MAX24287 Datasheet, PDF (1/69 Pages) Maxim Integrated Products – 1Gbps Parallel-to-Serial MII Converter Translates Link Speed and Duplex Mode

19-5987; Rev 0; 7/11
MAX24287
1Gbps Parallel-to-Serial MII Converter
General Description
The MAX24287 is a flexible, low-cost Ethernet
interface conversion IC. The parallel interface can be
configured for GMII, RGMII, TBI, RTBI, or 10/100 MII,
while the serial interface can be configured for
1.25Gbps SGMII or 1000BASE-X operation. In
SGMII mode, the device interfaces directly to
Ethernet switch ICs, ASIC MACs, and 1000BASE-T
electrical SFP modules. In 1000BASE-X mode, the
device interfaces directly to 1Gbps 1000BASE-X SFP
optical modules. The MAX24287 performs automatic
translation of link speed and duplex autonegotiation
between parallel MII MDIO and the serial interface.
Microprocessor interaction is optional for device
operation. Hardware-configured modes support
SGMII master and 1000BASE-X autonegotiation
without software involvement.
This device is ideal for interfacing single-channel
GMII/MII devices such as microprocessors, FPGAs,
network processors, Ethernet-over-SONET or -PDH
mappers, and TDM-over-packet circuit emulation
devices. The device also provides a convenient
solution to interface such devices with electrical or
optical Ethernet SFP modules.
Applications
Any System with a Need to Interface a Component
with a Parallel MII Interface (GMII, RGMII, TBI RTBI,
10/100 MII) to a Component with an SGMII or
1000BASE-X Interface
Switches and Routers
Telecom Equipment
Ordering Information
PART
MAX24287ETK+
TEMP RANGE
-40°C to +85°C
PIN-PACKAGE
68 TQFN-EP*
+Denotes a lead(Pb)-free/RoHS-compliant package.
*EP = Exposed pad.
Block Diagram appears on page 7.
Register Map appears on page 41.
Highlighted Features
♦ Bidirectional Wire-Speed Ethernet Interface
Conversion
♦ Can Interface Directly to SFP Modules and
SGMII PHY and Switch ICs
♦ Serial Interface Configurable as 1000BASE-X or
SGMII Revision 1.8 (4-, 6-, or 8-Pin)
♦ Parallel Interface Configurable as GMII, RGMII,
TBI, RTBI, or 10/100 MII
♦ Serial Interface Has Clock and Data Recovery
Block (CDR) and Does Not Require a Clock
Input
♦ Translates Link Speed and Duplex Mode
Negotiation Between MDIO and SGMII PCS
♦ Supports 10/100 MII or RGMII Operation with
SGMII Running at the Same Rate
♦ Configurable for 10/100 MII DTE or DCE
Modes (i.e., Connects to PHY or MAC)
♦ Can Also Be Configured as General-Purpose
1:10 SerDes with Optional Comma Alignment
♦ Supports Synchronous Ethernet by Providing
a 25MHz or 125MHz Recovered Clock and
Accepting a Transmit Clock
♦ Can Provide a 125MHz Clock for the MAC to
Use as GTXCLK
♦ Accepts 10MHz, 12.8MHz, 25MHz or 125MHz
Reference Clock
♦ Can Be Pin-Configured at Reset for Many
Common Usage Scenarios
♦ Optional Software Control Through MDIO
Interface
♦ GPIO Pins Can Be Configured as Clocks,
Status Signals and Interrupt Outputs
♦ 1.2V Operation with 3.3V I/O
♦ Small, 8mm x 8mm, 68-Pin TQFN Package
Maxim Integrated Products 1
Some revisions of this device may incorporate deviations from published specifications known as errata. Multiple
revisions of any device may be simultaneously available through various sales channels. For information about device
errata, go to: www.maxim-ic.com/errata. For pricing, delivery, and ordering information, please contact Maxim Direct at
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.