SIT9002AI-233N33DQ100.00000Y - 100MHz LVDS MEMS Oscillator | SiTime
料号： SIT9002AI-233N33DQ100.00000Y ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $7.17 | $7.17 |
| 10 | $6.45 | $64.50 |
| 100 | $5.74 | $574.00 |
| 500 | $4.92 | $2,460.00 |
| 1,000 | $4.1 | $4,100.00 |
SIT9002AI-233N33DQ100.00000Y 概述
A spread-spectrum oscillator (SSXO) is a programmable timing device that intentionally modulates its output frequency across a narrow band around the target frequency, typically by ±0.5% to ±2.0%. In the hierarchy of timing components, this places the SiT9002 family above standard crystal oscillators (XO) and below more advanced jitter-cleaner PLL devices; it belongs to the broader class of MEMS oscillators that replace legacy quartz resonators with silicon-based mechanical structures. Spread-spectrum modulation is most often used to suppress peak electromagnetic emissions in high-speed serial links.
Key features include support for four programmable differential output types (LVDS, LVPECL, HCSL, and CML), integrated 50-ohm near-termination on each output pin, and a pin-1 Select/Digital Enable function for power-gating. The device is built on SiTime's MEMS-first silicon-gate process, which delivers resilience against shock and vibration orders of magnitude better than quartz. Output rise/fall times are held below 1 ns to support 100 MHz LVDS links.
At the architecture level, the part combines a MEMS resonator, a fractional-N PLL multiplier, and an LVDS driver. Frequency is factory-programmed between 1 MHz and 220 MHz, while the spread profile is configurable in steps down to -0.25%. The internal PLL supports low multiplicative jitter, typically under 1 ps RMS over the 12 kHz to 20 MHz integration band relevant to PCIe, Ethernet, and SATA reference clocks.
Typical applications include PCI Express Gen 2/3 reference clocks, SATA and SAS storage interfaces, multi-gigabit Ethernet PHYs, FPGA fabric clocks in Spartan-6/Kintex-7 reference designs, and high-speed serial link retimers. The -1.0% down-spread profile reduces EMI peak amplitude by approximately 7-10 dB measured at the third harmonic, easing compliance with FCC and CE radiated emissions limits.
When designing with this device, place the four-layer stack-up with a continuous ground beneath the 5032 footprint and keep LVDS traces to 100-ohm differential impedance with length matching under 5 mil. Decouple VDD with a 0.1 µF ceramic capacitor placed within 2 mm of pin 4 to suppress PLL power-rail noise modulation. The pin-1 SD input also doubles as output enable; tie it high when unused.
This page synthesizes distributor pricing, drop-in alternatives, and practical design guidance not found in the manufacturer datasheet alone.
直接替换替代料： SIT9002AI-233N33DQ100.00000Y ——相同封装，引脚兼容。需要 PCB 改动的不同封装料号已排除。
快速对比工具——选择替代料号进行并排对比：
SIT9002AI-233N33DQ100.00000
✅ 直接替换📋 参考替代料（不在目录中）
SIT9002AI-233N33DQ100.00000X
✅ 直接替换📋 参考替代料（不在目录中）
SIT9002BI-233N33DQ100.00000Y
✅ 直接替换📋 参考替代料（不在目录中）
SIT9002AI-233N33DQ100.00000T
✅ 直接替换📋 参考替代料（不在目录中）
ECS-LVDS33-1000-BN
✅ 直接替换📋 参考替代料（不在目录中）
SIT9002AI-233N33DQ100.00000Y 规格参数
| Device Type | Spread Spectrum Oscillator (SSXO) |
| Frequency | 100.000000 MHz |
| Frequency Stability | ±50 ppm |
| 工作温度范围 | -40°C to +85°C |
| 输出类型 | LVDS (Differential) |
| 电源电压 | 3.3 V |
| Spread Spectrum Type | Center Spread, -1.0% |
| Package Size | 5.0 x 3.2 mm (5032 SMD) |
| 引脚数量 | 6 |
| 安装类型 | Surface Mount |
| Duty Cycle | 55% (typical 50%) |
| Output Drive Strength | Default (LVDS, 100-ohm differential) |
| Pin 1 Function | SD (Standby / Digital Enable) |
| RoHS 状态 | Compliant |
| MSL 等级 | MSL 1 |
| Resonator Technology | MEMS (Silicon) |
SIT9002AI-233N33DQ100.00000Y 引脚配置
| 引脚 1 | SD — Standby/Digital Enable (active high; tie high when unused) |
| 引脚 2 | NC/GND — No Connect or Ground per package variant |
| 引脚 3 | GND — Ground |
| 引脚 4 | VDD — Supply voltage input (3.3 V) |
| 引脚 5 | OUT+ — LVDS positive output |
| 引脚 6 | OUT- — LVDS negative output |
典型应用
SIT9002AI-233N33DQ100.00000Y 适用于 6 应用s: PCIe Gen 2/3 Reference Clock, SATA / SAS Storage Interface Clock, Multi-Gigabit Ethernet PHY Reference Clock, FPGA Fabric Clock Distribution, FPGA High-Speed Serial Link Reference Clock, Industrial Test & Measurement Chassis.
PCIe Gen 2/3 Reference Clock
The SiT9002 100 MHz LVDS output with ±50 ppm stability and -1.0% center-spread modulation provides an EMI-reduced reference clock for PCI Express Gen 2 and Gen 3 endpoints and root complexes. The center-spread modulation spreads the 100 MHz fundamental across a 1 MHz band, converting the sharp spectral peak into a broader lower-amplitude skirt. Per typical PCIe ref clock design patterns, this approach can reduce radiated peak emissions by 7-10 dB at the 100 MHz third harmonic (300 MHz) compared to a non-spread XO. The LVDS output stage supplies the standard 100-ohm differential drive, matching the PCIe base specification's 100 MHz ref clock requirement and eliminating the need for series termination resistors.
推荐
SATA / SAS Storage Interface Clock
The SiT9002 100 MHz LVDS differential output is a drop-in reference clock for SATA host bus adapters and SAS expanders. The internal MEMS resonator delivers ±50 ppm stability across the industrial -40°C to +85°C range, meeting SATA-Gen-3 speed-negotiation timing requirements. The -1.0% spread modulation remains transparent to SATA link training because the receiver PLL integrates well within the spread modulation bandwidth, while the spread benefit suppresses board-level harmonics that would otherwise require shielding cans. The 5032 6-pin SMD package directly substitutes for legacy 100 MHz quartz LVDS XOs in SATA backplane designs.
推荐
Multi-Gigabit Ethernet PHY Reference Clock
The SiT9002 100 MHz LVDS reference clock drives the reference input of multi-gigabit Ethernet PHYs, including 1G/2.5G/10G BASE-T and SGMII SerDes channels. The LVDS output stage drives a 100-ohm differential pair directly, with typical RMS jitter under 1 ps over the 12 kHz to 20 MHz integration band relevant to 1000BASE-T CDR loops. The -1.0% center-spread modulation is acceptable for Ethernet transceivers because the recovered-clock CDR bandwidth tracks the spread well; meanwhile, the spread skirts reduce the radiated 100 MHz clock fundamental, easing CE/FCC Class B compliance for office networking equipment.
推荐
FPGA Fabric Clock Distribution
The SiT9002 supplies the primary 100 MHz LVDS reference clock for FPGA fabric clock-input pins on Spartan-6, Kintex-7, Cyclone IV, and similar 28 nm FPGAs. The pin-1 SD (Standby/Digital-Enable) input lets the FPGA GPIO toggling toggle the oscillator on and off for sleep-power optimization. The integrated 100-ohm source termination on LVDS drivers eliminates external AC-coupling caps, simplifying the FPGA clock-input bias network. The MEMS-based architecture provides 500x better shock and vibration immunity than legacy quartz XOs, critical for industrial and transportation FPGA designs.
推荐
FPGA High-Speed Serial Link Reference Clock
The SiT9002 100 MHz LVDS clock provides the reference input for FPGA multi-gigabit transceivers (MGT/GTX/GTH) on Kintex-7 and Virtex-7, supporting protocols like CPRI, OBSAI, and serial RapidIO. The -1.0% center-spread modulation is acceptable because the transmitter PLL bandwidth tracks the modulation rate, and the spread reduces out-of-band emissions that otherwise require expensive board-level shielding. The LVDS-to-LVPECL translation can be achieved with a single capacitor/resistor network, allowing the SiT9002 to drive LVPECL inputs on legacy FPGA transceivers where 100 MHz LVDS reference is the system requirement.
推荐
Industrial Test & Measurement Chassis
The SiT9002 100 MHz LVDS reference clock drives ADC and DAC sample-rate generators in PXI, LXI, and modular test chassis. The MEMS architecture's 500x shock immunity versus quartz makes it ideal for equipment exposed to shipping handling and vibration in production-floor deployments. The -40°C to +85°C industrial temperature grade plus ±50 ppm stability ensures the 100 MHz fundamental stays within the tight tolerance of the downstream timing engine, while the -1.0% spread keeps EMI peak emissions below CISPR 11 / EN 55011 Class A limits without external shielding cans.
推荐
推荐产品汇总
工程参考数据： SIT9002AI-233N33DQ100.00000Y ——对比、设计指导和合规信息。
选型指南
与替代料对比
| 参数 | 本产品 | SIT9002AI-233N33DQ100.00000 | SIT9002AI-233N33DQ100.00000X | SIT9002BI-233N33DQ100.00000Y | SIT9002AI-233N33DQ100.00000T | ECS-LVDS33-1000-BN |
|---|---|---|---|---|---|---|
| Package | 5032 (6-pin SMD) | 5032 (6-pin SMD) - same | 5032 (6-pin SMD) - same | 5032 (6-pin SMD) - same | 5032 (6-pin SMD) - same | 5032 (6-pin SMD) - same |
| Brand | SiTime | SiTime | SiTime | SiTime | SiTime | ECS Inc. |
| Frequency | 100 MHz | 100 MHz | 100 MHz | 100 MHz | 100 MHz | 100 MHz |
| Output Type | LVDS | LVDS | LVDS | LVDS | LVDS | LVDS |
| Supply Voltage | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
| Spread Percentage | -1.0% center spread | -1.0% center spread | -1.0% center spread | -1.0% center spread | -1.0% center spread | 0% (no spread, standard XO) |
| Resonator Technology | MEMS | MEMS | MEMS | MEMS | MEMS | Quartz |
关键差异点
- MEMS resonator delivers 500x better shock/vibration immunity （对比 ECS-LVDS33-1000-BN)
- Industry-first programmable spread-spectrum differential oscillator （对比 ECS-LVDS33-1000-BN)
- Five carrier-format variants share one silicon die （对比 SIT9002AI-233N33DQ100.00000T)
设计说明
Route the LVDS output traces as a 100-ohm differential pair with length matching within 5 mil. Place the SiT9002 as close to the receiver IC as practical to minimize stub lengths; keep the OUT+ and OUT- traces symmetric, with no vias if possible. Provide a continuous ground reference plane on the layer immediately beneath the 5032 footprint, and avoid routing noisy digital signals (USB, switching regulator feedback) directly beneath the OUT traces to preserve LVDS common-mode noise margin.
Decouple the VDD pin (pin 4) with a 0.1 µF X5R/X7R ceramic capacitor placed within 2 mm of the pin. For chassis designs with extended temperature swings, add a 10 µF bulk capacitor on the same rail to suppress power-rail modulation coupling into the PLL. Power-supply rejection ratio (PSRR) of the SiT9002 PLL is approximately 30 dB at low frequency, so any VDD ripple above 100 kHz must be filtered to less than 10 mV to prevent the modulation sidebands from mixing into the output frequency.
Do not leave the SD (Standby/Digital Enable) pin floating. Tie it high through a 10 kΩ pull-up to VDD if the enable function is not used, otherwise the LVDS output may enter an indeterminate state during power-up, producing transient glitches on the reference clock that violate PCIe link-training timing margins. The exposed pad of the 5032 package must be soldered to the PCB ground pad to ensure proper thermal dissipation and mechanical shock performance; a missing solder connection degrades vibration tolerance by an order of magnitude versus the MEMS datasheet specification.
合规信息
RoHS compliant per SiTime product page and Arrow listing. Not AEC-Q100 qualified - choose AEC-Q100 qualified timing products for automotive designs.