Product Overview
The Skyworks Si535/536 is an Ultra Low Jitter Crystal Oscillator (XO) that leverages advanced DSPLL circuitry to deliver high-speed differential frequencies with exceptional stability and reliability. Unlike traditional XOs, it utilizes a single fixed crystal to generate a wide range of output frequencies, simplifying design and reducing lead times. Its IC-based design offers superior supply noise rejection, making it ideal for generating low-jitter clocks in noisy communication environments. The Si535/536 is factory programmed at shipment and is available in industry-standard 5 x 7 mm packages.
Product Attributes
- Brand: Skyworks Solutions, Inc.
- Technology: DSPLL circuitry
- Compliance: Pb-free/RoHS-compliant
- Package: Industry-standard 5 x 7 mm
- Certifications: Meets MIL-STD-883 qualification test requirements
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 VIH | OE | 0.75 x VDD | V | |||
| Output Enable VIL | OE | 0.5 | V | |||
| Operating Temperature Range | TA | 40 | 85 | C | ||
| CLK 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 | 7 | 20 | +7, +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 +85C | 10 | ms | ||
| CLK Output Levels and Symmetry | ||||||
| LVPECL Mid-level Output | VO | 50 to VDD 2.0 V | VDD 1.42 | VDD 1.25 | VDD | V |
| LVPECL Differential Swing | VOD | 1.1 | 1.9 | VPP | ||
| LVDS Differential Swing | VOD | Rterm = 100 (differential) | 0.5 | 0.7 | 0.9 | VPP |
| Rise/Fall time (20/80%) | tR, tF | 350 | ps | |||
| Symmetry (duty cycle) Differential | SYM | 45 | 55 | % | ||
| CLK Output 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 | |
| CLK Output Period Jitter | ||||||
| Period Jitter (RMS) | JPER | N = 1000 cycles | 2 | ps | ||
| Period Jitter (Peak-to-Peak) | JPER | N = 1000 cycles | 14 | ps | ||
| Thermal Characteristics | ||||||
| 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 | |||
| Package Diagram Dimensions | ||||||
| Dimension | Min | Nom | Max | Unit | ||
| A | 1.50 | 1.65 | 1.80 | mm | ||
| b | 1.30 | 1.40 | 1.50 | mm | ||
| c | 0.50 | 0.60 | 0.70 | mm | ||
| D | 5.00 | BSC | mm | |||
| D1 | 4.30 | 4.40 | 4.50 | mm | ||
| e | 2.54 | BSC | mm | |||
| E | 7.00 | BSC | mm | |||
| E1 | 6.10 | 6.20 | 6.30 | mm | ||
| H | 0.55 | 0.65 | 0.75 | mm | ||
| L | 1.17 | 1.27 | 1.37 | mm | ||
| p | 1.80 | 2.60 | mm | |||
| R | 0.70 | REF | mm | |||
| aaa | 0.15 | mm | ||||
| bbb | 0.15 | mm | ||||
| ccc | 0.10 | mm | ||||
| ddd | 0.10 | mm | ||||
| eee | 0.05 | mm | ||||
Applications
- 10/40/100G data centers
- 10G Ethernet switches/routers
- Fibre channel/SAS/storage
- Enterprise servers
- Networking
- Telecommunications
Pin Descriptions
Si535 Series Pinout
| Pin | Symbol | Function |
|---|---|---|
| 1 | NC | No connection |
| 2 | OE | Output enable (0 = clock output disabled, 1 = clock output enabled) |
| 3 | GND | Electrical and Case Ground |
| 4 | CLK+ | Oscillator Output |
| 5 | CLK | Complementary Output |
| 6 | VDD | Power Supply Voltage |
Si536 Series Pinout
| Pin | Symbol | Function |
|---|---|---|
| 1 | OE | Output enable (0 = clock output disabled, 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 |
Ordering Information
The Si535/536 XO series supports various options including frequency, temperature stability, output format, and VDD. The Si536 Series supports an alternate OE pinout (pin #1) compared to the Si535 Series (pin #2).
Part Number Convention Example: 535AB156M250DGR
- 535: Device type (535 or 536)
- A: VDD (3.3V)
- 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)
- 125.000 MHz (125M000)
- 156.250 MHz (156M250)
- 312.500 MHz (312M500)
Temperature Stability Options:
- B: 20 ppm (Total Stability 31.5 ppm)
- C: 7 ppm (Total Stability 20 ppm)
2411272144_SKYWORKS-536AC000175DG_C17582103.pdf
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