COM78C804LJP

Overview

The COM78C804LJP is a CRC generator circuit manufactured by SMSC, utilizing MOS technology. It is housed in a ceramic DIP20 package with an in-line rectangular form factor and contains 20 terminals. The component operates within a commercial temperature range, with a maximum operating temperature of 70 °C. It is not surface mountable and does not hold RoHS certification. The device is identified by the JESD-30 code R-XDIP-T20 and JESD-609 code e0. Its logic integrated circuit type is specifically designated as a CRC generator circuit.

Feature Summary

• Implements cyclic redundancy check generation using MOS logic technology
• Constructed with a ceramic body for durability in commercial environments
• Designed for through-hole mounting via a standard dual in-line package

Applications

• Data integrity verification in digital communication systems
• Error detection mechanisms in legacy industrial control interfaces
• Checksum calculation for data transmission protocols

Procurement Notes

Verify the specific suffix LJP against official SMSC documentation to confirm pinout compatibility and material composition. Ensure the ceramic DIP20 package matches the target PCB footprint. Confirm that the commercial temperature rating aligns with the operational environment requirements before integration into the design.

Selection Notes

Select this component when a dedicated hardware-based CRC generator is required for MOS logic families. The DIP20 package is suitable for prototyping or applications requiring through-hole assembly. Consider the 70 °C maximum operating temperature limit when designing for high-heat environments. Verify availability of ceramic packages if lead-free compliance is not strictly mandated by the end-use regulation.

Part Context

This part belongs to the COM series of logic circuits produced by SMSC. The series typically includes various logic functions implemented in MOS technology. The COM78C804LJP specifically addresses cyclic redundancy check generation needs within this portfolio, offering a specialized solution distinct from general-purpose logic gates or microcontrollers.

Replacement Considerations

Cross-reference with other SMSC COM series CRC generators. Verify pin-to-pin compatibility with alternative DIP20 CRC chips from different manufacturers if sourcing constraints exist. Ensure voltage levels and logic families match the existing system design.