VSC8664
Quad Port 10/100/1000BASE-T PHY and 100BASE-FX/1000BASE-X SerDes with Recovered Clock Outputs
The industry’s first PHY with dual recovered clock outputs delivers
carrier-quality Synchronous Ethernet.
Helping OEMs to capitalize on the cost reduction and optimization
of Synchronous Ethernet, the VSC8664 addresses the challenges in
providing fully traceable timing across TDM backhaul links, cellular
base stations, and other Synchronous Ethernet applications. With dual
recovered clock outputs, the VSC8664 meets and goes beyond the
requirements of the ITU-T Recommendation G.8261/Y.1361.
Supporting four copper/fiber ports and SGMII MAC interfaces, the
VSC8664 includes a highly integrated feature set to ensure low-cost,
rapid deployment.
Meeting the carrier demands for redundancy, the VSC8664 features
dual recovered clocks to enable a primary and secondary timing
reference. Programmable clock squelch control is included to inhibit
undesirable clocks from propagating and to help prevent timing loops.
VSC8664 is the first GbE PHY to provide clock recovery in combination
with an SGMII interface, making layouts simpler than RGMII/GMII
solutions. Also featured is a fast link failure indication that can indicate
the onset of a link failure in less than 1 ms, a critical feature for support
of synchronization timing.
VSC8664 helps to lower the component count without sacrificing
capabilities or utility, resulting in more cost-effective production and
deployment. Its patented, low electromagnetic interference line driver
and integrated line side termination resistors conserve both power and
printed circuit board space. With an integrated I2C multiplexer to control
SFPs or power-over-Ethernet modules, VSC8664 also eliminates the
need for an external two-wire serial device.
Microsemi's mixed signal and digital signal processing (DSP)
architecture yield robust performance, supporting both full and half
duplex 10BASE-T, 100BASE-TX, and 1000BASE-T over >140 meters
of CAT-5, unshielded twisted pair cable, with industry leading tolerance
to NEXT, FEXT, Echo, and system noise. With dual, high-performance
1.25 Gbps SerDes, VSC8664 maximizes receive jitter tolerance and
minimizes transmit jitter in comparison to single SerDes architectures.
RJ-45
4
SFP
Applications
• Copper and fiber-based synchronous
Ethernet systems
• SGMII-to-SFP designs
• Multiport, SGMII-based Gigabit Ethernet
(GbE) designs
Low Power
• Low power consumption with three power
savings modes
• ActiPHY™ power management system
with built-in intelligence and saving modes
Recovered Clock
Output
4
1
2
Synchronous
Ethernet PLL
SGMII
VSC8664
4
Gigabit
Ethernet
Switch/MAC
CPU
1 GbE Line Card
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.
VSC8664
Quad Port 10/100/1000BASE-T PHY and 100BASE-FX/1000BASE-X SerDes with Recovered Clock Outputs
Wide Range of Support
• Compliant with IEEE 802.3 (10BASE-T, 100BASE-TX,
1000BASE-T, 100BASE-FX, and 1000BASE-X) specifications
• Support for 802.3ah unidirectional transport for 100BASE-FX
and 1000BASE-X fiber media
• Support for >16 kB jumbo frames in all speeds with
programmable synchronization FIFOs
• Supports Cisco SGMII v1.7 and 1000BASE-X MACs, IEEE
1149.1 JTAG boundary scan, and IEEE 1149.6 AC-JTAG
• VeriPHY® cable diagnostics suite provides extensive network
cable information such as cable length, termination status, and
open/short fault location
• Extensive test features (including near end, far end, and
connector loopback, and Ethernet packet generator with CRC
error counter) to decrease time-to-market
Advanced SerDes
• Dual, high-performance 1.25 Gbps SerDes to maximize receive
jitter tolerance and minimize transmit jitter (in comparison to
single SerDes architectures)
• Supports 100BASE-FX fiber, 1000BASE-X fiber, and triple-
speed copper SFPs over SerDes pins
• Advanced SerDes feature capabilities including transmitter
amplitude control, receiver equalization, and link integrity status
information
Synchronous Ethernet
• Recovered clock output support for G.8261 and IEEE-1588
synchronous Ethernet applications, including programmable
squelch control
• Patent-pending, fast link fail indication (<1 ms) to provide an
earlier indication of a link failure to critical metro ethernet traffic
and synchronization links
Related Products
Visit www.microsemi.com for information about other related
products.
Flexibility
• Integrated quad I2C multiplexer to control SFPs or PoE
modules, eliminating the need for an external two-wire serial
device for the control and status of SFP or PoE modules
VSC8664
10/100/
1000BASE-T
PMA
10/100/
1000BASE-T
PCS
Autonegotiation (SGMII, FIFOs)
Serial MAC Interface (SerDes)
MDI
Twisted Pair
Interface
MAC_TDP_n
MAC_TDN_n
MAC_RDP_n
MAC_RDN_n
Synchronous
Ethernet
1000BASE-X
PCS
1000BASE-X
PMA
TXVP_A_n
TXVN_A_n
TXVP_B_n
TXVN_B_n
TXVP_C_n
TXVN_C_n
TXVP_D_n
TXVN_D_n
RCVRD_CLK1
RCVRD_CLK2
FastLinkFail/
GPIO[9]
FIBR_DOP_n
FIBR_DON_n
100BASE-FX
PCS
100BASE-FX
PMA
MDI
SerDes
Interface
and
I2C MUX
FIBR_DIP_n
FIBR_DIN_n
SIGDET_n/
GPIO[3:0]
I2C_SDA/
GPIO[8]
10/100/1000BASE-T SFP Data Path
I2C_SCL_n/
GPIO[7:4]
CMODE[7:0]
NRESET
NSRESET
MDC
MDIO
MDINT_n
GPIO[15:10]
Management
and
Control
Interface
(MIIM)
JTAG
PLL
and
Analog
XTAL1/REFCLK
XTAL2
REF_FILT
REF_REXT
CLKOUT
LED Interface
TCK
TMS
TRST
TDO
TDI
LED[3:0]_n
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email: sales.support@microsemi.com
www.microsemi.com
Microsemi Corporation (Nasdaq: MSCC) offers a comprehensive portfolio of semiconductor and system solutions for com-
munications, defense and security, aerospace, and industrial markets. Products include high-performance and radiation-
hardened 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; enter-
prise 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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