Product Overview
The Skyworks Si535/536 is an Ultra Low Jitter Crystal Oscillator (XO) that utilizes advanced DSPLL circuitry to deliver high-speed differential frequencies with exceptional stability and reliability. Unlike traditional XOs, it employs 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 system environments. The Si535/536 is factory programmed for immediate use and is available in industry-standard 5 x 7 mm packages.
Product Attributes
- Brand: Skyworks Solutions, Inc.
- Technology: DSPLL circuitry
- Package: 5 x 7 mm
- Compliance: Pb-free/RoHS-compliant
- Certifications: Meets MIL-STD-883 qualification test requirements
Technical Specifications
| Model | Frequency Range | Supply Voltage Options | Output Options | Temperature Stability | Phase Jitter (RMS) | Period Jitter (RMS) | Operating Temperature Range |
|---|---|---|---|---|---|---|---|
| Si535/Si536 | 100 MHz to 312.5 MHz | 3.3 V, 2.5 V | LVPECL, LVDS | 7 ppm or 20 ppm (Total Stability: 20 ppm or 31.5 ppm) | 0.19 to 0.35 ps (10 kHz to 1 MHz) | 2 ps | -40 C to 85 C |
Applications
- 10/40/100G data centers
- 10G Ethernet switches/routers
- Fibre channel/SAS/storage
- Enterprise servers
- Networking
- Telecommunications
Electrical Specifications
| Parameter | Symbol | Test Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| 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 |
Frequency Characteristics
| Parameter | Symbol | Test Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| 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 to +85C | 10 | ms |
Output Levels and Symmetry
| Parameter | Symbol | Test Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| LVPECL Mid-level Output | VO | VDD 1.42 | VDD 1.25 | V | ||
| LVPECL Differential Swing | VOD | 1.1 | 1.9 | VPP | ||
| LVPECL Single-ended Swing | VSE | 0.55 | 0.95 | VPP | ||
| LVDS Mid-level Output | VO | 1.125 | 1.20 | 1.275 | V | |
| LVDS Differential Swing | VOD | 0.5 | 0.7 | 0.9 | VPP | |
| Rise/Fall time (20/80%) | tR, tF | 350 | ps | |||
| Symmetry (duty cycle) Differential | SYM | 45 | 55 | % |
Phase Jitter
| Parameter | Symbol | Test Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| 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
| Parameter | Symbol | Test Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| Period Jitter (RMS) | JPER | N = 1000 cycles | 2 | ps | ||
| Period Jitter (Peak-to-Peak) | JPER | N = 1000 cycles | 14 | ps |
Environmental Compliance
| Parameter | Conditions/Test Method |
|---|---|
| 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 |
| Contact Pads | Gold over Nickel |
Thermal Characteristics
| Parameter | Symbol | Test Condition | Min | Typ | Max | Unit |
|---|---|---|---|---|---|---|
| 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
| Parameter | Rating | Unit | |
|---|---|---|---|
| Maximum Operating Temperature | TAMAX | 85 | C |
| Supply Voltage, 2.5/3.3 V Option | VDD | 0.5 to +3.8 | V |
| Input Voltage (any input pin) | VI | 0.5 to VDD + 0.3 | V |
| Storage Temperature | TS | 55 to +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
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 |
Note: OE includes a 17 k pullup resistor to VDD.
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 |
Note: OE includes a 17 k pullup resistor to VDD.
Ordering Information
The Si535/536 XO series is available in an industry-standard, RoHS compliant, 6-pad, 5 x 7 mm package. The Si536 Series offers an alternate OE pinout (pin #1). Ordering options include frequency, temperature stability, output format, and VDD.
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)
Package Outline
Dimensions are provided in millimeters (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 are provided in millimeters (mm).
| Dimension | Min | C1 | E | X1 | Y1 |
|---|---|---|---|---|---|
| Value | 4.20 | 2.54 | 1.55 | 1.95 |
2411272144_SKYWORKS-535EC000305DGR_C17552504.pdf
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