MCP45HV31T-503E/ST

Digital Potentiometers Overview

The MCP45HV31T-503E/ST is a single-channel, 7-bit volatile digital potentiometer from Microchip Technology. It features an I2C serial interface and supports high-voltage analog operation with terminal voltages up to +36V relative to V-. The device offers a nominal resistance (RAB) of 50 kΩ with 128 taps. Key electrical parameters include a typical wiper resistance of 75 Ω, a bandwidth of 48 kHz at -3 dB, and an operating temperature range of -40°C to +125°C. It utilizes a TSSOP-14 package.

Digital Potentiometers Feature Summary

• High-Voltage Analog Support: Operates with terminal voltage ranges up to +36V or ±18V relative to DGND.
• I2C Serial Interface: Supports standard modes including 100 kHz, 400 kHz, 1.7 MHz, and 3.4 MHz.
• 7-Bit Resolution: Provides 128 discrete taps for precise resistance adjustment.
• Extended Temperature Range: Designed for industrial applications with operation from -40°C to +125°C.

Digital Potentiometers Applications

• Industrial control systems requiring high-voltage signal attenuation
• Power management circuits with isolated analog domains
• Test and measurement equipment needing programmable gain or impedance

Digital Potentiometers Procurement Notes

Verify the specific suffix 'T' indicates tape and reel packaging when ordering. Confirm the '503' code corresponds to the 50 kΩ resistance value required for the design. Ensure the I2C address pins (A0, A1) are configured correctly on the PCB layout to avoid bus conflicts.

Digital Potentiometers Selection Notes

Select this component if a single-channel digital potentiometer with high-voltage tolerance is required. The 7-bit resolution provides 128 steps, which may be insufficient for applications demanding higher precision compared to the 8-bit MCP45HV51 variant. Verify that the 50 kΩ nominal resistance aligns with the circuit's current and power dissipation limits.

Digital Potentiometers Part Context

This part belongs to the MCP45HVX1 family, which includes variants with different resolutions (7-bit vs 8-bit), interfaces (I2C vs SPI), and channel counts. The 'T' in the model number denotes the reel packaging format, while '/ST' specifies the TSSOP-14 package type.

Digital Potentiometers Replacement Considerations

The MCP45HV51T-503E/ST is a direct pin-compatible replacement offering 8-bit resolution (256 taps). Other family members like the MCP41HV31 use an SPI interface and require software adaptation.