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NJU6343
Product Specification
50MHz VCXO IC
sGENERAL DESCRIPTION The NJU6343 is a single chip C-MOS IC for VCXO that consists of an oscillation amplifier and 3-state output buffer. The NJU6343 integrates all components used in VCXO module, and there is no need for completing VCXO module to prepare any external components except a quartz crystal. It can vary its output frequency by controlling voltage at VC terminal. The oscillation amplifier is realized very low stand-by current using NAND circuit. The 3-state output buffer is C-MOS compatible. sFEATURES qOperating Voltage 2.7 to 3.6V qMaximum Oscillation Frequency 50MHz(T.B.D.) qFrequency Pulling Range ±100ppm qLow Operating Current qHigh Fan-out IOH/IOL= T.B.D @3.0V qOscillation Stop and Output Stand-by Function q3-State Output Buffer qA Variable Capacitor on-chip qPackage Outline Chip qC-MOS Technology sCOORDINATES No 1 Pad Name X Y
sPACKAGE OUTLINE
NJU6343C
sPAD LOCATION
2 3 4
CONT XT
XT VSS FOUT VC VDD
Starting Point:Chip Center Unit[um] Chip Size:1.6x1.6mm Thin-Chip Thickness:260±20um Pad Size:90x90um sBLOCK DIAGRAM
XT
XT
Rf
VDD
VSS
VC
Cg
Cd
3 − STATE BUFFER
FOUT
CONT
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NJU6343
sTREMINAL DESCRIPTION
SYMBOL
CONT
FUNCTION Oscillation and 3-state Output Buffer Control FOUT CONT Frequency Output corresponding to Control H or OPEN Voltage. L Oscillation Stop and High impedance Output Quartz Crystal Connecting Terminals VSS=0V Frequency Output Frequency Control VDD=3.0V (Ta=25°C)
XT XT VSS FOUT VC VDD
sABSOLUTE MAXIMUM RATINGS
PARAMETER SYMBOL RATING UNIT Supply Voltage VDD -0.5 to +7.0 V Control Voltage VC VSS-0.5 to VDD+0.5 V Input Voltage VIN VSS-0.5 to VDD+0.5 V Output Voltage VO -0.5 to VDD+0.5 V mA Input Current IIN ±10 Output Current IO mA ±25 Operating Temperature Range Topr -40 to +85 °C Storage Temperature Range Tstg -55 to +125 °C Note1) If the supply voltage(VDD) is less than 7.0V, the input voltage must not over the VDD level though 7.0V is limit specified. Note2) Decupling capacitor should be connected between VDD and VSS due to the stabilized operation for the circuit.
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NJU6343
(Ta=25°C) CONDITIONS MIN 2.7 TYP MAX 3.6 UNIT V SYMBOL VDD
sELECTRICAL CHARACTERISTICS
PARAMETER Operating Voltage
sELECTRICAL CHARACTERISTICS
(VDD=3.0, VC=VDD/2, Ta=25°C) CONDITIONS fosc=16MHz, VC=VDD/2, CL=15pF CONT =VSS, VC=VDD/2, No load CONT XT=VSS, VC=VDD/2, No load Note3) 2.4 0 T.B.D T.B.D 10 1.8 MIN TYP T.B.D 2 MAX 5 1 3.0 0.6 UNIT mA uA uA V V mA mA uA uA uA kΩ pF V ppm MHz 50 50 3 3 3 3 55 55 6 6 6 6 200 200 % ns ns ns ns
PARAMETER Operating Current Oscillation Stopping Current Stand-by Current Input Voltage Output Current Input Current 3-state Off Leakage Current Feedback Resistance Internal Capacitor Control Voltage Frequency Pulling Range Maximum Oscillation Frequency Output Signal Symmetry Output Signal Rise Time Output Signal Fall Time Output Disable time Output Enable Time Note3)
SYMBOL IDD ISTB Ist VIH VIL IOH IOL IIN IOZ Rf Cg/Cd VC ∆fC FMAX SYM tr tf TPLZ TPZL
VOH=2.7V VOL=0.3V CONT =0.8VDD CONT =0.2VDD CONT =VSS, VC=VDD/2, FOUT= VDD or VSS Preliminary fosc=16MHz
15 3.0
±0.1
T.B.D T.B.D 0 VDD +100 -100 50
VC=0 to VDD
CL=15pF, VC=VDD/2, @VDD/2 CL=30pF, VC=VDD/2, @VDD/2 CL=15pF, VC=VDD/2, 10% to 90% CL=30pF, VC=VDD/2, 10% to 90% CL=15pF, VC=VDD/2, 90% to 10% CL=30pF, VC=VDD/2, 90% to 10% CL=15pF, VC=VDD/2, RUP=10kΩ CL=15pF, VC=VDD/2, RUP=10kΩ
45 45
Excluding input current on CONT Terminal.
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NJU6343
sMEASURMENT CIRCUITS
(1)Output Signal Symmetry(CL=15pF, VC=1/2VDD)
Pulse Generator
1000pF XT 50Ω
VDD FOUT CL=15pF H L 1/2VDD
VSS
(2)Output Signal Rise/Fall Time(CL=15pF, VC=1/2VDD)
Pulse Generator
1000pF XT 50Ω
VDD FOUT CL=15pF tr tf
90% 50% 10%
VSS
(3)Output Disable/Enable Time(CL=15pF, RUP=10kΩ, VC=1/2VDD)
VDD XT Pulse Generator 50Ω CONT VSS FOUT
RUP=10kΩ
CONT
0.2VDD TPLZ
0.8VDD TPZL VOL VOH
CL=15pF FOUT
[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.
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