating Voltage Range: Compatible with supply voltages from 2V to 5.5V.
- RoHS Compliant: Meets the current EU RoHS standards.
Applications
- Analog Signal Switching: Ideal for applications requiring the switching of multiple analog signals.
- Data Acquisition Systems: Used in data acquisition systems where multiple analog inputs need to be multiplexed.
- Industrial Control Systems: Suitable for industrial control systems that require precise analog signal handling.
- Medical Devices: Can be used in medical devices where multiple analog signals need to be processed.
- Automotive Systems: Although the standard version is discontinued, the automotive-qualified version (SN74HC4851-Q1) is available for high-reliability automotive applications.
Q & A
- What is the SN74HC4851PWRG4 used for?
The SN74HC4851PWRG4 is an 8-channel analog multiplexer/demultiplexer used for switching and selecting one of eight analog input channels to be connected to a common output channel.
- What is the operating voltage range of the SN74HC4851PWRG4?
The operating voltage range is from 2V to 5.5V.
- Is the SN74HC4851PWRG4 RoHS compliant?
- What is the package type of the SN74HC4851PWRG4?
The device is packaged in a 16-pin TSSOP (Thin Shrink Small Outline Package).
- What is the significance of injection-current control in the SN74HC4851PWRG4?
Injection-current control minimizes the impact of disabled analog input channels on the enabled channel, eliminating the need for external diode/resistor networks.
- What are the typical applications of the SN74HC4851PWRG4?
Typical applications include analog signal switching, data acquisition systems, industrial control systems, and medical devices.
- Is the SN74HC4851PWRG4 still in production?
No, the SN74HC4851 has been discontinued by Texas Instruments, but it may still be available from some distributors or for legacy system support.
- What is the ambient temperature range for the SN74HC4851PWRG4?
The ambient temperature range is from -40°C to 125°C.
- What is the maximum supply current for the SN74HC4851PWRG4?
The maximum supply current (IDD) is 40 µA at 5.5V VCC.
- Are there any automotive-qualified versions of the SN74HC4851?
