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NJU6343
PRELIMINARY
50MHz VCXO IC
sGENERAL DESCRIPTION The NJU6343 is VCXO IC up to 50MHz, which consists of an oscillation amplifier, internal variable capacitor, divider, and 3-state output buffer. The pull range is 100ppm to use internal variable capacitor only, depend on the external crystal parameters. The oscillation amplifier is realized very low standby current using NAND circuit. The 3-state output buffer is C-MOS compatible and up to 30pF load. sFEATURES qOperating Voltage 3.0 to 3.6V qMaximum Oscillation Frequency 50MHz qFrequency Pulling Range 100ppm qLow Operating Current qHigh Fan-out IOH/IOL=6mA @3.3V qOscillation Stop and Output Stand-by Function q3-State Output Buffer qInternal Variable Capacitor qPackage Outline Thin-Chip qC-MOS Technology sLINE-UP TABLE Type No. NJU6343 A FOUT f0 Internal Connect -- Cg/Cd 23/23pF sPACKAGE OUTLINE
NJU6343AC-D
sPAD LOCATION Thin-Chip VC CONT XT XT VSS FOUT VDD
sPAD CONFIGURATION No 1 2 3 4 5 6 7 Pad Name CONT XT XT VSS FOUT VDD VC X -400 -400 -400 -235 400 400 -10 Y 215 -75 -300 -300 -300 200 300
Starting Point:Chip Center Unit[um] Chip Size:1.1x0.9mm Thin-Chip Thickness(-D):20020um Pad Size:90x90um Note1) Substrate: VDD level sBLOCK DIAGRAM
XT
XT
Rf
VDD
VSS
Vc
Cg Cgv
Cd
Cdv
3-STATE BUFFER
FOUT
CONT
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NJU6343
sTERMINAL DESCRIPTION SYMBOL FUNCTION CONT Oscillation and 3-state Output Buffer Control CONT FOUT H or OPEN Output frequency f0 L Oscillation Stop and High impedance Output XT XT VSS FOUT VC VDD Quartz Crystal Connecting Terminals VSS=0V Frequency Output Frequency Control VDD=3.3V
sABSOLUTE MAXIMUM RATINGS (Ta=25C) PARAMETER SYMBOL RATING UNIT Supply Voltage VDD -0.5 to +7.0 V Input Voltage VIN VSS-0.5 to VDD+0.5 V Output Voltage VO -0.5 to VDD+0.5 V Input Current IIN mA 10 Output Current IO mA 25 Operating Temperature Range Topr -40 to +85 C Storage Temperature Range Tstg -55 to +125 C Note2) If the supply voltage(VDD) is less than 7.0V, the input voltage do not over the VDD level. Note3) Decupling capacitor should be connected between VDD and VSS due to the stabilized operation for the circuit.
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NJU6343
sELECTRICAL CHARACTERISTICS PARAMETER Operating Voltage SYMBOL VDD CONDITIONS MIN 3.0 TYP 3.3 MAX 3.6 (Ta=25C) UNIT V
PARAMETER Operating Current Oscillation Stopping Current Stand-by Current Input Voltage Output Current Input Current Control Input Voltage Control Input Current 3-state Off Leakage Current Feedback Resistance Internal Capacitor
SYMBOL IDD ISTB Ist VIH VIL IOH IOL IIN VC IVC IOZ Rf Cg/Cd Cgv/Cdv
CONDITIONS Type A, fosc=20MHz, CL=15pF CONT=VSS, No load CONT=XT=VSS, No load Note4)
(VDD=3.3V, VC=VDD/2, Ta=25C) MIN TYP MAX UNIT 5 mA 2 2.3 0 6 6 10 1.8 0 5 1 3.3 1.0 uA uA V V mA mA uA uA V uA uA k pF pF pF MHz 100 45 45 10 50 50 2.5 4.0 2.5 4.0 55 55 5.0 8.0 5.0 8.0 150 150 10 ppm % % ns ns ns ns ms
VOH=2.97V VOL=0.33V CONT=0.8VDD CONT=0.2VDD VC=0 to VDD CONT=VSS, FOUT=VDD or VSS fosc=20MHz fosc=20MHz, VC=0V fosc=20MHz, VC=VDD
15 3.0 VDD 1 0.1
Note5) Note5) 50
255 23/23 10/10 4/4
Maximum Oscillation FMAX Frequency Frequency Pulling f/f0 VC=0 to VDD Range VC=0.1VDD to 0.9VDD Frequency Linearity Lin Output Signal CL=15pF, @VDD/2 SYM Symmetry CL=30pF, @VDD/2 Output Signal Rise CL=15pF, 0.1VDD to 0.9VDD tr Time CL=30pF, 0.1VDD to 0.9VDD Output Signal Fall CL=15pF, 0.9VDD to 0.1VDD tf Time CL=30pF, 0.9VDD to 0.1VDD Output Disable time tPLZ CL=15pF, RUP=10k, VC=0V Output Enable Time tPZL CL=15pF, RUP=10k, VC=0V Oscillation Starting tSTART CL=15pF, Vtrigger=0.9V Note4) Excluding input current on CONT=VSS Terminal. Note5) The Cgv and Cdv is design value.
1.5
sSTANDARD CRYSTAL PARAMETERS FOR ELECTRICAL MEASUREMENTS
L1 C1 R1
f[MHz] 20
R1[] 16.9
L1[mH] 4.7
C1[fF] 13.6
C0[pF] 3.1
227
C0
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NJU6343
sMEASUREMENT CIRCUITS (1)Operating Current / Output Signal Symmetry / Output Signal Rise & Fall Time (CL=15pF)
VDD XT XT VC VDD/2 FOUT CL=15pF H L 1/2VDD
VSS
0.9 50% 0.1 tr tf
(2)Output Disable & Enable Time (CL=15pF, RUP=10k, VC=0V)
VDD Pulse Generator 50 FOUT XT VC CONT VSS
RUP=10k CONT CL=15pF FOUT 0.2VDD tPLZ VOL
0.8VDD tPZL VOH
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NJU6343
sTYPICAL CHARACTERISTICS (1)Frequency Pulling Range 1 (VDD =3.3V, f0=20MHz, R1=16.9, L1=4.7mH, C1=13.6fF, C0=3.1pF, =227)
150 100 f/f0 [ppm] 50 0 -50 -100 -150 -200 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 VC [V]
(2)Frequency Pulling Range 2 (VDD =3.3V, f0=21MHz, R1=13.1, L1=7.4mH, C1=7.8fF, C0=1.8pF, =238)
150 100 f/f0 [ppm] 50 0 -50 -100 -150 -200 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 VC [V]
[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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