Functional Description
The HDMP-1687 is a four channel SERDES device. HDMP-1687 is in a 208-ball TBGA package with four 1.0625/1.25 Gbps serial I/O. This integrated circuit provides a lowcost, low-power, small-form-factor physical-layer solution for multi-link Gigabit Ethernet/Fibre Channel interfaces. This IC may be used to directly drive copper cables, or it may be used to interface with optical transceivers. Each IC contains transmit and receive channel circuitry for all four channels.

Features
• Four ANSI x3.230- 1994 Fibre Channel (FC-O) or IEEE 802.3z Gigabit Ethernet compatible SerDes in a single package
• Supports serial data rates of 1062.5 MBd (Fibre Channel) & 1250 MBd (Gigabit Ethernet)
• Based on X3T11 Fibre Channel ”10 bit specification“
• Uses reference clock (RFCT) for Tx data latching
• Half or full speed Rx clocks
• 5-Volt tolerant TTL I/Os
• Low power consumption
• 208 ball, 23 mm TBGA package
• Single +3.3 V power supply
• 1.5 kV ESD protection on all pins
• Equalizers on inputs
• Copper drive capability
• Buffered line logic outputs

Applications
• 1250 MBd Gigabit Ethernet high density ports
• 1062.5 MBd Fibre Channel interface
• Mass storage system I/O channel
• Work station/server I/O channel
• FC interface for disk drives and arrays
• Serial backplanes
• Clusters