VSC8244 데이터 시트보기 (PDF) - Vitesse Semiconductor
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VSC8244 Datasheet PDF : 2 Pages
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VSC8244
Quad Port 10/100/1000BASE-T PHY with RGMII / RTBI MAC Interfaces
GENERAL DESCRIPTION:
The VSC8244 is the industry’s smallest, lowest power quad port Gigabit Ethernet transceiver for low-cost
RGMII and RTBI switch and router applications. In 1000BASE-T mode, the VSC8244’s power consumption
is 30% lower than the next best competitor. The device’s compact 19mm x 19mm BGA package is ideal for
high-density switch applications. Vitesse’s mixed signal and DSP architecture yields robust performance,
supporting both full and half duplex 10BASE-T, 100BASE-TX, and 1000BASE-T over >140m of Category 5,
unshielded twisted pair (UTP) cable, with industry leading tolerance to NEXT, FEXT, Echo, and system noise.
SPECIFICATIONS:
PARAMETER
PD
VDD I/O
VDDA
VDDDIG
FTOL (REFERENCE)
TYP
<640
3.3, 2.5, 1.5
3.3
1.2
25
UNIT
mW
V
V
V
MHz
COMMENTS
Steady state power consumption per port
I/O power supply voltage options
Analog supply voltage
Core power supply voltage
Crystal parallel resonant frequency (+/- 100ppm tolerance)
BLOCK DIAGRAM:
TXD[3:0]_n
TX_CTL_n
TX_CLK_n
RXD[3:0]_n
RX_CTL_n
RX_CLK_n
MAC I/F
RGMII
or
RTBI
PCS
PCS
ENCODER
PAM-5 SYMBOL
MAPPER,
SCRAMBLER
PMA (DSP Data Pump)
TX FIR
NC1
NC2
NC3
EC
PCS
DECODER
PAM-5 SYMBOL
DE-MAPPER,
DESCRAMBLER
TRELLIS
DECODER
4
+
FFE
X4
TIMING RECOVERY
MDI (Analog Front End)
DAC
HYBRID
Port 3
Port 2
Port 1
Port 0
ADC
VGA
TXVP_A_n
TXVN_A_n
TXVP_B_n
TXVN_B_n
TXVP_C_n
TXVN_C_n
TXVP_D_n
TXVN_D_n
CMODE[7:0]
RESET
SOFT_RESET
MDC
MDIO
MDINT_n
EEDAT
EECLK
CONTROL
MANAGEMENT
INTERFACE
JTAG
TEST
MANAGER
SYSTEM
LED INTERFACE
XTAL1/2
REF_FILT
REF_REXT
CLK125MAC
CLK125micro
LED[4:0]_n
For more information on Vitesse Products visit the Vitesse web site
at www.vitesse.com or contact Vitesse Sales at (800) VITESSE
or sales@vitesse.com
Vitesse, ASIC-Friendly, FibreTimer, TimeStream and Snoop Loop are trademarks of Vitesse Semiconductor Corporation.
All other trademarks or registered trademarks mentioned herein are the property of their respective holders. Vitesse
Semiconductor Corporation ("Vitesse") retains the right to make changes to its products or specifications to improve
performance, reliability or manufacturability. All information in this document, including descriptions of features,
functions, performance, technical specifications and availability, is subject to change without notice at any time.
741 Calle Plano
Camarillo, CA 93012, USA
Tel: +1 805.388.3700
Fax: +1 805.987.5896
www.vitesse.com
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