MCP4352T-104E/ST

Digital Potentiometers Overview

The MCP4352T-104E/ST is a quad-channel digital potentiometer IC featuring volatile memory and an SPI serial interface. It provides four independent rheostat configurations with 8-bit resolution, offering 257 taps per channel. The nominal resistance between terminals A and B is 100 kΩ (indicated by the '104' suffix). The device operates within a supply voltage range of 1.8V to 5.5V, supporting high-voltage tolerant digital inputs up to 12.5V. Key electrical characteristics include a typical wiper resistance of 75 Ω, a bandwidth of 1 MHz for the 100 kΩ variant, and an extended operating temperature range from -40°C to +125°C.

Digital Potentiometers Feature Summary

• Quad resistor network with 8-bit resolution (257 taps) and 100 kΩ nominal resistance.
• SPI serial interface supporting 10 MHz operation in Modes 0,0 and 1,1.
• High-voltage tolerant digital inputs capable of withstanding up to 12.5V.
• Rheostat configuration with terminal disconnect feature via TCON register.

Digital Potentiometers Applications

• Variable gain control in audio processing circuits.
• Programmable biasing networks in sensor interfaces.
• Adjustable reference voltage generation in data acquisition systems.
• Impedance matching in RF signal paths.

Digital Potentiometers Procurement Notes

Verify the ordering suffix 'T' indicates tape-and-reel packaging and '/ST' denotes the TSSOP-20 package. Confirm the '104' code corresponds to the 100 kΩ resistance value. Ensure the application requires volatile memory, as settings are lost upon power cycle. Check that the system voltage supports the 1.8V minimum operating threshold if low-power operation is intended.

Digital Potentiometers Selection Notes

Select this component when a quad-channel rheostat configuration is required with SPI connectivity. The 100 kΩ resistance value suits applications needing higher impedance levels compared to the 5 kΩ or 10 kΩ variants. Choose this over non-volatile models (MCP436X) if power consumption during standby is critical, as volatile RAM consumes less current than EEPROM. Ensure the host controller supports the required SPI clock speeds and modes.

Digital Potentiometers Part Context

This part belongs to the MCP433X/435X family of 7/8-bit quad SPI digital potentiometers. The '5' in the model number specifies 8-bit resolution (257 taps), distinguishing it from the '3' series which offers 7-bit resolution. The '2' suffix indicates a quad rheostat configuration, whereas '1' would denote a quad potentiometer. The 'T' suffix typically signifies tape-and-reel packaging for automated assembly.

Digital Potentiometers Replacement Considerations

Direct pin-compatible replacements within the same family include MCP4351T-104E/ST (potentiometer configuration) or MCP4332T-104E/ST (7-bit resolution). For non-volatile requirements, consider the MCP4362T-104E/ST, noting the increased operating voltage minimum of 2.7V. Verify that any substitute maintains the 100 kΩ resistance and TSSOP-20 package dimensions.