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CY2304SXI-1T

3.3V zero-delay PLL clock buffer, 10-133MHz, 1:4 fanout, <250ps skew, SOIC-8, industrial temp

7860

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制造商零件：

CY2304SXI-1T

包装：

SOIC-8 (150-mil)

说明

产品概览

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.

主要规格

Supply Voltage: 3.0V ~ 3.6V (3.3V nominal)
Input Frequency Range: 10 MHz ~ 133 MHz
Output Configuration: 1:4 (2 banks of 2 outputs each)
Input-to-Output Skew: < 250 ps
Output-to-Output Skew: < 200 ps
Cycle-to-Cycle Jitter: 90 ps typical at 66 MHz, 15 pF
Inter-Device Skew: < 500 ps
Configuration: CY2304-1 (all outputs = reference frequency)
Power-Down Current: < 25 µA (no REF input)
Operating Temperature: -40°C ~ +85°C (I suffix)
Package: SOIC-8 (150-mil)
REF Input: 5V tolerant

特点

Zero input-output propagation delay (adjustable via FBK loading)
On-chip PLL with external feedback for skew control
Low-skew, low-jitter clock distribution
Multiple output bank configurations (CY2304-1 and -2)
Power-down mode when REF input is absent
5V tolerant reference input
Space-saving 8-pin SOIC package

应用

PC and workstation clock distribution
Data communication equipment
Telecom systems
High-performance digital logic
PCI-X clock buffering

产品介绍：CY2304SXI-1T 产品介绍

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 µA) when no rising edges are detected on the REF input.

工作原理：CY2304SXI-1T 工作原理

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.

引脚说明：CY2304SXI-1T 引脚定义和功能

针脚	名称	功能
1	REF	Reference clock input (5V tolerant, weak pull-down)
2	CLKA1	Clock output, Bank A (weak pull-down)
3	CLKA2	Clock output, Bank A (weak pull-down)
4	接地	地面
5	CLKB1	Clock output, Bank B (weak pull-down)
6	CLKB2	Clock output, Bank B (weak pull-down)
7	VDD	3.3V power supply
8	FBK	PLL feedback input

Application Scenarios:In which products and applications isCY2304SXI-1T 中古

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:What chips are recommended as replacements for CY2304SXI-1T

模型	制造商	主要区别
CY2304SXI-2T	英飞凌	Configurable output frequencies (1x, 2x, 0.5x)
CY2308SCI-1T	英飞凌	8-output version, 16-pin SOIC
PI49CTx02	二极管公司	Pin-compatible alternative

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