CY7B991-5JI

Overview

The CY7B991-5JI is a low-voltage programmable skew clock buffer manufactured by Cypress Semiconductor Corp. It operates within a supply voltage range of 4.5V to 5.5V and supports a maximum frequency of 80 MHz. The device features an 8:8 input-to-output ratio with differential TTL inputs and outputs, including 3-state capability. Packaged in a 32-LCC (J-Lead) surface-mount case, it functions as a zero-delay buffer within the RoboClock series. The component is rated for operation across an extended temperature range from -40°C to +85°C.

Feature Summary

• Zero-delay programmable PLL clock buffer architecture
• Differential TTL input and output interfaces
• 8:8 fanout ratio with 3-state control
• Extended industrial temperature range (-40°C to +85°C)

Applications

• High-performance system clock distribution
• Programmable skew adjustment in digital circuits
• Zero-delay buffering for synchronous logic

Procurement Notes

Verify the specific ordering suffix against official documentation to confirm package type and temperature grade. Confirm RoHS compliance status and lifecycle stage prior to procurement, as availability may vary.

Selection Notes

Select this component when differential clock distribution with programmable skew is required. Ensure the design accommodates the 4.5V to 5.5V supply range and the 32-LCC footprint. Verify that the 80 MHz maximum frequency meets system timing requirements.

Part Context

This part belongs to the RoboClock series of clock buffers. It serves as a solution for precise clock management in systems requiring low jitter and configurable delay characteristics.

Replacement Considerations

Check for direct pin-compatible substitutes within the same family or updated generations from Infineon Technologies, which acquired Cypress. Verify electrical parameters match exactly before substitution.