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Product Detailed Parameters
- Description：ASYNCH COMMS INTERFACE ADAPTER
- Series：*
- Mfr：Renesas Electronics Corporation
- Package：Bulk
- Features：-
- Number of Channels：-
- FIFO's：-
- Protocol：-
- Data Rate (Max)：-
- Voltage - Supply：-
- With Auto Flow Control：-
- With IrDA Encoder/Decoder：-
- With False Start Bit Detection：-
- With Modem Control：-
- Mounting Type：-
- Package / Case：-
- Supplier Device Package：-
- Grade：-
- Qualification：-
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Overview
The HD63450RY8 is a Direct Memory Access (DMA) controller manufactured by Renesas Electronics Corporation, originally under the Hitachi brand. It operates with a maximum clock frequency of 8 MHz and utilizes CMOS technology. The device supports four independent DMA channels and features a 24-bit address bus width alongside a 16-bit external data bus. It is housed in a 64-pin Plastic Dual In-line Package (PDIP). The component is compatible with the Motorola 68000 bus architecture and supports various transfer modes including cycle steal with or without hold, burst, and auto-request transfers.
Feature Summary
- Supports multiple DMA transfer modes including cycle steal, burst, and auto-request operations.
- Provides fixed and rotational priority interrupt modes for flexible channel management.
- Ensures compatibility with standard 68000 bus architectures.
Applications
- Data transfer acceleration in systems utilizing 68000-based microprocessors.
- Peripheral-to-memory or memory-to-peripheral data movement in industrial control applications.
- High-speed I/O handling in legacy computing hardware requiring dedicated DMA resources.
Procurement Notes
Verify the specific suffix 'RY8' against official Renesas documentation to confirm package type and temperature range specifications. Confirm RoHS compliance status as historical Hitachi components may vary. Check for obsolescence notices or lifecycle status updates from the manufacturer before procurement planning.
Selection Notes
Select this component when interfacing with 68000-compatible buses requiring dedicated hardware DMA support. Ensure the system design accommodates the 8 MHz maximum operating frequency and 5 V supply voltage requirements. Verify that the 64-pin DIP footprint fits the target PCB layout constraints.
Part Context
This part belongs to the HD63450 series of DMA controllers, which are designed to offload data transfer tasks from the main CPU. The series is characterized by its compatibility with the 68000 family of processors and its ability to handle high-throughput data movements efficiently without CPU intervention.
Replacement Considerations
Consult official Renesas substitution guides for verified equivalent parts. Generic replacements must match the 68000 bus interface, 4-channel DMA capability, and PDIP-64 packaging. Verify pinout compatibility before implementation.
