ONSEMI P2084AF-08SR

P2084A
Low Cost Frequency Multiplier
Features
The P2084A can generate a 4x output clock of the input
frequency which allows system cost savings by using an
inexpensive crystal or resonator to achieve high frequency
multiplication.
• Generates 2x and 4x clocks of the input clock
frequency
• Input clock frequency range from 3MHz to 78MHz
• P2084A: 312MHz output clock frequency
• 3.3V operating voltage range
The P2084A provides up to 312MHz output clock
frequencies respectively through the use of the PhaseLock-Loop (PLL) technique which delivers low jitter and
high precision synthesized clocks.
• 10mA output drives
Applications
• External loop filter
• Low Cycle-to-Cycle Jitter
• TTL or CMOS compatible outputs
The P2084A is targeted towards the high frequency CAN
OSC replacement market. Applications include xDSL,
routers, networking, PC peripherals, and embedded
systems.
• Ultra-low power CMOS design
• Available in 8-pin SOIC
Product Description
P2084A is a versatile frequency multiplier that is designed
specifically as cost effective alternatives to the high
precision frequency oscillator.
FS0
Block Diagram
FS1
LF
VDD
PLL
Modulation
XIN / CLKIN
XOUT
Crystal
Oscillator
Frequency
Divider
Feedback
Divider
Phase
Detector
Output
Divider
VCO
ModOUT
VSS
©2010 SCILLC. All rights reserved.
MARCH 2010 – Rev. 1
Publication Order Number:
P2084/D
P2084A
Pin Configuration
XIN / CLKIN
1
XOUT 2
P2084A
8
VDD
7
FS0
FS1
3
6
CLKOUT
LF
4
5
VSS
Pin Description
Pin#
Pin Name
Type
Description
1
XIN / CLKIN
I
Connect to crystal or clock input.
2
XOUT
I
Crystal connection. If using an external reference, this pin must be left unconnected.
3
FS1
I
Digital logic input used to select input frequency range. (See Input Frequency Selection.)
This pin has an internal pull-up resistor.
4
LF
I
External loop filter for the PLL. (See Loop Filter Selection Table for value.)
5
VSS
P
Ground connection. Connect to system ground.
6
CLKOUT
O
Clock output.
7
FS0
I
Digital logic input used to select input frequency range. (See Input Frequency Selection.)
This pin has an internal pull-up resistor.
8
VDD
P
Connect to +3.3V.
Input Frequency Selection
Output Frequency Scaling
FS1
FS0
Input (MHz)
P2084A
0
0
3 to 9
12 to 36
0
1
10 to 19
40 to 76
1
0
20 to 38
80 to 152
1
1
39 to 78
156 to 312
Rev. 1 | Page 2 of 7 | www.onsemi.com
P2084A
Loop Filter Selection Table VDD 3.3V
Input (MHz)
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21 - 22
23 - 24
25 - 26
27 - 28
29 - 30
31 - 32
33 - 34
35 - 36
37 - 38
39 - 42
43 - 46
47 - 50
51 - 54
55 - 58
59 - 62
63 - 66
67 - 70
71 - 74
75 - 78
FS1
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
FS0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
C1(pF)
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
270
Rev. 1 | Page 3 of 7 | www.onsemi.com
C2(pF)
330,000
100,000
100,000
100,000
100,000
100,000
100,000
100,000
100,000
100,000
100,000
100,000
100,000
100,000
100,000
100,000
100,000
100,000
100,000
100,000
100,000
100,000
100,000
100,000
100,000
100,000
100,000
100,000
100,000
100,000
100,000
100,000
100,000
100,000
100,000
100,000
100,000
R1 (ohms)
220
270
390
510
620
820
1,000
330
390
510
560
620
750
820
910
1,000
1,200
330
390
510
560
620
750
820
910
1,000
1,200
330
390
510
560
620
750
820
910
1,000
1,200
P2084A
Output Clock Selection Example
The P2084A can generate 4x from the input reference
frequency. P2084A’s internal crystal oscillator circuits
allow the use of an inexpensive crystal of resonator to
replace expensive can oscillators that are used in
networking, PC peripherals, xDSL, and consumer
applications for high frequency generation. Its input
frequency range is optimized for operation from 3MHz to
78MHz, and its output frequency can deliver up to
312MHz.
VDD
1
XIN
2
XOUT
3
FS1
4
LF
VDD 8
P2084A
VDD
CL
0Ω
0Ω
CL
VDD
0Ω
FS0
7
CLKOUT
6
VSS
5
0Ω
R1
C2
C1
Rev. 1 | Page 4 of 7 | www.onsemi.com
P2084A
Absolute Maximum Ratings
Symbol
Parameter
Rating
Unit
V
VDD
Voltage on any pin with respect to Ground
-0.5 to +4.6
TSTG
Storage temperature
-65 to +125
°C
Ts
Max. Soldering Temperature (10 sec)
260
°C
TJ
Junction Temperature
150
°C
TDV
Static Discharge Voltage (As per JEDEC STD22- A114-B)
2
KV
Note: These are stress ratings only and are not implied for functional use. Exposure to absolute maximum ratings for prolonged periods of time may affect
device reliability.
Operating Conditions
Parameter
Min
Max
Unit
Supply Voltage
3.0
3.6
V
TA
Operating Temperature (Ambient Temperature)
-40
+85
°C
CL
Load Capacitance
15
pF
CIN
Input Capacitance
7
pF
VDD
Description
DC Electrical Characteristics
Symbol
Parameter
Min
Max
Unit
GND-0.3
0.8
V
2.0
VDD+0.3
V
VIL
Input low voltage
VIH
IXOL
Input high voltage
Input low current (internal input pull-up resistor on FS0 and
FS1)
Input high current (internal input pull-up resistor on FS0 and
FS1)
XOUT output low current
IXOH
XOUT output high current
VOL
Output low voltage (VDD = 3.3V, IOL = 20mA)
VOH
Output high voltage (VDD = 3.3V, IOH = 20mA)
IDD
Static supply current
ICC
Typical dynamic supply current (25pF scope probe loading)
5.2 at 3MHz
VDD
Operating voltage
Power-up time (CLOOP = 0.1µF at 16MHz, first locked cycle
after power up)
Clock output impedance (at 16MHz)
3.0
IIL
IIH
tON
ZOUT
AC Electrical Characteristics
Symbol
fIN
1
tLH
tHL
1
Typ
60
µA
0
µA
10
mA
10
mA
0.4
2.5
V
3
Parameter
Min
V
mA
3.3
21.2 at
82MHz
3.6
mA
V
7
mS
28
Ω
Typ
Max
Unit
Input frequency
3
78
MHz
P2084A
12
312
MHz
Output rise time (measured at 0.8V to 2.0V)
1
ns
Output fall time (measured at 2.0V to 0.8V)
1
ns
±200
ps
tJC
Jitter (cycle-to-cycle)
tD
Output duty cycle
45
Note: 1. tLH and tHL are measured into a capacitive load of 15 pF.
Rev. 1 | Page 5 of 7 | www.onsemi.com
50
55
%
P2084A
8-Pin SOIC
H
E
D
A2
A
θ
C
D
e
A1
L
B
Dimensions
Symbol
Inches
Millimeters
Min
Max
Min
Max
A1
0.004
0.010
0.10
0.25
A
0.053
0.069
1.35
1.75
A2
0.049
0.059
1.25
1.50
B
0.012
0.020
0.31
0.51
C
0.007
0.010
0.18
0.25
D
0.193 BSC
4.90 BSC
E
0.154 BSC
3.91 BSC
e
0.050 BSC
1.27 BSC
H
0.236 BSC
6.00 BSC
L
0.016
0.050
θ
0°
8°
0.41
1.27
0°
8°
Rev. 1 | Page 6 of 7 | www.onsemi.com
P2084A
Ordering Codes
Part Number
Marking
Package Type
P2084AF-08ST
ABM
8-pin SOIC, tube, Pb Free
P2084AF-08SR
ABM
8-pin SOIC, tape & reel, Pb Free
Qty per reel
Temperature
0°C to +70°C
2500
0°C to +70°C
A “microdot” placed at the end of last row of marking or just below the last row toward the center of package indicates Pb-free
Licensed under US patent #5,488,627 and #5,631,920.
Advance datasheet. Specification subject to change without notice.
Note: This product utilizes US Patent #6,646,463 Impedance Emulator Patent issued to PulseCore Semiconductor, dated 11-11-2003.
ON Semiconductor and
are registered trademarks of Semiconductor Components Industries, LLC (SCILLC). SCILLC reserves the right to make changes
without further notice to any products herein. SCILLC makes no warranty, representation or guarantee regarding the suitability of its products for any particular
purpose, nor does SCILLC assume any liability arising out of the application or use of any product or circuit, and specifically disclaims any and all liability,
including without limitation special, consequential or incidental damages. “Typical” parameters which may be provided in SCILLC data sheets and/or
specifications can and do vary in different applications and actual performance may vary over time. All operating parameters, including “Typicals” must be
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