PULSECORE ASM3P2856AG-16-TT

ASM3P2856A
ASM3P2856B
November 2006
rev0.1
Custom Clock generator for LCD Projector
Features
Product Description
•
Custom Clock Generator for LCD Projector
ASM3P2856A/B generate the required four custom clock
•
Generates EMI optimized clock signals for
frequencies
LCD Projector system
14.7456MHz crystal is used to generate a 14.7456MHz
Uses an inexpensive 14.7456 MHz crystal for
used by the microcomputer, a 27MHz used by Video, a
generating the required Outputs
non-spread 65MHz, and a centre spread 65MHz clock used
Frequency outputs:
by the LCD projector system. The spread spectrum clock
•
•
• CLK1 : 27.002MHz
for
the
LCD
Projector.
An
has +/- 0.5% or +/- 1% spread options.
(± 20 ppm)
inexpensive
The spread
• CLK2 : 14.7456MHz (Zero ppm)
spectrum clock of ASM3P2856A/B reduces electromagnetic
• CLK3 : 65MHz (± 15 ppm)
interference (EMI) at the clock source. This allows
• CLK4,CLK5 : 65MHz (±15 ppm) Spread
significant system cost savings by reducing the number of
circuit board layers and shielding that are required to pass
Spectrum Clock
EMI regulations.
• ASM3P2856A: +/- 1% centre spread
ASM3P2856B: selectable +/-1.0% & +/-1.5%
Centre Spread option
•
Supply voltage range 3.3V ± 0.3V.
•
Available in 16 Pin TSSOP
•
Available in Commercial Temperature range
Applications
ASM3P2856A/B is targeted for use in LCD Projectors.
Block Diagram
VDD SSON SS%
CLK1
XIN
XOUT
CLK2
Crystal
Oscillator
PLL
CLK3
CLK4
CLK5
GND
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.
ASM3P2856A
ASM3P2856B
November 2006
rev 0.1
Pin Configuration
XIN
1
16
VDD
XIN
1
16
VDD
XOUT
2
15
NC
XOUT
2
15
NC
VDD
3
14
GND
VDD
3
14
GND
VDD
4
13
NC
VDD
4
13
SSON
GND
5
12
NC
GND
5
12
SS%
GND
6
11
CLK5
GND
6
11
CLK5
CLK1
7
10
CLK4
CLK1
7
10
CLK4
CLK2
8
9
CLK3
CLK2
8
9
CLK3
ASM3P2856A
ASM3P2856B
Pin Description
Pin#
Pin Name
Type
Description
1
XIN
I
2
XOUT
O
Connection to crystal or external reference frequency input. This pin has dual
functions. It can be connected either to an external crystal or an external
reference clock.
Connection to crystal. If using an external reference clock, this pin must be left
unconnected.
3
VDD
P
Power supply for the entire Chip
4
VDD
P
Power supply for the entire Chip
5
GND
P
Ground to entire chip
6
GND
P
Ground to entire chip
7
CLK1
O
27.002 MHz Clock output. Refer to Input & Output Frequency Table for details.
8
CLK2
O
9
CLK3
O
10
CLK4
O
11
CLK5
O
Reference Clock Output. Refer to Input & Output Frequency Table for details.
65 MHz non-spread Clock output. Refer to Input & Output Frequency Table for
details.
65 MHz Spread Spectrum Clock Output. Refer to Input & Output Frequency
Table for details.
65 MHz Spread Spectrum Clock Output. Refer to Input & Output Frequency
Table for details.
NC
-
SS%
I
NC
-
SSON
I
14
GND
P
Ground to entire chip
15
NC
-
No Connection
16
VDD
P
Power supply for the entire Chip
12
13
No Connection for ASM3P2856A
Spread percentage selection pin for ASM3P2856B. Refer to Spread Selection
Table for details. Has an internal pull down resistor
No Connection for ASM3P2856A
Spread spectrum selection. When SSON is HIGH, spread spectrum is enabled
and when LOW, it turns off the spread spectrum. Connect the pin to ground
When Spread Spectrum feature is not required. Has an internal pull up resistor.
Custom Clock generator for LCD Project
Notice: The information in this document is subject to change without notice.
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ASM3P2856A
ASM3P2856B
November 2006
rev 0.1
Input & Output Clock Frequency Table
Input
Frequency
Output Frequencies
Frequency Accuracy of
synthesized clocks
CLK1
27.002 MHz
±20 ppm
CLK2
14.7456 MHz
Zero ppm
CLK3
65 MHz Non- Spread clock
±15 ppm
CLK4
65 MHz Spread Spectrum Clock
±15 ppm
14.7456 MHz
(+/-0.5 or +/- 1%)
65 MHz Spread Spectrum Clock
CLK5
±15 ppm
(+/-0.5 or +/-1%)
Spread Selection Table
SS%
Spread Percentage
0
1
± 1.0%
± 1.5%
Typical Application Schematic for LCD Projector
+ 3.3V
14.7456 MHz
fundamental
Crystal
+ 3.3V
0.1uF
27.002MHz Clock
14.7456MHz Clock
1
XIN
VDD
16
2
XOUT
NC
15
3
VDD
GND 14
SSON
4 VDD
13
ASM3P2856B
Make SSON Pin
HIGH to enable
Spread Spectrum
5
GND
SS%
12
SS% Pin selects
different Spread
deviations
6
GND
CLK5
11
65MHz SS Clock
7
CLK1
CLK4
10
65MHz SS Clock
8 CLK2
CLK3
9
65MHz Clock
Custom Clock generator for LCD Project
Notice: The information in this document is subject to change without notice.
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ASM3P2856A
ASM3P2856B
November 2006
rev 0.1
Absolute Maximum Ratings
Symbol
VDD
VIN
TSTG
Parameter
Rating
Power Supply Voltage relative to GND
Unit
-0.5 to +4.6
Input Voltage relative to GND (Input Pins)
-0.5 to VDD+0.5
Storage temperature
V
-65 to +125
°C
0 to 70
°C
TA
Operating temperature
Ts
Max. Soldering Temperature (10 sec)
260
°C
TJ
Junction Temperature
150
°C
2
KV
TDV
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.
DC Electrical Characteristics
(Test condition: All parameters are measured at room temperature (+ 25°C) unless otherwise stated)
Symbol
Parameter
Min
Typ
Max
Unit
VIL
Input low voltage
GND - 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 ([email protected], VDD=3.3V)
-
3
-
mA
IXOH
XOUT output high current ([email protected], VDD=3.3V)
-
3
-
mA
VOL
Output low voltage (VDD = 3.3V, IOL = 10mA)
-
-
0.4
V
VOH
Output high voltage (VDD = 3.3V, IOH = 10mA)
2.5
-
-
V
IDD
Static supply current*
-
TBD
-
µA
ICC
Dynamic supply current ( VDD =3.3V)
-
TBD
-
mA
3.0
3.3
3.6
V
Power-up time (first locked cycle after power-up)
-
-
5
mS
Output impedance
-
TBD
-
Ω
VDD
tON
ZOUT
Operating Voltage
* XIN is pulled low
Custom Clock generator for LCD Project
Notice: The information in this document is subject to change without notice.
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ASM3P2856A
ASM3P2856B
November 2006
rev 0.1
AC Electrical Characteristics
Symbol
XIN
FOUT
Parameter
Min
Typ
Max
Unit
-
14.7456
-
MHz
CLK1
-
27.002
-
CLK2
-
14.7456
-
CLK3
-
65
-
Input frequency
Output frequency
CLK4 (SS Clock )
65
CLK5 (SS Clock )
65
For SS% = 0
-
± 1.0
-
MHz
fd
Frequency Deviation
(CLK4, CLK5 )
tLH*
Output rise time (measured from 0.8 to 2.0V)
-
1.4
-
nS
tHL *
Output fall time (measured at 2.0V to 0.8V)
-
1.2
-
nS
tJC
Jitter (Cycle to cycle)
-
TBD
-
pS
tD
Output duty cycle
40
50
60
%
± 1.5
For SS% = 1
%
* tLH and tHL are measured into a capacitive load of 15pF
Custom Clock generator for LCD Project
Notice: The information in this document is subject to change without notice.
5 of 8
ASM3P2856A
ASM3P2856B
November 2006
rev 0.1
Package Information
16-lead Thin Shrunk Small Outline Package (4.40-MM Body)
1
8
PIN 1 ID
E
16
A
A2
e
B
A1
Seating Plane
C
θ
D
9
H
L
D
Dimensions
Symbol
Inches
Min
Millimeters
Max
A
Min
Max
0.043
1.20
A1
0.002
0.006
0.05
0.15
A2
0.031
0.041
0.80
1.05
B
0.007
0.012
0.19
0.30
C
0.004
0.008
0.09
0.20
D
0.193
0.201
4.90
5.10
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
0.030
0.50
0.75
θ
0°
8°
0°
8°
Custom Clock generator for LCD Project
Notice: The information in this document is subject to change without notice.
6 of 8
ASM3P2856A
ASM3P2856B
November 2006
rev 0.1
Ordering Codes
Ordering Code
Marking
Package Type
Operating Range
ASM3P2856AG-16-TT
3P2856AG
16-pin 4.4-mm TSSOP - TUBE, Green
Commercial
ASM3P2856AG-16-TR
3P2856AG
16-pin 4.4-mm TSSOP - TAPE & REEL,Green
Commercial
ASM3P2856BG-16-TT
3P2856BG
16-pin 4.4-mm TSSOP - TUBE, Green
Commercial
ASM3P2856BG-16-TR
3P2856BG
16-pin 4.4-mm TSSOP - TAPE & REEL,Green
Commercial
Device Ordering Information
A S M 3 P 2 8 5 6 A G - 1 6 - T R
R = Tape & Rzeel, 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
DEVICE 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
Custom Clock generator for LCD Project
Notice: The information in this document is subject to change without notice.
7 of 8
ASM3P2856A
ASM3P2856B
November 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: ASM3P2856A
ASM3P2856B
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 three-point logo, our name and Intelliwatt
are trademarks or registered trademarks of PulseCore. 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
potential customers and users, and is not intended to operate as, or provide, any guarantee or warrantee to any user or
customer. PulseCore 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 PulseCore 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 PulseCore’s Terms and Conditions of Sale (which are available from
PulseCore). All sales of PulseCore products are made exclusively according to PulseCore's Terms and Conditions of Sale.
The purchase of products from PulseCore does not convey a license under any patent rights, copyrights; mask works rights,
trademarks, or any other intellectual property rights of PulseCore or third parties. PulseCore 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 injury to the user, and the inclusion of PulseCore products in such life-supporting systems implies that the
manufacturer assumes all risk of such use and agrees to indemnify PulseCore against all claims arising from such use.
Custom Clock generator for LCD Project
Notice: The information in this document is subject to change without notice.
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