AN2135SC

Overview

The AN2135SC is a ROMless USB microcontroller from the EZ-USB family, manufactured by Infineon Technologies. It integrates an enhanced 8051 core with a dedicated USB interface controller. The device features 8 KB of internal RAM and supports up to 24 MHz operation. It provides eight general-purpose I/O lines and includes integrated I2C and USB interfaces. Designed for surface-mount applications, it utilizes a 44-pin QFP package and operates within a supply voltage range of 3V to 3.6V.

Feature Summary

• Integrated 8051 CPU core with EZ-USB enhancements
• Built-in USB 2.0 compliant controller supporting Bulk, Interrupt, Isochronous, and Control transfers
• 8 KB x 8 SRAM for data storage
• On-chip I2C controller for serial communication

Applications

• USB peripheral devices requiring custom firmware
• Data acquisition systems interfacing via USB
• Industrial control modules utilizing I2C sensors

Procurement Notes

Verify component authenticity through authorized distributors. Confirm RoHS compliance status as indicated in official documentation. Check manufacturing date codes against shelf-life requirements. Ensure the 44-QFP package matches design specifications. Validate that the ROMless nature aligns with external memory or firmware loading strategies.

Selection Notes

Select this part when a flexible USB solution without onboard program memory is required. The 8 KB RAM must accommodate all runtime variables and buffers. Verify that the host system can support the enumeration process for ROMless devices. Consider the 44-pin footprint constraints during PCB layout. Ensure the operating temperature range meets environmental conditions.

Part Context

This component belongs to the EZ-USB product line, originally developed by Cypress Semiconductor Corporation before its acquisition by Infineon Technologies. The AN2135 variant specifically denotes the 44-pin package configuration with 8 KB RAM. It serves as a foundational chip for developing custom USB peripherals where code flexibility is prioritized over onboard storage.

Replacement Considerations

Consult official replacement lists for discontinued components. Verify pin compatibility and electrical characteristics if substituting with other EZ-USB variants.