PulseCore ASM3P2854BG-16-TR Custom clock generator for fax system Datasheet

ASM3P2854B
March 2007
rev 0.2
Custom Clock Generator for Fax System
Features
•
•
Generates Custom Clocks for FAX system from
•
1x 12MHz for USB PHY (USB2.0)
an inexpensive 24MHz Crystal
•
1x Programmable clock for printer engine control
2x 66.66MHz low EMI (Spread Spectrum) clocks
•
One of the four programmable clock outputs
selection through two Select Pins
for ASIC1 (System / DDR SDRAM)
•
•
•
1x 48MHz for USB1.1 HOST
•
Supply Voltage 3.3V +/- 0.3V
2x 33.33MHz low EMI (Spread Spectrum) clocks
•
Available in 16L TSSOP, Green package
for System / DDR SDRAM of ASIC2 and ASIC3
•
Commercial Temperature operation
1x 25MHz low EMI (Spread Spectrum) clock for
LCD, Serial port, and buzzer of ASIC1
Product Description
ASM3P2854B is a part of the two chip custom clock
48MHz clock used by USB1.1 HOST, and a 12MHz clock
generator solution for NEC FAX system. Together with
used
ASM3P2855A, ASM3P2854B realizes all the seventeen
Programmable
clocks
and
24.00448MHz,
subsystems of the FAX system. It uses an inexpensive
20.40464MHz
24MHz crystal as the input to generate two 66.66MHz low
selectable through
EMI (spread spectrum) clocks used by ASIC1 for system
accuracy of the synthesized programmable clocks is
/ DDR SDRAM, two 33.33MHz low EMI (spread
within +/- 18ppm. The custom clock generator works with
spectrum) clocks used by ASIC2 and ASIC3 for system /
a Supply Voltage for 3.3V. The device is available in a
DDR SDRAM, a 25MHz low EMI (Spread Spectrum)
16L TSSOP Green package, in commercial temperature
clock used by ASIC1 for LCD, Serial port, and buzzer, a
range. The output Clocks have an accuracy of ±50ppm.
required
by
the
various
components
Block Diagram
by
USB
PHY
(USB2.0).
clock
(PCLK)
21.33732MHz,
used
for
Printer
One
of
the
frequencies
21.19962MHz
Engine
2
PLL
2
control
66.6MHz SSCLK
33.3MHz SSCLK
25MHz SSCLK
XIN / CLKIN
XOUT
48MHz
Crystal
(24 MHz)
PLL
12MHz
PLL
PCLK
S1
S2
GND
of
and
is
two Select pins S1 and S2. The
VDD_FOUT
VDD
four
GND_FOUT
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.
ASM3P2854B
March 2007
rev 0.2
Pin Diagram
XIN / CLKIN
1
16
25MHz SSCLK
XOUT
2
15
PCLK
VDD
3
14
S2
VDD_FOUT
4
13
66.6MHz SSCLK
GND_FOUT
5
12
66.6MHz SSCLK
GND
6
11
S1
48MHz
7
10
33.3MHz SSCLK
12MHz
8
9
33.3MHz SSCLK
ASM3P2854B
Pin Description
Pin#
Pin Name
Type
Description
1
XIN / CLKIN
I
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.
2
XOUT
O
Crystal connection. If using an external reference, this pin must be left unconnected.
3
VDD
P
Power supply for the core
4
VDD_FOUT
P
Power supply for the output buffers.
5
GND_FOUT
P
Ground connection for the output buffers
6
GND
P
Ground connection
7
48MHz
O
48MHz Clock Output
8
12MHz
O
12MHz Clock Output
9
33.3MHz
O
33.3 MHz low EMI Clock Output
10
33.3MHz
O
33.3 MHz low EMI Clock Output
11
S1
I
Selection Bit for Programmable Clock .See the PCLK Selection Table for details
12
66.6MHz
O
66.6 MHz low EMI Clock Output
13
66.6MHz
O
66.6 MHz low EMI Clock Output
14
S2
I
Selection Bit for Programmable Clock .See the PCLK Selection Table for details
15
PCLK
O
Programmable Clock Output
16
25MHz
O
25 MHz low EMI Clock Output
Custom Clock Generator for Fax System
Notice: The information in this document is subject to change without notice.
2 of 8
ASM3P2854B
March 2007
rev 0.2
PCLK Selection Table
S2
S1
Programmable Clock (MHz)
0
0
24.00448
0
1
21.33732
1
0
21.19962
1
1
20.40464
Absolute Maximum Ratings
Symbol
Parameter
VDD,
VDD_FOUT
TSTG
Rating
Unit
Voltage on any pin with respect to Ground
-0.5 to +4.6
V
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.
Recommended Operating Conditions
Symbol
TA
VDD
VDD_FOUT
Parameter
Operating Temperature
Min
Typ
0
Max
Units
+70
°C
Core Voltage
+3.0
+3.3
+3.6
V
Output Voltage
+3.0
+3.3
+3.6
V
Custom Clock Generator for Fax System
Notice: The information in this document is subject to change without notice.
3 of 8
ASM3P2854B
March 2007
rev 0.2
DC Electrical Characteristics
Symbol
Max
Unit
VIL
Input low voltage
Parameter
GND - 0.3
Min
Typ
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 = 15mA)
VOH
Output high voltage (VDD = 3.3V, IOH = 15mA)
IDD
Static supply current*
ICC
0.4
2.5
V
V
14
Dynamic supply current ( VDD=3.3V, No Load)
mA
33
mA
VDD
Operating Voltage
3.0
3.3
3.6
V
VDD_FOUT
Operating Voltage
3.0
3.3
3.6
V
5
mS
tON
ZOUT
Power-up time (first locked cycle after power-up)
Output impedance
37
Ω
* XIN pin is pulled low
AC Electrical Characteristics
Symbol
XIN / CLKIN
FOUT
fd
Parameter
Min
Input frequency
Output frequency
Frequency Deviation
Typ
Max
Unit
24
At Pin 7
48
At Pin 8
12
At Pins 9 and 10
33
At Pins 12 and 13
66
At Pin 15*
PCLK
At Pin 16
25
Output Frequency = 25MHz
-0.45
Output Frequency = 33.3MHz
-0.6
Output Frequency = 66.6MHz
-1.2
tLH**
Output rise time (measured from 0.8 to 2.0V)
1.0
tHL **
Output fall time (measured at 2.0V to 0.8V)
1.0
tJC
Jitter (Cycle to cycle)
250
tD
Output duty cycle
45
50
MHz
%
nS
pS
55
%
* See the PCLK Selection Table for PCLK Frequency
** tLH and tHL are measured into a capacitive load of 15pF
Custom Clock Generator for Fax System
Notice: The information in this document is subject to change without notice.
4 of 8
ASM3P2854B
March 2007
rev 0.2
Typical Crystal Oscillator Circuit
Crystal
C1 = 27 pF
R1 = 510Ω
C2 = 27 pF
Typical Crystal Specifications
Fundamental AT cut parallel resonant crystal
Nominal frequency
24 MHz
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
25 Ω
Custom Clock Generator for Fax System
Notice: The information in this document is subject to change without notice.
5 of 8
ASM3P2854B
March 2007
rev 0.2
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 Fax System
Notice: The information in this document is subject to change without notice.
6 of 8
ASM3P2854B
March 2007
rev 0.2
Ordering Codes
Ordering Code
Marking
Package Type
Temperature
ASM3P2854BG-16-TT
3P2854BG
16-pin 4.4-mm TSSOP - TUBE, Green
Commercial
ASM3P2854BG-16-TR
3P2854BG
16-pin 4.4-mm TSSOP - TAPE & REEL, Green
Commercial
A S M 3 P 2 8 5 4 B G - 1 6 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
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 Fax System
Notice: The information in this document is subject to change without notice.
7 of 8
ASM3P2854B
March 2007
rev 0.2
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: ASM3P2854B
Document Version: V0.2
Note: This product utilizes US Patent # 6,646,463 Impedance Emulator Patent issued to PulseCoree Semiconductor, dated 11-11-2003
© Copyright 2007 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
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
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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 Fax System
Notice: The information in this document is subject to change without notice.
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