MC908JB16DWE

Microcontrollers Overview

The MC908JB16DWE is an 8-bit microcontroller from the M68HC08 family, featuring a 6-MHz internal bus frequency. It integrates 16KB of on-chip FLASH memory and 384 bytes of RAM. The device includes a Universal Serial Bus (USB) module supporting low-speed functions at 1.5Mbps with an integrated 3.3V regulator. It provides up to 21 general-purpose I/O pins, two 16-bit Timer Interface Modules (TIM), and a Serial Communications Interface (SCI). The component operates within a voltage range of 4.0V to 5.5V.

Microcontrollers Feature Summary

• Integrates a USB 2.0 low-speed controller with an on-chip 3.3V regulator for direct host connectivity.
• Features upward-compatible object code with M6805 and M68HC05 families for legacy software support.
• Includes dual clock generator modules for flexible system clock configuration.
• Provides high-current drive capabilities on specific pins for infrared LED or PS/2 connections.

Microcontrollers Applications

• USB-enabled peripheral devices requiring low-speed data transfer
• Industrial control systems utilizing timer interface modules
• Legacy embedded applications compatible with M68HC05 instruction sets

Microcontrollers Procurement Notes

Verify the exact suffix 'DWE' against official NXP/Freescale documentation to confirm package type and temperature range. Confirm RoHS compliance status as manufacturing sources vary. Check for end-of-life notifications given the age of the HC08 architecture. Ensure programming tools support the specific BDM or USB-ICP interfaces required for this variant.

Microcontrollers Selection Notes

Select this component when a cost-effective 8-bit solution with native USB connectivity is required. It is suitable for designs needing backward compatibility with older Motorola codebases. Consider the limited pin count and memory size for complex applications. Evaluate the availability of development tools for the HC08 architecture before finalizing the design.

Microcontrollers Part Context

This part belongs to the M68HC08 family, a widely used 8-bit MCU line originally developed by Motorola and later Freescale Semiconductor. The JB series specifically targets applications requiring integrated communication peripherals like USB and SCI. The HC08 core offers a balance of performance and power efficiency for simple control tasks.

Microcontrollers Replacement Considerations

Direct replacements include other variants in the MC908JB16 series with different packages, such as MC908JB16ACJE or MC908JB16FA. Cross-family migration to HCS08 may require code adaptation despite architectural similarities. Verify pinout compatibility if substituting with different package options within the same functional group.