The CY2304SXI-1T is a 3.3V zero-delay clock buffer from Infineon Technologies (formerly Cypress Semiconductor) featuring an on-chip PLL that locks to the input reference and provides four low-skew outputs. Operating from 10 MHz to 133 MHz, it delivers less than 250 ps input-output skew and less than 200 ps output-to-output skew in an 8-pin SOIC package with industrial temperature range.<\/p>\n
Product Overview The CY2304SXI-1T is a 3.3V zero-delay clock buffer from Infineon Technologies (formerly Cypress Semiconductor) featuring an on-chip PLL that locks to the input reference and provides four low-skew outputs. Operating from 10 MHz to 133 MHz, it delivers less than 250 ps input-output skew and less than 200 ps output-to-output skew in an […]<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[13],"tags":[],"chip_brand":[173],"class_list":["post-6486","post","type-post","status-publish","format-standard","hentry","category-integrated-circuits-ics","chip_brand-infineon"],"acf":{"brief_explanation":"3.3V zero-delay PLL clock buffer, 10-133MHz, 1:4 fanout, <250ps skew, SOIC-8, industrial temp","date_code":"","package_case":"SOIC-8 (150-mil)","in_stock":7860,"datasheet":"https:\/\/www.infineon.com\/dgdl\/Infineon-CY2304_DataSheet.pdf","price":"$2.58","product_introduction":"The CY2304SXI-1T from Infineon Technologies is a 3.3V zero-delay buffer designed for high-speed clock distribution in PC, workstation, datacom, and telecom applications. The on-chip phase-locked loop (PLL) locks to an input reference clock and generates four buffered outputs with guaranteed input-to-output skew below 250 ps and output-to-output skew below 200 ps. The feedback mechanism allows the user to adjust the input-output delay by varying the capacitive load on the FBK pin. In the CY2304-1 configuration, all outputs equal the reference frequency. The device enters power-down mode (< 25 \u00b5A) when no rising edges are detected on the REF input.","working_principle":"The CY2304SXI-1T uses a phase-locked loop (PLL) to achieve zero propagation delay between the reference input and the clock outputs. The REF pin receives the input clock, which drives the PLL's phase detector. The PLL feedback is taken from one of the outputs (via the FBK pin), creating a closed loop that aligns the output phase with the input. By adjusting the capacitive load on the feedback path relative to the other outputs, the user can fine-tune the input-output delay for precise timing alignment. The four outputs are organized as two banks (Bank A: CLKA1, CLKA2; Bank B: CLKB1, CLKB2), each with matched propagation delays for minimal output-to-output skew. When REF stops toggling, the PLL powers down and all outputs are three-stated.","pin_description":"
| Pin<\/th> | Name<\/th> | Function<\/th><\/tr> | ||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| 1<\/td> | REF<\/td> | Reference clock input (5V tolerant, weak pull-down)<\/td><\/tr> | ||||||||||||
| 2<\/td> | CLKA1<\/td> | Clock output, Bank A (weak pull-down)<\/td><\/tr> | ||||||||||||
| 3<\/td> | CLKA2<\/td> | Clock output, Bank A (weak pull-down)<\/td><\/tr> | ||||||||||||
| 4<\/td> | GND<\/td> | Ground<\/td><\/tr> | ||||||||||||
| 5<\/td> | CLKB1<\/td> | Clock output, Bank B (weak pull-down)<\/td><\/tr> | ||||||||||||
| 6<\/td> | CLKB2<\/td> | Clock output, Bank B (weak pull-down)<\/td><\/tr> | ||||||||||||
| 7<\/td> | VDD<\/td> | 3.3V power supply<\/td><\/tr> | ||||||||||||
| 8<\/td> | FBK<\/td> | PLL feedback input<\/td><\/tr><\/table>","application_scenarios":"The CY2304SXI-1T is used in high-performance computing platforms where precise clock distribution is critical for system timing margins. In PCI-X systems, it distributes a 66 MHz or 100 MHz clock to multiple card slots with guaranteed skew specifications. For networking equipment, it buffers reference clocks to multiple PHY devices and MAC controllers. The zero-delay feature is essential in synchronous digital systems where clock arrival time must be deterministic across all loads. Multiple CY2304 devices can share the same input clock with inter-device skew below 500 ps, enabling large clock trees.","alternative_models":"
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