CD4051BCSJ

Analog Switches, Multiplexers, Demultiplexers Overview

The CD4051BCSJ is a single-ended analog multiplexer manufactured by Fairchild Semiconductor, housed in a 16-pin SOIC package. It provides eight independent channels controlled by three binary address inputs (A, B, C) and an inhibit input (INH). The device operates with a supply voltage range of 3V to 15V between VDD and VSS, supporting analog signal swings up to 15V peak-to-peak when utilizing dual supplies. Key electrical parameters include a typical on-resistance of 80Ω at 15V supply and a maximum on-resistance of 1050Ω under specific conditions. Channel leakage current is typically ±10 pA, with a matched on-resistance variation of 5Ω. The component functions within an operating temperature range of -55°C to +125°C.

Analog Switches, Multiplexers, Demultiplexers Feature Summary

• Digitally controlled analog switching with low on-impedance and minimal off-state leakage currents
• Integrated binary address decoding for direct connection to logic outputs without external decoders
• Logic level conversion capability allowing digital control signals to manage wider analog signal ranges
• Extremely low quiescent power dissipation maintained across full supply voltage ranges

Analog Switches, Multiplexers, Demultiplexers Applications

• Data acquisition systems requiring multi-channel signal selection
• Programmable gain amplifier circuits
• Audio signal routing and mixing applications
• Process control instrumentation for sensor multiplexing

Analog Switches, Multiplexers, Demultiplexers Procurement Notes

Verify the manufacturer designation carefully, as the suffix 'S' often indicates Rochester Electronics distribution rather than original Fairchild production. Confirm the package type matches the required SOP-16 or SOIC-16 footprint. Ensure the RoHS compliance status aligns with project requirements, as older stock may differ from current manufacturing standards. Validate the date code and lot traceability if long-term reliability is critical for the application.

Analog Switches, Multiplexers, Demultiplexers Selection Notes

Select this component when an 8-channel single-ended multiplexer is required with wide analog signal handling capabilities. The CD4051BCSJ is suitable for designs needing high off-isolation and low on-resistance matching. Consider the 16-pin surface mount package for compact PCB layouts. Verify that the control logic levels are compatible with the chosen supply voltage to ensure proper channel selection and inhibit functionality.

Analog Switches, Multiplexers, Demultiplexers Part Context

The CD4051 belongs to the standard CMOS 4000 series of analog switches. It serves as a fundamental building block for creating multi-path signal routing networks. The device replaces discrete transistor switches, offering improved consistency and reduced board space. Its compatibility with standard TTL and CMOS logic families facilitates easy integration into microcontroller-based systems.

Analog Switches, Multiplexers, Demultiplexers Replacement Considerations

Direct pin-compatible alternatives include the MC14051 and HEF4051B. Verify that substitute parts maintain the same 16-pin SOIC package and electrical characteristics. Check for any differences in on-resistance specifications or operating temperature ranges before finalizing the replacement.