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Product attributes Property Value
Manufacturer Harris Corporation
Product Series
Packaging Bulk |
Type Clock Generator
PLL No
Input TTL, Crystal
Output CMOS, TTL
Number of Circuits 1
Ratio - Input:Output 1:3
Differential - Input:Output No/No
Frequency - Max 25MHz
Divider/Multiplier Yes/No
Voltage - Supply 4.5V ~ 5.5V
Operating Temperature 0°C ~ 70°C (TA)
Grade -
Qualification -
Mounting Type Through Hole
Package / Case 24-DIP (0.300", 7.62mm)
Supplier Device Package 24-CERDIP

The CD82C85 is a straightforward clock generator from Harris Corporation, designed for microprocessor systems. Without a PLL, it generates clocks up to 25MHz from TTL or crystal inputs, providing CMOS and TTL outputs. With 1 circuit and a 24-DIP package, it is ideal for legacy and educational applications requiring simple, reliable timing.

  • Simple Design: No PLL complexity, ideal for basic clock generation.
  • Dual Output Logic: Provides both CMOS and TTL outputs for broad compatibility.
  • Through-Hole Package: 24-DIP is easy to handle and solder.
  • Cost-Effective: Suitable for budget-sensitive projects.

Microprocessor Clock Generation

Provide system clocks for 8085/8086-based embedded systems. The TTL/crystal input and CMOS/TTL outputs ensure compatibility with legacy processors.

Industrial Control Systems

Generate timing for PLCs and industrial computers. The 25MHz frequency is sufficient for control logic and peripheral interfaces.

Educational and Hobbyist Projects

Use in retro computing projects and breadboard designs. The DIP package is easy to prototype and solder.

Legacy System Maintenance

Replace obsolete clock generators in existing equipment. The 0°C to 70°C range suits indoor environments.

Simple Digital Timing

Create basic clock signals for logic circuits. The lack of PLL simplifies design for low-cost applications.

Q: What type of device is the CD82C85?
A: It is a Clock Generator from Harris Corporation, designed for microprocessor systems.
Q: Does it have a PLL?
A: No, it does not include a PLL; it generates clocks directly from a crystal or TTL input.
Q: What input types are supported?
A: It accepts TTL or Crystal inputs for clock generation.
Q: What output types are available?
A: It provides CMOS and TTL outputs, compatible with various logic families.
Q: How many circuits does it have?
A: It contains 1 circuit.
Q: What is the maximum frequency and package?
A: It supports up to 25MHz and comes in a 24-DIP package, operating from 0°C to 70°C.
Base Product Number : CD82C85
24-DIP 25MHz Clock Generator CMOS Harris Microprocessor Clock No PLL TTL
Q: What type of device is the CD82C85?
A: It is a Clock Generator from Harris Corporation, designed for microprocessor systems.
Q: Does it have a PLL?
A: No, it does not include a PLL; it generates clocks directly from a crystal or TTL input.
Q: What input types are supported?
A: It accepts TTL or Crystal inputs for clock generation.
Q: What output types are available?
A: It provides CMOS and TTL outputs, compatible with various logic families.
Q: How many circuits does it have?
A: It contains 1 circuit.
Q: What is the maximum frequency and package?
A: It supports up to 25MHz and comes in a 24-DIP package, operating from 0°C to 70°C.