MCP4018T-104E/LTY

Overview

The MCP4018T-104E/LTY is a single-channel, 7-bit volatile digital potentiometer manufactured by Microchip Technology. It features an I2C serial interface and operates within a supply voltage range of 1.8V to 5.5V. The device provides 128 tap positions with a nominal end-to-end resistance (RAB) of 100 kΩ. Key electrical characteristics include a typical wiper resistance of 100 Ω, a bandwidth of 100 kHz at full scale, and low power consumption with a static current of 2.5 µA. It supports standard and fast-mode I2C protocols up to 400 kHz.

Feature Summary

• 7-bit resolution providing 128 discrete tap positions for precise resistance adjustment.
• I2C serial interface supporting Standard Mode (100 kHz) and Fast Mode (400 kHz).
• Wide operating voltage range from 1.8V to 5.5V with Brown-out Reset protection.
• Low-power operation with typical static current of 2.5 µA in standby mode.

Applications

• Programmable gain amplifiers requiring digital control.
• Voltage reference trimming and calibration circuits.
• Audio volume control and tone adjustment systems.
• Sensor bias voltage adjustment and signal conditioning.

Procurement Notes

Verify the specific suffix 'LTY' against official Microchip documentation to confirm packaging details such as tape and reel specifications. Ensure compatibility with the target PCB footprint for the SC70-6 package. Confirm that the volatile memory type aligns with system requirements, as wiper settings are lost upon power loss.

Selection Notes

Select this component when a single-channel digital potentiometer with I2C control is required. The 100 kΩ resistance value suits applications needing higher impedance networks. Consider the volatile memory characteristic; if non-volatile storage is needed, alternative models like the MCP4013 or MCP4023 should be evaluated. Ensure the I2C bus speed does not exceed 400 kHz for reliable operation.

Part Context

This part belongs to the MCP4017/18/19 family of 7-bit digital potentiometers. The MCP4018 variant specifically offers a potentiometer configuration, distinguishing it from the rheostat-only MCP4017 and MCP4019. All devices in this series share similar electrical characteristics and pinouts, differing primarily in terminal availability and internal connections.

Replacement Considerations

Direct functional equivalents within the same family include MCP4018T-103E/LTY (50 kΩ) and MCP4018T-502E/LTY (5 kΩ). For rheostat configurations, MCP4017T-104E/LTY is available. Non-volatile alternatives in the broader portfolio include the MCP4023 series.