MAX335CNG

Analog Switches, Multiplexers, Demultiplexers Overview

The MAX335CNG is an analog switch IC featuring eight separately controlled single-pole-single-throw (SPST) switches. It utilizes a serial digital interface compatible with Motorola SPI standards, allowing data to be clocked in via DIN and SCLK while outputting shifted data on DOUT. The device operates with dual power supplies ranging from ±4.5V to ±20V or a single supply up to +30V. It handles rail-to-rail analog signals with an on-resistance of 100Ω typical and 150Ω maximum at +25°C. The component is housed in a 24-pin narrow plastic DIP package and functions within a temperature range of 0°C to +70°C.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Eight individually addressable SPST switches managed by an 8-bit shift register
• Serial interface compatible with standard SPI and Microwire protocols for daisy-chaining multiple devices
• Supports continuous operation with dual supplies from ±4.5V to ±20V or single supply configurations

Analog Switches, Multiplexers, Demultiplexers Applications

• Serial data acquisition systems
• Process control applications
• Avionics signal routing
• Networking equipment

Analog Switches, Multiplexers, Demultiplexers Procurement Notes

Verify the specific suffix CNG corresponds to the 24-pin narrow plastic DIP package and the commercial temperature range of 0°C to +70°C. Confirm that the ordering information matches the required voltage and current specifications for the target application environment. Ensure compatibility with the intended serial communication protocol before integration.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select this component when a compact solution for multiple analog signal paths is required without parallel data lines. The serial interface reduces pin count significantly compared to parallel-controlled switches. Consider the 100Ω on-resistance and 2pF off-capacitance for high-frequency signal integrity requirements. Verify that the logic supply voltage VL aligns with the microcontroller or processor output levels.

Analog Switches, Multiplexers, Demultiplexers Part Context

The MAX335 series provides a serial-controlled alternative to parallel-switched analog multiplexers. It integrates eight SPST switches into a single CMOS package, effectively replacing two quad switches like the DG211. The design simplifies board layout by minimizing control pins, making it suitable for dense PCB designs where space and I/O availability are constrained.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

The datasheet notes equivalence to two DG211 quad switches but controlled via a serial interface rather than parallel inputs. Direct pin-for-pin replacement is not possible due to the different control architecture. Evaluate system timing constraints against the specified turn-on and turn-off times when substituting.