XC2311
Series
VCXO ICs with Built-in Variable Capacitor
ETR1408_005
■GENERAL
DESCRIPTION
The XC2311 Series is VCXO (Voltage Controlled Crystal Oscillator) ICs with built-in variable capacitor diode.
With the originally developed variable capacitor diode and a constant-voltage circuit built-in, the series achieves the wide
variable frequency range, frequency stability to supply voltage and low power consumption.
By combining with the AT-cut crystal oscillator, the ultra small and highly accurate Frequency Voltage Controlled Crystal
Oscillator of 16 to 50MHz can be formed.
The small SOT-26, USP-6C, and SOP-8 packages make high density mounting possible.
■APPLICATIONS
●VCXO
modules
●Communication
equipment
■FEATURES
Supply Voltage Range
Output Frequency Range
: 2.6V ~ 3.6V
: 16MHz ~ 50MHz
(V2B0 = 16MHz~36MHz,
V3B0 = 30MHz~50MHz)*
Pull Range
: more than
±110ppm
(XC2311V2B0xx,
V
C
= 1.65V±1.35V)
Output Waveform Symmetry
: 50% /±5 %
Operating Ambient Temperature
: - 40℃ ~ +85℃
Supply Current
: 3mA (TYP.)
(when VDD is 3.6V, 27MHz
and output is enable)
CMOS Output
Ultra Small Packages
Chip Form
details.
: SOT-26, USP-6C, SOP-8
: Chip size 1000 x 750μm
* Please refer to the Electrical Characteristics for versions’
■CHIP
PAD LAYOUT
■PAD
COORDINATE
PAD NAME
VC
OE (/INH)
VSS
OUT(Q)
VDD
X2
X1
PAD No.
1
2
3
4
5
6
7
X (μm)
359
359
359
-359
-359
-132
132
Y (μm)
-244
44
244
179
-244
-244
-244
* The coordinate origin of XY-coordinate is a chip center.
Unit (μm)
Pad Size
Chip Thickness
80 x 80
μm
200 + 10
μm
1/12
XC2311
Series
■PIN
CONFIGURATION
X1
X2
X1
VC
V
DD
X2
OE(INH)
NC
V
DD
V
SS
OUT(Q)
OUT(Q)
V
SS
VC
X1
VC
OE(INH)
V
SS
(TAB)
V
DD
X2
OUT(Q)
SOP-8
(TOP VIEW)
SOT-26
(TOP VIEW)
USP-6C
(BOTTOM VIEW)
■PIN
ASSIGNMENT
●SOP-8
PIN NUMBER
1
2
3
4
5
6
7
8
PIN NAME
X1
V
C
OE (/INH)
V
SS
OUT (Q)
NC
V
DD
X2
I/0
I
I
I
-
0
-
-
FUNCTIONS
Crystal Oscillator Connection (Input)
Oscillation Frequency Control Input
Output Control Input
(-) Ground
Output
No Connection
(+) Power Supply
Crystal Oscillator Connection (Output)
●SOT-26
1
2
3
4
5
6
Note : No OE (/INH) function available.
PIN NAME
X1
X2
V
DD
OUT (Q)
V
SS
V
C
I/0
I
-
0
-
I
FUNCTIONS
Crystal Oscillator Connection (Input)
Crystal Oscillator Connection (Output)
(+) Power Supply
Output
(-) Ground
Oscillation Frequency Control Input
PIN NUMBER
●USP-6C
PIN NUMBER
1
2
3
TAB
4
5
6
PIN NAME
X1
V
C
OE (/INH)
V
SS
OUT (Q)
V
DD
X2
I/O
I
I
I
-
0
-
-
FUNCTIONS
Crystal Oscillator Connection (Input)
Oscillation Frequency Control Input
Output Control Input
(-) Ground
Output
(+) Power Supply
Crystal Oscillator Connection (Output)
■OE
(/INH), OUT (Q) PIN FUNCTION
OE (/INH)
“H” or OPEN
“L”
OUT (Q)
Clock Output
High Impedance
2/12
XC2311
Series
■PRODUCT
INFORMATION
●Ordering
Information
XC2311①②③④⑤⑥
DESIGNATOR
①
②
③
④
DESCRIPTION
VCXO product
Oscillation Frequency
-
-
SYMBOL
V
2
3
B
0
S
M
E
C
R
L
T
: Fixed number
: 16MHz ~ 36MHz
: 30MHz ~ 50MHz
: Fixed number
: Fixed number
DESCRIPTION
⑤
Package
⑥
Device Orientation
: SOP-8
: SOT-26
: USP-6C
: Chip form
: Embossed tape, standard feed
: Embossed tape, reverse feed
: Chip tray
3/12
XC2311
Series
■BLOCK
DIAGRAM
Rf
Constant
Voltage Vreg
Source
Level
Shifter
Rd
Cpg
Cpd
Rin=Rvc1+Rvc2
Rv1
Rv2
Rvc2
Rvc1
Variable
Capacitor 2
CV2
Output Buffer
(Divider)out
Inhibit
OUT(Q)
X2
X1
Variable
Capacitor 1
CV1
V
DD
V
SS
Vc
OE
(/INH)
■ABSOLUTE
MAXIMUM RATINGS
V
SS
=0V, Ta=25
O
C
PARAMETER
Supply Voltage
Input Voltage
Output Voltage
Output Current
SOP-8
Power Dissipation
SOT-26
USP-6C
Operating Ambient Temperature
Storage Temperature Range
SYMBOL
V
DD
V
IN
V
OUT
I
OUT
Pd
Topr
Tstg
RATINGS
MIN.
V
SS
-0.5
V
SS
-0.5
V
SS
-0.5
-
TYP.
-
-
-
-
300
250
100
-
-
MAX.
+7.0
V
DD
+0.5
V
DD
+0.5
30
UNIT
V
V
V
mA
mW
-40
-55
+85
+125
℃
℃
■RECOMMENDED
OPERATING CONDITIONS
●XC2311VxB0
Series
Recommended Operating Conditions : V
SS
= 0V, Ta = -40℃ ~ +85℃
Unless otherwise stated, the item is common in XC2311V2B0 or XC2311V3B0.
PARAMETER
Operating Supply Voltage
“H” Level Input Voltage
“L” Level Input Voltage
Input Voltage
Control Voltage
Oscillation Frequency Range
SYMBOL
V
DD
V
IH
V
IL
V
IN
VC
f0
CONDITIONS
-
OE (/INH) Pin
OE (/INH) Pin
OE (/INH) Pin
2.6V < V
DD
< 3.6V
XC2311V2B0
XC2311V3B0
RATINGS
MIN.
2.6
0.7 x V
DD
-
V
SS
0
16
30
TYP.
3.3
-
-
-
-
-
-
MAX.
3.6
-
0.3 x V
DD
V
DD
V
DD
+ 1.0
36
50
UNITS
V
V
V
V
V
MHz
MHz
4/12
XC2311
Series
■ELECTRICAL
CHARACTERISTICS
●XC2311VxB0
Series
Condition : Unless otherwise stated, V
SS
= 0V, V
DD
= 3.3V, VC = 1.65V, Ta = 25℃ and the item
is common in XC2311V2B0 or XC2311V3B0.
RATINGS
MIN.
±110
±100
-
-
-
-
V
DD
-0.4
PARAMETER
Pull Range
Operating Supply Current
Supply Current Disable
(*3)
SYMBOL
fcntr
CONDITIONS
Vc = 1.65±1.35V (*1), XC2311V2B0, 27MHz
Vc = 1.65±1.35V (*1), XC2311V3B0, 47MHz
TYP.
-
-
3.0
6.0
1.0
1.5
-
-
2.5
-
50
-
-
-
4.5
3.0
4.5
3.0
-
-
1.5
100
16
50
15
-
MAX.
-
-
5.0
12.0
2.0
3.0
-
0.4
5.0
10
55
-
10
-
-
-
-
-
100
100
-
-
19
60
30
15
UNITS
ppm
I
DD1
XC2311V2B0, V
DD
=3.6V, fosc=27MHz, CL=15pF
XC2311V3B0, V
DD
=3.6V, fosc=47MHz, CL=15pF
mA
I
DD2
V
OH
V
OL
Rup
Ioz
DUTY
Rin
Lin
fc
tr
fosc=27MHz, CL=15pF, OE(/INH)= “L”
fosc=47MHz, CL=15pF, OE(/INH)= “L”
mA
V
V
MΩ
⎧A
%
kΩ
%
kHz
ns
“H” Level Output Voltage
“L” Level Output Voltage
Input Pull-up Resistance
Output Off Leak Current
(*2)
(*3)
I
OH
= -5mA
I
OL
= 5mA
OE(/INH) = 0V
V
DD
= 3.6V, OE(/INH) = “L”
CL = 15pF
Between the V
C
and the Ground pins
Vc = 1.65±1.35V
(*1)
Vc = 1.65±1.35V
(*1)
-
1.0
-
45
100
-
15
-
-
-
-
-
-
-
-
13
40
-
-
Output Waveform Symmetry
Input Resistance
Pull Range Linearity
(*2)
Cut-off Frequency at
Modulation
(*2)
, Sine wave input
Output Rise Time
(*2)
Output Fall Time
(*2)
Output Enable Delay Time
(*2), (*3)
XC2311V2B0, CL = 15pF (from 10% to 90%)
XC2311V3B0, CL = 15pF (from 10% to 90%)
tf
XC2311V2B0, CL = 15pF (from 10% to 90%)
XC2311V3B0, CL = 15pF (from 10% to 90%)
ns
tpe
tpd
tstart
Rf
Cpg
Cpd
CL
-
-
-
-
-
-
XC2311V2B0, CMOS level
XC2311V3B0, CMOS level
ns
ns
ms
kΩ
pF
pF
pF
Output Disable Delay Time
(*2), (*3)
Oscillation Start-up Time
(*2)
Feedback Resistance
(*2)
DC Block Capacity
(*2)
DC Block Capacity
(*2)
Output Load Capacity
(*2)
NOTE:
*1: Crystal Oscillator Equivalent Parameter,
γ=
CO/C1< 300
*2: The value shown above indicates a design value.
*3: For the SOT-26 package products, the OE (/INH) pin is fixed by an internal pull-up.
No OE (/INH) function available.
5/12
Embedded System
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