NS7520B-1-I55

Application Specific Microcontrollers Overview

The Digi NS7520B-1-I55 is a 32-bit system-on-a-chip ASIC based on the ARM7TDMI core, designed for intelligent networked devices. It integrates a 10/100 Mbps Ethernet MAC, two independent serial ports (UART/SPI), and a 13-channel DMA controller. The device operates at a maximum frequency of 55 MHz with a 1.5 V core voltage and 3.3 V I/O voltage. Packaged in a 177-pin LFBGA, it supports external memory interfaces including Flash, SDRAM, and EEPROM.

Application Specific Microcontrollers Feature Summary

• ARM7TDMI 32-bit RISC processor core
• Integrated 10/100 BaseT Ethernet MAC with MII interface
• Two independent serial ports supporting UART or SPI modes
• 13-channel DMA controller with dedicated channels for Ethernet and serial

Application Specific Microcontrollers Applications

• Intelligent networked devices
• Internet appliances
• Embedded networking solutions using NET+Works platform

Application Specific Microcontrollers Procurement Notes

Verify the suffix 'I' indicates industrial temperature range specifications (-40°C to +85°C) as per standard Digi naming conventions. Confirm package type is LFBGA-177. Ensure design accounts for 1.5V core and 3.3V I/O power domains. Check for moisture sensitivity requirements during assembly.

Application Specific Microcontrollers Selection Notes

Select this model for applications requiring a 55 MHz ARM7TDMI core with integrated Ethernet connectivity. Compare with NS7520B-1-C55 for commercial temperature range (0°C to +70°C) if industrial rating is not required. Ensure external memory support matches Flash, SDRAM, or EEPROM needs via the glueless memory controller.

Application Specific Microcontrollers Part Context

The NS7520B-1-I55 belongs to the NET+ARM family from Digi International. It serves as the hardware foundation for the NET+Works software suite, providing drivers and operating system support for device networking. The 'I' suffix typically denotes an extended industrial temperature grade compared to the 'C' commercial grade variants.

Application Specific Microcontrollers Replacement Considerations

NS7520B-1-C55 offers identical functionality but with a commercial temperature range (0°C to +70°C). NS7520B-1-I46 and NS7520B-1-C36 are available with lower maximum operating frequencies (46 MHz and 36 MHz respectively) while maintaining the same pinout and feature set.