• Device Type: Programmable Timer/Counter IC
• Compatible With: Intel 8254 / 82C54 architecture
• Package: PDIP-24 (Plastic Dual In-Line Package)

General Features

• CMOS implementation of the industry-standard 8254 timer
• Three independent 16-bit programmable counters
• Binary or BCD counting modes
• Software programmable operation
• Low-power CMOS technology
• Designed for microprocessor-based systems

Counter Configuration

• Number of Counters: 3
• Counter Width: 16 bits each
• Counter Modes: 6 programmable modes
  • Interrupt on Terminal Count
  • Programmable One-Shot
  • Rate Generator
  • Square Wave Generator
  • Software Triggered Strobe
  • Hardware Triggered Strobe
• Counting Format:
  • Binary (16-bit)
  • BCD (4-decade)

CPU Interface

• Compatible with:
  • Intel 8080/8085
  • Intel 8086/8088
  • Z80
  • 6800-family systems
  • Other 8-bit and 16-bit microprocessors
• Data Bus: 8-bit bidirectional
• Address Inputs: A0, A1
• Control Signals:
  • CS (Chip Select)
  • RD (Read)
  • WR (Write)

Timing Characteristics

• Speed Grade: -6
• Maximum Clock Frequency: 6 MHz
• Clock Inputs: CLK0, CLK1, CLK2
• Gate Inputs: GATE0, GATE1, GATE2
• Outputs: OUT0, OUT1, OUT2

Electrical Characteristics

• Operating Voltage: 4.5 V to 5.5 V
• Nominal Supply Voltage: 5 V
• CMOS Low-Power Operation
• TTL Compatible Inputs and Outputs

Package Information

• Package Type: Plastic DIP
• Pin Count: 24 Pins
• Mounting Style: Through-Hole

Operating Temperature

• Commercial Range: -20°C to +75°C

Typical Applications

• Real-time clocks
• Event counting
• Frequency measurement
• Programmable delays
• Industrial controllers
• Embedded systems
• Communication equipment
• Test and measurement instruments
• Personal computers and SBCs