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Product Detailed Parameters
- Description：IC MPU RABBIT 55MHZ 128LQFP
- Series：Rabbit®
- Mfr：Digi
- Package：Tray
- Core Processor：Rabbit 3000
- Number of Cores/Bus Width：1 Core, 8-Bit
- Speed：55MHz
- Co-Processors/DSP：-
- RAM Controllers：-
- Graphics Acceleration：No
- Display & Interface Controllers：-
- Ethernet：-
- SATA：-
- USB：-
- Voltage - I/O：3.3V
- Operating Temperature：-55°C ~ 85°C (TA)
- Security Features：-
- Mounting Type：Surface Mount
- Package / Case：128-LQFP
- Supplier Device Package：128-LQFP (14x14)
- Additional Interfaces：HDLC, IrDA, SDLC, SPI
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Overview
The Digi 20-668-0011 is a Rabbit 3000 microprocessor unit (MPU) manufactured by Digi. It features a single 8-bit core operating at a maximum speed of 55MHz. The device is housed in a 128-LQFP package with dimensions of 14x14 mm, designed for surface mount installation. It supports an I/O voltage of 3.3V and operates within a temperature range of -55°C to 85°C (TA). Additional interfaces include HDLC, IrDA, SDLC, and SPI.
Feature Summary
- Integrates the Rabbit 3000 processor architecture for embedded control applications
- Supports serial communication protocols including HDLC, IrDA, SDLC, and SPI
- Operates reliably across extended industrial temperature ranges
Applications
- Industrial automation systems requiring robust serial communication
- Embedded control units in harsh environmental conditions
- Legacy system maintenance and redevelopment projects
Procurement Notes
This component is officially listed as obsolete by the manufacturer. Verification of availability should focus on distributor surplus or secondary market sources rather than direct manufacturing supply. Confirm the specific revision level and packaging condition when sourcing from non-direct channels, as stock levels vary significantly across suppliers.
Selection Notes
Select this part only if compatibility with the Rabbit 3000 ecosystem and Dynamic C development environment is required. Consider the 128-LQFP footprint constraints during PCB layout. Evaluate alternative Rabbit series variants if higher clock speeds or different pin counts are needed, noting that this specific model represents a legacy configuration within the product family.
Part Context
The 20-668-0011 belongs to the Rabbit 3000 series of microprocessors produced by Digi International. This series was widely used in embedded applications prior to the industry shift toward ARM-based architectures. The part number specifically denotes the standard commercial/industrial grade version in the 128-pin LQFP package, distinct from lower-pin-count variants or extended temperature options.
Replacement Considerations
No official direct replacement part numbers are documented by Digi for this obsolete component. Engineers typically migrate to newer Rabbit 3000 derivatives or external ARM Cortex-M based solutions. Verify pin-to-pin compatibility if substituting with similar LQFP packages from other manufacturers.
