toyocom cristal oscillators

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Toyocom XO eng

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CRYSTAL OSCILLATORS General .............................................2 CRYSTAL OSCILLATORS LINE UP ......5 Product Data (VC-TCXO/TCXO)TCO-5830 (0.012cc) ........................7 TCO-5826, 5828 (0.024cc) ..............8 TCO-5816, 5818 (0.027cc) ..............9 TCO-9141 (0.024cc) ......................10 TCO-9133 (0.06cc) .........................11 TCO-999 (0.126cc) ........................12 TCO-5000, 5100 (0.4cc) ................13 Electrical Data.................................14 Measuring Circuit ............................17 Product Data (VCXO) TCO-730Z2, 734A, 735 Series .......18 TCO-291 Series ..............................19 TCO-293A.......................................21 TCO-2100 Series ............................22 TCO-2110 Series ............................23 TCO-2120 Series ............................24 TCO-726DVX, 726DHVX, 726BVX....25 TCO-756BVX7, 756DVX7...............26 TFG-756DVX7 ................................27 TCO-7116Z1V2 ...............................28 Electrical Data.................................29 Measuring Circuit ............................31

Product Data (SPXO)TCO-3110 Series ............................34 Measuring Circuit ............................35

Product Data (OCXO)TCO-632B, 639E, 635 Series .........36 TCO-6600 .......................................37 TCO-6730 .......................................38 TCO-676, 679 .................................39 TCO-6831 .......................................40 Electrical Data.................................41 Measuring Circuit ............................43

Product Data (SMO-N/SMO-N-K/DIP-14P)TCO-787RH3, 786RH, 787RH ..........44 TCO-786NH, 787NH.......................45 TCO-786KH, 787KH .......................46 TCO-786ZH, 787ZH........................47 TFG-787RH3, 786RH, 786XH ........48 TCO-787SH3, 785SH, 785YH ........49 TCO-743A7, 743HC7,743TH7........50 Measuring Circuit ............................51 Reference Footprint ....................52 PACKAGING (Tape and Reel) ....54

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CRYSTAL OSCILLATORS

General

1. TCXO (Temperature Compensated Crystal Oscillator)A TCXO is a crystal oscillator with a temperature-sensitive reactance circuit in its oscillation loop to compensate the frequency-temperature characteristics inherent to the crystal unit. TOYOCOM TCXOs are classified into two types. One is a Direct-Type TCXO with a temperature compensation circuit built into the oscillation loop. The other is an Indirect-Type TCXO with a temperature compensation circuit outside the oscillation loop, in which the oscillation frequency is therefore indirectly controlled. Circuit diagrams of the two types of TCXO are shown in Figs. 1 and 2.Temperature compensation network Vcc

In the case of the TCO-900 series, the temperature compensation circuit is inserted directly into the crystal oscillation loop as shown in Fig.1. Since a stable supply of power to the oscillation circuit is unnecessary, the power consumption and case size of the TCO-900 series are substantially reduced. Because of these features, the TCO-900 series is widely used as a reference oscillator for synthesizers in mobile communication systems all over the world. In particular, the size of the recently developed TCO-5811 is just 0.027cc, which enables the further compact design of mobile terminals.

Vcc Temperature compensation network

OSC

O/P

OSC

O/P

Fig.1 Simplified schema of the indirect compensation

Fig.2 Simplified schema of the direct compensation TCXO

2. VCXO (Voltage Controlled Crystal Oscillator)A VCXO (Voltage Controlled Crystal Oscillator) is a crystal oscillator the output frequency of which is controlled by adding an external control voltage via a frequency control input on a variable capacitance component such as a varactor diode connected in parallel to a load capacitance (CL). TOYOCOM VCXOs are divided into two types according to VoltageFrequency (V-F) characteristic slopes depending on the AFC (Automatic Frequency Control) input configuration of the VCXO. One is a VCXO with a positive V-F slope and the other is a VCXO with a negative V-F slope. Please note that the input voltage of a control circuit will vary according to the individual type, as shown in Figs. 3 and 4. TOYOCOM's VCXOs are capable of either, depending on the customer's preference. TOYOCOM's VCXOs have been increasingly used for broader applications such as slave oscillators in phased-lock loops, or frequency modulators.

Vcc

Voltage Regulator

Vcc

AF INPUT +V V

OSC

O/P

AF INPUT 0V V

OSC

O/P

F (Hz)

Positive slope

F (Hz)

Negative slope

V V +V

AF input volt. (V)

V 0

+V

AF input volt. (V)

Fig.3 Control voltage characteristics of VCXO (positive slope)

Fig.4 Control voltage characteristics of VCXO (negative slope)

3. OCXO (Oven Controlled Crystal Oscillator)High frequency stability is obtained in these oscillators by putting the crystal unit in a high precision oven, which keeps the ambient temperature constant. Since the temperature inside the oven is adjusted to the zero temperature coefficient of each crystal oscillator, high stability is obtained. Because an AGC (Automatic Gain Control) circuit is provided in the oscillation circuit of the TCO-613, -615, and -632 series, high stability of output frequency (5 ~ 10X109 / 10 ~ +60C)is being realized and its short-term frequency stability and frequency vs. supply voltage characteristic are excellent. These oscillators are therefore widely used as a source of standard frequency in satellite navigation systems such as the SSNN and various measurement systems.

4. VC-TCXO, VC-OCXOAmong the above types, a VCXO combined with a TCXO, or a VCXO combined with an OCXO, is called a VC-TCXO or a VC-OCXO, respectively. These components have the merit of delicately controlling their output frequency electrically.

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CRYSTAL OSCILLATORS

5. SPXO (Simple Packaged Crystal Oscillator)SPXO delivers excellent frequency stability without the necessity of temperature compensation and frequency control. SPXO with a high frequency range TCO-3110 Series is a direct oscillation crystal oscillator that employs an HFF (High Frequency Fundamental) crystal developed by TOYOCOM. It is mainly installed in transmission equipment.

6. Crystal Clock Oscillators1) GeneralCrystal clock oscillations are high-frequency devices that supply clock signals to variou electronic circuits. They can be used in lead-electrode and surface mounting applications over frequency ranges from 1.5MHz to 140MHz. Housing crystal units that consist of AT or BT cut fundamental or overtone and their oscillation circuit in the same package, our crystal clock oscillators are designed and manufactured to provide a stable output of signals when the set voltage is applied. Generally, when customers buy crystal units and use them in thier oscillation circuits, they first need to provide analog settings prior to the installation. These include the settings of load capacitance, oscillation allowance, and variations in characteristics due to temperature changes. With Toyocom's crystal clock oscillators, these settings are already provided by us, so their output signals can directly control TTL and CMOS ICs. This shortens design processes for customers and contributes to standardizing parts to be used. Our crystal clock oscillators also feature a VCXO function and a Try-state function. The VCXO function enables control of output frequencies with external control voltage, whereas the Try-state feature maintains the output terminals at high impedance levels by outputting signals with control siganls while the power is supplied. For further details about individual products, please refer to their specification sheets.

2) Definition of symbols and abbreviationsVOLTAGES VCC (Opr)

VIH (Min)

VIL (Max)

VOH (Min)

VOL (Max)

All voltages are referenced to ground. Operating voltage: The range of power supply voltage over which the oscillator is guaranteed to operate within the specified limits. Input HIGH voltage (Mnimum): The minimum value represents the guaranteed input logic HIGH threshold for the oscillator. Input LOW voltage (Maximum): The maximum value represents the guaranteed input logic LOW threshold for the oscillator. Output HIGH voltage (Minimum): The minimum voltage at an output terminal for the specified output current IOH and at the minimum value of VCC. Output LOW voltage (Maximum): The maximum voltage at an output terminal sinking the maximum specified load current IOL.

CURRENTS

Icc

Topr fo f/fo SYM tr tf n CL RL tst

Positive current is defined as current flow into an oscillator. Negative current is defined as current flow out of an oscillator. Operating current : The current flowing into the VCC supply terminal of an oscillator with the specified input and output conditions. Operating temperature. Output frequency of an oscillator. Frequency stability of the output frequency. Symmetry of output waveform at the specified level. Waveform rise time (LOW to HIGH), 0.4V to 2.4V or 10% to 90% or 20% to 80% as specified. Waveform fall time (HIGH to LOW), 2.4V to 0.4V or 90% to 10% or 80% to 20% as specified. Fanout Load capacitance Load resistance Start-up time of the output

3) Output waveform(TTL) (CMOS)

tf VOH

tr

tf VOH2.4VDC

tr 90% or 80%VCC 50%VCC

VOL

TH T

1.4VDC 0.4VDC 0.0VDC TH SYM=100 x T (%)

VOL

TH T

10% or 20%VCC 0.0VDC TH SYM=100 x T (%)

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CRYSTAL OSCILLATORS

4) Directions for proper use Crystal Clock oscillators are high-frquency devices incorporating crystal units and