SIT1602BC-23-33N-28.636300 - 28.6363 MHz LVCMOS XO 3.3V | SiTime
MPN: SIT1602BC-23-33N-28.636300 ✓ Active| Qty | Unit Price | Extended |
|---|---|---|
| 1 | $0.84 | $0.84 |
| 10 | $0.78 | $7.80 |
| 100 | $0.66 | $66.00 |
| 500 | $0.58 | $290.00 |
| 1,000 | $0.52 | $520.00 |
SIT1602BC-23-33N-28.636300 Overview
An XO (crystal oscillator) is a self-contained timing device that delivers a fixed square-wave frequency without requiring an external resonator, used as a system clock source in digital designs. The SiT1602B family is built on SiTime's silicon MEMS technology rather than quartz, which yields superior mechanical robustness, better immunity to vibration and shock, and tighter stability than legacy quartz-based oscillators in the same footprint.
Key features include 28.6363 MHz nominal output, 50 ppm total stability over temperature, 3.3 V single-supply operation, HCMOS/LVCMOS-compatible output drive, and a small 3.2 x 2.5 mm 4-pin SMD package. The datasheet specifies 100% pin-to-pin compatibility with conventional quartz XOs of the same package footprint, simplifying migration paths and re-designs.
Architecturally, the SiT1602B integrates a MEMS resonator, a low-jitter PLL, and an HCMOS output driver on a single die. Because the resonator is silicon and factory-trimmed, the part exhibits markedly better start-up consistency, lower sensitivity to board-level stress, and improved frequency aging versus quartz equivalents, at a comparable bill-of-materials cost.
Typical applications include microcontroller and SoC clocking, USB 2.0 reference timing, industrial automation controllers, consumer-electronics main clocks, and embedded serial-link PHYs. Designers select the SIT1602B family when footprint drop-in replacement of a quartz XO is required alongside tighter temperature behavior and improved mechanical durability.
When designing with this part, place the decoupling capacitor as close as possible to pin 2 (VDD) and route the output trace (pin 4) over a continuous ground reference to minimize radiated emissions. Confirm that downstream counter/PLL input thresholds are compatible with the LVCMOS swing rail.
This page synthesizes distributor pricing, drop-in alternatives, and practical design notes not found on the manufacturer's standard product page.
Drop-in alternatives for SIT1602BC-23-33N-28.636300 — same package, pin-to-pin compatible. Different-package parts requiring PCB rework are excluded.
Quick Comparison Tool — Select alternative parts for side-by-side comparison:
SIT1602BC-23-33E-28.636300
✅ Drop-In📋 Reference alternative (not in catalog)
SIT1602BC-23-33S-28.636300
✅ Drop-In📋 Reference alternative (not in catalog)
SIT1602BC-23-33N-28.636300E
✅ Drop-In📋 Reference alternative (not in catalog)
SIT1602BC-23-33N-28.636300D
✅ Drop-In📋 Reference alternative (not in catalog)
SIT1602BC-13-33N-28.636300
✅ Drop-In📋 Reference alternative (not in catalog)
SIT1602BC-83-33N-28.636300
✅ Drop-In📋 Reference alternative (not in catalog)
SIT1602BC-32-33N-28.636300
✅ Drop-In📋 Reference alternative (not in catalog)
SIT1602BC-23-33N-28.636300 Specifications
| Device Type | LVCMOS Crystal Oscillator (XO) |
| Nominal Frequency | 28.636300 MHz |
| Frequency Stability | ±50 ppm |
| Supply Voltage | 3.3 V |
| Output Logic | HCMOS / LVCMOS |
| Operating Temperature Range | -20 °C to +70 °C |
| Output Drive Strength | Default |
| Pin 1 Function | No Connect |
| Package Size | 3.2 x 2.5 mm |
| Package Type | 4-SMD, No Lead |
| Mounting Type | Surface Mount |
| Current Consumption | 4.5 mA typical |
| RoHS Status | Compliant |
SIT1602BC-23-33N-28.636300 Pin Configuration
| Pin 1 | NC/ST — Pin 1 function per datasheet; in this N-suffix variant it is a No Connect. Pin can be set to Output Enable, Standby, or NC across the family. |
| Pin 2 | GND — Ground reference; place decoupling capacitor close to this pin. |
| Pin 3 | OUT — HCMOS/LVCMOS clock output. |
| Pin 4 | VDD — Supply voltage (3.3 V for this part number). |
Typical Applications
SIT1602BC-23-33N-28.636300 is suitable for 6 applications: Microcontroller and SoC Clocking, USB 2.0 Reference Timing, Industrial Automation Controllers, Consumer Electronics Main Clocks, Embedded Serial-Link PHY Clocking, Sensor Hub and IoT Edge Nodes.
Microcontroller and SoC Clocking
The SIT1602BC-23-33N-28.636300 provides a precise 28.6363 MHz reference clock for microcontroller and SoC clock input pins. Its 50 ppm stability and 3.3 V LVCMOS output swing match typical MCU external clock requirements directly, eliminating the need for an external frequency reference or bias components. Where the MCU offers an internal PLL multiplier, this SiT1602B output acts as the foundation for any internal system frequencies (CPU core, peripherals, bus interfaces). At 4.5 mA typical current consumption, the part contributes minimal current to battery-powered designs while keeping start-up deterministic across cold- and warm-power cycles.
Recommended
USB 2.0 Reference Timing
USB 2.0 controllers and PHYs need a clean, low-jitter reference clock in the 25-30 MHz band. The SIT1602BC-23-33N-28.636300 outputs 28.6363 MHz with HCMOS/LVCMOS levels, well-suited to feed a USB transceiver through a short, properly terminated trace. Designers route the output over a continuous ground reference and add a 33 ohm series terminator to suppress ringing. Combined with 50 ppm stability across -20 to +70 °C, the result is a reliable USB reference that holds the bus within the 0.25% precision required by the USB 2.0 specification.
Recommended
Industrial Automation Controllers
Factory automation PLCs, motor controllers, and sensor aggregators demand timing that survives elevated ambient temperatures and mechanical vibration. The SIT1602BC-23-33N-28.636300 features -20 °C to +70 °C operation and MEMS-based construction that withstands board-level stress better than legacy quartz units. Its small 3.2 x 2.5 mm 4-SMD footprint allows dense routing on PLC controller boards, and the factory-trimmed 50 ppm output removes the need for periodic recalibration in the field. Industrial designs benefit from the part's predictable frequency across production lots and its long-term aging performance versus typical quartz.
Recommended
Consumer Electronics Main Clocks
Set-top boxes, smart speakers, wearables, and home appliances benefit from the SIT1602BC-23-33N-28.636300's compact footprint, low current draw, and drop-in compatibility with legacy quartz oscillators. When migrating a quartz-based design to MEMS, the SiT1602B minimizes board rework because the pinout and land pattern remain identical. The 3.3 V LVCMOS output drives downstream logic directly, while the LVCMOS swing is compatible with common MCU clock domains. Mass-production cost savings also arise from the part's compatibility with high-speed SMT pick-and-place equipment.
Recommended
Embedded Serial-Link PHY Clocking
Serial PHYs (for Ethernet, HDMI bridges, mid-speed LVDS links) often need an external 25-30 MHz reference. The SIT1602BC-23-33N-28.636300 supplies 28.6363 MHz at 3.3 V with HCMOS-compatible output, ideal for clock inputs on Ethernet PHYs or HDMI bridges that prefer frequencies like 28.6363 MHz. Designers route the trace as a 50-ohm-controlled-impedance path and keep the output-to-PHY distance below 25 mm to preserve edges. The MEMS design adds mechanical robustness for PCB-bending applications such as board-to-board flex assemblies.
Recommended
Sensor Hub and IoT Edge Nodes
Wi-Fi/BLE sensor hubs and IoT edge devices use the SIT1602BC-23-33N-28.636300 to clock resident MCUs and radio coprocessors. Its 4.5 mA typical current draw is acceptable for wall-powered edge devices and exceeds battery designs only marginally. The SiT1602B is far more mechanically robust than quartz, helping designs pass drop-and-vibration reliability tests required by connected-home certifications. The fixed-frequency output lets designers tune RF PLL multipliers to common ISM-band channels without complex frequency planning.
Recommended
Recommended Products Summary
Engineering reference data for SIT1602BC-23-33N-28.636300 — comparison, design guidance, and compliance information.
Selection Guide
Comparison with Alternatives
| Parameter | This Product | SIT1602BC-23-33E-28.636300 | SIT1602BC-23-33S-28.636300 | SIT1602BC-23-33N-28.636300E | SIT1602BC-13-33N-28.636300 |
|---|---|---|---|---|---|
| Brand | SiTime | SiTime (same family) | SiTime (same family) | SiTime (same family) | SiTime (same family) |
| Package | 3.2 x 2.5 mm 4-SMD | 3.2 x 2.5 mm 4-SMD - same | 3.2 x 2.5 mm 4-SMD - same | 3.2 x 2.5 mm 4-SMD - same | 2.5 x 2.0 mm 4-SMD - smaller |
| Output Frequency | 28.6363 MHz | 28.6363 MHz | 28.6363 MHz | 28.6363 MHz | 28.6363 MHz |
| Supply Voltage | 3.3 V | 3.3 V | 3.3 V | 3.3 V | 3.3 V |
| Frequency Stability | ±50 ppm | ±20 ppm (tighter) | ±50 ppm | ±50 ppm | ±50 ppm |
| Pin 1 Function | No Connect | No Connect | Standby | No Connect | No Connect |
| Operating Temperature | -20 °C to +70 °C | -20 °C to +70 °C | -20 °C to +70 °C | -20 °C to +70 °C | -20 °C to +70 °C |
| Technology | Si MEMS | Si MEMS | Si MEMS | Si MEMS | Si MEMS |
Key Differentiators
- Silicon MEMS resonator vs conventional quartz (vs Generic quartz-based XO at same 28.6363 MHz)
- 100% pin-to-pin drop-in replacement for quartz XOs (vs SIT1602BC-13-33N-28.636300 (2.5x2.0 mm))
- Pin 1 No-Connect simplifies EMC compliance (vs SIT1602BC-23-33S-28.636300 (Standby variant))
Design Notes
Place a 0.1 µF X7R ceramic decoupling capacitor as close as possible to the VDD pin (pin 4) and a 10 µF bulk capacitor within 5 mm. Route the OUT trace (pin 3) over a continuous ground plane with controlled 50 Ω impedance for traces longer than 8 mm, to suppress ringing and EMI. Keep the trace away from switching regulator inductors and high-current digital paths to minimize noise coupling into the output.
Although pin 1 is marked No Connect on this N-suffix variant, the SiT1602B family allows configuring pin 1 as Output Enable or Standby by ordering a different suffix. Mistakenly driving pin 1 of the NC variant causes load on the internal oscillator and may shift frequency by several ppm. Always verify the suffix in the part marking versus the intended pin-1 function before designing the schematic.
Estimated: when driving a capacitive load heavier than 15 pF, the rise/fall time of the LVCMOS output slows measurably and adds duty-cycle distortion. For loads up to 30 pF, add a 33 Ω series resistor at the output to absorb reflections and bring rise time back to datasheet typicals. For very low-jitter applications (e.g., high-speed ADC sampling), keep series resistance under 22 Ω and place the receiving device within 12 mm of the XO.
Compliance Information
Compliant with EU RoHS Directive 2011/65/EU per SiTime published compliance statement. Lead-free reflow profile per JEDEC J-STD-020. Halogen-free molding compound per SiTime product declaration. Not AEC-Q100 qualified; the SiT1602B family is intended for industrial/commercial, not automotive.