NJM2555 622MHz VCXO IC ■PACKAGE OUTLINE ■GENERAL DESCRIPTION The NJM2555 is a 622.08MHz VCXO (Voltage Controlled Crystal Oscillator) IC designed for optical fiber telecommunication systems, using NewJRC superior Bipolar technology, which consists of an oscillation amplifier, a variable capacitor diode, a quadruple (x4) frequency circuit, high pass filter, and limiter amplifier. The NJM2555 generate x4 frequency to add the only 155.52MHz crystal and LC filter, and the output is differential NJM2555C-C NJM2555V LVPECL equivalent. The recommended input crystal frequency is from 120 to 160 MHz. The jitter performance and phase noise is very low based on excellent oscillation circuit. This can be applied to optical communication, especially the WDM system. ■FEATURES ●Operating Voltage ●Frequency range of Crystal ●Output Frequency Range ●Output Level ●A Variable Capacitor on chip ●Bipolar Technology ●Package +3.0V to +3.6V 155.52 MHz typ. (120 to 160 MHz) 622.08 MHz typ. (480 to 640 MHz) differential LVPECL equivalent Die and SSOP-10 ■TERMINAL DESCRIPTION No. Symbol Function 1 VOSC OSC Supply Voltage 2 XT1 Quartz Crystal Connecting terminal 1 3 XT2 Quartz Crystal Connecting terminal 2 4 VVC Frequency Control 5 GND GND=0V 6 FOUT1 Frequency Output 1 7 FOUT2 Frequency Output 2 8 T1 Tunable Filter Terminal 1 9 T2 Tunable Filter Terminal 2 10 VCC VCC=3.3V Starting Point :Die Center Chip Size :1.60x2.00[mm] Chip Thickness :260 ±20[um] Pad Size :90x90[um] ■COORDINATES X 550 140 -80 -435 -635 -635 -395 165 405 635 Y 835 835 835 835 835 -835 -835 -835 -835 -835 unit:[um] 5 4 6 7 1 2 3 4 5 3 2 8 １ 9 10 10 9 8 7 6 ■BLOCK DIAGRAM VCC VOSC XT1 XT2 OSC BUFFER AMP HIGH PASS FILTER T2 T1 LIMITER AMP VVC FOUT2 GND OUTPUT BUFFER FOUT1 Version 3.6 2003/08/22 ( 1 / 3 ) NJM2555 ■ABSOLUTE MAXIMUM RATINGS Parameter Supply Voltage Power Dissipation Operating Temperature Range Storage Temperature Range Symbols VCC PD Topr Tstg ■ELECTRICAL CHARACTERISTICS Parameter Symbol Supply Voltage VCC Operating Current ICC Power Consumption PD Maximum VC Range VCONTH Minimum VC Range VCONTL ■REFERENTIAL DATA Parameter Symbol Output Frequency FOUT (Ta=25°C) Unit V mW °C °C Ratings -0.3 to 5.0 250 (SSOP-10) -40 to +85 -55 to +125 Conditions FOUT=622MHz FOUT=622MHz - Conditions Min.: 120MHz crystal Typ.: 155.5MHz crystal Max.: 160MHz crystal Note 1) 50 ohm load MIN. 3.0 40 120 VCC-0.3 -0.3 TYP. 3.3 50 165 VCC 0 MAX. 3.6 60 216 VCC+0.3 0.3 (Ta=25°C) Unit V mA mW V V Min. (VCC=VOSC=3.3V, Ta=25°C) Typ. Max. Unit 480 622 Frequency Pull Range FCONT ±90 ±100 Output Level POUT -1.5 1.5 Lower & Higher FDU 50 ohm load Note 2) -20 -25 Harmonics D/U Ratio Symmetry SYM 50 ohm load 45 50 Jitter JITTER 50 ohm load 5 9 Note 1) Frequency Pull Range is determined by using 155.5MHz quartz crystal. The parameters are as follows; L1=0.135mH, R1=15.22Ω, C1=7.72fF, Co=2.3pF L1 Note 2) Tunable Filters are connected at T1 & T2 terminals. 640 MHz ±120 4.5 ppm dBm - dBc 55 16 % ps rms C1 R1 Co ■TEST CIRCUIT & BLOCK DIAGRAM VCC VOSC 1 1nF XT1 X'tal T2 OSC Buffer AMP High Pass Filter LIMITER AMP 12nH 13.6p 180nH XT2 T1 VVC VVC VCC 5pF FOUT2 1nF Output Buffer GND FOUT 1000pF 1000pF FOUT1 1nF 1000pF (Type: 033) (Type: 1005) Version 3.6 2003/08/22 ( 2 / 3 ) NJM2555 ■TERMINAL INFORMATION No. Symbol 2, XT1, 3, XT2, and and 4 VVC 6, FOUT1, 7, FOUT2, 8, T1, 9, T2, Equivalent Circuit Comment [CAUTION] The specifications on this data book are only given for information , without any guarantee as regards either mistakes or omissions. The application circuits in this data book are described only to show representative usages of the product and not intended for the guarantee or permission of any right including the industrial rights. Version 3.6 2003/08/22 ( 3 / 3 )