Skyworks Solutions Si535/536 Ultra Low Jitter Crystal Oscillator (XO)
Product Overview
The Skyworks Si535/536 Ultra Low Jitter Crystal Oscillator (XO) leverages advanced DSPLL circuitry to deliver exceptionally low jitter clock signals at high-speed differential frequencies. Unlike traditional XOs that require a unique crystal for each output frequency, the Si535/536 utilizes a single fixed crystal to generate a wide range of output frequencies. This IC-based design ensures exceptional frequency stability and reliability. The DSPLL clock synthesis offers superior supply noise rejection, simplifying the generation of low jitter clocks in noisy environments common in communication systems. Factory programmed at the time of shipment, this IC-based XO eliminates long lead times associated with custom oscillators.
Applications
- 10/40/100G data centers
- 10G Ethernet switches/routers
- Fibre channel/SAS/storage
- Enterprise servers
- Networking
- Telecommunications
Product Attributes
- Brand: Skyworks Solutions
- Technology: DSPLL circuitry
- Package: Industry-standard 5 x 7 mm
- Compliance: Pb-free/RoHS-compliant
- Contact Pads: Gold over Nickel
Technical Specifications
| Parameter | Symbol | Test Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Recommended Operating Conditions | ||||||
| Supply Voltage (3.3 V option) | VDD | 2.97 | 3.3 | 3.63 | V | |
| Supply Voltage (2.5 V option) | VDD | 2.25 | 2.5 | 2.75 | V | |
| Supply Current (Output enabled, LVPECL) | IDD | 111 | 121 | mA | ||
| Supply Current (Output enabled, LVDS) | IDD | 90 | 98 | mA | ||
| Supply Current (Tristate mode) | IDD | 60 | 75 | mA | ||
| Output Enable (OE) VIH | VIH | 0.75 x VDD | V | |||
| Output Enable (OE) VIL | VIL | 0.5 | V | |||
| Operating Temperature Range | TA | 40 | 85 | C | ||
| Output Frequency Characteristics | ||||||
| Nominal Frequency | fO | LVPECL/LVDS | 100 | 312.5 | MHz | |
| Initial Accuracy | fi | Measured at +25 C at time of shipping | 1.5 | ppm | ||
| Temperature Stability (20 ppm option) | 7 | +7 | ppm | |||
| Temperature Stability (7 ppm option) | 20 | +20 | ppm | |||
| Aging (Frequency drift over first year) | fa | 3 | ppm | |||
| Aging (Frequency drift over 20 year life) | fa | 10 | ppm | |||
| Total Stability (Temp stability = 20 ppm) | 31.5 | ppm | ||||
| Total Stability (Temp stability = 7 ppm) | 20 | ppm | ||||
| Powerup Time | tOSC | TA = 40C to +85C | 10 | ms | ||
| Output Levels and Symmetry | ||||||
| LVPECL Mid-level | VO | 50 to VDD 2.0 V | VDD 1.42 | VDD 1.25 | V | |
| LVPECL Swing (diff) | VOD | 1.1 | 1.9 | VPP | ||
| LVPECL Swing (Single-ended) | VSE | 0.55 | 0.95 | VPP | ||
| LVDS Mid-level | VO | Rterm = 100 (differential) | 1.125 | 1.20 | 1.275 | V |
| LVDS Swing (diff) | VOD | 0.5 | 0.7 | 0.9 | VPP | |
| Rise/Fall time (20/80%) | tR, tF | 350 | ps | |||
| Symmetry (duty cycle) | SYM | Differential | 45 | 55 | % | |
| Phase Jitter | ||||||
| Phase Jitter* (RMS) | J | 10 kHz to 1 MHz (data center) | 0.19 | 0.35 | ps | |
| Phase Jitter* (RMS) | J | 12 kHz to 20 MHz brickwall | 0.25 | 0.40 | ps | |
| Period Jitter | ||||||
| Period Jitter* (RMS) | JPER | N = 1000 cycles | 2 | ps | ||
| Period Jitter* (Peak-to-Peak) | JPER | N = 1000 cycles | 14 | ps | ||
| Environmental Compliance | ||||||
| Mechanical Shock | MIL-STD-883, Method 2002 | |||||
| Mechanical Vibration | MIL-STD-883, Method 2007 | |||||
| Solderability | MIL-STD-883, Method 2003 | |||||
| Gross & Fine Leak | MIL-STD-883, Method 1014 | |||||
| Resistance to Solder Heat | MIL-STD-883, Method 2036 | |||||
| Moisture Sensitivity Level | J-STD-020, MSL1 | |||||
| Thermal Characteristics (Typical values TA = 25 C, VDD = 3.3 V) | ||||||
| Thermal Resistance Junction to Ambient | JA | Still Air | 84.6 | C/W | ||
| Thermal Resistance Junction to Case | JC | Still Air | 38.8 | C/W | ||
| Ambient Temperature | TA | 40 | 85 | C | ||
| Junction Temperature | TJ | 125 | C | |||
| Absolute Maximum Ratings | ||||||
| Maximum Operating Temperature | TAMAX | 85 | C | |||
| Supply Voltage, 2.5/3.3 V Option | VDD | 0.5 | +3.8 | V | ||
| Input Voltage (any input pin) | VI | 0.5 | VDD + 0.3 | V | ||
| Storage Temperature | TS | 55 | +125 | C | ||
| ESD Sensitivity (HBM, per JESD22-A114) | ESD | 2500 | V | |||
| Soldering Temperature (Pb-free profile) | TPEAK | 260 | C | |||
| Soldering Temperature Time @ TPEAK (Pb-free profile) | tP | 2040 | seconds | |||
Pin Descriptions
| Pin | Symbol | Function |
|---|---|---|
| Si535 Series Pinout | ||
| 1 | NC | No connection |
| 2 | OE | Output enable (0 = clock output disabled, outputs tristated; 1 = clock output enabled) |
| 3 | GND | Electrical and Case Ground |
| 4 | CLK+ | Oscillator Output |
| 5 | CLK | Complementary Output |
| 6 | VDD | Power Supply Voltage |
| *Note: OE includes a 17 k pullup resistor to VDD. | ||
| Si536 Series Pinout | ||
| 1 | OE | Output enable (0 = clock output disabled, outputs tristated; 1 = clock output enabled) |
| 2 | NC | No connection |
| 3 | GND | Electrical and Case Ground |
| 4 | CLK+ | Oscillator Output |
| 5 | CLK | Complementary Output |
| 6 | VDD | Power Supply Voltage |
| *Note: OE includes a 17 k pullup resistor to VDD. | ||
Ordering Information
The Si535/536 XO series supports various options including frequency, temperature stability, output format, and VDD. The Si536 Series features an alternate OE pinout (pin #1) for LVPECL and LVDS output formats. The devices are supplied in an industry-standard, RoHS compliant, 6-pad, 5 x 7 mm package.
Part Number Convention Example: 535AB156M250DGR
- 535: Device Series (535 or 536)
- A: VDD (3.3 V)
- B: Output Format (LVPECL)
- 156M250: Frequency (156.250 MHz)
- D: Temperature Stability (20 ppm)
- G: Operating Temp Range (C) (-40 to +85 C)
- R: Packaging (Tape & Reel)
Available Frequencies (Examples):
- 100.000 MHz (100M000)
- 156.250 MHz (156M250)
- 312.500 MHz (312M500)
Temperature Stability Options:
- 20 ppm (Code B)
- 7 ppm (Code C)
Package Outline Dimensions (mm)
| Dimension | Min | Nom | Max |
|---|---|---|---|
| A | 1.50 | 1.65 | 1.80 |
| b | 1.30 | 1.40 | 1.50 |
| c | 0.50 | 0.60 | 0.70 |
| D | 5.00 BSC | ||
| D1 | 4.30 | 4.40 | 4.50 |
| e | 2.54 BSC | ||
| E | 7.00 BSC | ||
| E1 | 6.10 | 6.20 | 6.30 |
| H | 0.55 | 0.65 | 0.75 |
| L | 1.17 | 1.27 | 1.37 |
| p | 1.80 | 2.60 | |
| R | 0.70 REF | ||
| aaa | 0.15 | ||
| bbb | 0.15 | ||
| ccc | 0.10 | ||
| ddd | 0.10 | ||
| eee | 0.05 | ||
6-Pin PCB Land Pattern Dimensions (mm)
| Dimension | Min | Value | Notes |
|---|---|---|---|
| C1 | 4.20 | ||
| E | 2.54 | ||
| X1 | 1.55 | ||
| Y1 | 1.95 |
2411272144_SKYWORKS-535AC156M250DG_C17530289.pdf
Please Use Our Online Inquiry Contact Form Below If You Have Any Questions, Our Team Will Get Back To You As Soon As Possible
