VSC8257
Quad Channel 1G/10GBASE-KR to SFI Ethernet WIS PHY with VeriTime™
VSC8257 is a quad 1G/10G serial-to-serial Ethernet PHY featuring
VeriTime™, Microsemi's IEEE 1588v2 network timing technology. It
also supports dual-sided 10GBASE-KR functionality including autonegotiation and training in a small form factor, low-power FCBGA ideal
for a wide array of board-level signal integrity designs and system-level
IEEE standard compliant Ethernet connectivity.
VeriTime™ is Microsemi's patent-pending network timing technology
that delivers the industry’s most accurate IEEE 1588v2 implementation.
It is the only IEEE 1588v2 solution to be validated by major OEMs in
real-world tests, and it has already been adopted as the preferred lowcost upgrade for meeting emerging requirements in 4G/LTE-Advanced
(LTE-A). The VSC8257 device supports both 1-step and 2-step PTP
frames for ordinary clock, boundary clock, and transparent clock modes
of operation, along with complete Y.1731 OAM performance monitoring
capabilities.
Target applications for the VSC8257 device include switching, IP edge
router connectivity, rack mount server access through backplane, fiber
and copper cable connectivity, and standalone server access (in LAN on
motherboard designs or separate network adapters).
10 GbE
The device delivers excellent jitter attenuation with low power. It is also
well-suited for SFP+ and QSFP+ based optical modules and direct
attach copper cabling as well as challenging backplane interface
applications.
10 GbE Line Card or NIC
Highlights
• Standards supported include
IEEE 1588v2/Y.1731 OAM (4 ns),
IEEE 802.3ae, IEEE 802.3ap, SFF-8431,
ITU-T G.8261, and ITU-T G.8262
• Support for 10G LAN, 10G WAN, and 1G
modes
• Support for SFP+/QSFP+ line modules
and 10GBASE-KR backplanes between
1.25 Gbps and 10.3125 Gbps (including
auto-negotiation and training)
Applications
• Multi-port serial-to-serial signal conditioning
• 10GBASE-KR-compliant backplane
transceivers
• Networks requiring high-accuracy time
synchronization
• Multi-port XFI/KR to SFI/SFP+ 10 GbE
switch cards, router cards, and network
adapters
Switch Modules
Module
Quad
10 GbE
MAC/NIC
VSC8257
VSC8257
Module
10 G
Switch
Module
Module
4 × 10G
4 × 10G
4 × 1G
10GBASE-KR
Backplane
4 x 10G
4 x 1G
4 x 10G
4 x 1G
Microsemi makes no warranty, representation, or guarantee regarding the information contained herein or the suitability of its products and services for any particular purpose, nor does Microsemi assume any liability
whatsoever arising out of the application or use of any product or circuit. The products sold hereunder and any other products sold by Microsemi have been subject to limited testing and should not be used in conjunction
with mission-critical equipment or applications. Any performance specifications are believed to be reliable but are not verified, and Buyer must conduct and complete all performance and other testing of the products, alone
and together with, or installed in, any end-products. Buyer shall not rely on any data and performance specifications or parameters provided by Microsemi. It is the Buyer’s responsibility to independently determine suitability
of any products and to test and verify the same. The information provided by Microsemi hereunder is provided “as is, where is” and with all faults, and the entire risk associated with such information is entirely with the Buyer.
Microsemi does not grant, explicitly or implicitly, to any party any patent rights, licenses, or any other IP rights, whether with regard to such information itself or anything described by such information. Information provided in
this document is proprietary to Microsemi, and Microsemi reserves the right to make any changes to the information in this document or to any products and services at any time without notice.
VSC8257
Quad Channel 1G/10GBASE-KR to SFI Ethernet WIS PHY with VeriTime™
Built-in Self-Test and SyncE
Key Specifications
The VSC8257 device provides a complete suite of on-chip instrumentation including built-in self-test (BIST) functions, line-side
and client-side circuit loopbacks, pattern generation, and error
detection. Its highly flexible clocking options support LAN and
WAN operation using a single 156.25 MHz reference clock rate.
Support for Synchronous Ethernet (SyncE) is also included.
• 1.2 W, typical, for each bidirectional channel
• 1.2 V and 1.0 V core power supplies (2.5 V TTL supply)
Range of Support
• IEEE 1588v2/Y.1731 OAM precision timing support at
1.25 Gbps and 10.3 Gbps
• Compliant with IEEE 802.3-2012 and SFF-8431 electrical (SFI)
specifications
• 9.95 Gbps WAN and 10.3 Gbps LAN operation, as well as
1.25 Gbps Ethernet support
• Standard SFP+ and QSFP+ applications
• 10GBASE-KR (IEEE 802.3-2012) for 10G backplanes, including 1.25 Gbps and 10.3 Gbps auto-negotiation
• Adaptive equalization receiver and programmable multi-tap
transmitter pre-emphasis
• SPI, MDIO, and two-wire serial slave management interfaces
• VScope input signal monitoring integrated circuit
• Host-side and line-side loopbacks with BIST functions
• I/O programmability for lane swap, invert, amplitude, slew, preemphasis, and equalization
• Optional forward error correction (FEC)
• Flexible clocking options that enable Layer 1 support for Synchronous Ethernet
• Passive copper cable support for lowest connectivity cost
Related Products
Visit www.microsemi.com for information about these related
products:
• VSC8256 and VSC8258
• VSC8489, VSC8490, and VSC8491
• VSC8582 and VSC8584
• VSC7442, VSC7444, and VSC7448
• VSC7460, VSC7462, and VSC7468
Clocking Network for Timing and Retiming (including SyncE support)
Host LCPLL
Line LCPLL
Port 0
XFI/KR/1 GbE
SD10G
SD10G
Port 0
SFP+/KR/1GE
Port 1
XFI/KR/1 GbE
SD10G
SD10G
Port 1
SFP+/KR/1GE
4 × 10G/1G
Serial Lanes
PCS
FIFO
PCS
4 × 10G/1G
Serial Lanes
WIS
Port 2
XFI/KR/1 GbE
SD10G
SD10G
Port 2
SFP+/KR/1GE
Port 3
XFI/KR/1 GbE
SD10G
SD10G
Port 3
SFP+/KR/1GE
SPI/MDIO/TWS
Microsemi Corporate Headquarters
One Enterprise, Aliso Viejo, CA 92656 USA
Within the USA: +1 (800) 713-4113
Outside the USA: +1 (949) 380-6100
Sales: +1 (949) 380-6136
Fax: +1 (949) 215-4996
email: sales.support@microsemi.com
www.microsemi.com
SPI Slave
MDIO Slave
Two-Wire Serial Slave
Two-Wire Serial Master
Line
Host/Client
Flexibility and Tools
TWS
Microsemi Corporation (Nasdaq: MSCC) offers a comprehensive portfolio of semiconductor and system solutions for communications, defense and security, aerospace, and industrial markets. Products include high-performance and radiationhardened analog mixed-signal integrated circuits, FPGAs, SoCs, and ASICs; power management products; timing and
synchronization devices and precise time solutions; voice processing devices; RF solutions; discrete components; enterprise storage and communications solutions, security technologies, and scalable anti-tamper products; Ethernet solutions;
Power-over-Ethernet ICs and midspans; custom design capabilities and services. Microsemi is headquartered in Aliso Viejo,
California, and has approximately 4,800 employees worldwide. Learn more at www.microsemi.com.
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and service marks are the property of their respective owners.
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