CY7B952-SXC

Overview

The CY7B952-SXC is a SONET/SDH Serial Transceiver compliant with OC-3 Bellcore and CCITT specifications. It operates at two frequency ranges: 155.52 MHz (STS-3/STM-1) when MODE is HIGH, and 51.84 MHz (STS-1) when MODE is LOW. The device recovers clock and data from differential PECL inputs (RIN±) using an internal PLL, outputting recovered serial data (RSER±) and clock (RCLK±). It features a transmit path that buffers differential input data (TSER±) to differential outputs (TOUT±) and synthesizes a transmit clock (TCLK±) by multiplying the REFCLK input by eight. Powered by a single +5 V supply, it draws less than 70 mA and supports power-down modes for individual sections.

Feature Summary

• Compliant with OC-3 jitter generation, transfer, and tolerance specifications
• Recovers clock and data from 51.84-MHz or 155.52-MHz NRZ/NRZI streams
• Synthesizes transmit clock via frequency multiplier PLL
• Includes link fault indication and loop-back testing capabilities

Applications

• WAN SONET/SDH physical layer protocol engines
• ATM system clock and data recovery
• SONET/SDH switch overhead processing

Procurement Notes

Verify component authenticity through authorized Infineon distributors or certified partners. Confirm the specific ordering suffix matches the required package type and tape/reel configuration. Review the official datasheet for current status, as this model may be subject to end-of-life notifications or obsolescence warnings.

Selection Notes

Select the CY7B952-SXC for applications requiring OC-3 compliance and single-supply operation. Ensure the reference clock source meets the ±1% frequency accuracy requirement. Verify that the MODE pin configuration aligns with the target STS-1 or STS-3 line rate. Check external filter component values for the FC pins to ensure proper PLL damping.

Part Context

This component belongs to the SST™ family of SONET/SDH transceivers originally developed by Cypress Semiconductor. The product line was integrated into Infineon Technologies' portfolio following the acquisition of Cypress. These devices are designed for high-speed telecommunications infrastructure supporting synchronous optical networking standards.

Replacement Considerations

Publicly confirmed substitute part numbers are not available in the provided documentation.