ASM3I2110AF-20-JT [PULSECORE]
Clock Generator, 51MHz, CMOS, PDSO20, 0.150 INCH, LEAD FREE, SSOP-20;
| 型号： | ASM3I2110AF-20-JT |
| 厂家： | 
PulseCore Semiconductor |
| 描述： | Clock Generator, 51MHz, CMOS, PDSO20, 0.150 INCH, LEAD FREE, SSOP-20 光电二极管 |
| 文件： | 总8页 (文件大小：311K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
ASM3P2110A
November 2003
rev 1.1
electromagnetic interference (EMI) at the clock source.
The ASM3P2110A allows significant system cost savings
by reducing the number of circuit board layers and
shielding that are required to pass EMI regulations. The
ASM3P2110A modulates the output of PLL in order to
spread the bandwidth of a synthesized clock, thereby
decreasing the peak amplitudes of its harmonics. This
results in significantly lower system EMI compared to the
typical narrow band signal produced by oscillators and
most clock generators. Lowering EMI by increasing a
signal’s bandwidth is called spread spectrum clock
generation.
Features
Generates an EMI optimized clocking
signal at output.
Input frequency – 12.75 MHz.
Output Frequency – 51 MHz (modulated)
Frequency Deviation: ±1%.
Modulation Rate: 30 KHz.
Supply voltage range 3.3V.
Available in commercial and industrial
temperature ranges.
Available in 20-pin 150-mil SSOP package.
Product Description
The ASM3P2110A is
a versatile spread spectrum
frequency modulator. The ASM3P2110A reduces
Block Diagram
VDD
XIN
Crystal
Oscillator
PLL
+
SS
ClockOut
(51MHz)
XOUT
Output
Buffer
REFOUT
SSON
VSS
Alliance Semiconductor
2575 Augustine Drive • Santa Clara CA • Tel: 408-855-4900 • Fax: 408-855-4999 • www.alsc.com
ASM3P2110A
November 2003
rev 1.1
Pin Configuration
20
1
REFOUT
NC
X2
X1
19
18
17
2
3
NC
4
NC
NC
NC
GND
NC
5
6
7
8
9
16
15 NC
14 NC
NC
NC
13
NC
12
NC
SSON
NC
11
CLK 10
Pin Description
Pin #
Pin Name Pin Type
Description
Crystal connection or external reference frequency input. This pin has
dual functions. It can be connected to either an external crystal or an
reference clock.
1
X2
O
Crystal connection. If using an external reference, this pin must be left
unconnected.
2
X1
I
3
VDD
P
Power supply to the entire chip. (3.3V)
9, 11,
13-16,
18, 19
10
NC
CLK
-
O
I
No connection.
Modulated output (51MHz).
Digital logic input used to enable spread spectrum function. (Active
HIGH). Spread spectrum is enabled when HIGH, disabled when LOW.
This pin has an internal pull-low resistor.
12
SSON
17
20
GND
P
Ground connection.
REFOUT
O
Un-modulated reference output clock of the input frequency.
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ASM3P2110A
November 2003
rev 1.1
Absolute Maximum Ratings
Symbol
VDD
VI
Parameter
Supply voltage, DC
Input voltage, DC
Output voltage, DC
Input clamp current (VI <0 or VI > VDD)
Output clamp current (VI <0 or VI > VDD)
Storage temperature
Ambient temperature range, under bias
Junction temperature
Lead temperature (soldering 10 sec)
Input static discharge voltage protection
(MIL –STD 883E, Method 3015.7)
Rating
(GND – 0.5) to 7
(GND-0.5) to (VDD+0.5)
(GND-0.5) to (VDD + 0.5)
-50 to +50
Unit
V
V
VO
IIK
IOK
TS
TA
TJ
V
mA
mA
°C
°C
°C
°C
-50 to +50
-65 to +150
-25 to +85
150
260
2
kV
Note: These are stress ratings only and functional operation is not implied. Exposure to absolute maximum
ratings for extended periods may affect device reliability.
Operating Conditions
Parameter
Supply Voltage
Ambient Operating
Temperature
Symbol
Condition / Description
Min
3
Typ
3.3
Max
3.6
Unit
V
3.3V ± 10%
VDD
TA
-20
+85
°C
Range
Crystal Resonator
Frequency
Output Driver Load
Capacitance
FXIN
CL
12.75
MHz
pF
15
Crystal Specifications
Fundamental AT cut parallel resonant crystal
Nominal frequency
12.75MHz
Frequency tolerance
Operating temperature range
Storage temperature
Load capacitance
± 50 ppm or better at 25°C
-20°C to +85°C
-40°C to +85°C
18pF
Shunt capacitance
ESR
7pF maximum
25 Ω
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ASM3P2110A
November 2003
rev 1.1
DC Electrical Characteristics
Parameter
Symbol
Conditions / Description
Overall
Min
Typ
Max
Unit
Supply Current,
Dynamic
VDD=3.3V, FCLK=12.75MHz,
CL=15pF
IDD
43
mA
All input pins
High-Level Input
Voltage
Low-Level Input
Voltage
High-Level Input
Current
VIH
VIL
IIH
VDD=3.3V
VDD=3.3V
2.0
VSS-0.3
-1
VDD+0.3
0.8
V
V
1
µA
µA
mA
mA
Low-Level Input
Current (pull-up)
High-Level Output
Source Current
Low-Level Output
Source Current
IIL
-20
-36
21
-80
30
IxOH
IxOL
VDD=V(XIN) = 3.3V, VO=0V
10
VDD=3.3V, V(XIN)=VO=5.5V
Clock Outputs
-10
-21
-30
High-Level Output
Source Current
Low-Level Output
Sink Current
IOH
IOL
VO=2.4V
-20
23
mA
mA
VO=0.4V
ZOH
ZOL
VO=0.5VDD; output driving high
Vo=0.5VDD; output driving low
29
27
Ω
Ω
Output Impedance
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ASM3P2110A
November 2003
rev 1.1
AC Electrical Characteristics
Parameter
Symbol
Conditions/ Description
VO = 0.3V to 3.0V;
CL = 15pF
Min
Typ
Max
Unit
Rise Time
tr
2.1
ns
VO = 3.0V to 0.3V;
CL = 15pF
Ratio of pulse width (as measured from
rising edge to next falling edge at 2.5V)
to one clock period
Fall Time
tf
1.9
ns
%
Clock Duty
Cycle
45
55
On rising edges 500 µs apart at 2.5 V
relative to an ideal clock, PLL B inactive *
On rising edges 500 µs apart at 2.5 V
relative to an ideal clock, PLL B active *
From rising edge to next rising edge at
2.5 V, PLL B inactive *
45
ps
Jitter, Long
Term
Tj (LT)
165
110
390
ps
Jitter, peak to
peak
Tj (∆T)
From rising edge to next rising edge at
2.5 V, PLL B active *
* CL = 15 pF, Input clock frequency = 12.75 MHz, Output frequency = 51 MHz
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ASM3P2110A
November 2003
rev 1.1
Package Information
20-Pin SSOP package
H
E
D
A
C
θ
e
A1
L
B
Symbol
Dimensions in inches
Dimensions in millimeters
Min
Max
Min
1.35
0.10
0.20
0.19
8.56
3.81
Max
1.75
0.25
0.30
0.25
8.74
3.99
A
A1
B
C
D
E
e
0.053
0.004
0.008
0.007
0.337
0.150
0.069
0.010
0.012
0.010
0.344
0.157
0.025 BSC
0.635BSC
H
L
0.228
0.016
0°
0.244
0.050
8°
5.79
0.41
0°
6.20
1.27
8°
θ
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ASM3P2110A
November 2003
rev 1.1
Ordering Codes
Part number
Package Configuration
20-pin SSOP TUBE
Temperature Range
ASM3P2110AF-20-JT
ASM3P2110AF-20-JR
ASM3I2110AF-20-JT
ASM3I2110AF-20-JR
Commercial
Commercial
Industrial
20-pin SSOP TAPE & REEL
20-pin SSOP TUBE
20-pin SSOP TAPE & REEL
Industrial
Ordering Information
A S M 3 P 2 1 1 0 A F - 2 0 - J R
OR - SOT23/T/R
TT – TSSOP, TUBE
TR – TSSOP, T/R
QT - QFN, TUBE
BT - BGA, TUBE
BR – BGA, T/R
ST – SOIC, TUBE
SR - SOIC, T/R
QR – QFN, T/R
VT – TVSOP, TUBE
VR – TVSOP, T/R
JR – SSOP, T/R
JT - SSOP, TUBE
PIN COUNT
Pb FREE
PART NUMBER
X = Automotive
I = Industrial
P or n/c = Commercial
1 – reserved
6 – power management
7 – power management
8 – power management
9 – Hi performance
0 - reserved
2 - Non PLL based
3 – EMI Reduction
4 – DDR support products
Alliance Semiconductor Mixed Signal Product
Licensed under US patent #5,488,627, #6,646,463 and #5,631,920.
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ASM3P2110A
November 2003
rev 1.1
Alliance Semiconductor Corporation
2575, Augustine Drive,
Santa Clara, CA 95054
Tel# 408-855-4900
Copyright © Alliance Semiconductor
All Rights Reserved
Preliminary Information
Part Number: ASM3P2110A
Document Version: v1.1
Fax: 408-855-4999
www.alsc.com
Note: This product utilizes US Patent # 6,646,463 Impedance Emulator Patent issued to Dan Hariton / Alliance Semiconductor, dated 11-11-2003
© Copyright 2003 Alliance Semiconductor Corporation. All rights reserved. Our three-point logo, our name and Intelliwatt are
trademarks or registered trademarks of Alliance. All other brand and product names may be the trademarks of their
respective companies. Alliance reserves the right to make changes to this document and its products at any time without
notice. Alliance assumes no responsibility for any errors that may appear in this document. The data contained herein
represents Alliance's best data and/or estimates at the time of issuance. Alliance 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
potential customers and users, and is not intended to operate as, or provide, any guarantee or warrantee to any user or
customer. Alliance does not assume any responsibility or liability arising out of the application or use of any product
described herein, and disclaims any express or implied warranties related to the sale and/or use of Alliance products
including liability or warranties related to fitness for a particular purpose, merchantability, or infringement of any intellectual
property rights, except as express agreed to in Alliance's Terms and Conditions of Sale (which are available from Alliance).
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other intellectual property rights of Alliance or third parties. Alliance does not authorize its products for use as critical
components in life-supporting systems where a malfunction or failure may reasonably be expected to result in significant
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assumes all risk of such use and agrees to indemnify Alliance against all claims arising from such use.
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