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PDF NJU6221 Data sheet ( Hoja de datos )
| Número de pieza | NJU6221 | |
| Descripción | 1.8V Operating Voltage Fundamental Quartz Crystal Oscillator IC | |
| Fabricantes | New Japan Radio | |
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NJU6221 Series
1.8V Operating Voltage Fundamental
Quartz Crystal Oscillator IC with Input Tolerant Function
GENERAL DESCRIPTION
The NJU6221 series is a C-MOS quartz crystal oscillator IC
realized excellent frequency stability for fundamental (up to
60MHz) oscillation, and consists of an oscillation amplifier, a
6-stage divider, a 3-state output buffer, a built-in LDO and a
input tolerant circuit. The operating voltage is from 1.62V to
3.63V, and the LDO holds down the characteristic change of
the oscillation amplifier for operating voltage variation, and
has been stabilized oscillation frequency. ( ±1ppm@VDD±10%)
The 6-stage divider generates only one frequency selected
at the factory shipment of f0, f0/2, f0/4, f0/8, f0/16, f0/32 and
f0/64 internal circuits is output. The 3-state output buffer is
C-MOS compatible.
The input tolerant circuit ensures that 0 to 3.63 V can be
applied to CONT terminal without regard to the supply voltage.
The oscillation stopping current is very low stand-by mode,
therefore, it is suitable for the portable items of the
communication equipment and the like.
PACKAGE OUTLINE
NJU6221XxC-V
FEATURES
Maximum Oscillation Frequency 60MHz(Fundamental)
Frequency Stability
Wide Operating Voltage
±1ppm@VDD±10%
1.62 to 3.63V
Low Operating Current
2mA typ.@60MHz/3.3V
6-Stage Divider
Maximum Divider f0/64
Built-in LDO
Input Tolerant Circuit
0 to 3.63V@CONT Term.
Oscillation Stop and Output Stand-by Function
3-State Output Buffer
Variable Pull-up Resistance on-Die (CONT: Pull-up Resistance large at the Stand-by mode.)
Oscillation Capacitors Cg and Cg on-Die
C-MOS Technology
Package Outline
Die/Wafer
BLOCK DIAGRAM
VDD
VSS
Regulator
XTO
XTI
Cg
CONT
Input
Tolerant
Circuit
Rf
Level
Shifter
Cd
OSC
Detector
Divider
3-State
Buffer
FOUT
2016/6/30 ( 1 / 6 )
1 page  
NJU6221 Series
(VDD=1.62 to 3.63V, VSS=0V, Ta=+25°C)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNIT
Feedback Resistance
Rf
545 kΩ
Internal Capacitor
Cg fosc=60MHz
Cd fosc=60MHz
7.5 pF
8.5 pF
Oscillation Frequency
fosc Recommendation
Note1)
60 MHz
Output Signal
Symmetry
SYM
CL=15pF, @VDD/2
45 50 55 %
Output Signal Rise
Time
tr
CL=15pF
0.1VDD to 0.9VDD
VDD=1.8V
VDD=2.5V
VDD=3.3V
3.2 5.0 ns
2.2 3.7 ns
1.8 3.0 ns
Output Signal Fall
Time
tf
CL=15pF
0.9VDD to 0.1VDD
VDD=1.8V
VDD=2.5V
VDD=3.3V
Output Disable time
tPOZ CL=15pF, RL=1kΩ
3.2 5.0 ns
2.2 3.7 ns
1.8 3.0 ns
100 ns
Output Enable Time
tPZO CL=15pF
1 ms
Note1) The oscillation frequency range has used NJRC’s standard crystal for measurement. However it is not
guaranteed. (Refer to EXAMPLE OF CRYSTAL PARAMETERS FOR MEASUREMENT CIRCUITS)
EXAMPLE OF CRYSTAL PARAMETERS FOR MEASUREMENT CIRCUITS
L1 C1 R1
C0
f[MHz]
60
R1[Ω]
31.18
L1[mH]
3.75
C1[fF]
1.87
C0[pF]
0.92
MEASUREMENT CIRCUITS
(1)Operating Current(CL=0pF), Output Signal Symmetry(CL=15pF), Output Signal Rise/Fall Time (CL=15pF)
VDD
XTI FOUT
XT
CONT
IDD : Open
VSS
ISTB : Short
0. 1µF
CL=15pF
H
tr
1/2VDD
L
90%
50%
10%
tf
2016/6/30 ( 5 / 6 )
5 Page | ||
| Páginas | Total 6 Páginas | |
| PDF Descargar | [ Datasheet NJU6221.PDF ] | |
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