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ID82C37A-5 from HARRIS,Intersil

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ID82C37A-5

Manufacturer: HARRIS

CMOS High Performance Programmable DMA Controller

Partnumber Manufacturer Quantity Availability
ID82C37A-5,ID82C37A5 HARRIS 227 In Stock

Description and Introduction

CMOS High Performance Programmable DMA Controller The **82C37A-5** is a **High-Performance Programmable DMA Controller** manufactured by **HARRIS**.  

### **Key Specifications:**  
- **Type:** CMOS DMA Controller  
- **Speed:** 5 MHz  
- **Operating Voltage:** 5V  
- **Technology:** CMOS  
- **Package:** 40-pin DIP (Dual In-line Package)  

### **Descriptions:**  
- Provides **four independent DMA channels** for data transfer between memory and I/O devices.  
- Supports **cascading mode** for expanding DMA channels.  
- Features **programmable priority schemes** (fixed or rotating).  
- Includes **auto-initialization** for repeated block transfers.  

### **Features:**  
- **High-speed data transfer** (up to 1.6 MB/s at 5 MHz).  
- **Memory-to-memory transfer capability**.  
- **Software compatibility** with the Intel 8237A.  
- **Low power consumption** (CMOS technology).  
- **On-chip address and count registers** for each channel.  

This device is commonly used in **PC/AT-compatible systems** and embedded applications requiring efficient DMA operations.

Application Scenarios & Design Considerations

CMOS High Performance Programmable DMA Controller

Alternative Part Number

  • 82C37A-5 --: Original Intel DMA controller design that Harris second-sourced; same 82C37A function and 5 MHz speed grade, pin-compatible replacement.
  • UPD71037D-5 --: NEC's 82C37A-compatible DMA controller with equivalent 5 MHz rating and pinout, widely used as a drop-in substitute.
  • Z80DMA --: Zilog DMA controller offering comparable DMA functionality for legacy bus systems, though pinout and register set differ so minor redesign may be needed.

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