UPD5201C CMOS Quad SPST Analog Switch
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Prices updated: 12 Oct 2026
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About this product
A CMOS quad single-pole single-throw (SPST) analog switch IC with four independent switches. It offers low on-resistance (45Ω typical), a maximum switching time of 200 ns and TTL/CMOS-compatible control inputs, suiting signal routing, sample-and-hold and sensor multiplexing circuits.
Specifications
- Configuration
- Quad SPST (4 switches)
- On-resistance
- 45Ω typical
- Supply voltage
- ±4.5V to ±20V or +4.5V to +20V
- Switching time
- 200 ns max
- Charge injection
- 5 pC
- Control inputs
- TTL/CMOS compatible
Frequently asked questions
Can I use it with a 3.3V or 5V microcontroller?
Yes for the control inputs, which are TTL/CMOS compatible. The analog supply must still fall within the listed range, +4.5V to +20V or ±4.5V to ±20V, so a 3.3V-only supply is below the minimum and will not work for the switch rail.
What limits its use in precision signal paths?
The 45Ω typical on-resistance can distort signals driving low-impedance loads, and the 5 pC charge injection can affect sample-and-hold circuits. Consider these figures when designing accurate measurement paths.
