CY7B991-7JXC

Overview

The CY7B991-7JXC is a zero-delay programmable PLL clock buffer from Infineon Technologies' RoboClock series. It operates on a single 5V supply with a voltage range of 4.5V to 5.5V and supports input frequencies between 3.75 MHz and 80 MHz. The device features an 8:8 output ratio, providing eight TTL-compatible outputs for one TTL input. Housed in a 32-PLCC surface-mount package, it functions within a commercial temperature range of 0°C to +70°C. Designed for low-jitter applications, this silicon-based circuit ensures precise clock distribution without propagation delay skew.

Feature Summary

• Zero-delay programmable PLL architecture for minimal jitter
• 8:8 fan-out ratio with TTL-compatible inputs and outputs
• Operates at maximum frequency of 80 MHz
• Single 5V power supply requirement (4.5V–5.5V)

Applications

• High-performance computer systems requiring precise clock synchronization
• Telecommunications equipment needing low-jitter signal distribution
• Industrial control systems utilizing TTL logic interfaces

Procurement Notes

Verify component authenticity through authorized distributors or direct manufacturer channels. Confirm RoHS compliance status via official documentation before integration. Check current lifecycle status as the part may be discontinued or subject to last-time buy restrictions. Ensure storage conditions account for moisture sensitivity levels specified in the datasheet.

Selection Notes

Select this component when an 8-channel TTL clock buffer with zero-delay characteristics is required. Ensure the system operates within the 0°C to +70°C temperature range. Verify that the input clock source falls within the 3.75 MHz to 80 MHz frequency window. Confirm compatibility with 5V logic levels and 32-PLCC footprint constraints.

Part Context

Part of the RoboClock family designed for high-speed clock generation and distribution. The CY7B991 series specifically addresses applications requiring programmable phase alignment and low jitter performance in digital systems.

Replacement Considerations

Consult official Infineon cross-reference guides for verified substitutes. Ensure replacement parts maintain identical 8:8 ratio, TTL I/O levels, and 32-PLCC packaging to preserve board layout integrity.