PSD834F2-90MI

Overview

The PSD834F2-90MI is a programmable peripheral IC manufactured by STMicroelectronics, housed in a 52-pin Plastic Quad Flat Package (PQFP). This device functions as a general-purpose Programmable Interface Adapter (PIA), providing flexible I/O expansion for embedded systems. It operates within a supply voltage range of 3.0 V to 3.6 V, with a rated voltage of 3.3 V. The component supports commercial temperature applications ranging from 0°C to 70°C and features 27 input/output pins. Note that this specific part number is listed as discontinued in public records.

Feature Summary

• Programmable Peripherals IC functioning as a General Purpose PIA
• 52-PQFP surface mount package (10x10 mm)
• 27 I/O ports with 3.0 V to 3.6 V operating voltage
• Commercial temperature grade (0°C to 70°C)

Applications

• 8-Bit MCU Peripheral Expansion
• General Purpose Interface Adaptation

Procurement Notes

This component is officially classified as discontinued by the manufacturer. Verification of availability should focus on surplus or secondary market sources rather than direct factory allocation. Buyers must confirm the authenticity of existing stock and check for potential obsolescence warnings before procurement planning.

Selection Notes

Designers requiring active alternatives should evaluate current STMicroelectronics programmable logic or GPIO expander families. The discontinuation status necessitates reviewing long-term supply chain stability. Ensure replacement components match the 52-pin PQFP footprint and 3.3 V logic levels if pin compatibility is required.

Part Context

The PSD834 series represents STMicroelectronics' legacy line of programmable peripherals designed to interface with 8-bit microcontrollers. These devices were utilized to expand system capabilities without consuming MCU resources. The PSD834F2 variant specifically offers configurable I/O mapping within the 52-pin form factor.

Replacement Considerations

Public documentation lists this part as discontinued. No specific official substitute part numbers are provided in the verified source material. Engineers should consult STMicroelectronics for current equivalent programmable peripheral solutions.