NJM2555 Datasheet, PDF (1/3 Pages) New Japan Radio – 622MHz VCXO IC

NJM2555
622MHz VCXO IC
sGENERAL DESCRIPTION
sPACKAGE OUTLINE
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
LVPECL equivalent. The recommended input crystal frequency is from 120 NJM2555C-C NJM2555V
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.
sFEATURES
qOperating Voltage
qFrequency range of Crystal
qOutput Frequency Range
qOutput Level
qA Variable Capacitor on chip
qBipolar Technology
qPackage
+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
sTERMINAL DESCRIPTION
sCOORDINATES
No. Symbol
Function
X
Y
1 V_OSC OSC Supply Voltage
550
835
2 XT1 Quartz Crystal Connecting terminal 1 140
835
54 32 １
3 XT2 Quartz Crystal Connecting terminal 2 -80
835
4
V_VC Frequency Control
5 GND GND=0V
-435 835
-635 835
6 F_OUT1 Frequency Output 1
7 F_OUT2 Frequency Output 2
8
T1 Tunable Filter Terminal 1
-635
-395
165
-835
-835
-835
67
8 9 10
9
T2 Tunable Filter Terminal 2
405 -835
10 V_CC V_CC=3.3V
635 -835
Starting Point
Chip Size
:Die Center
:1.60x2.00[mm]
unit:[um]
1
2
3
10
9
8
Chip Thickness :260 ±20[um]
4
7
Pad Size
:90x90[um]
5
6
sBLOCK DIAGRAM
VOSC
VCC
XT1
XT2
OSC
BUFFER
AMP
HIGH
PASS
FILTER
LIMITER
AMP
T2
T1
VVC
GND
OUTPUT
BUFFER
FOUT2
FOUT1
Version 3.6 2003/08/22 ( 1 / 3 )