MIC2561-1BM-TR

Overview

The MIC2561-1BM-TR is a power distribution IC designed for PCMCIA card socket voltage switching. It manages three VCC outputs (OFF, 3.3V, 5.0V) and five VPP states (OFF, 0V, 3.3V, 5.0V, 12.0V). The device features a 3:2 N-channel configuration with a maximum output current of 200mA per channel. It operates in a 14-SOIC package and accepts logic-level inputs compatible with 3.3V CMOS. Key electrical characteristics include a typical Rds(on) of 550 mOhm and non-inverting input types.

Feature Summary

• Switches between multiple VCC and VPP voltage levels required by PCMCIA cards
• Accepts logic-level inputs compatible with 3.3V CMOS microcontrollers
• Includes status flag indication and current limiting fault protection

Applications

• PCMCIA card socket voltage management
• Power switching matrix for portable computing devices
• Embedded systems requiring multi-voltage card interface control

Procurement Notes

Verify the manufacturer designation, as sources may list Actel or Micrel due to historical acquisitions; Microchip Technology is the current owner. Confirm the suffix -TR indicates tape-and-reel packaging. Ensure RoHS compliance status matches specific procurement requirements. Cross-reference the 14-SOIC package type to avoid pinout mismatches during integration.

Selection Notes

Select this component when designing interfaces for legacy PCMCIA slots requiring precise VCC and VPP sequencing. The 200mA output capability suits standard card loads. Verify that the system logic levels align with the 3.3V CMOS compatibility requirement. Consider the 550 mOhm on-resistance for thermal management in dense PCB layouts.

Part Context

This part belongs to the MIC2561 family of PCMCIA Card Socket VCC & VPP Switching Matrices. Originally developed by Micrel Semiconductor and later acquired by Microchip Technology, these ICs simplify the complex voltage switching sequences mandated by PCMCIA standards. The series supports various package options and output configurations for different form factors.

Replacement Considerations

Public confirmed substitute part numbers are not available in the provided documentation. Users should consult official Microchip Technology resources for qualified alternatives or cross-reference lists.