SEMTECH ACS9520PB

ToPSync®
ACS9520T
ADVANCED COMMS PRODUCT GROUP
PRODUCT BRIEF
About the ToPSync® ACS9520T
Features
®
This is the product brief for the ToPSync ASSP ACS9520T. The
datasheet should be read in conjunction with the ACS9520T
user guide, API documentation and other information available
at the ToPSync® Resource Center.
There are many applications in which it is necessary to lock a
remote clock signal to a central frequency source, and there
are other applications which require the alignment of a clock
to a central source of time. The ACS9520T combines
Semtech's synchronous equipment timing source (SETS)
functionality and ToPSync® technology and can therefore be
used for both applications. In this datasheet, the words SETS
and TDM Block are synonymous, and both terms are used.
SETS functionality is used for frequency-locking applications in
SDH/SONET and Ethernet equipment. ToPSync® technology
combines the IEEE 1588 v2 protocol with Semtech's patented
packet delay filtering algorithms, which allow a reference clock
to be transported across a packet switched network without
special adaptations of switches or routers in the network. It is
ideal for carrying timing across a legacy packet switched
network.
IEEE 1588 is often known as precision time protocol (PTP), the
acronym that is generally used in this document.
The ACS9520T supports:
Timebase derived from:
PTP slave, SONET/SDH recovered clock, BITS/SSU input,
SyncE recovered clock, GPS, 1PPS, precision holdover.
Physical layer clock sources are jitter and wander
attenuated according to G.813, G.823, GR1244, GR253,
G.8261, G.8262(draft) etc.
Technology bridging:
Derive timing from one input technology (SONET, SDH,
SyncE, PTP) and provide timing to all output technologies
simultaneously.
PTP Grandmaster:
PTP Grandmaster functions provided based on the
timebase including support for UTC, TAI, GPS time epochs.
PTP Slave:
Multi-hop locking (ordinary clock) or interworking with
boundary clocks or transparent clocks with sophisticated
packet delay filters and adaptation algorithms.
TDM/clocks:
Includes all Semtech SETS family functions for physical
layer input and output synchronization.
SyncE:
Integrates Semtech eSETS technology for the physical layer
input and output synchronization of ethernet PHY devices.
Self test - in which the device self-checks for consistency,
checks the external SDRAM for faults, and performs
rudimentary checks of the external Ethernet PHYs.
ACS9520TPB_US, Revision 01, 2nd November 2012
©2012 Semtech Corp.
PTP timing features
 PTP Grandmaster selection - automatic or manual PTP
master/slave mode selection.
 Powerful network delay analysis - full time-alignment in the
slave over hostile networks (Layer 2 or layer 3 networks).
 Dynamic adaptation - to network delay variations. Network
loading change tolerant (e.g., ramps and steps).
 Time alignment - better than ±1 μs on a managed
10-switch GbE network under G.8261 test conditions.*
 Frequency alignment - better than ±10 ppb on a managed
5-switch GbE network under G.8261 test conditions.*
TDM timing features
 Programmable TDM timing bandwidth - for wander and
jitter tracking/attenuation, 0.1 Hz to 70 Hz in 10 steps.
 Automatic hit-less source switchover - on loss of input.
 Output clock phase adjustment - in 6 ps steps to ±200 ns.
Device features
 Fully integrated - Integrates hardware precision
timestamping with on-the-fly insertion. Powerful integrated
processor and clock recovery algorithm.
 ECC - Provision for optional ECC memory.
 Ultra low noise clock generation - Interface to the Semtech
SX1790 Ultra low noise frequency synthesizer.
 Timing synchronization on a chip - supporting transitions
from legacy circuit networks to new packet technology.
 Suitable applications - Stratum 3, 3E, 4E, 4, SONET
Minimum Clock (SMC) or SONET/SDH Equipment Clock
(SEC) or Ethernet, IEEE1588 PTP and Synchronous
Ethernet.
 Clocks - 9 clock inputs and 5 clock outputs.
 Precision holdover - in all modes.
 Ports - 2 x SGMII, SDRAM, serial interface and JTAG.
 Time-of-day - PPnS top-of-second signal plus
current-time-since-epoch message on a UART.
 Output characteristics:
Time-aligned output pair:
1 PPS and 125 MHz divided by n (n = 4 to 125000).
Frequency-aligned outputs:
1 Hz and programmable frequency 1 kHz to 180 MHz.
Low jitter frequency-aligned outputs:
SONET and SDH OC-n rates: 3.84 MHz to 155.52 MHz.
SyncE rates: 25 MHz, 50 MHz, 62.5 MHz and 125 MHz
 Local oscillator: ±20 ppm or better.
 BGA package: 256 pin, 14 mm x 14 mm.
Lead-free - RoHS and WEEE compliant.
A simplified system diagram is shown in Figure 1.
*
Page 1
This is an indication of Semtech tested performance and is not
guaranteed across all types of switches and network conditions.
Please contact Semtech ToPSync® support for further details.
www.semtech.com
ToPSync®
ACS9520T
ADVANCED COMMS PRODUCT GROUP
PRODUCT BRIEF
System diagram
Figure 1
Simplified system diagram - ACS9520T ToPSync® in PTP Grandmaster and Slave modes
ACS9520TPB_US, Revision 01, 2nd November 2012
©2012 Semtech Corp.
Page 2
www.semtech.com
ToPSync®
ACS9520T
ADVANCED COMMS PRODUCT GROUP
D
A
PRODUCT BRIEF
D1
B
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16
T
R
PIN 1
INDEX
(LASER MARK
P
N
M
L
K
J
E
E1
H
G
F
E
D
C
B
A
A1 CORNER
SEE DETAIL A
SEE DETAIL B
DETAIL B
Scale: 2/1
bxN
bbb M C A B
ccc M C
DETAIL A
Scale: 2/1
f
DIM
A2
A
SEATING
PLANE
aaa C
A1
C
Notes
1 Controlling dimensions are in mm (angles in degrees).
2 “M” represents the basic solder ball matrix size and
“N” is the number of attached solder balls.
Figure 2
A
A1
A2
b
D
D1
E
E1
e
f
M
N
aaa
bbb
ccc
DIMENSIONS
MILLIMETERS
MIN
NOM
MAX
----1.46
0.25
0.30
0.35
1.01
1.06
1.11
0.35
0.40
0.45
13.90 14.00 14.10
12.00 BSC
13.90 14.00 14.10
12.00 BSC
0.80 BSC
--1.00
--16
256
----0.10
----0.20
----0.10
e
f
BGA package, 1 mm pitch, 14 mm x 14 mm, 256 balls
Thermal conditions
The ACS9520T is rated for full temperature range when this package is used with a PCB of four layers or more.
Copper coverage must exceed 50%. All balls must be soldered to the PCB.
Maximum operating temperature must be reduced when the ACS9520T is used with a PCB that does not meet these
requirements.
ACS9520TPB_US, Revision 01, 2nd November 2012
©2012 Semtech Corp.
Page 3
www.semtech.com
ToPSync®
ACS9520T
ADVANCED COMMS PRODUCT GROUP
Disclaimers
PRODUCT BRIEF
Life support - this product is not designed or intended for use in life support equipment, devices or systems, or other critical
applications, and is not authorized or warranted for such use.
Right to change - changes may be made to this product without notice. Customers are advised to obtain the latest version of the
relevant information before placing orders.
Compliance to relevant standards - operation of this device is subject to the user’s implementation and design practices. It is the
responsibility of users to ensure that equipment using this device is compliant to all relevant standards.
Contact information for Semtech International AG
Semtech Corporation Advanced Communications Product Group
E-mail: [email protected]@semtech.comInternet: http://www.semtech.com
USA
200 Flynn Road, Camarillo, CA 93012-8790.
Tel: +1 805 498 2111 Fax: +1 805 498 3804
FAR EAST
12F, No. 89 Sec. 5, Nanking E. Road, Taipei, 105, TWN, R.O.C.
Tel: +886 2 2748 3380 Fax: +886 2 2748 3390
EUROPE
Semtech Ltd., Units 2 & 3, Park Court, Premier Way, Abbey Park Industrial Estate, Romsey, Hampshire, SO51 9DN.
Tel: +44 (0)1794 527 600 Fax: +44 (0)1794 527 601
ACS9520TPB_US, Revision 01, 2nd November 2012
©2012 Semtech Corp.
Page 4
www.semtech.com