MCP4432T-503E/ST

Digital Potentiometers Overview

The MCP4432T-503E/ST is a quad-channel digital rheostat manufactured by Microchip Technology. It features four independent resistor networks with a nominal resistance of 50 kΩ and 129 taps (7-bit resolution). The device utilizes an I2C serial interface for high-speed read/write access to wiper registers. It operates on a supply voltage ranging from 1.8V to 5.5V, with full analog characteristics specified between 2.7V and 5.5V. The component employs volatile RAM memory for wiper settings and is housed in a TSSOP-14 surface-mount package.

Digital Potentiometers Feature Summary

• Quad Resistor Network: Four independent 50 kΩ rheostats with 129 taps (7-bit resolution) and linear taper.
• I2C Interface: Supports Standard Mode (100 kHz), Fast Mode (400 kHz), and High-Speed modes up to 3.4 MHz.
• High-Voltage Inputs: Digital inputs including HVC/A0 tolerate voltages up to 12.5V, supporting split-rail applications.
• Terminal Control: Includes a TCON register to disconnect resistor network terminals independently.

Digital Potentiometers Applications

• Programmable gain amplifiers requiring precise resistance adjustment.
• Voltage reference trimming in precision measurement circuits.
• Bias current setting in operational amplifier configurations.
• Audio volume control or tone shaping in signal processing chains.

Digital Potentiometers Procurement Notes

Verify the specific ordering suffix against the manufacturer's datasheet to confirm packaging details. The 'T' suffix indicates reel packaging, while other suffixes may denote tube quantities. Confirm that the required I2C clock speed aligns with the bus capacitive loading limits defined in the AC characteristics table.

Digital Potentiometers Selection Notes

Select this model when a quad-channel rheostat configuration is required rather than a potentiometer setup. Ensure the system voltage remains above 2.7V if full analog performance specifications are necessary. Verify that the 50 kΩ resistance value matches the target impedance requirements, as other values like 5 kΩ or 10 kΩ are available in the same family.

Digital Potentiometers Part Context

This component belongs to the MCP443X/5X series of 7-bit and 8-bit volatile quad digital potentiometers. It shares the same pinout and core architecture as the MCP4431 (potentiometer version) and MCP4452 (8-bit resolution version). The primary distinction lies in its rheostat configuration and 7-bit tap count.

Digital Potentiometers Replacement Considerations

The MCP4432-503E/ST serves as the tube-packaged equivalent of this reel-part. For non-volatile memory requirements, consider the MCP4442 series. For 8-bit resolution, the MCP4452 is the direct architectural counterpart.