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ID8155H-2 from INTEL

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ID8155H-2

Manufacturer: INTEL

2048-Bit Static MOS RAM with I/O Ports and Timer
Partnumber Manufacturer Quantity Availability
ID8155H-2,ID8155H2 INTEL 5704 In Stock

Description and Introduction

2048-Bit Static MOS RAM with I/O Ports and Timer **Part ID: 8155H-2**  
**Manufacturer: Intel**  

### **Specifications:**  
- **Type:** Microprocessor  
- **Architecture:** 8-bit  
- **Clock Speed:** 3 MHz  
- **Instruction Set:** 8085-compatible  
- **Package Type:** 40-pin DIP (Dual In-line Package)  
- **Operating Voltage:** 5V  
- **On-Chip Peripherals:**  
  - Timer/Counter  
  - Parallel I/O Ports  
  - Serial I/O Port  

### **Descriptions:**  
The **Intel 8155H-2** is an 8-bit microprocessor peripheral designed to complement the Intel 8085 CPU. It integrates RAM, I/O ports, and a timer in a single chip, reducing the need for additional components in embedded systems.  

### **Features:**  
- **256 x 8-bit Static RAM** for data storage  
- **Three Programmable I/O Ports** (Port A, Port B, Port C)  
- **14-bit Programmable Timer/Counter**  
- **Compatible with Intel 8085 and 8088 Microprocessors**  
- **Low Power Consumption**  
- **Wide Operating Temperature Range**  

This part is commonly used in industrial control, instrumentation, and early computing applications.

Application Scenarios & Design Considerations

2048-Bit Static MOS RAM with I/O Ports and Timer

Alternative Part Number

  • P8255A-5 --: The 8255A is a widely available general-purpose programmable peripheral interface that is functionally similar to the 8155's I/O ports and is a common substitute in many legacy designs.
  • 82C55A --: CMOS version of the 8255 PPI with lower power consumption, offering comparable parallel I/O functionality and often used where the 8155's I/O capability is needed.
  • MC6821P --: Peripheral Interface Adapter providing two 8-bit I/O ports with handshake control, a viable alternative for designs needing general-purpose parallel I/O in place of the 8155.

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