MCP4451T-502E/ST

Digital Potentiometers Overview

The MCP4451T-502E/ST is a quad digital potentiometer IC featuring four independent 8-bit resistor networks with 257 taps. It utilizes volatile RAM for wiper storage and communicates via an I2C serial interface supporting standard, fast, and high-speed modes up to 3.4 MHz. The device operates within a supply voltage range of 1.8V to 5.5V and offers high-voltage tolerant digital inputs up to 12.5V. It is housed in a TSSOP-14 surface-mount package and supports linear taper configurations with a typical wiper resistance of 75 ohms.

Digital Potentiometers Feature Summary

• Quad 8-bit resistor network with 257 taps and linear taper
• I2C serial interface with support for 100 kHz, 400 kHz, and 3.4 MHz speeds
• High-voltage tolerant digital inputs (HVC/A0) up to 12.5V
• Volatile memory with mid-scale power-on reset setting

Digital Potentiometers Applications

• Programmable gain amplifiers
• Voltage reference adjustment
• Audio volume control
• Sensor biasing and calibration

Digital Potentiometers Procurement Notes

Verify the 'T' suffix indicates tape and reel packaging when ordering. Confirm the '502' code corresponds to the 5 kOhm resistance value. Ensure the 'ST' suffix matches the required TSSOP-14 package type. Check for AEC-Q100 qualification if automotive compliance is needed, though this specific variant's qualification status should be verified against the latest datasheet revision.

Digital Potentiometers Selection Notes

Select this component for applications requiring four independently controllable resistors with high-resolution 8-bit adjustment. The volatile memory requires external retention of settings across power cycles. Ensure the system voltage falls within the 1.8V to 5.5V operating range. Consider the 75 ohm typical wiper resistance for low-impedance signal paths.

Digital Potentiometers Part Context

This part belongs to the MCP44X1 family of quad digital potentiometers. It shares architectural similarities with non-volatile variants like the MCP4461 but uses volatile RAM instead of EEPROM. The 'T' suffix denotes reel packaging, while 'ST' specifies the TSSOP-14 footprint. It complements single-channel parts like the MCP4551 and rheostat versions like the MCP4452.

Digital Potentiometers Replacement Considerations

Direct pin-compatible replacements include other MCP4451 variants with different resistance codes or packages. For non-volatile requirements, consider the MCP4461 series. Verify that substitute parts maintain the same 8-bit resolution and I2C address configuration.