rakon The CHARON is a SPI controlled high accuracy TCXO with embedded timer and alarm function. The Charon is a high stability 7x5 SMD Digitally Controlled Temperature Controlled Crystal Oscillator (DCTCXO) designed and specified to bring together the highest stability TCXO performance with digital frequency control, separate low frequency output, timer and alarm functionality. jyjjduct description Serial Peripheral Interface (SPI) controlled high accuracy TCXO with embedded timer and alarm function. Using Rakon's advanced Pluto™ analogue frequency compensation system, the DCTCXO achieves unrivalled frequency stability. A custom ASIC, Charon (Pluto's moon) has been designed to closely interface with the Pluto™ ASIC to provide the extra enhanced functionality in a miniature 7x5 SMD package. In addition to market leading stability the Charon device features integrated timing and control functions. A low frequency timing pulse is derived from a programmable division ratio of the high stability oscillator. This drives the onboard 32 bit timer, which coupled to a 32 bit programmable comparator and alarm circuitry, enables a system to enter a low power standby mode and be woken at a precise time in the future. All digital control is via a standard 4-wire SPI interface. Applications • Military • Other Features • 32 bit timer • 32 bit comparator with alarm output • Low frequency timing pulse • Digital frequency adjustment • Low power standby mode 1.2 RoHS compliant Available on request 1.3 Package size available 7.0 mm x 5.0 mm x 2.8 mm 2.0 FREQUENCY CHARACTERISTICS Line Parameter Test Condition Frequency range Frequency calibration Frequency stability over temperature Temperature range Stability vs. supply voltage changes Stability vs. load changes Long term stability Long term stability Drift due to reflow soldering Frequency range available depends on output type (Note 1) At 25°C at mid-range of DAC, reference nominal frequency Reference to (Fmax+Fmin)/2. Max ±0.15 ppm only available over -20°C to 70°C (Note 2) The operating temperature range over which the frequency stability is measured (Note 3) ±5% variation in supply voltage. Nominal value ±0.1 ppm ±10% variation in load. Nominal value ±0.1 ppm At 25°C, first year. Nominal value ±1 ppm At 25°C, 10 years predicted, including first year. Nominal value ±3 ppm At 25°C, at mid-range of DAC, 24 hours after reflow. Unit MHz ppm ppm °C ppm ppm ppm ppm ppm

3.0 POWER SUPPLY Line Parameter Test Condition 3.1 Supply voltage Normally specified as nominal (Vcc) ±5%. 3.2 Supply current 3.3V, load 15pF (min.@ 10MHz, max.@ 40MHz). 3.3 Supply current RF output disabled (min.@ 10MHz, max.@ 40MHz). Unit V mA mA 4.0 HCMOS OSCILLATOR OUTPUT Line Parameter 4.2 Output voltage level high 4.4 Rise and fall times Test Condition HCMOS 10% to 90% of Voh-Vol. Nominal value 6 ns Measured at 50% Vcc Normally specified at CL±10%. Nominal value 15 pF Unit %Vcc %Vcc ns % pF CLIPPED SINEWAVE OSCILLATOR OUTPUT Parameter Output waveform Output voltage...

LF TIMING PULSE: PULSE PERIOD 9.0 Line Parameter 9.1 LF pulse period 9.2 LF pulse period Test Condition Sync counter setting. User programmable register. Sync ratio at power up: 4096 LF timing pulse period = oscillator period * ripple * sync Value Unit LF TIMING PULSE: ENABLE SETTING Parameter LF output off LF output on Test Condition SPI or bonded in paralled to RF enable SPI or bonded in paralled to RF enable Value Unit 11.0 COUNTER Line Parameter 11.1 32 bit timer Test Condition Continuous count of LF, reset on power up, read via SPI Default: 0. Maximum: 232-1 LF counts (232-1)...

16.0 PIN CONNECTIONS Line Parameter 16.1 Pin 1 16.2 Pin 2 16.3 Pin 3 16.4 Pin 4 16.5 Pin 5 16.6 Pin 6 16.7 Pin 7 16.8 Pin 8 16.9 Pin 9 16.10 Pin 10 16.11 Pin 11 16.12 Pin 12 16.13 Note Description SPI-CLK (SCLK) SPI-IN (SDI) SPI-OUT (SDO) GND +Vs* RF out ALARM LF out RF & LF enable Supply, +Vs DAC_OUT/VCXO* SPI-EN (SS enable low) * = No connection required, monitor points used during manufacture 18.0 MANUFACTURING INFORMATION Line Parameter 18.1 Solderability 18.2 Reflow 18.3 Materials Description MIL-STD-202, method 208, category 3 Solder reflow processes as per attached profile. When soldering,...

SIDE VIEW NOTE: Pin connections are detailed in the specificationBOTTOM VIEW TITLE: RFPT200 MODEL OUTLINE DRAWING FILENAME: RFPT200_MD REVISION: A Millimeters [inch] rakon ©2009 Rakon Limited

RFPT200 4 WIRE SPI TIMING DIAGRAM Millimeters [mchj

* NOTE: This profile was used during the qualification testing of the product and therefore represents worst case conditions. It is not recommended for use by the customer in the actual assembly of these parts. TITLE: RFPT200 SERIES REFLOW PROFILE FILENAME: RFPT200_RF RELATED DRAWINGS: SCALE: NTS Millimeters [inch] rakon ©2009 Rakon Limited