30521, 8-bit Microcontroller Unit MCU, SMD Package Type

The 30521-SMD IC is most likely a microcontroller unit (MCU) from the legacy Motorola/Freescale family, typically used in embedded applications. These microcontrollers feature onboard program memory, RAM, I/O lines, and peripheral interfaces for standalone operation in automotive control, industrial automation, or consumer electronics.

Key Features:

• Likely 8-bit architecture (based on common 305xx MCU markings)
• Embedded ROM/EPROM with internal RAM
• Integrated timers and serial interface
• On-chip watchdog and I/O ports
• SMD package ideal for compact systems
• Common in automotive and embedded control systems

Additional Specifications:

• Package Type: SOP-28
• Clock Frequency: 8 MHz
• Supply Voltage: 4.5V – 5.5V
• RAM: 512 Bytes
• ROM: 8 KB