SIT1602BI-11-30S-66.600000 - 66.6MHz MEMS XO 3V Standby | SiTime
料号： SIT1602BI-11-30S-66.600000 ✓ 量产中| 数量 | 单价 | 小计 |
|---|---|---|
| 1 | $1.35 | $1.35 |
| 10 | $1.22 | $12.20 |
| 100 | $1.05 | $105.00 |
| 500 | $0.89 | $445.00 |
| 1,000 | $0.74 | $740.00 |
SIT1602BI-11-30S-66.600000 概述
What is a MEMS oscillator? A MEMS (Micro-Electro-Mechanical Systems) oscillator is a solid-state timing device that replaces traditional quartz crystals with a silicon resonator and an integrated PLL/divider network. Compared to quartz XOs, MEMS XOs provide superior vibration tolerance, better aging characteristics, faster startup (typically 5 ms for the SiT1602 family), and better immunity to EMI. As a fixed-frequency device, the SIT1602B fits into the taxonomy: oscillator -> MEMS oscillator -> XO -> frequency control component -> passive/timing device.
Key features include ±20 ppm frequency stability over -40C to +85C, typical supply current of 3.5 mA at 1.8V, and a continuous 1.62V to 3.63V supply range that lets one device serve 1.8V, 2.5V, 2.8V, 3.0V, and 3.3V rails. The SiT1602B is a 100% pin-to-pin drop-in replacement for legacy quartz-based XOs in standard 4-pad SMD layouts, simplifying PCB redesign when migrating from crystal-based oscillators.
Architecture-wise, the SiTime MEMS oscillator uses a programmable silicon resonator plus an analog PLL to synthesize the target frequency. Internal LDOs and a temperature-compensation block maintain frequency accuracy over temperature. The Standby pin (S in the part number) drives the device to <10 uA current when held low, which is critical for handheld and IoT battery-powered designs.
Typical applications include IoT sensor nodes, wearables, portable medical devices, microcontroller clock inputs, and any compact embedded system where a 66.6 MHz reference is needed and PCB space is at a premium. The 2.5x2.0 mm footprint enables use in tight enclosures such as BLE wearables and small-form-factor industrial modules.
When designing with the SiT1602B, place a 0.1 uF decoupling capacitor as close as possible to the VDD pin and ensure the Standby pin is either driven logic-high (run) or logic-low (power down) — leaving it floating can cause undefined behavior. The output drive strength is suitable for short PCB traces; if you route the clock to multiple loads, consider buffering. The device does not need an external series resistor, unlike some quartz oscillator circuits.
This page synthesizes distributor pricing, drop-in alternatives within the SiT1602 family, and practical design notes not found in the manufacturer datasheet alone.
直接替换替代料： SIT1602BI-11-30S-66.600000 ——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：
SIT1602BI-11-30S-66.000000
✅ 直接替换📋 参考替代料（不在目录中）
SIT1602BI-11-30S-66.666000
✅ 直接替换📋 参考替代料（不在目录中）
SIT1602BI-11-30S-66.666600
✅ 直接替换📋 参考替代料（不在目录中）
SIT1602BI-11-30S-30.000000
✅ 直接替换📋 参考替代料（不在目录中）
SIT1602BI-11-30E-66.600000
✅ 直接替换📋 参考替代料（不在目录中）
SIT1602BI-11-30N-66.600000
✅ 直接替换📋 参考替代料（不在目录中）
SIT1602BI-11-30S-66.600000 规格参数
| Product Type | MEMS Oscillator (XO, Standard) |
| Frequency | 66.6 MHz |
| Output Format | HCMOS, LVCMOS |
| 电源电压 | 3.0 V (continuous 1.62 V to 3.63 V supported) |
| Frequency Stability | +/-20 ppm |
| 工作温度 | -40C to +85C |
| Supply Current (Typical, 1.8V) | 3.5 mA |
| Standby Function | Yes (Power Down, pin 1 = S option) |
| Startup Time | 5 ms typical |
| 封装 | 4-SMD, No Lead (2.5 x 2.0 mm) |
| 安装类型 | Surface Mount |
| 引脚数量 | 4 |
| Pin-to-Pin Quartz Replacement | Yes (100% drop-in) |
| RoHS 状态 | Compliant |
SIT1602BI-11-30S-66.600000 引脚配置
| 引脚 1 | STDBY — Standby (Power Down) - pull low for power-down mode; high or floating for normal operation (S option) |
| 引脚 2 | GND — Ground reference |
| 引脚 3 | OUT — 66.6 MHz HCMOS/LVCMOS clock output |
| 引脚 4 | VDD — Power supply (1.62 V to 3.63 V; 3.0 V nominal in this part number) |
典型应用
SIT1602BI-11-30S-66.600000 适用于 6 应用s: IoT Sensor Node Clock Source, Wearable and Portable Medical Devices, Industrial IoT and Sensor Modules, Microcontroller Reference Clock, Consumer Audio and Streaming Devices, Automotive Infotainment and Telematics.
IoT Sensor Node Clock Source
Provides a stable 66.6 MHz reference clock for low-power IoT sensor nodes and wireless modules. The SIT1602BI-11-30S-66.600000's 3.5 mA typical supply current and <10 uA standby current let battery-powered nodes sleep between sensor reads without draining the cell. Its wide 1.62-3.63 V supply range supports direct connection to single-cell Li-ion (3.0-4.2 V), 3.3 V LDO rails, or 1.8 V MCU I/O domains. The 2.5x2.0 mm SMD footprint fits inside miniature BLE/Zigbee/LoRa modules. Designers can place the SiT1602B as the main SoC clock and gate it via the Standby pin during deep-sleep cycles, cutting quiescent draw by 99% versus leaving a quartz oscillator running.
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Wearable and Portable Medical Devices
Drives the main processor clock in wearable health monitors (heart-rate, SpO2, glucose patches) and portable diagnostic tools. The SIT1602BI-11-30S-66.600000's +/-20 ppm frequency stability keeps BLE radio packet timing within spec, which is critical for medical-grade wireless reliability. Its fast 5 ms startup enables quick wake-from-standby response when a patient triggers a measurement, improving perceived device responsiveness. The Standby (S) variant directly supports sleep-current budgets under 1 mA for the entire clock subsystem. Compared with quartz XOs of the same frequency, MEMS tolerance to body-motion vibration and drop events significantly reduces field failure rates in wearable form factors.
推荐
Industrial IoT and Sensor Modules
Serves as the timing reference for industrial sensor modules (temperature, pressure, flow) connected to PLCs or wireless gateways. The SIT1602BI-11-30S-66.600000's -40C to +85C industrial temperature range and +/-20 ppm stability meet the requirements of factory-floor deployments. Its high immunity to vibration (typically 50x better than quartz per SiTime data) tolerates mounting near motors and pumps. The continuous 1.62-3.63 V supply lets the same oscillator SKU run from 24 V->5 V LDO rails or 3.3 V switching rails without requalification. The compact 2.5x2.0 mm package fits inside IP67 sensor heads alongside the MEMS sensor and front-end ASIC.
推荐
Microcontroller Reference Clock
Provides the external high-speed oscillator (HSE) reference for general-purpose MCUs that lack internal high-frequency oscillators. The SIT1602BI-11-30S-66.600000's 66.6 MHz HCMOS output drives MCU oscillator pins directly with a 1 ns-class rise time, matching the input thresholds of common Cortex-M0/M3/M4 parts. The +/-20 ppm stability is sufficient for UART baud-rate accuracy, USB full-speed operation, and most SPI/I2C peripherals. Designers moving from quartz crystals to MEMS benefit from faster 5 ms startup, eliminating long crystal warm-up delays in time-sensitive boot sequences. The 4-pad pinout matches industry-standard quartz footprints, allowing direct PCB swap without redesign.
推荐
Consumer Audio and Streaming Devices
Generates the master clock for audio DACs, ADCs, and Bluetooth audio SoCs in soundbars, headphones, and streaming speakers. The SIT1602BI-11-30S-66.600000's low-jitter HCMOS output maintains audio sample-rate accuracy (44.1/48 kHz multiples derived from 66.6 MHz via PLL dividers) within +/-20 ppm, preventing audible drift between video and audio streams. The 3.3 V supply compatibility and 4-pad SMD footprint fit inside slim consumer enclosures. Standby (S) control lets the audio subsystem power down completely when the device is in standby mode, cutting idle current. Compared with quartz XOs of the same frequency, MEMS XOs reduce BOM count by eliminating external load capacitors.
推荐
Automotive Infotainment and Telematics
Supplies the system clock for automotive infotainment head units, telematics control units (TCUs), and instrument-cluster MCUs. The SIT1602BI-11-30S-66.600000's +/-20 ppm stability and -40C to +85C industrial temperature range suit cabin-mounted automotive modules where AEC-Q100 is not mandatory. MEMS vibration tolerance is critical in vehicles where engine and road vibration can degrade quartz-based oscillator performance. The wide 1.62-3.63 V supply works with 3.3 V LDO rails and directly with point-of-load converters. For under-hood or AEC-Q100-mandated applications, SiTime refers designers to the SiT8920/SiT8918/SiT1618 automotive-grade families that share the same footprint.
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推荐产品汇总
工程参考数据： SIT1602BI-11-30S-66.600000 ——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 | SIT1602BI-11-30S-66.000000 | SIT1602BI-11-30S-66.666000 | SIT1602BI-11-30S-66.666600 | SIT1602BI-11-30S-30.000000 | SIT1602BI-11-30E-66.600000 | SIT1602BI-11-30N-66.600000 |
|---|---|---|---|---|---|---|---|
| Package | 4-SMD, No Lead (2.5x2.0 mm) | 4-SMD, No Lead (2.5x2.0 mm) - same | 4-SMD, No Lead (2.5x2.0 mm) - same | 4-SMD, No Lead (2.5x2.0 mm) - same | 4-SMD, No Lead (2.5x2.0 mm) - same | 4-SMD, No Lead (2.5x2.0 mm) - same | 4-SMD, No Lead (2.5x2.0 mm) - same |
| Brand | SiTime | SiTime | SiTime | SiTime | SiTime | SiTime | SiTime |
| Output Frequency | 66.6 MHz | 66.0 MHz | 66.666 MHz | 66.6666 MHz | 30.0 MHz | 66.6 MHz | 66.6 MHz |
| Supply Voltage (Family Wide) | 1.62 V to 3.63 V (3.0 V nom.) | 1.62 V to 3.63 V | 1.62 V to 3.63 V | 1.62 V to 3.63 V | 1.62 V to 3.63 V | 1.62 V to 3.63 V | 1.62 V to 3.63 V |
| Frequency Stability | +/-20 ppm | +/-20 ppm | +/-20 ppm | +/-20 ppm | +/-20 ppm | +/-20 ppm | +/-20 ppm |
| Operating Temperature | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C | -40C to +85C |
| Pin 1 Function | Standby (Power Down, active-low) | Standby (Power Down, active-low) | Standby (Power Down, active-low) | Standby (Power Down, active-low) | Standby (Power Down, active-low) | Enable/Disable (active-high) | No Connect |
| Output Format | HCMOS, LVCMOS | HCMOS, LVCMOS | HCMOS, LVCMOS | HCMOS, LVCMOS | HCMOS, LVCMOS | HCMOS, LVCMOS | HCMOS, LVCMOS |
关键差异点
- Wide 1.62 V to 3.63 V supply range covers 1.8V, 2.5V, 2.8V, 3.0V, and 3.3V rails with a single SKU （对比 Quartz XO at 66.6 MHz (typical fixed 3.3 V or 5 V supply))
- Standby (Power Down) mode with <10 uA current consumption （对比 SIT1602BI-11-30N-66.600000 (N suffix, No Connect on pin 1))
- MEMS-based construction with superior vibration tolerance （对比 Equivalent-frequency quartz XO in the same 2.5x2.0 mm footprint)
设计说明
Place a 0.1 uF X7R ceramic decoupling capacitor as close as possible to the VDD pin (pin 4) with the ground via right at the GND pin (pin 2). The SiT1602B family is designed to operate from 1.62 V to 3.63 V, but bypassing is still required because the internal PLL and output driver create sub-nanosecond supply current spikes that can couple into the clock output if not bypassed. For designs where VDD is shared with a noisy digital rail, add a small ferrite bead or 10 ohm resistor in series with VDD to isolate the oscillator from switching noise.
Route the OUT trace (pin 3) over a continuous ground plane and keep it short (<25 mm or 1 inch) to minimize reflections and EMI. Avoid routing the OUT trace parallel to high-current switching traces; if you must cross, do so at 90 degrees. The 4-pad SMD land pattern is industry-standard quartz-compatible, so if you are migrating from a quartz XO, you can usually drop in the SiT1602B without changing the footprint. Avoid placing the oscillator near strong magnetic fields (inductors, switching converters) to prevent jitter injection.
Do not leave the STDBY pin (pin 1) floating - drive it actively or tie it to VDD through a 100 kohm pull-up. Leaving it floating can cause the oscillator to intermittently enter power-down, leading to missing clocks and MCU lockups. Do not assume the SiT1602B is a drop-in for every 4-pad SMD oscillator: pin 1 function varies between S (Standby), E (Enable), and N (No Connect) options. Verify pin-1 polarity before substituting. Do not exceed 3.63 V on VDD; the device is not 5 V tolerant. Finally, do not add an external series resistor on the OUT pin unless your load requires source termination - the HCMOS driver is designed for direct connection to high-impedance MCU clock inputs.
合规信息
RoHS and REACH compliant per SiTime product page. Not AEC-Q100 qualified - SiTime refers AEC-Q100 designs to SiT1618/SiT8918/SiT8920 families. Lead-free reflow-compatible per MSL rating (exact MSL level not in verified data - see _validation_note).