AM9517A-5JCTR

Overview

The AM9517A-5JCTR is a Direct Memory Access (DMA) controller manufactured by Advanced Micro Devices using MOS technology. It is housed in a surface-mount SOIC-28 package, identified by the 'CTR' suffix indicating tape and reel packaging. The device operates on a nominal 5 V power supply and supports a maximum clock frequency of 5 MHz. It features a commercial temperature rating with an operating range from 0 °C to 70 °C. The component utilizes a dual-in-line compatible pinout adapted for surface mount applications, providing standard DMA control signals for interfacing with system buses.

Feature Summary

• Provides hardware-managed data transfer between memory and I/O devices without continuous CPU intervention
• Supports multiple transfer modes including byte, word, and block transfers with auto-initialization capabilities
• Features independent request and acknowledge lines for reliable handshaking with peripheral devices

Applications

• Data acquisition systems requiring high-speed buffer management
• Industrial control interfaces utilizing serial or parallel communication protocols
• Legacy computer architecture expansion boards requiring DMA support

Procurement Notes

Verify the specific suffix 'CTR' confirms the surface-mount tape-and-reel configuration distinct from through-hole variants. Confirm the '-5' speed grade corresponds to the 5 MHz operational limit required by the target system bus timing. Ensure compatibility with 5 V logic levels and check for RoHS compliance status as original AMD manufacturing records may vary regarding modern environmental certifications.

Selection Notes

Select this component when a surface-mount DMA controller is required for 5 V systems with moderate speed demands up to 5 MHz. Compare against the AM9517A-5JC if through-hole mounting is preferred instead of SMD. Verify that the 28-pin SOIC footprint fits the PCB layout constraints. Consider the AM9517A-4JC if a lower speed grade is sufficient for the application to potentially reduce cost or power consumption.

Part Context

The AM9517A series represents a generation of dedicated DMA controllers widely used in 16-bit microcomputer architectures during the 1980s and 1990s. The AM9517A specifically offers enhanced functionality over earlier iterations, including improved block transfer handling. The AM9517A-5JCTR is a specific surface-mount variant within this family, designed for automated assembly processes while maintaining electrical compatibility with the broader AM9517A product line.

Replacement Considerations

Publicly confirmed direct substitute part numbers are not available in the provided source material. Engineering evaluation of functional equivalents from other manufacturers requires detailed verification of pinouts, timing parameters, and control signal definitions.