88e1240 Marvell Semiconductor, Inc., 88e1240 Datasheet - Page 3

• Manufacturer Part Number: 88e1240
• Description: Integrated 10/100/1000 Gigabit Ethernet Transceiver
• Manufacturer: Marvell Semiconductor, Inc.

O
The Alaska
contains four independent Gigabit Ethernet trans-
ceivers on a single monolithic IC. Each transceiver
performs all the physical layer functions for
100BASE-TX and 1000BASE-T full or half-duplex
Ethernet on CAT 5 twisted pair cable, and 10BASE-
T full or half-duplex Ethernet on CAT 3, 4, and 5
cable.
The Alaska 88E1240 device supports the Serial
Gigabit Media Independent Interface (SGMII) for
direct connection to a MAC/Switch port.
The 88E1240 device is fully compliant with the
IEEE 802.3 standard. The 88E1240 device includes
the PMD, PMA, and PCS sublayers. The 88E1240
device performs PAM5, 8B/10B, 4B/5B, MLT-3,
NRZI, and Manchester encoding/decoding; digital
clock/data recovery; stream cipher scram-
bling/descrambling; digital adaptive equalization for
the receiver data path as well as digital filtering for
pulse-shaping for the line transmitter; and Auto-
Negotiation and management functions.
The 88E1240 device support Auto-MDI/MDIX at all
three speeds to enable easier installation and
reduced installation costs.
The 88E1240 device integrates MDI interface termi-
nation resistors into the PHY. This resistor integra-
tion facilitates board layout and reduces board cost
by reducing the number of external components.
The new Marvell
achieve and exceed the accuracy requirements of
the IEEE 802.3 return loss specifications.
The 88E1240 device uses advanced mixed-signal
processing to perform equalization, echo and
crosstalk cancellation, data recovery, and error cor-
rection at a gigabit per second data rate. The
device achieves robust performance in noisy envi-
ronments with very low power dissipation.
The 88E1240 device is supported with an inte-
grated Advanced Virtual Cable Tester
enabling fault detection and advanced cable perfor-
mance monitoring.
Copyright © 2011 Marvell
May 4, 2011, Advanced
VERVIEW
®
Integrated 10/100/1000 Gigabit Ethernet Transceiver
Quad family of single-chip devices
®
calibrated resistor scheme will
Document Classification: Proprietary Information
®
(VCT™)
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EATURES
10/100/1000BASE-T IEEE 802.3 compliant
Highly integrated 4-port physical interface
Supports Serial Gigabit Media Independent Interface
(SGMII)
Integrated MDI interface termination resistors
Integrated Advanced Virtual Cable Tester
cable diagnostic feature
Programmable current source LED drivers
"Downshift" mode for two-pair cable installations
User programmable individual/group MDC/MDIO sup-
port
Innovative power management design to reduce on-
chip power by as much as 50%
Fully integrated digital adaptive equalizers, echo can-
cellers, and crosstalk cancellers
Automatic MDI/MDIX crossover for all 3 speeds of oper-
ation including 100BASE-TX and 10BASE-T
Automatic polarity correction
IEEE 802.3u compliant Auto-Negotiation
Direct drive LED support
Loopback mode for diagnostics
Supports IEEE 1149.1 JTAG and 1149.6 AC JTAG
Available in RoHS 6/6 compliant package
Manufactured in a 15 x 15 mm 196-Pin TFBGA pack-
age
88E1240 Product Brief
Doc. No. MV-S103821-00, Rev. A
®
(VCT™)
Page 3