STMPE1801BJR

Overview

The STMPE1801BJR is an enhanced port expander with keypad controller from STMicroelectronics. It features 18-bit resolution and 18 general-purpose I/O lines via an I2C interface. Operating voltage ranges from 1.65V to 3.6V, with a maximum clock frequency of 400kHz. The device supports surface mount installation in a CSP-25 package. It operates within a temperature range of -40°C to +85°C and draws 28µA during operation.

Feature Summary

• Integrated keypad controller functionality for touch screen applications
• Enhanced port expansion capability with 18 configurable GPIO lines
• Supports standard I2C communication protocol at up to 400kHz

Applications

• Touchscreen controller systems
• Keypad input interfaces
• General purpose I/O expansion in embedded devices

Procurement Notes

Verify current lifecycle status directly with the manufacturer as availability information may be incomplete. Confirm RoHS compliance details prior to ordering. Ensure supply chain partners provide valid traceability documentation. Check for any specific handling requirements related to the FlipChip package type during storage and assembly processes.

Selection Notes

Select this component when an I2C-based solution is required for expanding GPIO capacity in low-power mobile or embedded designs. The integrated keypad controller simplifies interface design for touch inputs. Consider the 1.65V to 3.6V operating range compatibility with system power rails. Evaluate the CSP-25 package constraints against PCB layout space limitations.

Part Context

This part belongs to the STMPE series of port expanders designed by STMicroelectronics. It serves as a specialized peripheral for managing input/output needs in compact electronic systems. The device integrates logic functions typically requiring separate components, reducing bill of materials complexity for touchscreen and keypad applications.

Replacement Considerations

Consult official substitution lists for compatible alternatives within the STMPE family. Verify pinout and functional equivalence before replacing. No direct public substitute part numbers are confirmed in available documentation.