|
Details, datasheet, quote on part number:VCUGCD
| |
| Part: | VCUGCD |
| Category: | Timing Circuits => Oscillators => VCXO (Voltage Controlled Crystal Oscillators) |
| Description: | Frequency Range = 1.024MHz - 77.760MHz ;; Output = TTL / CMOS ;; Package (mm) = 5.0 X 7.5 X 2.1 ;; Features = Tristate |
| Company: | Vectron International |
| Datasheet: | Download VCUGCD datasheet File size : 256 kB |
| Request For quote: | Find where to buy VCUGCD
|
| |
Datasheet text preview:
Product Data Sheet
V-Type
Voltage Controlled Crystal Oscillator (VCXO)
Features · Output Frequencies to 77.760 MHz · 5.0 or 3.3 volt operation · Tri-State Output · Jitter Performance 12MHz) · VCXO with SwitchableTTL/CMOS Output · Robust 6 contact Leadless Ceramic Chip Carrier · 7.49 x 5.08 x 1.8 mm Surface Mount Device · Absolute Pull Range Performance to 100 ppm · Commercial and Industrial Temperature Range · EIA Compatible Tape and Reel Packaging Applications · · · · xDSL Customer Premise Equipment (CPE) Cable Modems HFC Subscriber Equipmemt ATM/SONET/SDH applications
Description The VI V-Type Voltage Controlled Crystal Oscillator (VCXO) is a quartz-stabilized square-wave generator with selectable TTL or CMOS output. The device is hermetically sealed in a leadless ceramic chip carrier with 6 contact pads. The V-Type's ultra small footprint and low profile make it ideally suited to applications where space is limited or where backside assembly is required.
V-Type Voltage Controlled Crystal Oscillator (VCXO)
Pin Information
Table 1.
Pin #
1 2
2
Symbol
Vc TTL/CMOS GND Output Tri-state VDD
1
Name/Function
Control Voltage. TTL logic low for CMOS optimized symmetry TTL logic high or no connection for TTL optimized symmetry. Case/circuit ground. Output waveform. TTL logic low diables output. TTL logic high or no connection enables output waveform. Supply Voltage, 5 V ±10%, or 3.3V ±10% than 12 MHz, this option is not provided as the waveform transition times are small compared to the period. Hence, for fo <12 MHz this pin should be grounded for electrical isolation. 2. Alternate Pin Configuration for Tri-state Control on Pin 2 and TTL/CMOS on pin 5. Alternate Configuration is indicated by last letter of part code "D" for TriState Pin 2 and TTL/CMOS on pin 5.
3 4 52 6
1. This silicon oscillator is fabricated in CMOS technology and its output waveform will swing between ground and VDD for all but the highest frequency applications. To account for the difference in switching thresholds between TTL logic (1.40 V) and CMOS logic (VDD/2), the TTL/CMOS lead modifies the "on time" of the oscillator for maximum symmetry about the TTL or CMOS logic threshold. TTL logic low provides waveform symmetry for CMOS. TTL logic high or no connection provides waveform symmetry for TTL. At output frequencies less
Table 2. Performance Specifications
Parameter
Supply Voltage' (5V or 3.3V) Supply Current (Frequency Dependent) OutputVoltage Levels (VDD = 4.5V): Output Logic High 2 Output Logic Low 2 Transition Times 2: Rise Time Fall Time Symmetry or Duty Cycle3 Nominal Output Frequency (see ordering info) Control Voltage (5v), test conditions for APR Control Voltage (3.3v), test conditions for APR Control Voltage Absolute Pull Range (see ordering info) Leakage Current of Control Input Control Voltage Bandwidth (-3 dB,VC=2.50V)
Symbol
VDD IDD VOH V OL tR tF SYM fo Vc Vc Vc APR Ivcxo BW
Min
0.9*VDD
Max
1.1*VDD
Unit
V mA V V ns ns % MHz V V V uA kHz
See Figures 7,8 0.8*VDD
-
0.1*VDD 5 5
See figure 3, 4 1.024 0.5 0.3 0 ±20 to ±100 -1.0 10 1.0 77.760 4.5 3.0 VDD
1 A 0.1 uF low frequency tantalum bypass capacitor in parallel with a 0.01 uF high-frequency ceramic capacitor is recommended. 2 Figure 1 defines these parameters. Figure 2 illustrates the equivalent five-gate MTTL load and operating conditions under which
these parameters are specified. 3 Symmetry is defined as (ON TIME/PERIOD), with VS = 1.4 V for TTL or VS = 2.5 V for CMOS. per Figure 1.
Vectron International · 166 Glover Avenue, Norwalk, CT 06856 · Tel: 1-88-VECTRON-1 · Fax: 1-888-FAX-VECTRON
2
V-Type Voltage Controlled Crystal Oscillator (VCXO)
Table 3: Typical Single-Side Band Phase Noise Data (dBc/Hz)
Offset From Carrier 10 Hz 100 Hz 1 KHz 10 KHz 100 KHz 6.176MHz -80 -109 -134 -147 -152 12.288MHz -70 -100 -129 -145 -152 VCXO Center Frequency 19.440MHz 32.768MHz 39.3216MHz -70 -68 -63 -100 -98 -93 -129 -125 -122 -145 -147 -144 -152 -152 -151 44.736MHz -63 -93 -122 -144 -151 51.840MHz -63 -93 -122 -144 -151
Electrical Specifications
Figure 1. Output Waveform
*Includes probe and test jig capacitance
Figure 2. Output Test Conditions (Tamb = 25 ±5°C)
Characteristic Curves
Vectron International · 166 Glover Avenue, Norwalk, CT 06856 · Tel: 1-88-VECTRON-1 · Fax: 1-888-FAX-VECTRON
3
|
|
