The 82C37A is an enhanced version of the industry standard 8237A Direct Memory Access (DMA) controller, fabricated using Intersil's advanced 2 micron CMOS process. Pin compatible with NMOS designs, the 82C37A offers increased functionality, improved performance, and dramatically reduced power consumption. The fully static design permits gated clock operation for even further reduction of power. The 82C37A controller can improve system performance by allowing external devices to transfer data directly to or from system memory. Memory-to-memory transfer capability is also provided, along with a memory block initialization feature. DMA requests may be generated by either hardware or software, and each channel is independently programmable with a variety of features for flexible operation. The 82C37A is designed to be used with an external address latch, such as the 82C82, to demultiplex the most significant 8-bits of address. The 82C37A can be used with industry standard microprocessors such as 80C286, 80286, 80C86, 80C88, 8086, 8088, 8085, Z80, NSC800, 80186 and others. Multimode programmability allows the user to select from three basic types of DMA services, and reconfiguration under program control is possible even with the clock to the controller stopped. Each channel has a full 64K address and word count range, and may be programmed to autoinitialize these registers following DMA termination (end of process).

Features

  • Compatible with the NMOS 8237A
  • Four Independent Maskable Channels with Autoinitialization Capability
  • Cascadable to any Number of Channels
  • High-Speed Data Transfers:
  • Up to 4MBytes/sec with 8MHz Clock
  • Up to 6.25MBytes/sec with 12.5MHz Clock
  • Memory-to-Memory Transfers
  • Static CMOS Design Permits Low Power Operation
  • ICCSB = 10µA Maximum
  • ICCOP = 2mA/MHz Maximum
  • Fully TTL/CMOS Compatible
  • Internal Registers may be Read from Software
  • Pb-Free Plus Anneal Available (RoHS Compliant)

Product Options

Orderable Part ID Part Status Pkg. Type Carrier Type MOQ Buy Sample
Active CERDIP Tube 45
Availability
Active CERDIP Tube 45
Availability

Documentation & Downloads

Title Other Languages Type Format File Size Date
Datasheets & Errata
82C37A Datasheet Datasheet PDF 1.14 MB
Application Notes & White Papers
AN9867: End of Life Derating: A Necessity or Overkill Application Note PDF 338 KB
PCNs & PDNs
PCN15064 - Qualification of Alternate Assembly Site for CERDIP (MMT) Product Change Notice PDF 323 KB
PCN14017 - Test Site Change for the Listed Intersil Products - Carsem (CAS) Ipoh, Malaysia Product Change Notice PDF 174 KB
PCN11039 - Manufacturing Site Change for Assembly of Intersil Ceramic Dual-In-Line (Frit Seal Cerdip) Products - Amkor (ATP) Muntinlupa City, Philippines Product Change Notice PDF 147 KB
PCN11040 - Manufacturing Site Change for Assembly of Intersil Ceramic Dual-In-Line (Frit Seal Cerdip) Products - Amkor (ATP) Muntinlupa City, Philippines Product Change Notice PDF 151 KB
Other
Intersil Space Products Brochure Brochure PDF 3.14 MB