Description

The 81C55-5 is a programmable universal timer designed for use in microcomputer systems. It is based on silicon gate CMOS technology, which allows for high speed and low power consumption. The timer features three independent 16-bit down counters and can count up to a maximum frequency of 8 MHz. It operates in a completely static manner and has a wide operating voltage range of 3V to 6V. The 81C55-5 has six different counter modes and supports both binary and decimal counting. It is available in three different package options: 24-pin Plastic DIP (Product name: MSM82C53-2RS), 28-pin Plastic QFJ (Product name: MSM82C53-2JS), and 32-pin Plastic SSOP (Product name: MSM82C53-2GS-K).

Specifications and features

• Maximum operating frequency: 8 MHz (MSM82C53-2)
• High speed and low power consumption achieved through silicon gate CMOS technology
• Completely static operation
• Three independent 16-bit down-counters
• 3V to 6V single power supply
• Six counter modes available for each counter
• Binary and decimal counting possible
• Packaging options:
  • 24-pin Plastic DIP (Product name: MSM82C53-2RS)
  • 28-pin Plastic QFJ (Product name: MSM82C53-2JS)
  • 32-pin Plastic SSOP (Product name: MSM82C53-2GS-K)

Application Scenarios

The 81C55-5 can be used in various microcomputer systems that require programmable timers. It is suitable for applications that need precise timing and counting capabilities, such as industrial automation, robotics, and embedded systems.

Comparison

• High-speed operation of up to 8 MHz
• Low power consumption
• Flexible counter modes
• Supports both binary and decimal counting

• Limited package options