PulseCore ASM3P2187AG-08TR Spread spectrum clock generator for mobile application Datasheet

ASM3P2187A/B
June 2006
rev 0.1
Spread Spectrum Clock Generator for Mobile Applications
Product Description
Features
• Generates a 4X EMI optimized clock signal at the
Output.
• Input frequency
The ASM3P2187A/B is a versatile spread spectrum
frequency modulator designed specifically for a wide
: 12.5MHz to 20MHz
range of clock frequencies. The ASM3P2187A/B reduces
• Output frequency : 50MHz to 80MHz
electromagnetic interference (EMI) at the clock source,
• REFOUT is same as input frequency
allowing system wide reduction of EMI of
• Selectable Centre Spread :
dependent
± 0.5%, ± 1.0%
signals.
The
all clock
ASM3P2187A/B
allows
significant system cost savings by reducing the number of
• Low power CMOS design
circuit board layers ferrite beads,
• 3.3V ± 0.3V Operating Voltage
traditionally required to pass EMI regulations.
• Available in Industrial Temperature range
ASM3P2187A device has an option of Spread ON/OFF
(-40to 85°C)
shielding that are
and ASM3P2187B device has Powerdown option
• Available in 8-pin TSSOP
Applications
• Drop-in replacement for MB88155-412 Device
The ASM3P2187A/B is targeted towards mobile phones,
mobile audio players and PDAs.
Block Diagram
VDD
SEL SSON/PDB
PLL
Modulation
XIN
XOUT
Crystal
Oscillator
Frequency
Divider
Feedback
Divider
Phase
Detector
Loop
Filter
VCO
Output
Divider
ModOUT
REFOUT
VSS
PulseCore Semiconductor Corporation
1715 S. Bascom Ave Suite 200, Campbell, CA 95008 • Tel: 408-879-9077 • Fax: 408-879-9018
www.pulsecoresemi.com
Notice: The information in this document is subject to change without notice.
ASM3P2187A/B
June 2006
rev 0.1
Pin Configurations
8
VDD
7
ModOUT
3
6
VSS
SEL 4
5
REFOUT
XIN
8
VDD
7
ModOUT
3
6
VSS
SEL 4
5
REFOUT
XIN
1
XOUT 2
SSON
ASM3P2187A
1
XOUT 2
ASM3P2187B
PDB
Pin Description
Pin#
Pin Name
Type
Description
1
XIN
I
2
XOUT
O
3
SSON / PDB*
I
Modulation enable pin/ Power down pin. Has an Internal pull up resistor
Crystal connection or external reference frequency input. This pin has dual
functions. It can be connected either to an external crystal or an external reference
clock.
Crystal connection. If using an external reference, this pin must be left
unconnected.
4
SEL
I
Modulation rate setting pin
Centre spread, SEL = “L” : Frequency Deviation ± 0.5%
Centre spread, SEL = “H” : Frequency Deviation ± 1.0%
Has an Internal pull up resistor.
5
REFOUT
O
Non-modulated clock output pin. The Frequency is same as input
frequency. This pin becomes to “L” at power-down.
6
VSS
P
Ground Connection. Connect to system ground.
7
ModOUT
O
Modulated clock output pin
This pin becomes to“L” at power-down.
8
VDD
P
Power Supply Voltage Pin. Connect to +3.3V.
* SSON Pin is available in ASM3P2187A Device and PDB Pin is available in ASM3P2187B Device
Spread Spectrum Clock Generator for Mobile Applications
Notice: The information in this document is subject to change without notice.
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ASM3P2187A/B
June 2006
rev 0.1
Modulation Enable Setting Table
SSON
Modulation
L
No Modulation
H
Modulation
Power down Status Table
PDB
Status
L
Power Down Status
H
Operating Status
Spread Range Selection Table
SEL
Spreading Range
L
± 0.50%
H
± 1.00%
Absolute Maximum Ratings
Symbol
Rating
Unit
-0.5 to +4.6
V
Input Voltage pin with respect to Ground
VSS-0.5 to VSS+0.5
V
VOUT
Output Voltage pin with respect to Ground
VSS-0.5 to VSS+0.5
V
TSTG
Storage temperature
-55 to +125
°C
TA
Operating temperature
-40 to +85
°C
Ts
Max. Soldering Temperature (10 sec)
260
°C
TJ
Junction Temperature
-40 to +125
°C
2
KV
VDD
VIN
TDV
Parameter
Supply Voltage pin with respect to Ground
Static Discharge Voltage
(As per JEDEC STD22- A114-B)
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.
Spread Spectrum Clock Generator for Mobile Applications
Notice: The information in this document is subject to change without notice.
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ASM3P2187A/B
June 2006
rev 0.1
DC Electrical Characteristics
( Test condition: All parameters are measured at -40°C to +85°C, 3.3V ± 0.3V , VSS =0V , unless otherwise stated)
Symbol
Parameter
Min
Typ
Max
Unit
VIL
Input low voltage
VSS – 0.3
-
0.8
V
VIH
Input high voltage
2.0
-
VDD+ 0.3
V
IIL
Input low current
-
-
-35
µA
IIH
Input high current
-
-
+35
µA
IXOL
XOUT output low current ( VXOL @ 0.4V, VDD = 3.3V)
-
3
-
mA
IXOH
XOUT output high current ( VXOH @ 2.5V, VDD = 3.3V)
-
3
-
mA
VOL
Output low voltage
VSS
-
0.4
V
VOH
Output high voltage
VDD-0.5
-
VDD
V
ICC
Dynamic supply current , TBD MHz Output, no load
TBD
TBD
mA
IDD
Static supply current standby mode
TBD
VDD
tON
For ModOUT, IOL = 4mA
For REFOUT, IOL = 3mA
For ModOUT, IOH = -4mA
For REFOUT, IOH = -3mA
Operating voltage
3.3
3.3
3.6
V
-
2
5
mS
For ModOUT
-
TBD
-
Ω
For REFOUT
-
TBD
-
Ω
-
-
16
pF
12.5MHz to 50MHz
-
-
15
12.5MHz to 50MHz
-
-
15
50MHz to 80MHz
-
-
7
Power up time (first locked clock cycle after power up)
Clock output
impedance
ZOUT
CIN
Input Capacitance, Ta=25°C, VDD=VIN=0V, f =1MHz
REFOUT
CL
Load Capacitance
uA
ModOUT
pF
AC Electrical Characteristics
( Test condition: All parameters are measured at -40°C to +85°C, 3.3V ± 0.3V , VSS =0V , unless otherwise stated)
Symbol
fIN
fOUT
tLH*
tHL*
tJC
tD
MF
Parameter
Min
Typ
Max
Unit
TBD
20
80
20
-
MHz
ModOUT
REFOUT
Output rise time ( Measured from 0.8V to 2.0V )
12.5
50
12.5
-
MHz
-
TBD
-
nS
-
-
TBD
pS
40
50
60
%
Input frequency
Output frequency
Output fall time ( Measured from 2.0V to 0.8V )
Jitter (Cycle to cycle), Ta=25°C and VDD=3.3V
No Load Capacitance
Output duty cycle
Modulation Frequency ,
Input Frequency =12.5MHz
32.4
nS
KHz
*tLH and tHL are measured with a capacitive load of 15pF
Spread Spectrum Clock Generator for Mobile Applications
Notice: The information in this document is subject to change without notice.
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ASM3P2187A/B
June 2006
rev 0.1
OUT PUT CLOCK DUTY CYCLE (tD, tDCR = tb / ta )
ta
tb
1.5V
ModOUT,
REFOUT
INPUT FREQUENCY (fIN = 1/tIN )
tin
0.8VDD
XIN
CYCLE -- CYCLE JITTER (tJC = [tn -tn + 1])
ModOUT
tn
tn+1
Note: Cycle-cycle jitter indicates the difference between a certain cycle and the immediately
succeeding (or preceding) cycle
Spread Spectrum Clock Generator for Mobile Applications
Notice: The information in this document is subject to change without notice.
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ASM3P2187A/B
June 2006
rev 0.1
Typical Crystal Oscillator Circuit
R1 = 510Ω
C1 = 27 pF
C2 =27 pF
Typical Crystal Specifications
Fundamental AT cut parallel resonant crystal
Nominal frequency
14.31818MHz
Frequency tolerance
± 50 ppm or better at 25°C
Operating temperature range
-25°C to +85°C
Storage temperature
-40°C to +85°C
Load capacitance
18pF
Shunt capacitance
7pF maximum
ESR
25Ω
Spread Spectrum Clock Generator for Mobile Applications
Notice: The information in this document is subject to change without notice.
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ASM3P2187A/B
June 2006
rev 0.1
Package Information
Mechanical Package Outline 8-Pin TSSOP
H
E
D
A2
A
C
θ
e
A1
L
B
Dimensions
Symbol
Inches
Min
Millimeters
Max
A
Min
Max
0.043
1.10
A1
0.002
0.006
0.05
0.15
A2
0.033
0.037
0.85
0.95
B
0.008
0.012
0.19
0.30
c
0.004
0.008
0.09
0.20
D
0.114
0.122
2.90
3.10
E
0.169
0.177
4.30
4.50
e
0.026 BSC
0.65 BSC
H
0.252 BSC
6.40 BSC
L
0.020
0.028
0.50
0.70
θ
0°
8°
0°
8°
Note: Controlling dimensions are millimeters
TSSOP – 0.034 grams unit weight
Spread Spectrum Clock Generator for Mobile Applications
Notice: The information in this document is subject to change without notice.
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ASM3P2187A/B
June 2006
rev 0.1
Ordering Codes
Part Number
Marking
Package Type
Temperature
ASM3P2187AG-08TT
3P2187AG
8-Pin TSSOP, TUBE, Green
Commercial
ASM3P2187AG-08TR
3P2187AG
8-Pin TSSOP, TAPE & REEL, Green
Commercial
ASM3I2187AG-08TT
3I2187AG
8-Pin TSSOP, TUBE, Green
Industrial
ASM3I2187AG-08TR
3I2187AG
8-Pin TSSOP, TAPE & REEL, Green
Industrial
ASM3P2187BG-08TT
3P2187BG
8-Pin TSSOP, TUBE, Green
Commercial
ASM3P2187BG-08TR
3P2187BG
8-Pin TSSOP, TAPE & REEL, Green
Commercial
ASM3I2187BG-08TT
3I2187BG
8-Pin TSSOP, TUBE, Green
Industrial
ASM3I2187BG-08TR
3I2187BG
8-Pin TSSOP, TAPE & REEL, Green
Industrial
Device Ordering Information
A S M 3 P 2 1 8 7 A G - 0 8 T R
R = Tape & Reel, T = Tube or Tray
O = SOT
S = SOIC
T = TSSOP
A = SSOP
V = TVSOP
B = BGA
Q = QFN
U = MSOP
E = TQFP
L = LQFP
U = MSOP
P = PDIP
D = QSOP
X = SC-70
DEVICE PIN COUNT
F = LEAD FREE AND RoHS COMPLIANT PART
G = GREEN PACKAGE, LEAD FREE, and RoHS
PART NUMBER
X= Automotive
I= Industrial
P or n/c = Commercial
(-40C to +125C) (-40C to +85C)
(0C to +70C)
1 = Reserved
2 = Non PLL based
3 = EMI Reduction
4 = DDR support products
5 = STD Zero Delay Buffer
6 = Power Management
7 = Power Management
8 = Power Management
9 = Hi Performance
0 = Reserved
PulseCore Semiconductor Mixed Signal Product
Licensed under U.S Patent Nos 5,488,627 and 5,631,921
Spread Spectrum Clock Generator for Mobile Applications
Notice: The information in this document is subject to change without notice.
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ASM3P2187A/B
June 2006
rev 0.1
PulseCore Semiconductor Corporation
1715 S. Bascom Ave Suite 200
Campbell, CA 95008
Tel: 408-879-9077
Fax: 408-879-9018
www.pulsecoresemi.com
Copyright © PulseCore Semiconductor
All Rights Reserved
Preliminary Information
Part Number: ASM3P2187A/B
Document Version: v0.1
Note: This product utilizes US Patent # 6,646,463 Impedance Emulator Patent issued to PulseCore Semiconductor, dated 11-11-2003
© Copyright 2006 PulseCore Semiconductor Corporation. All rights reserved. Our logo and name are trademarks or
registered trademarks of PulseCore Semiconductor. All other brand and product names may be the trademarks of their
respective companies. PulseCore reserves the right to make changes to this document and its products at any time without
notice. PulseCore assumes no responsibility for any errors that may appear in this document. The data contained herein
represents PulseCore’s best data and/or estimates at the time of issuance. PulseCore reserves the right to change or correct
this data at any time, without notice. If the product described herein is under development, significant changes to these
specifications are possible. The information in this product data sheet is intended to be general descriptive information for
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Spread Spectrum Clock Generator for Mobile Applications
Notice: The information in this document is subject to change without notice.
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